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Cadieux C, Brzozowski P, Fernandes RJR, McGregor ME, Zdero R, Bailey CS, McLachlin SD, Rasoulinejad P. Topping-Off a Long Thoracic Stabilization With Semi-Rigid Constructs May Have Favorable Biomechanical Effects to Prevent Proximal Junctional Kyphosis: A Biomechanical Comparison. Global Spine J 2024:21925682241259695. [PMID: 38828634 DOI: 10.1177/21925682241259695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/05/2024] Open
Abstract
STUDY DESIGN In-vitro cadaveric biomechanical study. OBJECTIVES Long posterior spinal fusion is a standard treatment for adult spinal deformity. However, these rigid constructs are known to alter motion and stress to the adjacent non-instrumented vertebrae, increasing the risk of proximal junctional kyphosis (PJK). This study aimed to biomechanically compare a standard rigid construct vs constructs "topped off" with a semi-rigid construct. By understanding semi-rigid constructs' effect on motion and overall construct stiffness, surgeons and researchers could better optimize fusion constructs to potentially decrease the risk of PJK and the need for revision surgery. METHODS Nine human cadaveric spines (T1-T12) underwent non-destructive biomechanical range of motion tests in pure bending or torsion and were instrumented with an all-pedicle-screw (APS) construct from T6-T9. The specimens were sequentially instrumented with semi-rigid constructs at T5: (i) APS plus sublaminar bands; (ii) APS plus supralaminar hooks; (iii) APS plus transverse process hooks; and (iv) APS plus short pedicle screws. RESULTS APS plus transverse process hooks had a range of motion (ie, relative angle) for T4-T5 and T5-T6, as well as an overall mechanical stiffness for T1-T12, that was more favourable, as it reduced motion at adjacent levels without a stark increase in stiffness. Moreover, APS plus transverse process hooks had the most linear change for range of motion across the entire T3-T7 range. CONCLUSIONS Present findings suggest that APS plus transverse process hooks has a favourable biomechanical effect that may reduce PJK for long spinal fusions compared to the other constructs examined.
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Affiliation(s)
- Chloe Cadieux
- London Health Science Centre Combined Neurosurgical and Orthopaedic Spine Program, Schulich School of Medicine, Western University, London, ON, Canada
| | - Pawel Brzozowski
- Orthopaedic Biomechanics Lab, Victoria Hospital, London, ON, Canada
| | - Renan J R Fernandes
- London Health Science Centre Combined Neurosurgical and Orthopaedic Spine Program, Schulich School of Medicine, Western University, London, ON, Canada
| | - Martine E McGregor
- Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Radovan Zdero
- Orthopaedic Biomechanics Lab, Victoria Hospital, London, ON, Canada
| | - Christopher S Bailey
- London Health Science Centre Combined Neurosurgical and Orthopaedic Spine Program, Schulich School of Medicine, Western University, London, ON, Canada
- Orthopaedic Biomechanics Lab, Victoria Hospital, London, ON, Canada
| | - Stewart D McLachlin
- Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Parham Rasoulinejad
- London Health Science Centre Combined Neurosurgical and Orthopaedic Spine Program, Schulich School of Medicine, Western University, London, ON, Canada
- Orthopaedic Biomechanics Lab, Victoria Hospital, London, ON, Canada
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Pennington Z, Mikula AL, Lakomkin N, Martini M, Pinter ZW, Shafi M, Hamouda A, Bydon M, Clarke MJ, Freedman BA, Krauss WE, Nassr AN, Sebastian AS, Fogelson JL, Elder BD. Bone Quality as Measured by Hounsfield Units More Accurately Predicts Proximal Junctional Kyphosis than Vertebral Bone Quality Following Long-Segment Thoracolumbar Fusion. World Neurosurg 2024; 186:e584-e592. [PMID: 38588791 DOI: 10.1016/j.wneu.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/31/2024] [Accepted: 04/01/2024] [Indexed: 04/10/2024]
Abstract
OBJECTIVE To compare the prognostic power of Hounsfield units (HU) and Vertebral Bone Quality (VBQ) score for predicting proximal junctional kyphosis (PJK) following long-segment thoracolumbar fusion to the upper thoracic spine (T1-T6). METHODS Vertebral bone quality around the upper instrumented vertebrae (UIV) was measured using HU on preoperative CT and VBQ on preoperative MRI. Spinopelvic parameters were also categorized according to the Scoliosis Research Society-Schwab classification. Univariable analysis to identify predictors of the occurrence of PJK and survival analyses with Kaplan-Meier method and Cox regression were performed to identify predictors of time to PJK (defined as ≥10° change in Cobb angle of UIV+2 and UIV). Sensitivity analyses showed thresholds of HU < 164 and VBQ > 2.7 to be most predictive for PJK. RESULTS Seventy-six patients (mean age 66.0 ± 7.0 years; 27.6% male) were identified, of whom 15 suffered PJK. Significant predictors of PJK were high postoperative pelvic tilt (P = 0.038), high postoperative T1-pelvic angle (P = 0.041), and high postoperative PI-LL mismatch (P = 0.028). On survival analyses, bone quality, as assessed by the average HU of the UIV and UIV+1 was the only significant predictor of time to PJK (odds ratio [OR] 3.053; 95% CI 1.032-9.032; P = 0.044). VBQ measured using the UIV, UIV+1, UIV+2, and UIV-1 vertebrae approached, but did not reach significance (OR 2.913; 95% CI 0.797-10.646; P = 0.106). CONCLUSIONS In larger cohorts, VBQ may prove to be a significant predictor of PJK following long-segment thoracolumbar fusion. However, Hounsfield units on CT have greater predictive power, suggesting preoperative workup for long-segment thoracolumbar fusion benefits from computed tomography versus magnetic resonance imaging alone to identify those at increased risk of PJK.
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Affiliation(s)
- Zach Pennington
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
| | - Anthony L Mikula
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Nikita Lakomkin
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Michael Martini
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Zachariah W Pinter
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Mahnoor Shafi
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Mohamad Bydon
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Michelle J Clarke
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Brett A Freedman
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - William E Krauss
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Ahmad N Nassr
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Arjun S Sebastian
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Jeremy L Fogelson
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Benjamin D Elder
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
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Pierce KE, Mir JM, Dave P, Lafage R, Lafage V, Park P, Nunley P, Mundis G, Gum J, Tretiakov P, Uribe J, Hostin R, Eastlack R, Diebo B, Kim HJ, Smith JS, Ames CP, Shaffrey C, Burton D, Hart R, Bess S, Klineberg E, Schwab F, Gupta M, Hamilton DK, Passias PG. The Incremental Clinical Benefit of Adding Layers of Complexity to the Planning and Execution of Adult Spinal Deformity Corrective Surgery. Oper Neurosurg (Hagerstown) 2024:01787389-990000000-01169. [PMID: 38771063 DOI: 10.1227/ons.0000000000001192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 03/01/2024] [Indexed: 05/22/2024] Open
Abstract
BACKGROUND AND OBJECTIVES For patients with surgical adult spinal deformity (ASD), our understanding of alignment has evolved, especially in the last 20 years. Determination of optimal restoration of alignment and spinal shape has been increasingly studied, yet the assessment of how these alignment schematics have incrementally added benefit to outcomes remains to be evaluated. METHODS Patients with ASD with baseline and 2-year were included, classified by 4 alignment measures: Scoliosis Research Society (SRS)-Schwab, Age-Adjusted, Roussouly, and Global Alignment and Proportion (GAP). The incremental benefits of alignment schemas were assessed in chronological order as our understanding of optimal alignment progressed. Alignment was considered improved from baseline based on SRS-Schwab 0 or decrease in severity, Age-Adjusted ideal match, Roussouly current (based on sacral slope) matching theoretical (pelvic incidence-based), and decrease in proportion. Patients separated into 4 first improving in SRS-Schwab at 2-year, second Schwab improvement and matching Age-Adjusted, third two prior with Roussouly, and fourth improvement in all four. Comparison was accomplished with means comparison tests and χ2 analyses. RESULTS Sevenhundredthirty-two. patients met inclusion. SRS-Schwab BL: pelvic incidence-lumbar lordosis mismatch (++:32.9%), sagittal vertical axis (++: 23%), pelvic tilt (++:24.6%). 640 (87.4%) met criteria for first, 517 (70.6%) second, 176 (24%) third, and 55 (7.5%) fourth. The addition of Roussouly (third) resulted in lower rates of mechanical complications and proximal junctional kyphosis (48.3%) and higher rates of meeting minimal clinically important difference (MCID) for physical component summary and SRS-Mental (P < .05) compared with the second. Fourth compared with the third had higher rates of MCID for ODI (44.2% vs third: 28.3%, P = .011) and SRS-Appearance (70.6% vs 44.8%, P < .001). Mechanical complications and proximal junctional kyphosis were lower with the addition of Roussouly (P = .024), while the addition of GAP had higher rates of meeting MCID for SRS-22 Appearance (P = .002) and Oswestry Disability Index (P = .085). CONCLUSION Our evaluation of the incremental benefit that alignment schemas have provided in ASD corrective surgery suggests that the addition of Roussouly provided the greatest reduction in mechanical complications, while the incorporation of GAP provided the most significant improvement in patient-reported outcomes.
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Affiliation(s)
- Katherine E Pierce
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, New York, USA
| | - Jamshaid M Mir
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, New York, USA
| | - Pooja Dave
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, New York, USA
| | - Renaud Lafage
- Department of Orthopedic, Lenox Hill Hospital, Northwell, New York, New York, USA
| | - Virginie Lafage
- Department of Orthopedic, Lenox Hill Hospital, Northwell, New York, New York, USA
| | - Paul Park
- Department of Neurologic Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Pierce Nunley
- Spine Institute of Louisiana, Shreveport, Louisiana, USA
| | - Gregory Mundis
- San Diego Center for Spinal Disorders, La Jolla, California, USA
| | - Jeffrey Gum
- Norton Leatherman Spine Center, Louisville, Kentucky, USA
| | - Peter Tretiakov
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, New York, USA
| | - Juan Uribe
- Department of Neurosurgery, University of South Florida, Tampa, Florida, USA
| | - Richard Hostin
- Department of Orthopaedic Surgery, Baylor Scoliosis Center, Dallas, Texas, USA
| | - Robert Eastlack
- Division of Orthopaedic Surgery, Scripps Clinic, La Jolla, California, USA
| | - Bassel Diebo
- Department of Orthopedic Surgery, SUNY Downstate, New York, New York, USA
| | - Han Jo Kim
- Department of Orthopedic, Lenox Hill Hospital, Northwell, New York, New York, USA
| | - Justin S Smith
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - Christopher P Ames
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, California, USA
| | - Christopher Shaffrey
- Departments of Neurosurgery and Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Douglas Burton
- Department of Orthopaedic Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Robert Hart
- Department of Orthopaedic Surgery, Swedish Neuroscience Institute, Seattle, Washington, USA
| | - Shay Bess
- Department of Spine Surgery, Denver International Spine Clinic, Presbyterian St. Luke's/Rocky Mountain Hospital for Children, Denver, Colorado, USA
| | - Eric Klineberg
- Department of Orthopaedic Surgery, University of California, Davis, Davis, California, USA
| | - Frank Schwab
- Department of Orthopedic, Lenox Hill Hospital, Northwell, New York, New York, USA
| | - Munish Gupta
- Department of Orthopaedic Surgery, Washington University, St. Louis, Missouri, USA
| | - D Kojo Hamilton
- Departments of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Peter G Passias
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, New York, USA
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Hamouda AM, Pennington Z, Astudillo Potes M, Mikula AL, Lakomkin N, Martini ML, Abode-Iyamah KO, Freedman BA, McClendon J, Nassr AN, Sebastian AS, Fogelson JL, Elder BD. The Predictors of Incidental Durotomy in Patients Undergoing Pedicle Subtraction Osteotomy for the Correction of Adult Spinal Deformity. J Clin Med 2024; 13:340. [PMID: 38256474 PMCID: PMC10816915 DOI: 10.3390/jcm13020340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/05/2024] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
Background: Pedicle subtraction osteotomy (PSO) is a powerful tool for sagittal plane correction in patients with rigid adult spinal deformity (ASD); however, it is associated with high intraoperative blood loss and the increased risk of durotomy. The objective of the present study was to identify intraoperative techniques and baseline patient factors capable of predicting intraoperative durotomy. Methods: A tri-institutional database was retrospectively queried for all patients who underwent PSO for ASD. Data on baseline comorbidities, surgical history, surgeon characteristics and intraoperative maneuvers were gathered. PSO aggressiveness was defined as conventional (Schwab 3 PSO) or an extended PSO (Schwab type 4). The primary outcome of the study was the occurrence of durotomy intraoperatively. Univariable analyses were performed with Mann-Whitney U tests, Chi-squared analyses, and Fisher's exact tests. Statistical significance was defined by p < 0.05. Results: One hundred and sixteen patients were identified (mean age 61.9 ± 12.6 yr; 44.8% male), of whom 51 (44.0%) experienced intraoperative durotomy. There were no significant differences in baseline comorbidities between those who did and did not experience durotomy, with the exception that baseline weight and body mass index were higher in patients who did not suffer durotomy. Prior surgery (OR 2.73; 95% CI [1.13, 6.58]; p = 0.03) and, more specifically, prior decompression at the PSO level (OR 4.23; 95% CI [1.92, 9.34]; p < 0.001) was predictive of durotomy. A comparison of surgeon training showed no statistically significant difference in durotomy rate between fellowship and non-fellowship trained surgeons, or between orthopedic surgeons and neurosurgeons. The PSO level, PSO aggressiveness, the presence of stenosis at the PSO level, nor the surgical instrument used predicted the odds of durotomy occurrence. Those experiencing durotomy had similar hospitalization durations, rates of reoperation and rates of nonroutine discharge. Conclusions: In this large multisite series, a history of prior decompression at the PSO level was associated with a four-fold increase in intraoperative durotomy risk. Notably the use of extended (versus) standard PSO, surgical technique, nor baseline patient characteristics predicted durotomy. Durotomies occurred in 44% of patients and may prolong operative times. Additional prospective investigations are merited.
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Affiliation(s)
- Abdelrahman M. Hamouda
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
| | - Zach Pennington
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
| | - Maria Astudillo Potes
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
| | - Anthony L. Mikula
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
| | - Nikita Lakomkin
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
| | - Michael L. Martini
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
| | | | - Brett A. Freedman
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Jamal McClendon
- Department of Neurologic Surgery, Mayo Clinic, Phoenix, AZ 85054, USA;
| | - Ahmad N. Nassr
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Arjun S. Sebastian
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Jeremy L. Fogelson
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
| | - Benjamin D. Elder
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA; (A.M.H.); (M.A.P.)
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Gao Y, Jiang H, Gao R, Zhou X. Evaluation of lumbar paraspinal muscles degeneration and fatty infiltration in dynamic sagittal imbalance based on magnetic resonance imaging. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2023:10.1007/s00586-023-08033-4. [PMID: 38043127 DOI: 10.1007/s00586-023-08033-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 08/08/2023] [Accepted: 10/26/2023] [Indexed: 12/05/2023]
Abstract
PURPOSE To explore degeneration and fatty infiltration (FI) of lumbar paraspinal muscles in patients with dynamic sagittal imbalance (DSI) and the relationship between lumbar paraspinal muscles degeneration, fatty infiltration and severity of the disease. METHODS We recruited 41 DSI patients and selected 22 lumbar spinal stenosis (LSS) patients without osphyalgia as controls. All patients received magnetic resonance imaging (MRI) scan and DSI patients also received pre-walk and post-walk X-rays. DSI patients were divided into 2 subgroups according to their symptom improvement after conservative treatment. We calculated rmCSA and FI of the lumbar paraspinal muscles. The rmCSA and FI between DSI and control and between DSI subgroups were compared by t test. The regression analysis was used to explore the risk factors influencing disease severity. Receiver operating characteristic (ROC) curves and area under curves (AUCs) were used to evaluate the severity of the disease. RESULTS In comparison of rmCSA and FI between DSI and control, there are significant differences of most muscles. In comparison of rmCSA between two subgroups, there are significant differences of most muscles, while in comparison of FI, only muscles in L4 segment have significant different. In logistic regression analysis, total rmCSA and total FI are risk factors influencing disease severity. ROC curves shows that total rmCSA and total FI both achieve an AUC greater than 0.7. CONCLUSION Compared with control, DSI patients have degeneration and fatty infiltration of the lumbar paraspinal muscles. The degeneration and fatty infiltration are risk factors influencing disease severity. The total rmCSA and total FI can be used as an indicator to determine whether a patient has severe DSI.
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Affiliation(s)
- Yuan Gao
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China
| | - Heng Jiang
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China
| | - Rui Gao
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China.
| | - Xuhui Zhou
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China.
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Smith JS, Kelly MP, Buell TJ, Ben-Israel D, Diebo B, Scheer JK, Line B, Lafage V, Lafage R, Klineberg E, Kim HJ, Passias P, Gum JL, Kebaish K, Mullin JP, Eastlack R, Daniels A, Soroceanu A, Mundis G, Hostin R, Protopsaltis TS, Hamilton DK, Gupta M, Lewis SJ, Schwab FJ, Lenke LG, Shaffrey CI, Burton D, Ames CP, Bess S. Adult Cervical Deformity Patients Have Higher Baseline Frailty, Disability, and Comorbidities Compared With Complex Adult Thoracolumbar Deformity Patients: A Comparative Cohort Study of 616 Patients. Global Spine J 2023:21925682231214059. [PMID: 37948666 DOI: 10.1177/21925682231214059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2023] Open
Abstract
STUDY DESIGN Multicenter comparative cohort. OBJECTIVE Studies have shown markedly higher rates of complications and all-cause mortality following surgery for adult cervical deformity (ACD) compared with adult thoracolumbar deformity (ATLD), though the reasons for these differences remain unclear. Our objectives were to compare baseline frailty, disability, and comorbidities between ACD and complex ATLD patients undergoing surgery. METHODS Two multicenter prospective adult spinal deformity registries were queried, one ATLD and one ACD. Baseline clinical and frailty measures were compared between the cohorts. RESULTS 616 patients were identified (107 ACD and 509 ATLD). These groups had similar mean age (64.6 vs 60.8 years, respectively, P = .07). ACD patients were less likely to be women (51.9% vs 69.5%, P < .001) and had greater Charlson Comorbidity Index (1.5 vs .9, P < .001) and ASA grade (2.7 vs 2.4, P < .001). ACD patients had worse VR-12 Physical Component Score (PCS, 25.7 vs 29.9, P < .001) and PROMIS Physical Function Score (33.3 vs 35.3, P = .031). All frailty measures were significantly worse for ACD patients, including hand dynamometer (44.6 vs 55.6 lbs, P < .001), CSHA Clinical Frailty Score (CFS, 4.0 vs 3.2, P < .001), and Edmonton Frailty Scale (EFS, 5.15 vs 3.21, P < .001). Greater proportions of ACD patients were frail (22.9% vs 5.7%) or vulnerable (15.6% vs 10.9%) based on EFS (P < .001). CONCLUSIONS Compared with ATLD patients, ACD patients had worse baseline characteristics on all measures assessed (comorbidities/disability/frailty). These differences may help account for greater risk of complications and all-cause mortality previously observed in ACD patients and facilitate strategies for better preoperative optimization.
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Affiliation(s)
- Justin S Smith
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Michael P Kelly
- Department of Orthopedic Surgery, Rady Children's Hospital, San Diego, CA, USA
| | - Thomas J Buell
- Department of Neurosurgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - David Ben-Israel
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Bassel Diebo
- Department of Orthopedic Surgery, Brown University, Providence, RI, USA
| | - Justin K Scheer
- Department of Neurological Surgery, University of California, San Francisco, CA, USA
| | - Breton Line
- Presbyterian St Lukes Medical Center, Denver, CO, USA
| | - Virginie Lafage
- Department of Orthopedic Surgery, Lennox Hill Hospital, New York City, NY, USA
| | - Renaud Lafage
- Department of Orthopedic Surgery, Lennox Hill Hospital, New York City, NY, USA
| | - Eric Klineberg
- Department of Orthopedic Surgery, University of Texas Health Houston, Houston, TX, USA
| | - Han Jo Kim
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York City, NY, USA
| | - Peter Passias
- Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases, New York, NY, USA
| | | | - Khal Kebaish
- Department of Orthopaedic Surgery, Johns Hopkins University, Baltimore, MD, USA
| | - Jeffrey P Mullin
- Department of Neurosurgery, University at Buffalo, Buffalo, NY, USA
| | - Robert Eastlack
- Department of Orthopedic Surgery, Scripps Clinic, San Diego, USA
| | - Alan Daniels
- Department of Orthopedic Surgery, Brown University, Providence, RI, USA
| | - Alex Soroceanu
- Department of Orthopedic Surgery, University of Calgary, Calgary, AB, Canada
| | - Gregory Mundis
- Department of Orthopedic Surgery, Scripps Clinic, San Diego, USA
| | - Richard Hostin
- Department of Orthopaedic Surgery, Baylor Scoliosis Center, Plano, TX, USA
| | | | - D Kojo Hamilton
- Department of Neurosurgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Munish Gupta
- Department of Orthopedic Surgery, Washington University, St Louis, MO, USA
| | - Stephen J Lewis
- Department of Surgery, Division of Orthopedic Surgery, University of Toronto and Toronto Western Hospital, Toronto, ON, Canada
| | - Frank J Schwab
- Department of Orthopedic Surgery, Lennox Hill Hospital, New York City, NY, USA
| | - Lawrence G Lenke
- Department of Orthopedic Surgery, Columbia University Medical Center, New York, NY, USA
| | | | - Douglas Burton
- Department of Orthopaedic Surgery, University of Kansas Medical Center, Kansas City, KA, USA
| | - Christopher P Ames
- Department of Neurological Surgery, University of California, San Francisco, CA, USA
| | - Shay Bess
- Presbyterian St Lukes Medical Center, Denver, CO, USA
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7
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Long Z, Gong F, Xiong L, Wen J, Chen G. Modified posterior osteotomy for osteoporotic vertebral collapse with neurological dysfunction in thoracolumbar spine: a preliminary study. J Orthop Surg Res 2023; 18:688. [PMID: 37715231 PMCID: PMC10502986 DOI: 10.1186/s13018-023-04189-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 09/11/2023] [Indexed: 09/17/2023] Open
Abstract
OBJECTIVE The risk of osteoporotic vertebral collapse (OVC) associated with delayed neurological dysfunction (DND) is substantial, and performing surgery for this condition in elderly patients presents challenges. The focus of the current research is on simplifying surgical procedures while maintaining their effectiveness. This study was designed to contribute clinical data supporting the use of modified posterior osteotomy for treating thoracolumbar OVC with DND. The study compares perioperative clinical parameters, imaging data characteristics, and changes in efficacy outcome indicators to provide evidence for the advancement of this technique. METHODS A total of 12 patients diagnosed with osteoporotic vertebral collapse and neurological dysfunction were included in the study. All patients underwent modified posterior osteotomy. Data regarding perioperative and radiological parameters as well as complications such as surgery duration, blood loss, ASIA grade, VAS, ODI, regional kyphosis angle (RKA), anterior vertebral height ratio (AVHr), and spinal canal clearance ratio (SCCr), were collected retrospectively. These parameters were then analysed to evaluate the clinical efficacy and safety of the modified posterior osteotomy technique. RESULTS A total of 12 patients were included in the study, with a mean age of 65.5 ± 9.7 years. The average follow-up period was 29.4 ± 5.0 months. The mean operative blood loss was 483.3 ± 142.0 ml, and the average operative time was 3.7 ± 0.7 h. The visual analogue scale (VAS) score decreased from a preoperative value of 5.8 ± 0.7 to a final follow-up value of 1.3 ± 0.8 (P < 0.05), indicating a significant improvement in pain. The ODI decreased from 65.2 ± 6.0 before surgery to 20.5 ± 7.0, indicating a decrease in disability, and the postoperative neurological function showed a significant improvement. Correction of the RKA was observed, with the angle changing from 35.8 ± 10.8° before surgery to 20.0 ± 3.5° after surgery and to 22.5 ± 3.1° at the final follow-up. Similarly, correction of the AVHr was observed, with the height changing from 39.3 ± 18.0 to 63.0 ± 14.3 after surgery and to 53.9 ± 8.9 at the final follow-up. Correction of the SCCr was also observed, with the ratio changing from 54.9 ± 5.4 to 68.1 ± 5.3 after surgery and to 68.68 ± 6.76 at the final follow-up. CONCLUSIONS Posterior modified osteotomy is an effective treatment for thoracolumbar osteoporotic fractures with OVC combined with DND. It can significantly preserve vertebral height, increase vertebral canal volume, correct kyphotic angle, and improve postoperative neurological function. The simplified osteotomy also offers advantages in terms of operating time, blood loss, postoperative VAS score, and improvement in lumbar function.
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Affiliation(s)
- Zhisheng Long
- Medical College, Nanchang University, Nanchang, 330006, Jiangxi, China
- Department of Orthopedics, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China
| | - Feipeng Gong
- Department of Orthopedics, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China
| | - Long Xiong
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Jiabin Wen
- Department of Orthopedics, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China.
| | - Gang Chen
- Department of Orthopedics, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi, China
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Katz AD, Galina J, Song J, Hasan S, Perfetti D, Virk S, Silber J, Essig D. Impact of Navigation on 30-Day Outcomes for Adult Spinal Deformity Surgery. Global Spine J 2023; 13:1728-1736. [PMID: 34569338 PMCID: PMC10556894 DOI: 10.1177/21925682211047551] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
STUDY DESIGN Retrospective database study. OBJECTIVE Navigation has been increasingly used to treat degenerative disease, with positive radiographic and clinical outcomes and fewer adverse events and reoperations, despite increased operative time. However, short-term analysis on treating adult spinal deformity (ASD) surgery with navigation is limited, particularly using large nationally represented cohorts. This is the first large-scale database study to compare 30-day readmission, reoperation, morbidity, and value-per-operative time for navigated and conventional ASD surgery. METHODS Adults were identified in the National Surgical Quality Improvement Program (NSQIP) database. Multivariate regression was used to compare outcomes between navigated and conventional surgery and to control for predictors and baseline differences. RESULTS 3190 ASD patients were included. Navigated and conventional patients were similar. Navigated cases had greater operative time (405 vs 320 min) and mean RVUs per case (81.3 vs 69.7), and had more supplementary pelvic fixations (26.1 vs 13.4%) and osteotomies (50.3 vs 27.7%) (P <.001).In univariate analysis, navigation had greater reoperation (9.9 vs 5.2%, P = .011), morbidity (57.8 vs 46.8%, P = .007), and transfusion (52.2 vs 41.8%, P = .010) rates. Readmission was similar (11.9 vs 8.4%). In multivariate analysis, navigation predicted reoperation (OR = 1.792, P = .048), but no longer predicted morbidity or transfusion. Most reoperations were infectious and hardware-related. CONCLUSIONS Despite controlling for patient-related and procedural factors, navigation independently predicted a 79% increased odds of reoperation but did not predict morbidity or transfusion. Readmission was similar between groups. This is explained, in part, by greater operative time and transfusion, which are risk factors for infection. Reoperation most frequently occurred for wound- and hardware-related reasons, suggesting navigation carries an increased risk of infectious-related events beyond increased operative time.
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Affiliation(s)
- Austen D. Katz
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
| | - Jesse Galina
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
| | - Junho Song
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
| | - Sayyida Hasan
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
| | - Dean Perfetti
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
| | - Sohrab Virk
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
| | - Jeff Silber
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
| | - David Essig
- Department of Orthopedic Surgery, North Shore University Hospital-Long Island Jewish Medical Center, Zucker School of Medicine at Hofstra University, New Hyde Park, NY, USA
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Lee BJ, Bae SS, Choi HY, Park JH, Hyun SJ, Jo DJ, Cho Y. Proximal Junctional Kyphosis or Failure After Adult Spinal Deformity Surgery - Review of Risk Factors and Its Prevention. Neurospine 2023; 20:863-875. [PMID: 37798982 PMCID: PMC10562224 DOI: 10.14245/ns.2346476.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/06/2023] [Accepted: 06/16/2023] [Indexed: 10/07/2023] Open
Abstract
Proximal junction kyphosis (PJK) is a common imaging finding after long-level fusion, and proximal junctional failure (PJF) is an aggravated form of the progressive disease spectrum of PJK. This includes vertebral fracture of upper instrumented vertebra (UIV) or UIV+1, instability between UIV and UIV+1, neurological deterioration requiring surgery. Many studies have reported on PJK and PJF after long segment instrumentation for adult spinal deformity (ASD). In particular, for spine deformity surgeons, risk factors and prevention strategies of PJK and PJF are very important to minimize reoperation. Therefore, this review aims to help reduce the occurrence of PJK and PJF by updating the latest contents of PJK and PJF by 2023, focusing on the risk factors and prevention strategies of PJK and PJF. We conducted a search on multiple database for articles published until February 2023 using the search keywords "proximal junctional kyphosis," "proximal junctional failure," "proximal junctional disease," and "adult spinal deformity." Finally, 103 papers were included in this study. Numerous factors have been suggested as potential risks for the development of PJK and PJF, including a high body mass index, inadequate postoperative sagittal balance and overcorrection, advanced age, pelvic instrumentation, and osteoporosis. Recently, with the increasing elderly population, sarcopenia has been emphasized. The quality and quantity of muscle in the surgical site have been suggested as new risk factor. Therefore, spine surgeon should understand the pathophysiology of PJK and PJF, as well as individual risk factors, in order to develop appropriate prevention strategies for each patient.
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Affiliation(s)
- Byung-Jou Lee
- Department of Neurosurgery, Inje University Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
| | - Sung Soo Bae
- Department of Neurosurgery, Kyung Hee University Hospital at Gangdong, Kyung Hee University College of Medicine, Seoul, Korea
| | - Ho Young Choi
- Department of Neurosurgery, Kyung Hee University Hospital at Gangdong, Kyung Hee University College of Medicine, Seoul, Korea
| | - Jin Hoon Park
- Department of Neurosurgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Seung-Jae Hyun
- Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Dae Jean Jo
- Department of Neurosurgery, Kyung Hee University Hospital at Gangdong, Kyung Hee University College of Medicine, Seoul, Korea
| | - Yongjae Cho
- Department of Neurosurgery, Ewha Womans University School of Medicine, Seoul, Korea
| | - Korean Spinal Deformity Society (KSDS)
- Department of Neurosurgery, Inje University Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea
- Department of Neurosurgery, Kyung Hee University Hospital at Gangdong, Kyung Hee University College of Medicine, Seoul, Korea
- Department of Neurosurgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- Department of Neurosurgery, Spine Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
- Department of Neurosurgery, Ewha Womans University School of Medicine, Seoul, Korea
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10
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Sherif S, Ling J, Zapolsky I, Falk DP, Bondar K, Arlet V, Saifi C. Pelvic Fixation With a Quad-Rod Technique Using S2 Alar Iliac and Medialized Entry Iliac Screws for Long Fusion Constructs. J Am Acad Orthop Surg Glob Res Rev 2023; 7:01979360-202308000-00009. [PMID: 37595189 PMCID: PMC10435050 DOI: 10.5435/jaaosglobal-d-22-00251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 05/14/2023] [Indexed: 08/20/2023]
Abstract
PURPOSE Patients with adult spinal deformity (ASD) may have risk factors for nonunion and subsequent instrumentation failure. This study reviews a novel surgical technique for a quad-rod construct to the pelvis using both S2 alar iliac (S2AI) screw fixation and medialized entry iliac screw fixation as described through three separate cases and a review of the literature. METHODS This technique facilitates alignment of the construct and rod insertion into the tulip heads. The medialized iliac screw technique also avoids the potential soft-tissue complications of the conventional iliac screw bolt given that it is deeper and has more soft-tissue coverage. RESULTS Three cases performed by the most senior author (V.A.) in which this novel technique was used are presented in this report along with clinical and radiographic images to educate the reader on appropriate execution of this technique. A review of the existing literature regarding pelvic fixation techniques for ASD was also done. CONCLUSION Quad-rod augmentation of long thoracolumbar spinal constructs with two independent SI anchoring points is potentially an effective technique to increase lumbar sacral construct rigidity, thereby promoting fusion rates and decreasing revision rates. The described technique provides spine surgeons with an additional tool in their armamentarium to treat patients with complex ASD.
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Affiliation(s)
- Sherif Sherif
- From the Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA (Dr. Sherif, Dr. Zapolsky, Dr. Falk, and Dr. Arlet); the Texas A&M College of Medicine, Bryan, TX (Mr. Ling); Department of Orthopedics and Sports Medicine Houston Methodist Hospital, Houston, TX (Dr. Bondar andDr. Saifi)
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11
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Gonzales-Portillo GS, Mamaril-Davis JC, Riordan K, Avila MJ, Aguilar-Salinas P, Burket A, Dumont T. Evaluation of the Thoracolumbar Injury Classification and Severity (TLICS) Score Over a Two-Year Period at a Level One Trauma Center. Cureus 2023; 15:e43762. [PMID: 37600439 PMCID: PMC10439826 DOI: 10.7759/cureus.43762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2023] [Indexed: 08/22/2023] Open
Abstract
Introduction The use of the Thoracolumbar Injury Classification and Severity Score (TLICS) and other classification systems for guiding the management of traumatic spinal injuries remains controversial. TLICS is one of the few classifications that provides treatment recommendations.We sought to analyze intervention modality selection based on the TLICS scoring system. Methods A retrospective review of patients presenting with traumatic thoracolumbar fractures at a level 1 trauma center over a two-year period was performed. Primary endpoints for comparison analysis included visual analog scale (VAS) scores and Cobb angles during follow-up. Results There were 272 patients with thoracolumbar fractures, of whom 212 had TLICS of ≤3, six with TLICS of 4, and 54 with TLICS of ≥5. Of the 272 total patients, 59 were treated via surgery and 213 via non-surgical conservative methods. The VAS scores significantly decreased from presentation to last follow-up in both surgically treated and conservative groups (p<0.0001). This remained consistent in subgroup analyses of TLICS ≤ 3, TLICS = 4, and TLICS ≥ 5 (p<0.0001). Burst fractures treated conservatively had larger fracture Cobb angles versus those treated via surgery at the last follow-up, although this was not significantly associated (p=0.07). The only significant relationship with Cobb angles was in distraction fractures of the TLICS > 4 conservative group, who had significantly lower Cobb angles at the last follow-up than the TLICS > 4 surgical group (p<0.04). The "surgeon's choice" for TLICS = 4 was surgical intervention (4/6 patients, 66.7%). Conclusion Using the TLICS score, thoracolumbar injuries in a level 1 trauma center are more commonly TLICS ≤ 3. For patients with TLICS = 4, the surgeon's choice was most commonly surgical repair. VAS scores decreased over time from presentation between surgically and conservatively managed patients (as well as within-group analyses). The data concerning Cobb angles were more ambiguous, as larger Cobb angles in burst fractures treated conservatively did not show statistically significant differences with surgery.
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Affiliation(s)
| | | | - Katherine Riordan
- Medicine, The University of Arizona College of Medicine, Tucson, USA
| | - Mauricio J Avila
- Neurosurgery, The University of Arizona College of Medicine, Tucson, USA
| | | | - Aaron Burket
- Neurosurgery, The University of Arizona College of Medicine, Tucson, USA
| | - Travis Dumont
- Neurosurgery, University of Arizona College of Medicine, Tucson, USA
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12
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Murata S, Hashizume H, Tsutsui S, Oka H, Teraguchi M, Ishomoto Y, Nagata K, Takami M, Iwasaki H, Minamide A, Nakagawa Y, Tanaka S, Yoshimura N, Yoshida M, Yamada H. Pelvic compensation accompanying spinal malalignment and back pain-related factors in a general population: the Wakayama spine study. Sci Rep 2023; 13:11862. [PMID: 37481604 PMCID: PMC10363166 DOI: 10.1038/s41598-023-39044-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 07/19/2023] [Indexed: 07/24/2023] Open
Abstract
Some older adults with spinal deformity maintain standing posture via pelvic compensation when their center of gravity moves forward. Therefore, evaluations of global alignment should include both pelvic tilt (PT) and seventh cervical vertebra-sagittal vertical axis (C7-SVA). Here, we evaluate standing postures of older adults using C7-SVA with PT and investigate factors related to postural abnormality. This cross-sectional study used an established population-based cohort in Japan wherein 1121 participants underwent sagittal whole-spine radiography in a standing position and bioelectrical impedance analysis for muscle mass measurements. Presence of low back pain (LBP), visual analog scale (VAS) of LBP, and LBP-related disability (Oswestry Disability Index [ODI]) were evaluated. Based on the PT and C7-SVA, the participants were divided into four groups: normal, compensated, non-compensated, and decompensated. We defined the latter three categories as "malalignment" and examined group characteristics and factors. There were significant differences in ODI%, VAS and prevalence of LBP, and sarcopenia among the four groups, although these were non-significant between non-compensated and decompensated groups on stratified analysis. Moreover, the decompensated group was significantly associated with sarcopenia. Individuals with pelvic compensation are at increased risk for LBP and related disorders even with the C7-SVA maintained within normal range.
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Affiliation(s)
- Shizumasa Murata
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - Hiroshi Hashizume
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan.
| | - Shunji Tsutsui
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - Hiroyuki Oka
- Division of Musculoskeletal AI System Development, Graduate School of Medicine, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
| | - Masatoshi Teraguchi
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - Yuyu Ishomoto
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - Keiji Nagata
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - Masanari Takami
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - Hiroshi Iwasaki
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - Akihito Minamide
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
- Spine Center, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Nikko City, Tochigi, Japan
| | - Yukihiro Nakagawa
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, Japan
| | - Sakae Tanaka
- Department of Orthopaedic Surgery, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan
| | - Noriko Yoshimura
- Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical and Research Center, The University of Tokyo, Bunkyoku, Tokyo, Japan
| | - Munehito Yoshida
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
- Department of Orthopedic Surgery, Sumiya Orthopaedic Hospital, 337 Yoshida, Wakayama, Japan
| | - Hiroshi Yamada
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
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Gibbs D, Grossbach AJ, Mallory N, Toop N, Viljoen S. Delayed stenosis associated with sublaminar band placement in the thoracic spine for proximal junctional kyphosis. Surg Neurol Int 2023; 14:211. [PMID: 37404519 PMCID: PMC10316135 DOI: 10.25259/sni_375_2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 05/05/2022] [Indexed: 07/06/2023] Open
Abstract
Background Proximal junctional thoracic kyphosis (PJK) is common following adult spinal deformity (ASD) surgery and may require revision operations. In this case series, we present delayed complications associated with the use of sublaminar banding (SLBs) for PJK prophylaxis. Case Description Three patients underwent long-segment thoracolumbar decompression and fusions for ASD. All had undergone SLB placement for PJK prophylaxis. All three subsequently developed neurologic complications secondary to cephalad spinal cord compression/stenosis requiring urgent revision surgery. Conclusion The placement of SLBs placed to prevent PJK may lead to sublaminar inflammation contributing to severe cephalad spinal canal stenosis and myelopathy following ASD surgery. Surgeons should be aware of this potential complication and may consider alternatives to SLB placement to avoid this complication.
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Affiliation(s)
- David Gibbs
- Department of Neurological Surgery, College of Medicine, The Ohio State University,Columbus, United States
| | - Andrew James Grossbach
- Department of Neurological Surgery, The Ohio State University Wexner Medical Center, Columbus, United States
| | - Noah Mallory
- Department of Neurological Surgery, College of Medicine, The Ohio State University,Columbus, United States
| | - Nathaniel Toop
- Department of Neurological Surgery, The Ohio State University Wexner Medical Center, Columbus, United States
| | - Stephanus Viljoen
- Department of Neurological Surgery, The Ohio State University Wexner Medical Center, Columbus, United States
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Schreiber S, Whibley D, Somers EC. Schroth Physiotherapeutic Scoliosis-Specific Exercise (PSSE) Trials-Systematic Review of Methods and Recommendations for Future Research. CHILDREN (BASEL, SWITZERLAND) 2023; 10:954. [PMID: 37371186 DOI: 10.3390/children10060954] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 05/18/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023]
Abstract
The Schroth method is a non-operative treatment for scoliosis and kyphosis, used standalone or as an adjunct to bracing. While supporting evidence for its effectiveness is emerging, methodologic standardization and rigor are equivocal. Thus, we aimed to systematically review methods of published Schroth physiotherapeutic scoliosis-specific exercise (PSSE) trials and provide guidance for future research. We searched six databases for randomized controlled trials (RCT) and non-randomized studies of interventions (NRSIs) investigating the effect of Schroth in children and adults with scoliosis or kyphosis. General characteristics, methodological approaches, treatment protocols, and outcomes reporting were analyzed. Risk of bias (RoB) was assessed using an adapted Cochrane RoB2 tool for RCTs and ROBINS-I for NRSI. Eligible studies (n = 7) were conducted in six countries and included patients with Scheuermann's kyphosis (n = 1) and adolescent idiopathic scoliosis (n = 6). Though all seven studies used the term Schroth to describe their interventions, the Schroth method was used in four of seven studies, of which only one used Schroth classification, three used Schroth therapists, and none prospectively registered the study protocol. Overall, methodological rigor was suboptimal, potentially invalidating evidence synthesis. Authors should follow minimum standards for reporting, including prospectively registering detailed protocols; using appropriate exercise labeling, Schroth classification and certified therapists; naming and describing exercises per classification; and providing therapy dosages, prescription methods, and adherence.
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Affiliation(s)
- Sanja Schreiber
- Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, AB T6G 2G4, Canada
- Curvy Spine-Specialized Scoliosis, Kyphosis and Other Spinal Disorders Centre, Edmonton, AB T6E 1W7, Canada
| | - Daniel Whibley
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI 48109, USA
| | - Emily C Somers
- Departments of Internal Medicine, Environmental Health Sciences and Obstetrics & Gynecology, University of Michigan, Ann Arbor, MI 48109, USA
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Lord EL, Ayres E, Woo D, Vasquez-Montes D, Parekh Y, Jain D, Buckland A, Protopsaltis T. The Impact of Global Alignment and Proportion Score and Bracing on Proximal Junctional Kyphosis in Adult Spinal Deformity. Global Spine J 2023; 13:651-658. [PMID: 33977791 DOI: 10.1177/21925682211001812] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
STUDY DESIGN Retrospective chart review. OBJECTIVE The goal of this study is to examine the relationship between global alignment and proportion (GAP) score and postoperative orthoses with likelihood of developing proximal junctional kyphosis (PJK). METHODS Patients who underwent thoracic or lumbar fusions of ≥4 levels for adult spinal deformity (ASD) with 1-year post-operative alignment x-rays were included. Chart review was conducted to determine spinopelvic alignment parameters, PJK, and reoperation. RESULTS A total of 81 patients were included; baseline and 1-year postoperative alignment did not differ between patients with and without PJK. There was no PJK in 53.1%, 29.6% had PJK from 10-20°, and 17.3% had severe PJK over 20° (sPJK). At baseline, 80% of patients had severely disproportioned GAP, 13.75% moderate, 6.25% proportioned. GAP improved across the population, but improved GAP was not associated with sPJK. Greater correction of the upper instrumented vertebra to pelvic angle (UIV-PA) was associated with a larger PJK angle (PJKA) change (R = -0.28) as was the 1 year T1-upper instrumented vertebra (T1-UIV) angle (R = 0.30), both P < .05. GAP change was not correlated with PJKA change. Postoperative orthoses were used in 46% of patients and did not impact sPJK. CONCLUSIONS There was no correlation between PJK and GAP or change in GAP. Greater correction of UIV-PA and larger postop T1-UIV was associated with greater PJKA change; suggesting that the greater alignment correction led to greater likelihood of failure. Postoperative orthoses had no impact on PJK.
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Affiliation(s)
| | - Ethan Ayres
- 12294Columbia University College of Physicians and Surgeons, NY, USA
| | | | | | - Yesha Parekh
- 12287Rutgers Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | - Deeptee Jain
- 7548Washington University in Saint Louis, Saint Louis, MO, USA
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Lazaro B, Sardi JP, Smith JS, Kelly MP, Yanik EL, Dial B, Hills J, Gupta MC, Baldus CR, Yen CP, Lafage V, Ames CP, Bess S, Schwab F, Shaffrey CI, Bridwell KH. Proximal junctional failure in primary thoracolumbar fusion/fixation to the sacrum/pelvis for adult symptomatic lumbar scoliosis: long-term follow-up of a prospective multicenter cohort of 160 patients. J Neurosurg Spine 2023; 38:319-330. [PMID: 36334285 DOI: 10.3171/2022.9.spine22549] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 09/30/2022] [Indexed: 12/04/2022]
Abstract
OBJECTIVE Proximal junctional failure (PJF) is a severe form of proximal junctional kyphosis. Previous reports on PJF have been limited by heterogeneous cohorts and relatively short follow-ups. The authors' objectives herein were to identify risk factors for PJF and to assess its long-term incidence and revision rates in a homogeneous cohort. METHODS The authors reviewed data from the Adult Symptomatic Lumbar Scoliosis 1 trial (ASLS-1), a National Institutes of Health-sponsored prospective multicenter study. Inclusion criteria were an age ≥ 40 years, ASLS (Cobb angle ≥ 30° and Oswestry Disability Index [ODI] ≥ 20 or Scoliosis Research Society revised 22-item questionnaire [SRS-22r] score ≤ 4.0 in pain, function, or self-image domains), and primary thoracolumbar fusion/fixation to the sacrum/pelvis of ≥ 7 levels. PJF was defined as a postoperative proximal junctional angle (PJA) change > 20°, fracture of the uppermost instrumented vertebra (UIV) or UIV+1 with > 20% vertebral height loss, spondylolisthesis of UIV/UIV+1 > 3 mm, or UIV screw dislodgment. RESULTS One hundred sixty patients (141 women) were included in this analysis and had a median age of 62 years and a mean follow-up of 4.3 years (range 0.1-6.1 years). Forty-six patients (28.8%) had PJF at a median of 0.92 years (IQR 0.14, 1.23 years) following surgery. Based on Kaplan-Meier analyses, PJF rates at 1, 2, 3, and 4 years were 14.4%, 21.9%, 25.9%, and 27.4%, respectively. On univariate analysis, PJF was associated with greater age (p = 0.0316), greater body mass index (BMI; p = 0.0319), worse baseline patient-reported outcome measures (PROMs; ODI, SRS-22r, and SF-12 Physical Component Summary [PCS]; all p < 0.04), the use of posterior column osteotomies (PCOs; p = 0.0039), and greater postoperative thoracic kyphosis (TK; p = 0.0031) and PJA (p < 0.001). The use of UIV hooks was protective against PJF (p = 0.0340). On regression analysis (without postoperative measures), PJF was associated with greater BMI (HR 1.077, 95% CI 1.007-1.153, p = 0.0317), lower preoperative PJA (HR 0.607, 95% CI 0.407-0.906, p = 0.0146), and greater preoperative TK (HR 1.362, 95% CI 1.082-1.715, p = 0.0085). Patients with PJF had worse PROMs at the last follow-up (ODI, SRS-22r subscore and self-image, and SF-12 PCS; p < 0.04). Sixteen PJF patients (34.8%) underwent revision, and PJF recurred in 3 (18.8%). CONCLUSIONS Among 160 primary ASLS patients with a median age of 62 years and predominant coronal deformity, the PJF rate was 28.8% at a mean 4.3-year follow-up, with a revision rate of 34.8%. On univariate analysis, PJF was associated with a greater age and BMI, worse baseline PROMs, the use of PCOs, and greater postoperative TK and PJA. The use of UIV hooks was protective against PJF. On multivariate analysis (without postoperative measures), a higher risk of PJF was associated with greater BMI and preoperative TK and lower preoperative PJA.
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Affiliation(s)
- Bruno Lazaro
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Juan Pablo Sardi
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Justin S Smith
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Michael P Kelly
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Elizabeth L Yanik
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Brian Dial
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Jeffrey Hills
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Munish C Gupta
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Christine R Baldus
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Chun Po Yen
- 1Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | | | - Christopher P Ames
- 4Department of Neurosurgery, University of California, San Francisco, California
| | - Shay Bess
- 5Denver International Spine Center, Presbyterian St. Luke's/Rocky Mountain Hospital for Children, Denver, Colorado; and
| | | | - Christopher I Shaffrey
- and Departments of6Neurosurgery and
- 7Orthopedic Surgery, Duke University, Durham, North Carolina
| | - Keith H Bridwell
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
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17
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Early Postural Stability Changes in Patients Undergoing Correction of Spinal Deformity: A Prospective, Controlled Pilot Study. Spine (Phila Pa 1976) 2023; 48:240-246. [PMID: 36692155 DOI: 10.1097/brs.0000000000004527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 10/09/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND CONTEXT Adult spinal deformity (ASD) is a prevalent condition often requiring surgical intervention. Improved outcomes among ASD patients have been shown to correlate with postoperative spinopelvic parameters, yet little is currently known about the role of postural stability and balance assessment for ASD patients. PURPOSE Explore early changes in postural stability following ASD correction. STUDY DESIGN Prospective cohort study. PATIENT SAMPLE Sixteen adult patients who underwent four-level or greater posterolateral fusion to address global spinal malalignment and 14 healthy controls with no known spinal deformity nor surgery. OUTCOME MEASURES Postural stability parameters, spinopelvic parameters preoperatively and postoperatively. METHODS Force plate balance assessment was completed where participants and healthy controls were instructed to stand with their hands at their sides, standing still, with eyes open. Center of pressure (COP), center of gravity (COG), and cone of economy (COE) parameters were analyzed with paired and unpaired t tests with an alpha of 0.05. RESULTS Preoperatively, ASD patients demonstrated more COG (P=0.0244) and sagittal and coronal head (P<0.05) sway than healthy controls. Postoperatively, ASD patients exhibited less COP (P=0.0308), COG (P=0.0276) and head (P=0.0345) sway. Compared to healthy controls, ASD patients postoperatively exhibited similar postural stability, aside from COP and COG sway amplitudes (P<0.05), and coronal head sway (P=0.0309). Pelvic incidence-lumbar lordosis and sagittal vertical axis improved from 16.2° to 4.8° (P<0.01) and 82.2 to 22.5 mm (P<0.01), respectively. CONCLUSION We report a novel early improvement in postural stability, comparable to healthy controls, following ASD correction that may be related to improved spinopelvic alignment. Force plate evaluation may be a useful tool for ASD patients postoperatively. Future clinical trials assessing the impact of postural stability on clinical and radiographic outcomes are warranted.
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18
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Sardi JP, Lazaro B, Smith JS, Kelly MP, Dial B, Hills J, Yanik EL, Gupta M, Baldus CR, Yen CP, Lafage V, Ames CP, Bess S, Schwab F, Shaffrey CI, Bridwell KH. Rod fractures in thoracolumbar fusions to the sacrum/pelvis for adult symptomatic lumbar scoliosis: long-term follow-up of a prospective, multicenter cohort of 160 patients. J Neurosurg Spine 2023; 38:217-229. [PMID: 36461845 DOI: 10.3171/2022.8.spine22423] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 08/04/2022] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Previous reports of rod fracture (RF) in adult spinal deformity are limited by heterogeneous cohorts, low follow-up rates, and relatively short follow-up durations. Since the majority of RFs present > 2 years after surgery, true occurrence and revision rates remain unclear. The objectives of this study were to better understand the risk factors for RF and assess its occurrence and revision rates following primary thoracolumbar fusions to the sacrum/pelvis for adult symptomatic lumbar scoliosis (ASLS) in a prospective series with long-term follow-up. METHODS Patient records were obtained from the Adult Symptomatic Lumbar Scoliosis-1 (ASLS-1) database, an NIH-sponsored multicenter, prospective study. Inclusion criteria were as follows: patients aged 40-80 years undergoing primary surgeries for ASLS (Cobb angle ≥ 30° and Oswestry Disability Index ≥ 20 or Scoliosis Research Society-22r ≤ 4.0 in pain, function, and/or self-image) with instrumented fusion of ≥ 7 levels that included the sacrum/pelvis. Patients with and without RF were compared to assess risk factors for RF and revision surgery. RESULTS Inclusion criteria were met by 160 patients (median age 62 years, IQR 55.7-67.9 years). At a median follow-up of 5.1 years (IQR 3.8-6.6 years), there were 92 RFs in 62 patients (38.8%). The median time to RF was 3.0 years (IQR 1.9-4.54 years), and 73% occurred > 2 years following surgery. Based on Kaplan-Meier analyses, estimated RF rates at 2, 4, 5, and 8 years after surgery were 11%, 24%, 35%, and 49%, respectively. Baseline radiographic, clinical, and demographic characteristics were similar between patients with and without RF. In Cox regression models, greater postoperative pelvic tilt (HR 1.895, 95% CI 1.196-3.002, p = 0.0065) and greater estimated blood loss (HR 1.02, 95% CI 1.005-1.036, p = 0.0088) were associated with increased risk of RF. Thirty-eight patients (61% of all RFs) underwent revision surgery. Bilateral RF was predictive of revision surgery (HR 3.52, 95% CI 1.8-6.9, p = 0.0002), while patients with unilateral nondisplaced RFs were less likely to require revision (HR 0.39, 95% CI 0.18-0.84, p = 0.016). CONCLUSIONS This study provides what is to the authors' knowledge the highest-quality data to date on RF rates following ASLS surgery. At a median follow-up of 5.1 years, 38.8% of patients had at least one RF. Estimated RF rates at 2, 4, 5, and 8 years after surgery were 11%, 24%, 35%, and 49%, respectively. Greater estimated blood loss and postoperative pelvic tilt were significant risk factors for RF. These findings emphasize the importance of long-term follow-up to realize the true prevalence and cumulative incidence of RF.
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Affiliation(s)
- Juan Pablo Sardi
- 1Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Bruno Lazaro
- 1Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Justin S Smith
- 1Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Michael P Kelly
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Brian Dial
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Jeffrey Hills
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Elizabeth L Yanik
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Munish Gupta
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Christine R Baldus
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Chun Po Yen
- 1Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | | | - Christopher P Ames
- 4Department of Neurosurgery, University of California, San Francisco, California
| | - Shay Bess
- 5Denver International Spine Center, Presbyterian St. Luke's/Rocky Mountain Hospital for Children, Denver, Colorado; and
| | | | - Christopher I Shaffrey
- Departments of6Neurosurgery and
- 7Orthopedic Surgery, Duke University, Durham, North Carolina
| | - Keith H Bridwell
- 2Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
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19
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Camino-Willhuber G, Guiroy A, Servidio M, Astur N, Nin-Vilaró F, Alvarado-Gomez F, Daher M, Saciloto B, Ono A, Letaif O, Zarate-Kalfopulos B, Yurac R, Vialle E, Valacco M. Unplanned Readmission Following Early Postoperative Complications After Fusion Surgery in Adult Spine Deformity: A Multicentric Study. Global Spine J 2023; 13:74-80. [PMID: 33504208 PMCID: PMC9837501 DOI: 10.1177/2192568221991101] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
STUDY DESIGN Multicentric retrospective study, Level of evidence III. OBJECTIVE The objective of this multicentric study was to analyze the prevalence and risk factors of early postoperative complications in adult spinal deformity patients treated with fusion. Additionally, we studied the impact of complications on unplanned readmission and hospital length of stay. METHODS Eight spine centers from 6 countries in Latin America were involved in this study. Patients with adult spinal deformity treated with fusion surgery from 2017 to 2019 were included. Baseline and surgical characteristics such as age, sex, comorbidities, smoking, number of levels fused, number of surgical approaches were analyzed. Postoperative complications at 30 days were recorded according to Clavien-Dindo and Glassman classifications. RESULTS 172 patients (120 females/52 males, mean age 59.4 ± 17.6) were included in our study. 78 patients suffered complications (45%) at 30 days, 43% of these complications were considered major. Unplanned readmission was observed in 35 patients (20,3%). Risk factors for complications were: Smoking, previous comorbidities, number of levels fused, two or more surgical approaches and excessive bleeding. Hospital length of stay in patients without and with complications was of 7.8 ± 13.7 and 17 ± 31.1 days, respectively (P 0.0001). CONCLUSION The prevalence of early postoperative complications in adult spinal deformity patients treated with fusion was of 45% in our study with 20% of unplanned readmissions at 30 days. Presence of complications significantly increased hospital length of stay.
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Affiliation(s)
- Gaston Camino-Willhuber
- Institute of Orthopedics “Carlos E.
Ottolenghi,” Hospital Italiano de Buenos Aires, Buenos Aires, Argentina,AOSpine Latin America Study Group,
Curitiba, Brazil,Gaston Camino-Willhuber, Orthopaedic and
Traumatology Department. Institute of Orthopedics “Carlos E. Ottolenghi,”
Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
| | - Alfredo Guiroy
- AOSpine Latin America Study Group,
Curitiba, Brazil,Spine Unit, Orthopedic Department,
Hospital Español de Mendoza, Mendoza, Argentina
| | | | - Nelson Astur
- AOSpine Latin America Study Group,
Curitiba, Brazil,Santa Casa de Misericordia de San Pablo,
São Paulo, Brazil,Hospital Israelita Albert Einstein,
Morumbi, São Paulo, Brazil
| | | | | | - Murilo Daher
- Departamento de Ortopedia e
Traumatologia, Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, GO,
Brasil
| | - Bruno Saciloto
- Clínica Bambina Pontifícia
Universidade Católica do Paraná, Brasil
| | - Allan Ono
- Hospital das Clínicas da Faculdade de
Medicina da Universidade de São Paulo (IOT-HCFMUSP), Instituto de Ortopedia e
Traumatología, Spine Surgery Division, São Paulo, SP, Brazil
| | - Olavo Letaif
- Department of Orthopedics and
Traumatology, IOT HCFMUSP, São Paulo, Brazil
| | - Baron Zarate-Kalfopulos
- AOSpine Latin America Study Group,
Curitiba, Brazil,Instituto Nacional de Rehabilitación,
Distrito Federal, Mexico
| | - Ratko Yurac
- AOSpine Latin America Study Group,
Curitiba, Brazil,Department of Orthopedic and
Traumatology, University del Desarrollo, Santiago, Chile,Spine Unit, Department of
Traumatology, Clínica Alemana, Santiago, Chile
| | - Emiliano Vialle
- AOSpine Latin America Study Group,
Curitiba, Brazil,Cajuru Hospital, Catholic University
of Parana, Caritiba, Brazil
| | - Marcelo Valacco
- AOSpine Latin America Study Group,
Curitiba, Brazil,Hospital Churruca Visca, Buenos Aires,
Argentina
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20
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Covell MM, Rumalla K, Kassicieh AJ, Segura AC, Kazim SF, Schmidt MH, Bowers CA. Frailty measured by risk analysis index and adverse discharge outcomes after adult spine deformity surgery: analysis of 3104 patients from a prospective surgical registry (2011-2020). Spine J 2022; 23:739-745. [PMID: 36572283 DOI: 10.1016/j.spinee.2022.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/15/2022] [Indexed: 12/25/2022]
Abstract
BACKGROUND CONTEXT Measurement of frailty with the Risk Analysis Index (RAI) has demonstrated improved outcome prediction compared to other frailty indices across the surgical literature. However, the generalizability and clinical utility of preoperative RAI scoring for prediction of postoperative morbidity after adult spinal deformity surgery is presently unknown. Thus, recent studies have called for an RAI analysis of spine deformity outcomes. PURPOSE The present study sought to evaluate the discriminatory accuracy of preoperative frailty, as measured by RAI, for predicting postoperative morbidity among adult spine deformity surgery patients using data queried from a large prospective surgical registry representing over 700 hospitals from 49 US states and 11 countries. STUDY DESIGN/SETTING Secondary analysis of a prospective surgical registry. PATIENT SAMPLE American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database (2011-2020). OUTCOME MEASURES The primary endpoint was "adverse discharge outcome" (ADO) defined as discharge to a non-home, non-rehabilitation nursing/chronic care facility. METHODS Adult spine deformity surgeries were queried from the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database (2011-2020) using diagnosis and procedure codes. The relationship between increasing preoperative RAI frailty score and increasing rate of primary endpoint (ADO) was assessed with Cochran-Armitage linear trend tests. Discriminatory accuracy was tested by computation of concordance statistics (with 95% confidence interval [CI]) in receiver operating characteristic (ROC) curve analysis. RESULTS A total of 3,104 patients underwent spine deformity surgery and were stratified by RAI score: 0-10: 22%, 11-15: 11%, 16-20: 29%, 21-25: 26%, 26-30: 8.0%, 31-35: 2.4%, and 36+: 1.4%. The rate of ADO was 14% (N=439/3094). The rate of ADO increased significantly with increasing RAI score (p<.0001). RAI demonstrated robust discriminatory accuracy for prediction of ADO in ROC analysis (C-statistic: 0.71, 95% CI: 0.69-0.74, p<.001). In pairwise comparison of ROC curves (DeLong test), RAI demonstrates superior discriminatory accuracy compared to the 5-factor modified frailty index (mFI-5; p<.001). CONCLUSION Preoperative frailty, as measured by RAI, is a robust predictor of postoperative morbidity (measured by ADO) after adult spine deformity surgery. The frailty score may be translated directly to the bedside with a user-friendly risk calculator, deployed here: https://nsgyfrailtyoutcomeslab.shinyapps.io/spineDeformity.
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Affiliation(s)
| | - Kavelin Rumalla
- Department of Neurosurgery, University of New Mexico Hospital, Albuquerque, NM, USA; Bowers Neurosurgical Frailty and Outcomes Data Science Lab, Albuquerque, NM, USA
| | - Alexander J Kassicieh
- Department of Neurosurgery, University of New Mexico Hospital, Albuquerque, NM, USA; Bowers Neurosurgical Frailty and Outcomes Data Science Lab, Albuquerque, NM, USA
| | - Aaron C Segura
- Department of Neurosurgery, University of New Mexico Hospital, Albuquerque, NM, USA; Bowers Neurosurgical Frailty and Outcomes Data Science Lab, Albuquerque, NM, USA
| | - Syed Faraz Kazim
- Department of Neurosurgery, University of New Mexico Hospital, Albuquerque, NM, USA; Bowers Neurosurgical Frailty and Outcomes Data Science Lab, Albuquerque, NM, USA
| | - Meic H Schmidt
- Department of Neurosurgery, University of New Mexico Hospital, Albuquerque, NM, USA; Bowers Neurosurgical Frailty and Outcomes Data Science Lab, Albuquerque, NM, USA
| | - Christian A Bowers
- Department of Neurosurgery, University of New Mexico Hospital, Albuquerque, NM, USA; Bowers Neurosurgical Frailty and Outcomes Data Science Lab, Albuquerque, NM, USA.
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21
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Wang Y, Huang Y, Zheng G, Zhang X, Wang T, Qi D, Hu W, Xue C, Zhao Y, Mao K, Wang Z. Trans-intervertebral osteotomy classification of posterior spinal corrective osteotomy procedures via the intervertebral space. BRAIN & SPINE 2022; 3:101707. [PMID: 36685706 PMCID: PMC9845419 DOI: 10.1016/j.bas.2022.101707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/01/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
•This is a diagnostic study for a classification for posterior spinal osteotomy procedures via the intervertebral space.•Proposed a novel classification with excellent reliability and validity, differ from the SRS-Schwab osteotomy classification.•Give a novel definition of "trans-intervertebral osteotomy" (TIO) for posterior spinal osteotomy procedures.•Thoroughly discussed about the histories of posterior spinal osteotomy procedures via the intervertebral space.•Systematically introduced the TIO technique with fine original schematics.
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Affiliation(s)
- Yan Wang
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China,Corresponding author.
| | - Yi Huang
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China,Nankai University School of Medicine, Nankai University, Tianjin, 300071, China
| | - GuoQuan Zheng
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Xuesong Zhang
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Tianhao Wang
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Dengbin Qi
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Wenhao Hu
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Chao Xue
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Yongfei Zhao
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Keya Mao
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
| | - Zheng Wang
- Department of Orthopedics, General Hospital of Chinese People's Liberation Army, Beijing, 100853, China
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22
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Quarto E, Zanirato A, Pellegrini M, Vaggi S, Vitali F, Bourret S, Le Huec JC, Formica M. GAP score potential in predicting post-operative spinal mechanical complications: a systematic review of the literature. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2022; 31:3286-3295. [PMID: 36153789 DOI: 10.1007/s00586-022-07386-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 07/18/2022] [Accepted: 09/10/2022] [Indexed: 12/14/2022]
Abstract
PURPOSE In 2017, the GAP score was proposed as a tool to reduce mechanical complications (MC) in adult spinal deformity (ASD) surgery: the reported MC rate for the GAP proportioned category was only 6%, which is clearly lower to the MC rate reported in the literature. The aim of this study is to analyse if the most recent literature confirms the promising results of the original article. MATERIALS AND METHODS Using the PRISMA flow chart, we reviewed the literature to analyse GAP score capacity in predicting MC occurrence. We included articles clearly reporting ASD surgery MC stratified by GAP categories and the score's overall capacity to predict MC using the area under the curve (AUC). The quality of the included studies was evaluated using GRADE and MINORS systems. RESULTS Eleven retrospective articles (1,517 patients in total) were included. The MC distribution per GAP category was as follows: GAP-P, 32.8%; GAP-MD, 42.3%; GAP-SD, 55.4%. No statistically significant difference was observed between the different categories using the Kruskal-Wallis test (p = 0.08) and the two-by-two Pearson-Chi square test (P Vs MD, p = 0.300; P Vs SD, p = 0.275; MD Vs SD, p = 0.137). The global AUC was 0.68 ± 0.2 (moderate accuracy). The included studies were of poor quality according to the GRADE system and had a high risk of bias based on the MINORS criteria. CONCLUSION The actual literature does not corroborate the excellent results reported by the original GAP score article. Further prospective studies, possibly stratified by type of MC and type of surgery, are necessary to validate this score.
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Affiliation(s)
- E Quarto
- Clinica Ortopedica, IRCCS Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy.
| | - A Zanirato
- Clinica Ortopedica, IRCCS Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - M Pellegrini
- Clinica Ortopedica, IRCCS Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - S Vaggi
- Clinica Ortopedica, IRCCS Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - F Vitali
- Clinica Ortopedica, IRCCS Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
| | - S Bourret
- Vertebra, Polyclinique Bordeaux Nord Aquitaine, 15 Rue Boucher, 33300, Bordeaux, France
| | - J C Le Huec
- Vertebra, Polyclinique Bordeaux Nord Aquitaine, 15 Rue Boucher, 33300, Bordeaux, France
| | - M Formica
- Clinica Ortopedica, IRCCS Policlinico San Martino, Largo Rosanna Benzi 10, 16132, Genoa, GE, Italy
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23
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Murata S, Tsutsui S, Hashizume H, Minamide A, Nakagawa Y, Iwasaki H, Takami M, Nagata K, Murakami K, Taiji R, Kozaki T, Yamada H. Importance of physiological age in determining indications for adult spinal deformity surgery in patients over 75 years of age: a propensity score matching analysis. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2022; 31:3060-3068. [PMID: 36098830 DOI: 10.1007/s00586-022-07379-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 08/19/2022] [Accepted: 09/03/2022] [Indexed: 06/15/2023]
Abstract
PURPOSE Physiologically, people age at different rates, which leads to a discrepancy between physiological and chronological age. Physiological age should be a priority when considering the indications for adult spinal deformity (ASD) surgery. The primary objective of this study was to determine the characteristics of the postoperative course, surgical outcomes, and complication rates to extend the healthy life expectancy of older ASD patients (≥ 75 years). The secondary objective was to clarify the importance of physiological age in the surgical treatment of older ASD patients, considering frailty. METHODS A retrospective review of 109 consecutive patients aged ≥ 65 years with symptomatic ASD who underwent a corrective long fusion with lateral interbody fusion from the lower thoracic spine to the pelvis from 2015 to 2019 was conducted. Patients were classified into two groups according to age (group Y [65-74 years], group O [≥ 75 years]) and further divided into four groups according to the ASD-frailty index score (Y-F, Y-NF, O-F, and O-NF groups). To account for potential risk factors for perioperative course characteristics, complication rates, and surgical outcomes, patients from the database were subjected to propensity score matching based on sex, BMI, and preoperative sagittal spinal alignment (C7 sagittal vertical axis, pelvic incidence-lumbar lordosis, and pelvic tilt). Clinical outcomes were evaluated 2 years postoperatively, using three patient-reported outcome measures of health-related quality of life: the Oswestry Disability Index, Scoliosis Research Society questionnaire (SRS-22), and Short Form 36 (SF-36). Additionally, the postoperative time-to-first ambulation, as well as minor, major, and mechanical complications, were evaluated. RESULTS In the comparison between Y and O groups, patients in group O were at a higher risk of minor complications (delirium and urinary tract infection). In contrast, other surgical outcomes of group O were comparable to those of group Y, except for SRS-22 (satisfaction) and time to ambulation after surgery, with better outcomes in Group O. Patients in the O-NF group had better postoperative outcomes (time to ambulation after surgery, SRS-22 (function, self-image, satisfaction), SF-36 [PCS]) than those in the Y-F group. CONCLUSIONS Older age warrants monitoring of minor complications in the postoperative management of patients. However, the outcomes of ASD surgery depended more on frailty than on chronological age. Older ASD patients without frailty might tolerate corrective surgery and have satisfactory outcomes when minimally invasive techniques are used. Physiological age is more important than chronological age when determining the indications for surgery in older patients with ASD.
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Affiliation(s)
- Shizumasa Murata
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Shunji Tsutsui
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan.
| | - Hiroshi Hashizume
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Akihito Minamide
- Spine Center, Dokkyo Medical University Nikko Medical Center, 632 Takatoku, Tochigi, Nikko City, 321-2593, Japan
| | - Yukihiro Nakagawa
- Spine Care Center, Wakayama Medical University Kihoku Hospital, 219 Myoji, Katsuragi-cho, Ito-gun, Wakayama, 649-7113, Japan
| | - Hiroshi Iwasaki
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Masanari Takami
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Keiji Nagata
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Kimihide Murakami
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Ryo Taiji
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Takuhei Kozaki
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
| | - Hiroshi Yamada
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan
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Kim HJ, Yang JH, Chang DG, Lenke LG, Suh SW, Nam Y, Park SC, Suk SI. Adult Spinal Deformity: A Comprehensive Review of Current Advances and Future Directions. Asian Spine J 2022; 16:776-788. [PMID: 36274246 PMCID: PMC9633249 DOI: 10.31616/asj.2022.0376] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/30/2022] Open
Abstract
Owing to rapidly changing global demographics, adult spinal deformity (ASD) now accounts for a significant proportion of the Global Burden of Disease. Sagittal imbalance caused by age-related degenerative changes leads to back pain, neurological deficits, and deformity, which negatively affect the health-related quality of life (HRQoL) of patients. Along with the recognized regional, global, and sagittal spinopelvic parameters, poor paraspinal muscle quality has recently been acknowledged as a key determinant of the clinical outcomes of ASD. Although the Scoliosis Research Society-Schwab ASD classification system incorporates the radiological factors related to HRQoL, it cannot accurately predict the mechanical complications. With the rapid advances in surgical techniques, many surgical options for ASD have been developed, ranging from minimally invasive surgery to osteotomies. Therefore, structured patient-specific management is important in surgical decision-making, selecting the proper surgical technique, and to prevent serious complications in patients with ASD. Moreover, utilizing the latest technologies such as robotic-assisted surgery and machine learning, should help in minimizing the surgical risks and complications in the future.
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Affiliation(s)
- Hong Jin Kim
- Department of Orthopaedic Surgery, Inje University Sanggye Paik Hospital, College of Medicine, Inje University, Seoul, Korea
| | - Jae Hyuk Yang
- Department of Orthopaedic Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Dong-Gune Chang
- Department of Orthopaedic Surgery, Inje University Sanggye Paik Hospital, College of Medicine, Inje University, Seoul, Korea
- Corresponding author: Dong-Gune Chang Spine Center and Department of Orthopaedic Surgery, Inje University Sanggye Paik Hospital, 1342 Dongil-ro, Nowon-gu, Seoul 01757, Korea Tel: +82-2-950-1284, Fax: +82-2-950-1287, E-mail:
| | - Lawrence G. Lenke
- Department of Orthopaedic Surgery, The Daniel and Jane Och Spine Hospital, Columbia University, New York, NY, USA
| | - Seung Woo Suh
- Department of Orthopaedic Surgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Yunjin Nam
- Department of Orthopaedic Surgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Sung Cheol Park
- Department of Orthopaedic Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Se-Il Suk
- Department of Orthopaedic Surgery, Inje University Sanggye Paik Hospital, College of Medicine, Inje University, Seoul, Korea
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25
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Koffie RM, de Andrada Pereira B, Lehrman JN, Godzik J, Sawa AGU, Gandhi SV, Kelly BP, Uribe JS, Turner JD. Influence of Spinal Deformity Construct Design on Adjacent-Segment Biomechanics. World Neurosurg 2022; 166:e656-e663. [PMID: 35872128 DOI: 10.1016/j.wneu.2022.07.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND Adjacent level degeneration is a precursor to construct failure in adult spinal deformity surgery, but whether construct design affects adjacent level degeneration risk remains unclear. Here we present a biomechanical profile of common deformity correction constructs and assess adjacent level biomechanics. METHODS Standard nondestructive flexibility tests (7.5 Nm) were performed on 21 cadaveric specimens: 14 pedicle subtraction osteotomies (PSOs) and 7 anterior column realignment (ACR) constructs. The ranges of motion (ROM) at the adjacent free level in flexion, extension, axial rotation, and lateral bending were measured and analyzed. RESULTS ACR constructs had a lower ROM change on flexion at the proximal adjacent free level than constructs with PSO (1.02 vs. 1.32, normalized to the intact specimen, P < 0.01). Lateral lumbar interbody fusion adjacent to PSO and 4 rods limits ROM at the free level more effectively than transforaminal interbody fusion and 2 rods in correction constructs with PSO. Use of 2 screws to anchor the ACR interbody further decreased ROM at the proximal adjacent free level on flexion, but adding 4 rods in this setting added no further limitation to adjacent segment motion. CONCLUSIONS ACR constructs have less ROM change at the adjacent level compared to PSO constructs. Among constructs with ACR, anchoring the ACR interbody with 2 screws reduces motion at the proximal adjacent free level. When PSOs are used, lateral lumbar interbody fusion adjacent to the PSO level has a greater reduction in adjacent-segment motion than transforaminal interbody fusion, suggesting that deformity construct configuration influences proximal adjacent-segment biomechanics.
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Affiliation(s)
- Robert M Koffie
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Bernardo de Andrada Pereira
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Jennifer N Lehrman
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Jakub Godzik
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Anna G U Sawa
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Shashank V Gandhi
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Brian P Kelly
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Juan S Uribe
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Jay D Turner
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA.
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Cho KJ, Kim KT, Youn YH, Song JS. Pedicle Subtraction Osteotomy in Adult Spinal Deformity: Comparing Fixed Versus Flexible Sagittal Imbalance. Clin Spine Surg 2022; 35:E394-E399. [PMID: 34775390 DOI: 10.1097/bsd.0000000000001273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 09/20/2021] [Indexed: 11/26/2022]
Abstract
STUDY DESIGN/SETTING Level III-retrospective radiologic and clinical comparative study. OBJECTIVE This study compares the results of pedicle subtraction osteotomy (PSO) for fixed versus flexible sagittal imbalance in adult spinal deformity. SUMMARY OF BACKGROUND DATA The result of PSO may be different according to the flexibility of the deformity. METHODS Sixty-one patients who underwent PSO were enrolled with a minimum 2-year follow-up. Twenty-one patients had fixed imbalance resulting from ankylosing spondylitis and iatrogenic flatback deformity, and 40 patients had flexible imbalance resulting from degenerative spinal deformity and posttraumatic kyphosis. RESULTS The mean age was 54.9±9.2 years in the fixed group and 65.9±10.5 years in the flexible group (P<0.01). PSO achieved about 35 degrees of correction of kyphotic angle in both groups, but the loss of correction (LOC) was higher in the flexible group. The correction of Lumbar Lordosis was similar in both groups, at 31.7±15.4 degrees in the fixed group and 32.3±20.8 degrees in the flexible group, although the LOC was also higher in the flexible group than in the fixed group, at 9.8±12.4 and 2.7±3.5 degrees, respectively (P<0.01). The sagittal vertical axis was much more restored in the fixed group than in the flexible group (P=0.002). Postoperative complications were identified in 4 patients in the fixed group, consisting of neurological deficit and screw loosening, and in 15 patients in the flexible group, consisting of proximal junctional kyphosis, screw pullout, rod fracture, and pseudarthrosis. CONCLUSIONS PSO for flexible sagittal imbalance resulted in a higher LOC of the osteotomy angle, Lumbar Lordosis, and sagittal vertical axis relative to the fixed deformity. Furthermore, more complications such as implant failure developed in the flexible group.
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Affiliation(s)
- Kyu-Jung Cho
- Department of Orthopedic Surgery, Inha University Hospital, Incheon
| | - Ki-Tack Kim
- Department of Orthopedic Surgery, School of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Yung-Hun Youn
- Department of Orthopedic Surgery, Inha University Hospital, Incheon
| | - Ju-Sung Song
- Department of Orthopedic Surgery, Inha University Hospital, Incheon
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Kaufmann A, Claus C, Tong D, Hanson C, Carr D, Houseman C, Soo TM. Multilevel Stabilization Screws Prevent Proximal Junctional Failure and Kyphosis in Adult Spinal Deformity Surgery: A Comparative Cohort Study. Oper Neurosurg (Hagerstown) 2022; 22:150-157. [PMID: 35030140 DOI: 10.1227/ons.0000000000000076] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 09/29/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Proximal junctional kyphosis (PJK) and proximal junctional failure (PJF) occurred in up to 40% of patients with adult spinal deformity (ASD) who underwent open thoracolumbar fusion. Proximal stabilization techniques have been investigated to prevent PJK/PJF without conclusive results. OBJECTIVE To demonstrate reductions in PJK/PJF with multilevel stabilization screws (MLSSs). METHODS This observational longitudinal cohort study compares MLSSs with standard instrumentation. We reviewed the charts of consecutive patients with ASD undergoing open thoracolumbar fusion (>3 levels, extending cranially above T6 and caudally below L1) from 2009 to 2017 and were followed for >2 yr postoperatively. We defined PJF using the International Spine Study Group criteria and PJK as a Cobb angle increase >10°. We defined the upper instrumented vertebra as the most cephalad vertebral body with bilateral MLSSs. Confounders, MLSS-specific complications, and radiographic outcomes were collected. We evaluated comparability between groups using univariate analyses. We adjusted for covariates by using multivariable regressions modeling PJF and PJK separately with a P-value < .00625 considered significant after the Bonferroni correction. Sensitivity analysis accounted for those lost to follow-up. RESULTS Seventy-six patients (50 MLSS vs 26 controls) were included. MLSS patients were significantly older (64.5 ± 8.9 vs 54.8 ± 19.9 yr, P = .024) and had significantly lower PJF incidence (10.0% vs 30.8%, P = .023) and less kyphosis (1.3° ± 5.3° vs 5.2° ± 6.3°, P = .014). Multivariable analysis demonstrated a significant independent association between MLSSs and decreased odds of PJF (odds ratio: 0.11, 0.02-0.53, P = .006). Perioperative complications did not significantly differ between cohorts. CONCLUSION MLSSs are safe and efficacious in reducing PJF/PJK in patients with ASD undergoing open thoracolumbar fusion.
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Affiliation(s)
- Ascher Kaufmann
- Division of Neurosurgery, Ascension Providence Hospital, College of Human Medicine, Michigan State University, Southfield, Michigan, USA
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Xu S, Guo C, Liang Y, Zhu Z, Zhang H, Liu H. Posterior instrumented fusion on lumbar stenosis syndrome can bring benefit to proximal degenerative kyphosis: A CONSORT-compliant article. Medicine (Baltimore) 2021; 100:e27711. [PMID: 34766574 PMCID: PMC10545290 DOI: 10.1097/md.0000000000027711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 08/25/2021] [Accepted: 10/19/2021] [Indexed: 11/25/2022] Open
Abstract
ABSTRACT The effect on degenerative thoracolumbar kyphosis (DTLK) after short-segment instrument for lumbar spinal stenosis syndrome (LSS) remains controversial. Based on the biomechanics and compensatory of the global spino-pelvic alignment, it was assumed that the interference on the lumbar spine, instead of the thoracolumbar segment, could still make a difference on the proximal spine.To explore whether DTLK could improve with only surgery for LSS and identify influencing factors on postoperative TLK.The study was performed from January 2016 to December 2018. Sixty-nine participants (25 male) diagnosed LSS with DTLK were enrolled and surgery was only for LSS. Radiological parameters included TLK, lumbar lordosis, pelvic incidence, pelvic tilt, sacral slope, and osteoporosis. Clinical outcomes were visual analogue scale and Oswestry disability index. According to lower instrumented vertebrae (LIV) on L5 or S1, inter-group comparisons were performed between LIV on L5 (L5 group) and S1 (S1 group).Demographics were well-matched between L5 and S1 group with a mean follow-up of 24.3 ± 12.1 (m). TLK improved with a mean of 16.2 ± 7.6 (°) (P < .001). There was no significance on radiological and clinical parameters between L5 and S1 groups except for a larger pelvic tilt in S1 group (P = .046). Visual analogue scale (P = .787) and Oswestry disability index (P = .530) were both indifferent between normal TLK and DTLK at last (P > .05). Postoperative TLK was affected by osteoporosis and sacral slope, the latter was dominated by pelvic incidence and pelvic rotation. Osteoporosis was the risk factor for TLK correction (P = .001, odd risk = 9.58).DTLK decreased if instrument only performed for LSS, where TLK and clinical outcomes are comparably affected whether L5 or S1 is selected as LIV. This study supplements the compensatory mechanism of spino-pelvic alignment, especially for cases with severe osteoporosis.
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Affiliation(s)
- Shuai Xu
- Department of Spinal Surgery, Peking University People's Hospital, Peking University, Beijing, P.R. China
| | - Chen Guo
- Department of Spinal Surgery, Peking University People's Hospital, Peking University, Beijing, P.R. China
| | - Yan Liang
- Department of Spinal Surgery, Peking University People's Hospital, Peking University, Beijing, P.R. China
| | - Zhenqi Zhu
- Department of Spinal Surgery, Peking University People's Hospital, Peking University, Beijing, P.R. China
| | - Hongguang Zhang
- Department of Neurosurgery, Jining Medical College Affiliated Gaotang People's Hospital, Liaocheng, Shandong, P.R. China
| | - Haiying Liu
- Department of Spinal Surgery, Peking University People's Hospital, Peking University, Beijing, P.R. China
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Patel AV, White CA, Schwartz JT, Pitaro NL, Shah KC, Singh S, Arvind V, Kim JS, Cho SK. Emerging Technologies in the Treatment of Adult Spinal Deformity. Neurospine 2021; 18:417-427. [PMID: 34610669 PMCID: PMC8497255 DOI: 10.14245/ns.2142412.206] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/12/2021] [Indexed: 12/29/2022] Open
Abstract
Outcomes for adult spinal deformity continue to improve as new technologies become integrated into clinical practice. Machine learning, robot-guided spinal surgery, and patient-specific rods are tools that are being used to improve preoperative planning and patient satisfaction. Machine learning can be used to predict complications, readmissions, and generate postoperative radiographs which can be shown to patients to guide discussions about surgery. Robot-guided spinal surgery is a rapidly growing field showing signs of greater accuracy in screw placement during surgery. Patient-specific rods offer improved outcomes through higher correction rates and decreased rates of rod breakage while decreasing operative time. The objective of this review is to evaluate trends in the literature about machine learning, robot-guided spinal surgery, and patient-specific rods in the treatment of adult spinal deformity.
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Affiliation(s)
- Akshar V Patel
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Christopher A White
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - John T Schwartz
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Nicholas L Pitaro
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kush C Shah
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sirjanhar Singh
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Varun Arvind
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jun S Kim
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Samuel K Cho
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Rabinovich EP, Buell TJ, Sardi JP, Lazaro BCR, Shaffrey CI, Smith JS. A Novel Weave Tether Technique for Proximal Junctional Kyphosis Prevention in 71 Adult Spinal Deformity Patients: A Preliminary Case Series Assessing Early Complications and Efficacy. Oper Neurosurg (Hagerstown) 2021; 21:393-399. [PMID: 34467979 DOI: 10.1093/ons/opab305] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 07/02/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Proximal junctional kyphosis (PJK) rates may be as high as 69.4% after adult spinal deformity (ASD) surgery. PJK is one of the greatest unsolved challenges in long-segment fusions for ASD and remains a common indication for costly and impactful revision surgery. Junctional tethers may help to reduce the occurrence of PJK by attenuating adjacent-segment stress. OBJECTIVE To report our experience and assess early safety associated with a novel "weave-tether technique" (WTT) for PJK prophylaxis in a large series of patients. METHODS This single-center retrospective study evaluated consecutive patients who underwent ASD surgery including WTT between 2017 and 2018. Patient demographics, operative details, standard radiographic measurements, and complications were analyzed. RESULTS A total of 71 patients (mean age 66 ± 12 yr, 65% women) were identified. WTT included application to the upper-most instrumented vertebrae (UIV) + 1 and UIV + 2 in 38(53.5%) and 33(46.5%) patients, respectively. No complications directly attributed to WTT usage were identified. For patients with radiographic follow-up (96%; mean duration 14 ± 12 mo), PJK occurred in 15% (mean 1.8 ± 1.0 mo postoperatively). Proximal junctional angle increased an average 4° (10° to 14°, P = .004). Rates of symptomatic PJK and revision for PJK were 8.8% and 2.9%, respectively. CONCLUSION Preliminary results support the safety of the WTT for PJK prophylaxis. Approximately 15% of patients developed radiographic PJK, no complications were directly attributed to WTT usage, and the revision rate for PJK was low. These early results warrant future research to assess longer-term efficacy of the WTT for PJK prophylaxis in ASD surgery.
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Affiliation(s)
- Emily P Rabinovich
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Thomas J Buell
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Juan P Sardi
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Bruno C R Lazaro
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia, USA
| | - Christopher I Shaffrey
- Department of Neurosurgery, Duke University Medical Center, Durham, North Carolina, USA.,Department of Orthopedic Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Justin S Smith
- Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia, USA
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Smith JS, Shaffrey CI, Baldus CR, Kelly MP, Yanik EL, Lurie JD, Ames CP, Bess S, Schwab FJ, Bridwell KH. Orthopedic disease burden in adult patients with symptomatic lumbar scoliosis: results from a prospective multicenter study. J Neurosurg Spine 2021; 35:743-751. [PMID: 34416734 DOI: 10.3171/2021.1.spine201911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 01/05/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Although the health impact of adult symptomatic lumbar scoliosis (ASLS) is substantial, these patients often have other orthopedic problems that have not been previously quantified. The objective of this study was to assess disease burden of other orthopedic conditions in patients with ASLS based on a retrospective review of a prospective multicenter cohort. METHODS The ASLS-1 study is an NIH-sponsored prospective multicenter study designed to assess operative versus nonoperative treatment for ASLS. Patients were 40-80 years old with ASLS, defined as a lumbar coronal Cobb angle ≥ 30° and Oswestry Disability Index ≥ 20, or Scoliosis Research Society-22 questionnaire score ≤ 4.0 in pain, function, and/or self-image domains. Nonthoracolumbar orthopedic events, defined as fractures and other orthopedic conditions receiving surgical treatment, were assessed from enrollment to the 4-year follow-up. RESULTS Two hundred eighty-six patients (mean age 60.3 years, 90% women) were enrolled, with 173 operative and 113 nonoperative patients, and 81% with 4-year follow-up data. At a mean (± SD) follow-up of 3.8 ± 0.9 years, 104 nonthoracolumbar orthopedic events were reported, affecting 69 patients (24.1%). The most common events were arthroplasty (n = 38), fracture (n = 25), joint ligament/cartilage repair (n = 13), and cervical decompression/fusion (n = 7). Based on the final adjusted model, patients with a nonthoracolumbar orthopedic event were older (HR 1.44 per decade, 95% CI 1.07-1.94), more likely to have a history of tobacco use (HR 1.63, 95% CI 1.00-2.66), and had worse baseline leg pain scores (HR 1.10, 95% CI 1.01-1.19). CONCLUSIONS Patients with ASLS have high orthopedic disease burden, with almost 25% having a fracture or nonthoracolumbar orthopedic condition requiring surgical treatment during the mean 3.8 years following enrollment. Comparisons with previous studies suggest that the rate of total knee arthroplasty was considerably greater and the rates of total hip arthroplasty were at least as high in the ASLS-1 cohort compared with the similarly aged general US population. These conditions may further impact health-related quality of life and outcomes assessments of both nonoperative and operative treatment approaches in patients with ASLS.
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Affiliation(s)
- Justin S Smith
- 1Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Christopher I Shaffrey
- 2Departments of Neurosurgery and Orthopedic Surgery, Duke University Medical Center, Durham, North Carolina
| | - Christine R Baldus
- 3Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Michael P Kelly
- 3Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Elizabeth L Yanik
- 3Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Jon D Lurie
- 4Department of Medicine, Dartmouth Medical School, Hanover, New Hampshire
| | - Christopher P Ames
- 5Department of Neurosurgery, University of California, San Francisco, California
| | - Shay Bess
- 6Denver International Spine Center, Presbyterian St. Luke's/Rocky Mountain Hospital for Children, Denver, Colorado; and
| | | | - Keith H Bridwell
- 3Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
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Abstract
The exponential evolution of technology and the growth of the elderly population are two phenomena that will inevitably interact with increasing frequency in the future. This paper analyses scientific literature as a means of furthering progress in sustainable technology for senior living. We carried out a bibliometric analysis of papers published in this area and compiled by the Web of Science (WOS) and Scopus, examining the main participants and advances in the field from 2000 to the first quarter of 2021. The study describes some interesting research projects addressing three different aspects of older adults’ daily lives—health, daily activities and wellbeing—and policies to promote healthy aging and improve the sustainability of the healthcare system. It also looks at lines of research into transversal characteristics of technology. Our analysis showed that publications mentioning sustainability technologies for older adults have been growing progressively since the 2000s, but that the big increase in the number of research works in this area took place during the period 2016–2021. These more recent works show a tendency to study those factors that improve healthy aging, ensure the social inclusion of the elderly through technology and prolong the time in which they can live independent lives thanks to smart environments. Current research gaps in the literature are also discussed.
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Kitchen elbow sign predicts surgical outcomes in adults with spinal deformity: a retrospective cohort study. Sci Rep 2021; 11:12859. [PMID: 34145338 PMCID: PMC8213796 DOI: 10.1038/s41598-021-92520-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 06/11/2021] [Indexed: 11/09/2022] Open
Abstract
Kitchen elbow sign (KE-Sign) is a skin abnormality on the extensor side of the elbow and forearm that is often observed in patients with adult spinal deformity (ASD). The significance of KE-Sign in surgical cases was investigated. Overall, 114 patients with ASD treated with long spinal fusion were reviewed and divided into KE-Sign positive and negative groups. The preoperative and 1-year follow-up evaluations included radiographic parameters [C7 sagittal vertical axis (SVA), pelvic incidence (PI) and lumbar lordosis (LL)], the Oswestry Disability Index (ODI), visual analogue scales (VASs) for low back pain, leg pain, and satisfaction, and Short Form 36 questionnaire (SF-36). Multi-regression analysis was performed to identify patient satisfaction predictors and improvement in the ODI as dependent variables and preoperative background factors as independent variables. Preoperative characteristics showed no significant difference between both groups. Improvement in the ODI and VAS for satisfaction were significantly superior in the KE-Sign positive group. In multiple regression analysis, KE-Sign and preoperative ODI were significantly associated with improvement in the ODI; age, KE-Sign, preoperative low back pain VAS, and leg pain VAS were significantly associated with satisfaction. KE-Sign can be a predictor of better surgical outcomes in ASD patients.
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Schwartz JT, Cho BH, Tang P, Schefflein J, Arvind V, Kim JS, Doshi AH, Cho SK. Deep Learning Automates Measurement of Spinopelvic Parameters on Lateral Lumbar Radiographs. Spine (Phila Pa 1976) 2021; 46:E671-E678. [PMID: 33273436 DOI: 10.1097/brs.0000000000003830] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Cross-sectional database study. OBJECTIVE The objective of this study was to develop an algorithm for the automated measurement of spinopelvic parameters on lateral lumbar radiographs with comparable accuracy to surgeons. SUMMARY OF BACKGROUND DATA Sagittal alignment measurements are important for the evaluation of spinal disorders. Manual measurement methods are time-consuming and subject to rater-dependent error. Thus, a need exists to develop automated methods for obtaining sagittal measurements. Previous studies of automated measurement have been limited in accuracy, inapplicable to common plain films, or unable to measure pelvic parameters. METHODS Images from 816 patients receiving lateral lumbar radiographs were collected sequentially and used to develop a convolutional neural network (CNN) segmentation algorithm. A total of 653 (80%) of these radiographs were used to train and validate the CNN. This CNN was combined with a computer vision algorithm to create a pipeline for the fully automated measurement of spinopelvic parameters from lateral lumbar radiographs. The remaining 163 (20%) of radiographs were used to test this pipeline. Forty radiographs were selected from the test set and manually measured by three surgeons for comparison. RESULTS The CNN achieved an area under the receiver-operating curve of 0.956. Algorithm measurements of L1-S1 cobb angle, pelvic incidence, pelvic tilt, and sacral slope were not significantly different from surgeon measurement. In comparison to criterion standard measurement, the algorithm performed with a similar mean absolute difference to spine surgeons for L1-S1 Cobb angle (4.30° ± 4.14° vs. 4.99° ± 5.34°), pelvic tilt (2.14° ± 6.29° vs. 1.58° ± 5.97°), pelvic incidence (4.56° ± 5.40° vs. 3.74° ± 2.89°), and sacral slope (4.76° ± 6.93° vs. 4.75° ± 5.71°). CONCLUSION This algorithm measures spinopelvic parameters on lateral lumbar radiographs with comparable accuracy to surgeons. The algorithm could be used to streamline clinical workflow or perform large scale studies of spinopelvic parameters.Level of Evidence: 3.
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Affiliation(s)
- John T Schwartz
- Department of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Brian H Cho
- Department of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Peter Tang
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Javin Schefflein
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Varun Arvind
- Department of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Jun S Kim
- Department of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Amish H Doshi
- Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Samuel K Cho
- Department of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY
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Smith JS, Kelly MP, Yanik EL, Baldus CR, Buell TJ, Lurie JD, Edwards C, Glassman SD, Lenke LG, Boachie-Adjei O, Buchowski JM, Carreon LY, Crawford CH, Errico TJ, Lewis SJ, Koski T, Parent S, Lafage V, Kim HJ, Ames CP, Bess S, Schwab FJ, Shaffrey CI, Bridwell KH. Operative versus nonoperative treatment for adult symptomatic lumbar scoliosis at 5-year follow-up: durability of outcomes and impact of treatment-related serious adverse events. J Neurosurg Spine 2021; 35:67-79. [PMID: 33930859 PMCID: PMC10193499 DOI: 10.3171/2020.9.spine201472] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 09/21/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Although short-term adult symptomatic lumbar scoliosis (ASLS) studies favor operative over nonoperative treatment, longer outcomes are critical for assessment of treatment durability, especially for operative treatment, because the majority of implant failures and nonunions present between 2 and 5 years after surgery. The objectives of this study were to assess the durability of treatment outcomes for operative versus nonoperative treatment of ASLS, to report the rates and types of associated serious adverse events (SAEs), and to determine the potential impact of treatment-related SAEs on outcomes. METHODS The ASLS-1 (Adult Symptomatic Lumbar Scoliosis-1) trial is an NIH-sponsored multicenter prospective study to assess operative versus nonoperative ASLS treatment. Patients were 40-80 years of age and had ASLS (Cobb angle ≥ 30° and Oswestry Disability Index [ODI] ≥ 20 or Scoliosis Research Society [SRS]-22 subscore ≤ 4.0 in the Pain, Function, and/or Self-Image domains). Patients receiving operative and nonoperative treatment were compared using as-treated analysis, and the impact of related SAEs was assessed. Primary outcome measures were ODI and SRS-22. RESULTS The 286 patients with ASLS (107 with nonoperative treatment, 179 with operative treatment) had 2-year and 5-year follow-up rates of 90% (n = 256) and 74% (n = 211), respectively. At 5 years, compared with patients treated nonoperatively, those who underwent surgery had greater improvement in ODI (mean difference -15.2 [95% CI -18.7 to -11.7]) and SRS-22 subscore (mean difference 0.63 [95% CI 0.48-0.78]) (p < 0.001), with treatment effects (TEs) exceeding the minimum detectable measurement difference (MDMD) for ODI (7) and SRS-22 subscore (0.4). TEs at 5 years remained as favorable as 2-year TEs (ODI -13.9, SRS-22 0.52). For patients in the operative group, the incidence rates of treatment-related SAEs during the first 2 years and 2-5 years after surgery were 22.38 and 8.17 per 100 person-years, respectively. At 5 years, patients in the operative group who had 1 treatment-related SAE still had significantly greater improvement, with TEs (ODI -12.2, SRS-22 0.53; p < 0.001) exceeding the MDMD. Twelve patients who received surgery and who had 2 or more treatment-related SAEs had greater improvement than nonsurgically treated patients based on ODI (TE -8.34, p = 0.017) and SRS-22 (TE 0.32, p = 0.029), but the SRS-22 TE did not exceed the MDMD. CONCLUSIONS The significantly greater improvement of operative versus nonoperative treatment for ASLS at 2 years was durably maintained at the 5-year follow-up. Patients in the operative cohort with a treatment-related SAE still had greater improvement than patients in the nonoperative cohort. These findings have important implications for patient counseling and future cost-effectiveness assessments.
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Affiliation(s)
- Justin S. Smith
- Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Michael P. Kelly
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Elizabeth L. Yanik
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Christine R. Baldus
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Thomas J. Buell
- Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Jon D. Lurie
- Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
| | | | | | - Lawrence G. Lenke
- Department of Orthopedic Surgery, Columbia University, New York, New York
| | | | - Jacob M. Buchowski
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | | | | | - Thomas J. Errico
- Department of Orthopedic Surgery, Nicklaus Children's Hospital, Miami, Florida
| | - Stephen J. Lewis
- UHN-Orthopedics, University of Toronto, Toronto Western Hospital, Toronto, Ontario, Canada
| | - Tyler Koski
- Department of Neurological Surgery, Northwestern University, Chicago, Illinois
| | - Stefan Parent
- Sainte-Justine University Hospital, Montréal, Quebec, Canada
| | | | - Han Jo Kim
- Hospital for Special Surgery, New York, New York
| | - Christopher P. Ames
- Department of Neurosurgery, University of California, San Francisco, California
| | - Shay Bess
- Denver International Spine Center, Presbyterian St. Luke's/Rocky Mountain Hospital for Children, Denver, Colorado; and
| | | | - Christopher I Shaffrey
- Departments of Neurosurgery and Orthopedic Surgery, Duke University, Durham, North Carolina
| | - Keith H Bridwell
- Department of Orthopedic Surgery, Washington University School of Medicine, St. Louis, Missouri
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Abstract
STUDY DESIGN Review article. OBJECTIVE A review of the literature evaluating the cost-effectiveness of undergoing adult spinal deformity surgery and potential avenues for reducing costs. METHODS A review of the current literature and synthesis of data to provide an update on the cost effectiveness of undergoing adult spinal deformity surgery. RESULTS Compared with nonoperative management, operative management for adult spinal deformity is associated with improved patient-reported outcomes and quality of life; however, it is associated with significant financial and resource use. CONCLUSION Operative management for adult spinal deformity has been shown to be effective but is associated with significant cost and resource utilization. The optimal operative treatment is highly dependent on the patients' symptomatology and is surgeon dependent. Maximizing preoperative surgical health and minimizing postoperative complications are key measures in reducing the cost and resource utilization of adult spinal deformity surgery. Future studies are needed to evaluate how to optimize the cost-effectiveness.
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Affiliation(s)
- Anthony M. Alvarado
- University of Kansas Medical Center, Kansas City, KS, USA,Anthony M. Alvarado, Department of Neurosurgery, University of Kansas Medical Center, 3901 Rainbow Boulevard, MS 2021, Kansas City, KS 66160, USA.
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Varshneya K, Pangal DJ, Stienen MN, Ho AL, Fatemi P, Medress ZA, Herrick DB, Desai A, Ratliff JK, Veeravagu A. Postoperative Complication Burden, Revision Risk, and Health Care Use in Obese Patients Undergoing Primary Adult Thoracolumbar Deformity Surgery. Global Spine J 2021; 11:345-350. [PMID: 32875891 PMCID: PMC8013946 DOI: 10.1177/2192568220904341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN This is a retrospective cohort study using a nationally representative administrative database. OBJECTIVE To identify the impact of obesity on postoperative outcomes in patients undergoing thoracolumbar adult spinal deformity (ASD) surgery. BACKGROUND The obesity rate in the United States remains staggering, with approximately one-third of all Americans being overweight or obese. However, the impact of elevated body mass index on spine surgery outcomes remains unclear. METHODS We queried the MarketScan database to identify patients who were diagnosed with a spinal deformity and underwent ASD surgery from 2007 to 2016. Patients were then stratified by whether or not they were diagnosed as obese at index surgical admission. Propensity score matching (PSM) was then utilized to mitigate intergroup differences between obese and nonobese patients. Patients <18 years and those with any prior history of trauma or tumor were excluded from this study. Baseline demographics and comorbidities, postoperative complication rates, and short- and long-term reoperation rates were determined. RESULTS A total of 7423 patients met the inclusion criteria of this study, of whom 597 (8.0%) were obese. Initially, patients with obesity had a higher 90-day postoperative complication rate than nonobese patients (46.1% vs 40.8%, P < .05); however, this difference did not remain after PSM. Revision surgery rates after 2 years were similar across the 2 groups following primary surgery (obese, 21.4%, vs nonobese, 22.0%; P = .7588). Health care use occurred at a higher rate among obese patients through 2 years of long-term follow-up (obese, $152 930, vs nonobese, $140 550; P < .05). CONCLUSION Patients diagnosed with obesity who underwent ASD surgery did not demonstrate increased rates of complications, reoperations, or readmissions. However, overall health care use through 2 years of follow-up after index surgery was higher in the obesity cohort.
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Affiliation(s)
| | | | - Martin N. Stienen
- Stanford University School of Medicine, Stanford, CA, USA,University of Zurich, Zurich, Switzerland
| | - Allen L. Ho
- Stanford University School of Medicine, Stanford, CA, USA
| | | | | | | | - Atman Desai
- Stanford University School of Medicine, Stanford, CA, USA
| | | | - Anand Veeravagu
- Stanford University School of Medicine, Stanford, CA, USA,Anand Veeravagu, Department of Neurosurgery, Stanford University, 300 Pasteur Drive, Edwards Bldg, R281, Stanford, CA 94305, USA.
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Shuman WH, Chapman EK, Gal JS, Neifert SN, Martini ML, Schupper AJ, Lamb CD, McNeill IT, Gilligan J, Caridi JM. Surgery for spinal deformity: non-elective admission status is associated with higher cost of care and longer length of stay. Spine Deform 2021; 9:373-379. [PMID: 33006745 DOI: 10.1007/s43390-020-00215-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/21/2020] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Surgery is commonly indicated for adult spinal deformity. Annual rates and costs of spinal deformity surgery have both increased over the past two decades. However, the impact of non-elective status on total cost of hospitalization and patient outcomes has not been quantified. OBJECTIVE To evaluate the impact of admission status on patient outcomes and healthcare costs in spinal deformity surgery. METHODS All patients who underwent spinal deformity surgery at a single institution between 2008 and 2016 were grouped by admission status: elective, emergency (ED), or transferred. Demographics were compared by univariate analysis. Cost of care and length of stay (LOS) were compared between admission statuses using multivariable linear regression with elective admissions as reference. Multivariate logistic regression was utilized to assess in-hospital complications, discharge destination, and readmission rates. RESULTS There were 427 spinal deformity surgeries included in this study. Compared to elective patients, ED patients had higher Elixhauser Comorbidity Index scores (p < 0.0001), longer LOS (+ 10.9 days, 97.5% CI 6.1-15.6 days, p < 0.0001), and higher costs (+ $20,076, 97.5% CI $9,073-$31,080, p = 0.0008). Transferred patients had significantly higher Elixhauser scores (p = 0.0002), longer LOS (+ 8.8 days, 97.5% CI 3.0-14.7 days, p < 0.0001), and higher rates of non-home discharge (OR = 15.8, 97.5% CI 2.3-110.0, p = 0.001). CONCLUSION Patients admitted from the ED undergoing spinal deformity surgery had significantly higher cost of care and longer LOS compared to elective patients. Transferred patients had significantly longer LOS and a higher rate of non-home discharge compared to elective patients.
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Affiliation(s)
- William H Shuman
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA.
| | - Emily K Chapman
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
| | - Jonathan S Gal
- Department of Anesthesiology, Perioperative, and Pain Medicine, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, New York, NY, USA
| | - Sean N Neifert
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
| | - Michael L Martini
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
| | - Alexander J Schupper
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
| | - Colin D Lamb
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
| | - Ian T McNeill
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
| | - Jeffrey Gilligan
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
| | - John M Caridi
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, Mount Sinai Health System, 50 East 98th St, Apartment 7D-4, New York, NY, 10029, USA
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Representative dynamic ranges of spinal alignment during gait in patients with mild and severe adult spinal deformities. Spine J 2021; 21:518-527. [PMID: 32966908 DOI: 10.1016/j.spinee.2020.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Surgical correction strategies for adult spinal deformity (ASD) relies heavily on radiographic alignment goals, however, there is often debate regarding degree of correction and how static alignment translates to physical ability in daily life. Kinematic analysis has the potential to improve the concept of ideal spinal alignment by providing clinically meaningful estimates of dynamic changes in spinal alignment during activities of daily life. PURPOSE Estimate representative dynamic ranges of spinal alignment during gait among ASD patients using 3D motion tracking; compare dynamic alignment between mild and severe deformity patients and to healthy adults. STUDY DESIGN/SETTING Retrospective review at a single institution. PATIENT SAMPLE Fifty-two ASD patients and 46 healthy adults. OUTCOME MEASURES Radiographic alignment, kinematic spine motion, spatiotemporal gait measures, patient reported outcomes (VAS pain, ODI, SRS-22r). METHODS Spinal alignment was assessed radiographically and during standing and overground walking tests. Dynamic alignment was initialized by linking radiographic alignment to kinematic alignment during standing and at initial heel contact during gait. Dynamic changes in maximums and minimums during gait were made relative to initial heel contact for each gait cycle. Total range-of-motion (RoM) was measured for both ASD and healthy subjects. Dynamic alignment measures included coronal and sagittal vertical axes (CVA, SVA), T1 pelvic angle (TPA), lumbar lordosis (LL), and pelvic tilt (PT). ASD patient's deformities were classified as either Mild or Severe based on the SRS-Schwab ASD classification. RESULTS Severe ASD patients had significantly larger dynamic maximum and minimums for SVA, TPA, LL, and PT (all p<.05) compared with Mild ASD patients. ASD patients exhibited little difference in dynamic alignment compared with healthy subjects. Only PT had a significant difference in dynamic RoM compared with healthy (p<.001). CONCLUSIONS Mild and Severe ASD patients exhibited similar global dynamic alignment measures during gait and had comparable RoM to healthy subjects except with greater PT and reduced spatiotemporal performance which may be key compensatory mechanisms for dynamic stabilization.
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Lee KY, Lee JH, Kang KC, Im SK, Lim HS, Choi SW. Strategies for prevention of rod fracture in adult spinal deformity: cobalt chrome rod, accessory rod technique, and lateral lumbar interbody fusion. J Neurosurg Spine 2021:1-10. [PMID: 33607617 DOI: 10.3171/2020.8.spine201037] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/18/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Restoring the proper sagittal alignment in adult spinal deformity (ASD) can improve radiological and clinical outcomes, but pseudarthrosis including rod fracture (RF) is a common problematic complication. The purpose of this study was to analyze the methods for reducing the incidence of RF in deformity correction of ASD. METHODS The authors retrospectively selected 178 consecutive patients (mean age 70.8 years) with lumbar degenerative kyphosis (LDK) who underwent deformity correction with a minimum 2-year follow-up. Patients were classified into the non-RF group (n = 131) and the RF group (n = 47). For predicting the crucial factors of RF, patient factors, radiographic parameters, and surgical factors were analyzed. RESULTS The overall incidence of RF was 26% (47/178 cases), occurring in 42% (42/100 cases) of pedicle subtraction osteotomy (PSO), 7% (5/67 cases) of lateral lumbar interbody fusion (LLIF) with posterior column osteotomy, 18% (23/129 cases) of cobalt chrome rods, 49% (24/49 cases) of titanium alloy rods, 6% (2/36 cases) placed with the accessory rod technique, and 32% (45/142 cases) placed with the 2-rod technique. There were no significant differences in the incidence of RF regarding patient factors between two groups. While both groups showed severe sagittal imbalance before operation, lumbar lordosis (LL) was more kyphotic and pelvic incidence (PI) minus LL (PI-LL) mismatch was greater in the RF group (p < 0.05). Postoperatively, while LL and PI-LL did not show significant differences between the two groups, LL and sagittal vertical axis correction were greater in the RF group (p < 0.05). Nonetheless, at the last follow-up, the two groups did not show significant differences in radiographic parameters except thoracolumbar junctional angles. As for surgical factors, use of the cobalt chrome rod and the accessory rod technique was significantly greater in the non-RF group (p < 0.05). As for the correction method, PSO was associated with more RFs than the other correction methods, including LLIF (p < 0.05). By logistic regression analysis, PSO, preoperative PI-LL mismatch, and the accessory rod technique were crucial factors for RF. CONCLUSIONS Greater preoperative sagittal spinopelvic malalignment including preoperative PI-LL mismatch was the crucial risk factor for RF in LDK patients 65 years or older. For restoring and maintaining sagittal alignment, use of the cobalt chrome rod, accessory rod technique, or LLIF was shown to be effective for reducing RF in ASD surgery.
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Boddapati V, Lombardi JM, Urakawa H, Lehman RA. Intraoperative image guidance for the surgical treatment of adult spinal deformity. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:91. [PMID: 33553384 PMCID: PMC7859785 DOI: 10.21037/atm-20-2765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Operative management of adult spinal deformity (ASD) has been increasing in recent years secondary to an aging society. The advance of intraoperative image guidance, such as the development of navigation and robotics systems has contributed to the growth and safety of ASD surgery. Currently, intraoperative image guidance is mainly used for pedicle screw placement and the evaluation of alignment correction in ASD surgery. Though it is expected that the use of navigation and robotics would result in increasing pedicle screw accuracy as reported in other spine surgeries, there are no well-powered studies specifically focusing on ASD surgery. Currently, deformity correction relies heavily on preoperative planning, however, a few studies have shown the possibility that intraoperative image modalities may accurately predict postoperative spinopelvic parameters. Future developments of intraoperative image guidance are needed to overcome the remaining challenges in ASD surgery such as radiation exposure to patient and surgeon. More novel imaging modalities may result in evolution in ASD surgery. Overall there is a paucity of literature focusing on intraoperative image guidance in ASD surgery, therefore, further studies are warranted to assess the efficacy of intraoperative image guidance in ASD surgery. This narrative review sought to provide the current role and future perspectives of intraoperative image guidance focusing on ASD surgery.
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Affiliation(s)
- Venkat Boddapati
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, New York, NY, USA
| | - Joseph M Lombardi
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, New York, NY, USA
| | | | - Ronald A Lehman
- The Spine Hospital, New York-Presbyterian/Columbia University Irving Medical Center, New York, NY, USA
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Kim HJ, Yang JH, Chang DG, Suk SI, Suh SW, Song KS, Park JB, Cho W. Adult Spinal Deformity: Current Concepts and Decision-Making Strategies for Management. Asian Spine J 2020; 14:886-897. [PMID: 33254357 PMCID: PMC7788366 DOI: 10.31616/asj.2020.0568] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 01/05/2023] Open
Abstract
Adult spinal deformity (ASD) is characterized by three-dimensional abnormalities of the thoracic or thoracolumbar spine that exerts significant impacts on the health-related quality of life (HRQoL). With the important effects that deformity of the sagittal plane exerts on the HRQoL, there have been paradigm shifts in ASD evaluation and management. Loss of lumbar lordosis is recognized as a key driver of ASD followed by reducing kyphosis, pelvic retroversion, and knee flexion. The Scoliosis Research Society (SRS)– Schwab classification reflects the sagittal spinopelvic parameters that correlate pain and disability in ASD patients. Although the SRS–Schwab classification provides a realignment target framework for surgeons, a structured patient-specific systemic approach is crucial for the process of decision-making. ASD management should be focused on restoring age-specific harmonious alignment and should consider the comorbidities and risk factors of each patient to prevent catastrophic complications and enhance the HRQoL.
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Affiliation(s)
- Hong Jin Kim
- Department of Orthopaedic Surgery, Inje University Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Jae Hyuk Yang
- Department of Orthopaedic Surgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Dong-Gune Chang
- Department of Orthopaedic Surgery, Inje University Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Se-Il Suk
- Department of Orthopaedic Surgery, Inje University Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Seung Woo Suh
- Department of Orthopaedic Surgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Kwang-Sup Song
- Department of Orthopaedic Surgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - Jong-Beom Park
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Woojin Cho
- Department of Orthopaedic Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
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Mar DE, Clary SJ, Ansley B, Bunch JT, Burton DC, McIff TE. Biomechanics of prophylactic tethering for proximal junctional kyphosis: effects of cyclic loading on tether strength and failure properties. Spine Deform 2020; 8:863-870. [PMID: 32249406 DOI: 10.1007/s43390-020-00111-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 03/25/2020] [Indexed: 10/24/2022]
Abstract
STUDY DESIGN Biomechanical evaluation of woven polyester tethers. OBJECTIVES To quantify changes in tether elongation, stiffness, and failure characteristics after cyclic loading. Ligamentous augmentation is gaining interest as a technique to prevent proximal junctional kyphosis (PJK) in adult spinal fusions. There are a lack of data regarding the effects of cyclic loading on polyester tether mechanical properties. Tether stretch may lead to loss of stabilization and increased risk of tether failure. Biomechanical data are needed to determine the effects of cyclic loading on tether integrity. METHODS Testing was done in two materials: (1) a synthetic cortical bone composite to determine baseline mechanical properties, and (2) nine cadaveric L1 spinous processes. 5 mm woven polyester tethers were looped through 2.5 mm holes drilled in each material. First, five tethers were tested directly to failure in the synthetic bone to establish baseline failure properties. Next, tethers were tested at one of the three cyclic load ranges [5%, 25%, and 50% (n = 5 each) of baseline failure] for 1000 cycles and then loaded to failure. Cadaveric tests were done at the 25% range and compared to synthetic bone tests at the same range. Cadaveric failure tests were classified as either tether failure or spinous process bone failure. RESULTS Greater cyclic loading range had a significant effect on tether loop elongation, increased stiffness, and decreased ultimate tensile force. Among the cadaveric failure tests, 56% resulted in tether failure and the remaining 44% resulted in bone failure. CONCLUSIONS Polyester tethers stretch significantly when loaded to physiological ranges. Anticipation of tether stretch may be an important consideration for a tethering strategy to prevent PJK. Improved understanding of tether material properties can provide guidance for the evaluation of clinical outcomes associated with techniques to reduce the risk of PJK caused by ligamentous laxity. LEVEL OF EVIDENCE Biomechanical study.
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Affiliation(s)
| | - Steven J Clary
- Department of Orthopedic Surgery, University of Kansas Medical Center, 3901 Rainbow Boulevard, Mail Stop 3031, Kansas City, KS, 66160, USA
| | - Brant Ansley
- Department of Orthopedic Surgery, University of Kansas Medical Center, 3901 Rainbow Boulevard, Mail Stop 3031, Kansas City, KS, 66160, USA
| | - Joshua T Bunch
- Department of Orthopedic Surgery, University of Kansas Medical Center, 3901 Rainbow Boulevard, Mail Stop 3031, Kansas City, KS, 66160, USA
| | - Douglas C Burton
- Department of Orthopedic Surgery, University of Kansas Medical Center, 3901 Rainbow Boulevard, Mail Stop 3031, Kansas City, KS, 66160, USA.
| | - Terence E McIff
- Department of Orthopedic Surgery, University of Kansas Medical Center, 3901 Rainbow Boulevard, Mail Stop 3031, Kansas City, KS, 66160, USA
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Haddas R, Kisinde S, Mar D, Lieberman I. Does improved radiographic alignment truly enhance dynamic functional balance? Spine Deform 2020; 8:685-694. [PMID: 32065379 DOI: 10.1007/s43390-020-00089-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 01/07/2020] [Indexed: 10/25/2022]
Abstract
STUDY DESIGN Prospective concurrent cohort study. OBJECTIVE To establish the relationship between radiographic alignment parameters and functional CoE measurements at 1 week before and at 3 months after realignment surgery in ADS patients. Adult degenerative scoliosis (ADS) represents a significant healthcare burden with exceedingly high and increasing prevalence, particularly among the elderly. Radiographic alignment measures and patient-reported outcomes currently serve as the standard means to assess spinal alignment, deformity, and stability. Neurological examinations have served as qualitative measures for indicating muscle strength, motor deficits, and gait abnormalities. Three-dimensional motion analysis is increasingly being used to identify and measure gait and balance instability. Recently, techniques have been established to quantify balance characteristics described by Dubousset as the "cone of economy" (CoE). The relationship between radiographic alignment parameters and CoE balance measures of ADS patients before and after realignment surgery is currently unknown. PATIENT SAMPLE 29 ADS patients treated with realignment surgery. METHODS Patients were evaluated at 1 week before realignment surgery and at their 3-month follow-up examination. During each evaluation, patients completed self-reported outcomes (visual analog scales for pain, Oswestry Disability Index, SRS22r) and a functional balance test. Mean changes in dependent measures from before to after surgery were compared using paired t tests. Pearson correlations were used to test for significant correlations between changes in radiographic and CoE measures. RESULTS Significant improvements were found for all patient-reported outcomes, in several radiographic measures, and in CoE measures. Improvements of scoliosis Cobb angle, coronal pelvic tilt, lumbar lordosis, and thoracic kyphosis showed significant correlations with CoE sway and total distance measures at both the center of mass and center of the head. CONCLUSION Improved radiographic alignment measures significantly correlated with improved CoE balance measures among ADS patients treated with realignment surgery at their three-month follow-up. These findings indicate that functional balance evaluations when used in conjunction with radiographic measurements, may provide a more robust and improved patient-specific sensitivity for postoperative assessments. CoE balance may represent a new measure of added value for surgical intervention of ADS.
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Affiliation(s)
- Ram Haddas
- Texas Back Institute, 6020 West Parker Road, Plano, TX, 75093, USA.
| | - Stanley Kisinde
- Texas Back Institute, 6020 West Parker Road, Plano, TX, 75093, USA
| | - Damon Mar
- Texas Back Institute, 6020 West Parker Road, Plano, TX, 75093, USA
| | - Isador Lieberman
- Texas Back Institute, 6020 West Parker Road, Plano, TX, 75093, USA
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Cheng I, Stienen MN, Medress ZA, Varshneya K, Ho AL, Ratliff JK, Veeravagu A. Single- versus dual-attending strategy for spinal deformity surgery: 2-year experience and systematic review of the literature. J Neurosurg Spine 2020; 33:560-571. [PMID: 32650315 DOI: 10.3171/2020.3.spine2016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 03/31/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Adult spinal deformity (ASD) surgery is complex and associated with high morbidity and complication rates. There is growing evidence in the literature for the beneficial effects of an approach to surgery in which two attending physicians rather than a single attending physician perform surgery for and oversee the surgical care of a single patient in a dual-attending care model. The authors developed a dual-attending care collaboration in August 2017 in which a neurosurgeon and an orthopedic surgeon mutually operated on patients with ASD. METHODS The authors recorded data for 2 years of experience with ASD patients operated on by dual attending surgeons. Analyses included estimated blood loss (EBL), transfusions, length of stay (LOS), discharge disposition, complication rates, emergency room visits and readmissions, subjective health status improvement, and disability (Oswestry Disability Index [ODI] score) and pain (visual analog scale [VAS] score) at last follow-up. In addition, the pertinent literature for dual-attending spinal deformity correction was systematically reviewed. RESULTS The study group comprised 19 of 254 (7.5%) consecutively operated patients who underwent thoracolumbar fusion during the period from January 2017 to June 2019 (68.4% female; mean patient age 65.1 years, ODI score 44.5, VAS pain score 6.8). The study patients were matched by age, sex, anesthesia risk, BMI, smoking status, ODI score, VAS pain score, prior spine surgeries, and basic operative characteristics (type of interbody implants, instrumented segments, pelvic fixation) to 19 control patients (all p > 0.05). There was a trend toward less EBL (mean 763 vs 1524 ml, p = 0.059), fewer intraoperative red blood cell transfusions (mean 0.5 vs 2.3, p = 0.079), and fewer 90-day readmissions (0% vs 15.8%, p = 0.071) in the dual-attending group. LOS and discharge disposition were similar, as were the rates of any < 30-day postsurgery complications, < 90-day postsurgery emergency room visits, and reoperations, and ODI and VAS pain scores at last follow-up (all p > 0.05). At last follow-up, 94.7% vs 68.4% of patients in the dual- versus single-attending group stated their health status had improved (p = 0.036). In the authors' literature search of prior articles on spinal deformity correction, 5 of 8 (62.5%) articles reported lower EBL and 6 of 8 (75%) articles reported significantly lower operation duration in dual-attending cases. The literature contained differing results with regard to complication- or reoperation-sparing effects associated with dual-attending cases. Similar clinical outcomes of dual- versus single-attending cases were reported. CONCLUSIONS Establishing a dual-attending care management platform for ASD correction was feasible at the authors' institution. Results of the use of a dual-attending strategy at the authors' institution were favorable. Positive safety and outcome profiles were found in articles on this topic identified by a systematic literature review.
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Affiliation(s)
| | - Martin N Stienen
- 2Neurosurgery, Stanford University Hospitals and Clinics, Stanford, California
- 3Department of Neurosurgery, University Hospital Zurich; and
- 4Clinical Neuroscience Center, University of Zurich, Switzerland
| | - Zachary A Medress
- 2Neurosurgery, Stanford University Hospitals and Clinics, Stanford, California
| | - Kunal Varshneya
- 2Neurosurgery, Stanford University Hospitals and Clinics, Stanford, California
| | - Allen L Ho
- 2Neurosurgery, Stanford University Hospitals and Clinics, Stanford, California
| | - John K Ratliff
- 2Neurosurgery, Stanford University Hospitals and Clinics, Stanford, California
| | - Anand Veeravagu
- 2Neurosurgery, Stanford University Hospitals and Clinics, Stanford, California
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Lonser RR, Zipfel GJ, Chiocca EA. National Institute of Neurological Disorders and Stroke: current funding status, opportunities, challenges, emerging scientific advances, and recommendations for neurosurgery. J Neurosurg 2020; 133:1264-1269. [PMID: 32619985 DOI: 10.3171/2020.4.jns201202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Russell R Lonser
- 1Department of Neurological Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Gregory J Zipfel
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri; and
| | - E Antonio Chiocca
- 3Department of Neurological Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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Smith JS, Buell TJ, Shaffrey CI, Kim HJ, Klineberg E, Protopsaltis T, Passias P, Mundis GM, Eastlack R, Deviren V, Kelly MP, Daniels AH, Gum JL, Soroceanu A, Gupta M, Burton D, Hostin R, Hart R, Lafage V, Lafage R, Schwab FJ, Bess S, Ames CP. Prospective multicenter assessment of complication rates associated with adult cervical deformity surgery in 133 patients with minimum 1-year follow-up. J Neurosurg Spine 2020; 33:588-600. [PMID: 32559746 DOI: 10.3171/2020.4.spine20213] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 04/13/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Although surgical treatment can provide significant improvement of symptomatic adult cervical spine deformity (ACSD), few reports have focused on the associated complications. The objective of this study was to assess complication rates at a minimum 1-year follow-up based on a prospective multicenter series of ACSD patients treated surgically. METHODS A prospective multicenter database of consecutive operative ACSD patients was reviewed for perioperative (< 30 days), early (30-90 days), and delayed (> 90 days) complications with a minimum 1-year follow-up. Enrollment required at least 1 of the following: cervical kyphosis > 10°, cervical scoliosis > 10°, C2-7 sagittal vertical axis > 4 cm, or chin-brow vertical angle > 25°. RESULTS Of 167 patients, 133 (80%, mean age 62 years, 62% women) had a minimum 1-year follow-up (mean 1.8 years). The most common diagnoses were degenerative (45%) and iatrogenic (17%) kyphosis. Almost 40% of patients were active or past smokers, 17% had osteoporosis, and 84% had at least 1 comorbidity. The mean baseline Neck Disability Index and modified Japanese Orthopaedic Association scores were 47 and 13.6, respectively. Surgical approaches were anterior-only (18%), posterior-only (47%), and combined (35%). A total of 132 complications were reported (54 minor and 78 major), and 74 (56%) patients had at least 1 complication. The most common complications included dysphagia (11%), distal junctional kyphosis (9%), respiratory failure (6%), deep wound infection (6%), new nerve root motor deficit (5%), and new sensory deficit (5%). A total of 4 deaths occurred that were potentially related to surgery, 2 prior to 1-year follow-up (1 cardiopulmonary and 1 due to obstructive sleep apnea and narcotic use) and 2 beyond 1-year follow-up (both cardiopulmonary and associated with revision procedures). Twenty-six reoperations were performed in 23 (17%) patients, with the most common indications of deep wound infection (n = 8), DJK (n = 7), and neurological deficit (n = 6). Although anterior-only procedures had a trend toward lower overall (42%) and major (21%) complications, rates were not significantly different from posterior-only (57% and 33%, respectively) or combined (61% and 37%, respectively) approaches (p = 0.29 and p = 0.38, respectively). CONCLUSIONS This report provides benchmark rates for ACSD surgery complications at a minimum 1-year (mean 1.8 years) follow-up. The marked health and functional impact of ACSD, the frail population it affects, and the high rates of surgical complications necessitate a careful risk-benefit assessment when contemplating surgery. Collectively, these findings provide benchmarks for complication rates and may prove useful for patient counseling and efforts to improve the safety of care.
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Affiliation(s)
- Justin S Smith
- 1Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Thomas J Buell
- 1Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - Christopher I Shaffrey
- Departments of2Neurosurgery and
- 3Orthopedic Surgery, Duke University, Durham, North Carolina
| | - Han Jo Kim
- 4Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Eric Klineberg
- 5Department of Orthopaedic Surgery, University of California Davis, Sacramento, California
| | | | - Peter Passias
- 6Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases, New York, New York
| | | | | | - Vedat Deviren
- 8Department of Orthopedic Surgery, University of California, San Francisco, California
| | - Michael P Kelly
- 9Department of Orthopedic Surgery, Washington University in St. Louis, Missouri
| | - Alan H Daniels
- 10Department of Orthopedic Surgery, Brown University, Providence, Rhode Island
| | - Jeffrey L Gum
- 11Department of Orthopedic Surgery, Leatherman Spine Center, Louisville, Kentucky
| | - Alex Soroceanu
- 12Department of Orthopedic Surgery, University of Calgary, Alberta, Canada
| | - Munish Gupta
- 9Department of Orthopedic Surgery, Washington University in St. Louis, Missouri
| | - Doug Burton
- 13Department of Orthopaedic Surgery, University of Kansas Medical Center, Kansas City, Kansas
| | - Richard Hostin
- 14Department of Orthopaedic Surgery, Baylor Scoliosis Center, Plano, Texas
| | - Robert Hart
- 15Department of Orthopaedic Surgery, Swedish Medical Center, Seattle, Washington
| | - Virginie Lafage
- 4Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Renaud Lafage
- 4Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Frank J Schwab
- 4Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Shay Bess
- 16Presbyterian St. Luke's Medical Center, Denver, Colorado; and
| | - Christopher P Ames
- 17Department of Neurological Surgery, University of California, San Francisco, California
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Adult spine deformity surgery-what do we miss? Acta Neurochir (Wien) 2020; 162:1389-1391. [PMID: 32300987 DOI: 10.1007/s00701-020-04321-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 10/24/2022]
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Floyd E, Cohn P, Ferguson J, Kalantar SB. A review of preoperative planning technologies for spinal deformity correction. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.semss.2020.100787] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Safaee MM, Ames CP, Smith JS. Epidemiology and Socioeconomic Trends in Adult Spinal Deformity Care. Neurosurgery 2019; 87:25-32. [DOI: 10.1093/neuros/nyz454] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/18/2019] [Indexed: 12/21/2022] Open
Abstract
Abstract
Adult spinal deformity (ASD) has gained significant attention over the past decade with improvements in diagnostic tools, classification schemes, and surgical technique. The demographics of the aging population in the United States are undergoing a fundamental shift as medical care advances and life expectancy increases. The “baby boomers” represent the fastest growing demographic in the United States and by 2050, the number of individuals 65 yr and older is projected to reach 89 million, more than double its current size. Based on current prevalence estimates there are approximately 27.5 million elderly individuals with some form of spinal deformity, which will place a significant burden on our health care systems. Rates of surgery for ASD and case complexity are both increasing, with concomitant increase in the cost of deformity care. At the same time, patients are more medically complex with increasing number of comorbidities that result in increased surgical risk and complication profiles. This review aims to highlight recent trends in the epidemiology and socioeconomic patterns in surgery for ASD.
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Affiliation(s)
- Michael M Safaee
- Department of Neurological Surgery, University of California, San Francisco, California
| | - Christopher P Ames
- Department of Neurological Surgery, University of California, San Francisco, California
| | - Justin S Smith
- Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia
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