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Han RK, Chae JK, Garton ALA, Cruz A, Navarro-Ramirez R, Hussain I, Härtl R, Greenfield JP. Intraoperative occipital to C2 angle and external acoustic meatus-to-axis angular measurements for optimizing alignment during posterior fossa decompression and occipitocervical fusion for complex Chiari malformation. JOURNAL OF CRANIOVERTEBRAL JUNCTION AND SPINE 2023; 14:365-372. [PMID: 38268687 PMCID: PMC10805164 DOI: 10.4103/jcvjs.jcvjs_59_23] [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: 05/31/2023] [Accepted: 08/21/2023] [Indexed: 01/26/2024] Open
Abstract
Background Excess flexion or extension during occipitocervical fusion (OCF) can lead to postoperative complications, such as dysphagia, respiratory problems, line of sight issues, and neck pain, but posterior fossa decompression (PFD) and OCF require different positions that require intraoperative manipulation. Objective The objective of this study was to describe quantitative fluoroscopic morphometrics in Chiari malformation (CM) patients with symptoms of craniocervical instability (CCI) and demonstrate the intraoperative application of these measurements to achieve neutral craniocervical alignment while leveraging a single axis of motion with the Mayfield head clamp locking mechanism. Methods A retrospective cohort study of patients with CM 1 and 1.5 and features of CCI who underwent PFD and OCF at a single-center institution from March 2015 to October 2020 was performed. Patient demographics, preoperative presentation, radiographic morphometrics, operative details, complications, and clinical outcomes were analyzed. Results A total of 39 patients met the inclusion criteria, of which 37 patients (94.9%) did not require additional revision surgery after PFD and OCF. In this nonrevision cohort, preoperative to postoperative occipital to C2 angle (O-C2a) (13.5° ± 10.4° vs. 17.5° ± 10.1°, P = 0.047) and narrowest oropharyngeal airway space (nPAS) (10.9 ± 3.4 mm vs. 13.1 ± 4.8 mm, P = 0.007) increased significantly. These measurements were decreased in the two patients who required revision surgery due to postoperative dysphagia (mean difference - 16.6°° in O C2a and 12.8°° in occipital and external acoustic meatus to axis angle). Based on these results, these fluoroscopic morphometrics are intraoperatively assessed, utilizing a locking Mayfield head clamp repositioning maneuver to optimize craniocervical alignment prior to rod placement from the occipital plate to cervical screws. Conclusion Establishing a preoperative baseline of reliable fluoroscopic morphometrics can guide surgeons intraoperatively in appropriate patient realignment during combined PFD and OCF, and may prevent postoperative complications.
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Affiliation(s)
- Rachael K. Han
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
| | - John K. Chae
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
| | - Andrew L. A. Garton
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
| | - Amanda Cruz
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
| | - Rodrigo Navarro-Ramirez
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
- Department of Neurological Surgery, Weill Cornell Medicine, New York Presbyterian-Och Spine, New York, NY, USA
| | - Ibrahim Hussain
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
- Department of Neurological Surgery, Weill Cornell Medicine, New York Presbyterian-Och Spine, New York, NY, USA
| | - Roger Härtl
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
- Department of Neurological Surgery, Weill Cornell Medicine, New York Presbyterian-Och Spine, New York, NY, USA
| | - Jeffrey P. Greenfield
- Department of Neurological Surgery, Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY, USA
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Crawford AM, Striano BM, Lightsey HM, Gong J, Simpson AK, Schoenfeld AJ. Intraoperative CT for Lumbar Fusion Is Not Associated with Improved Short- or Long-Term Complication Profiles. Spine J 2023; 23:791-798. [PMID: 36870450 DOI: 10.1016/j.spinee.2023.02.016] [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] [Received: 12/12/2022] [Revised: 02/01/2023] [Accepted: 02/13/2023] [Indexed: 03/06/2023]
Abstract
BACKGROUND CONTEXT The use of intraoperative CT has continued to grow in recent years, as various techniques leverage the promise of improved instrumentation accuracy and the hope for decreased complications. Nonetheless, the literature regarding the short- and long-term complications associated with such techniques remains scant and/or confounded by indication and selection bias. PURPOSE To use causal inference techniques to determine whether intraoperative CT use is associated with an improved complication profile as compared to conventional radiography for single-level lumbar fusions, an increasingly commonplace application for this technology. STUDY DESIGN/SETTING Inverse probability weighted retrospective cohort study carried out within a large integrated healthcare network PATIENT SAMPLE: Adult patients who underwent surgical treatment of spondylolisthesis via lumbar fusion from January 2016 through December 2021 OUTCOME MEASURES: Our primary outcome was the incidence rate of revision surgery. Our secondary outcome was the incidence of composite 90-day complications (deep and superficial surgical site infection, venous thromboembolic events, and unplanned readmissions). METHODS Demographics, intraoperative information, and postoperative complications were abstracted from electronic health records. A propensity score was developed utilizing a parsimonious model to account for covariate interaction with our primary predictor, intraoperative imaging technique. This propensity score was utilized in the creation of inverse probability weights to adjust for indication and selection bias. The rate of revisions within 3 years as well as the rate of revisions at any time-point were compared between cohorts using Cox regression analysis. The incidence of composite 90-day complications were compared using negative binomial regression. RESULTS Our patient population consisted of 583 patients, with 132 who underwent intraoperative CT and 451 who underwent conventional radiographic techniques. There were no significant differences between cohorts following inverse probability weighting. No significant differences were detected in 3-year revision rates (HR 0.74 [95% CI 0.29, 1.92]; p=0.5), overall revision rates (HR 0.54 [95% CI 0.20, 1.46]; p=0.2), or 90-day complications (RC -0.24 [95% CI -1.35, 0.87]; p=0.7). CONCLUSIONS Intraoperative CT use was not associated with an improved complication profile in either the short- or long-term for patients undergoing single-level instrumented fusion. This observed clinical equipoise should be weighed against resource and radiation-related costs when considering intraoperative CT for low complexity fusions.
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Affiliation(s)
- Alexander M Crawford
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 75 Francis St, Boston, MA, 02115, USA
| | - Brendan M Striano
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 75 Francis St, Boston, MA, 02115, USA
| | - Harry M Lightsey
- Harvard Combined Orthopaedic Residency Program, Harvard Medical School, 75 Francis St, Boston, MA, 02115, USA
| | - Jonathan Gong
- Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Andrew K Simpson
- Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Andrew J Schoenfeld
- Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA.
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Soliman MAR, Aguirre AO, Khan S, Kuo CC, Ruggiero N, Mariotti BL, Fritz AG, Sharma S, Nezha A, Levy BR, Khan A, Salem AA, Jowdy PK, Zeeshan Q, Ghannam MM, Starling RV, Rho K, Pollina J, Mullin JP. Complications associated with subaxial placement of pedicle screws versus lateral mass screws in the cervical spine (C2-T1): systematic review and meta-analysis comprising 4,165 patients and 16,669 screws. Neurosurg Rev 2023; 46:61. [PMID: 36849823 DOI: 10.1007/s10143-023-01968-8] [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: 01/11/2023] [Revised: 02/09/2023] [Accepted: 02/19/2023] [Indexed: 03/01/2023]
Abstract
Lateral mass screw (LMS) and cervical pedicle screw (CPS) fixation are among the most popular techniques for posterior fusion of the cervical spine. Early research prioritized the LMS approach as the trajectory resulted in fewer neurovascular complications; however, with the incorporation of navigation assistance, the CPS approach should be re-evaluated. Our objective was to report the findings of a meta-analysis focused on comparing the LMS and CPS techniques in terms of rate of various complications with inclusion of all levels from C2 to T1. We conducted a systematic review of PubMed and EMBASE databases with final inclusion criteria focused on identifying studies that reported outcomes and complications for either the CPS or LMS technique. These studies were then pooled, and statistical analyses were performed from the cumulative data. A total of 60 studies comprising 4165 participants and 16,669 screws placed within the C2-T1 levels were identified. Within these studies, the LMS group had a significantly increased odds for lateral mass fractures (odds ratio [OR] = 43.2, 95% confidence interval [CI] = 2.62-711.42), additional cervical surgeries (OR = 5.56, 95%CI = 2.95-10.48), and surgical site infections (SSI) (OR = 5.47, 95%CI = 1.65-18.16). No other significant differences between groups in terms of complications were identified. Within the subgroup analysis of navigation versus non-navigation-guided CPS placement, no significant differences were identified for individual complications, although collectively significantly fewer complications occurred with navigation (OR = 5.29, 95%CI = 2.03-13.78). The CPS group had significantly fewer lateral mass fractures, cervical revision surgeries, and SSIs. Furthermore, navigation-assisted CPS placement was associated with a significant reduction in complications overall.
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Affiliation(s)
- Mohamed A R Soliman
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
- Department of Neurosurgery, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Alexander O Aguirre
- Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
| | - Slah Khan
- Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
| | - Cathleen C Kuo
- Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
| | - Nicco Ruggiero
- Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
| | - Brandon L Mariotti
- Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
| | - Alexander G Fritz
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - Siddharth Sharma
- Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
| | - Anxhela Nezha
- Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
| | - Bennett R Levy
- School of Medicine and Health Sciences, George Washington University, Washington, DC, USA
| | - Asham Khan
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - Amany A Salem
- Department of Public Health and Community Medicine, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Patrick K Jowdy
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - Qazi Zeeshan
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - Moleca M Ghannam
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - Robert V Starling
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - Kyungduk Rho
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - John Pollina
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA
| | - Jeffrey P Mullin
- Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences at University at Buffalo, Buffalo, NY, USA.
- Department of Neurosurgery, Buffalo General Medical Center, Kaleida Health, Buffalo, NY, USA.
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González-Vargas PM, Calero Félix L, Martín-Gallego Á, Thenier-Villa JL, de la Lama Zaragoza AR, Conde Alonso C. Evaluation of the implantation of transpedicular screws in spinal instrumentation with free-hand technique and navigation-assisted with intraoperative computed tomography: An analytical-positional study. NEUROCIRUGIA (ENGLISH EDITION) 2022; 33:71-81. [PMID: 35248301 DOI: 10.1016/j.neucie.2021.01.002] [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: 08/17/2020] [Accepted: 01/10/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND Spinal instrumentation using transpedicular screws has been used for decades to stabilize the spine. In October 2018, an intraoperative CT system was acquired in the Neurosurgery service of the University Hospital Complex of Vigo, this being the first model of these characteristics in the Spanish Public Health System, so we began a study from January 2015 to December 2019 to assess the precision of the transpedicular screws implanted with this system compared with a control group performed with the classical technique and final fluoroscopic control. METHODS The study was carried out in patients who required transpedicular instrumentation surgery, in total 655 screws were placed, 339 using the free-hand technique (Group A) and 316 assisted with intraoperative CT navigation (Group B) (p>0.05). Demographic characteristics, related to surgery and the screw implantation grades were assessed using the Gertzbein-Robbins classification. RESULTS 92 patients were evaluated, between 12 and 86 years (average: 57.1 years). 161 thoracic screws (24.6%) and 494 lumbo-sacral screws (75.4%) were implanted. Of the thoracic screws, 33 produced a pedicle rupture. For the lumbo-sacral screws, 71 have had pedicle violation. The overall correct positioning rate for the free-hand group was 72.6% and for the CT group it was 96.5% (p<0.05). CONCLUSION The accuracy rate is higher in thoracic-lumbar instrumentation in the navigation group versus free-hand group with fluoroscopic control.
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Affiliation(s)
- Pedro Miguel González-Vargas
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain.
| | - Lourdes Calero Félix
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
| | - Álvaro Martín-Gallego
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
| | - José Luis Thenier-Villa
- Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain; Department of Neurosurgery, Hospital Universitari Arnau de Vilanova, Lleida, Spain
| | - Adolfo Ramón de la Lama Zaragoza
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
| | - Cesáreo Conde Alonso
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
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Chae JK, Marianayagam NJ, Hussain I, Cruz A, Baaj AA, Härtl R, Greenfield JP. Predicting clinical outcomes using morphometric changes in adults with complex Chiari malformation undergoing occipitocervical fusion with or without ventral decompression: patient series. JOURNAL OF NEUROSURGERY: CASE LESSONS 2021; 2:CASE21364. [PMID: 36059719 PMCID: PMC9435543 DOI: 10.3171/case21364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 07/06/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND The authors assessed the connection between clinical outcomes and morphometrics in patients with complex Chiari malformation (CM) who have undergone posterior fossa decompression (PFD) and subsequent occipitocervical fusion (OCF) with or without ventral decompression (VD). OBSERVATIONS The authors retrospectively reviewed 33 patients with CM aged over 21 years who underwent PFD and OCF with or without endoscopic endonasal odontoidectomy at the authors’ institution (21 OCF only and 12 OCF + VD). Clivoaxial angle (CXA), pB-C2 (perpendicular line to the line between the basion and C2), atlantodental interval (ADI), basion-dens interval (BDI), basion-axial interval (BAI), and C1 canal diameter were measured on preoperative and approximately 3-month postoperative computed tomography or magnetic resonance imaging scans. Common symptoms included headache, paresthesia, and bulbar symptoms. Clinical improvement after surgery was observed in 78.8% of patients. CXA, ADI, and BDI all significantly increased after surgery, whereas pB-C2 and BAI significantly decreased. OCF + VD had a significantly more acute CXA and longer pB-C2 preoperatively than OCF only. Patients who clinically improved postoperatively showed the same significant morphometric changes, but those who did not improve showed no significant morphometric changes. LESSONS Patients showing improvement had greater corrections in skull base morphometrics than those who did not. Although there are various mutually nonexclusive reasons why certain patients do not improve after surgery, smaller degrees of morphometric correction could play a role.
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Affiliation(s)
- John K. Chae
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Neelan J. Marianayagam
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Ibrahim Hussain
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Amanda Cruz
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Ali A. Baaj
- Department of Neurosurgery, University of Arizona College of Medicine, Phoenix, Arizona
| | - Roger Härtl
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Jeffrey P. Greenfield
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
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Kumar V, Baburaj V, Patel S, Sharma S, Vaishya R. Does the use of intraoperative CT scan improve outcomes in Orthopaedic surgery? A systematic review and meta-analysis of 871 cases. J Clin Orthop Trauma 2021; 18:216-223. [PMID: 34040978 PMCID: PMC8138210 DOI: 10.1016/j.jcot.2021.04.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Intraoperative imaging is frequently made use of in Orthopaedic surgery. Historically, conventional 2-dimensional fluoroscopy has been extensively used for this purpose. However, 2D imaging falls short when it is required to visualise complex anatomical regions such as pelvis, spine, foot and ankle etc. Intraoperative 3D imaging was introduced to counter these limitations, and is increasingly being employed in various sub-specialities of Orthopaedic Surgery. OBJECTIVES This review aims to outline the clinical and radiological outcomes of surgeries done under the guidance of intraoperative 3D imaging and compare them to those done under conventional 2D fluoroscopy. METHODS Three electronic databases (PubMed, Embase and Scopus) were searched for relevant studies that directly compared intraoperative 3D imaging with conventional fluoroscopy. Case series on intraoperative 3D imaging were also included for qualitative synthesis. The outcomes evaluated included accuracy of implant placement, mean surgical duration and rate of revision surgery due to faulty implants. RESULTS A total of 31 studies from sub-specialities of spine surgery, pelvi-acetabular surgery, foot and ankle surgery and trauma surgery, having data on a total of 658 patients were analysed. The study groups which had access to intraoperative 3D imaging was found to have significantly increased accuracy of implant positioning (Odds Ratio 0.35 [0.20, 0.62], p = 0.0002) without statistically significant difference in mean surgical time (p = 0.57). Analysis of the studies that included clinical follow up showed that the use of intraoperative 3D imaging led to a significant decrease in the need for revision surgeries due to faulty implant placement. CONCLUSION There is sufficient evidence that the application of intraoperative 3D imaging leads to precise implant positioning and improves the radiological outcome. Further research in the form of prospective studies with long term follow up is required to determine whether this superior radiological outcome translates to better clinical results in the long run.
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Affiliation(s)
- Vishal Kumar
- Department of Orthopaedics, Postgraduate Institute of Medial Education and Research, Chandigarh, India
| | - Vishnu Baburaj
- Department of Orthopaedics, Postgraduate Institute of Medial Education and Research, Chandigarh, India
| | - Sandeep Patel
- Department of Orthopaedics, Postgraduate Institute of Medial Education and Research, Chandigarh, India
| | - Siddhartha Sharma
- Department of Orthopaedics, Postgraduate Institute of Medial Education and Research, Chandigarh, India
| | - Raju Vaishya
- Department of Orthopaedics, Indraprastha Apollo Hospitals, New Delhi, India
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González-Vargas PM, Calero Félix L, Martín-Gallego Á, Thenier-Villa JL, de la Lama Zaragoza AR, Conde Alonso C. Evaluation of the implantation of transpedicular screws in spinal instrumentation with free-hand technique and navigation-assisted with intraoperative computed tomography: An analytical-positional study. Neurocirugia (Astur) 2021; 33:S1130-1473(21)00010-5. [PMID: 33663907 DOI: 10.1016/j.neucir.2021.01.001] [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: 08/17/2020] [Revised: 01/10/2021] [Accepted: 01/10/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND Spinal instrumentation using transpedicular screws has been used for decades to stabilize the spine. In October 2018, an intraoperative CT system was acquired in the Neurosurgery service of the University Hospital Complex of Vigo, this being the first model of these characteristics in the Spanish Public Health System, so we began a study from January 2015 to December 2019 to assess the precision of the transpedicular screws implanted with this system compared with a control group performed with the classical technique and final fluoroscopic control. METHODS The study was carried out in patients who required transpedicular instrumentation surgery, in total 655 screws were placed, 339 using the free-hand technique (Group A) and 316 assisted with intraoperative CT navigation (Group B) (p>0.05). Demographic characteristics, related to surgery and the screw implantation grades were assessed using the Gertzbein-Robbins classification. RESULTS 92 patients were evaluated, between 12 and 86 years (average: 57.1 years). 161 thoracic screws (24.6%) and 494 lumbo-sacral screws (75.4%) were implanted. Of the thoracic screws, 33 produced a pedicle rupture. For the lumbo-sacral screws, 71 have had pedicle violation. The overall correct positioning rate for the free-hand group was 72.6% and for the CT group it was 96.5% (p<0.05). CONCLUSION The accuracy rate is higher in thoracic-lumbar instrumentation in the navigation group versus free-hand group with fluoroscopic control.
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Affiliation(s)
- Pedro Miguel González-Vargas
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain.
| | - Lourdes Calero Félix
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
| | - Álvaro Martín-Gallego
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
| | - José Luis Thenier-Villa
- Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain; Department of Neurosurgery, Hospital Universitari Arnau de Vilanova, Lleida, Spain
| | - Adolfo Ramón de la Lama Zaragoza
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
| | - Cesáreo Conde Alonso
- Department of Neurosurgery, University Hospital Complex of Vigo, Pontevedra, Spain; Neuroscience Research Group, Galicia Sur Health Research Institute, Vigo, Pontevedra, Spain
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Jenkins NW, Parrish JM, Sheha ED, Singh K. Intraoperative risks of radiation exposure for the surgeon and patient. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:84. [PMID: 33553377 PMCID: PMC7859810 DOI: 10.21037/atm-20-1052] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Intraoperative radiological imaging serves an essential role in many spine surgery procedures. It is critical that patients, staff and physicians have an adequate understanding of the risks and benefits associated with radiation exposure for all involved. In this review, we briefly introduce the current trends associated with intraoperative radiological imaging. With the increased utilization of minimally invasive spine surgery (MIS) techniques, the benefits of intraoperative imaging have become even more important. Less surgical exposure, however, often equates to an increased requirement for intraoperative imaging. Understanding the conventions for radiation measurement, radiological fundamental concepts, along with deterministic or stochastic effects gives a framework for conceptualizing how radiation exposure relates to the risk of various sequela. Additionally, we describe the various options surgeons have for intraoperative imaging modalities including those based on conventional fluoroscopy, computer tomography, and magnetic resonance imaging. We also describe different ways to prevent unnecessary radiation exposure including dose reduction, better education, and use of personal protective equipment (PPE). Finally, we conclude with a reflection on the progress that has been made to limit intraoperative radiation exposure and the promise of future technology and policy.
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Affiliation(s)
- Nathaniel W Jenkins
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
| | - James M Parrish
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Evan D Sheha
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Kern Singh
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
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Abstract
INTRODUCTION Traditionally, fluoroscopy and postoperative computed tomographic (CT) scans are used to evaluate screw position after pediatric cervical spine fusion. However, noncontained screws detected postoperatively can require revision surgery. Intraoperative O-arm is a 3-dimensional CT imaging technique, which allows intraoperative evaluation of screw position and potentially avoids reoperations because of implant malposition. This study's objective was to evaluate the use of intraoperative O-arm in determining the accuracy of cervical implants placed by a free-hand technique using anatomic landmarks or fluoroscopic guidance in pediatric cervical spine instrumentation. METHODS A single-center retrospective study of consecutive examinations of children treated with cervical spine instrumentation and intraoperative O-arm from 2014 to 2018 was performed. In total, 44 cases (41 children, 44% men) with a mean age of 11.9 years (range, 2.1 to 23.5 y) were identified. Instability (n=16, 36%) and deformity (n=10, 23%) were the most frequent indications. Primary outcomes were screw revision rate, neurovascular complications caused by noncontained screws, and radiation exposure. RESULTS A total of 272 screws were inserted (60 occipital and 212 cervical screws). All screws were evaluated on fluoroscopy as appropriately placed. Four screws (1.5%) in 4 cases (9%) were noncontained on O-arm imaging and required intraoperative revision. A mean of 7.7 levels (range, 5 to 13) were scanned. The mean CT dose index and dose-length product were 15.2±6.87 mGy and 212.3±120.48 mGy×cm. Mean effective dose was 1.57±0.818 mSv. There was no association between screw location and noncontainment (P=0.129). No vertebral artery injuries, dural injuries, or neurologic deficits were related to the 4 revised screws. CONCLUSIONS Intraoperative non-navigated O-arm is a safe and efficient method to evaluate screw position in pediatric patients undergoing cervical spine instrumentation. Noncontained screws were detected in 9% of cases (n=4). O-arm delivers low radiation doses, allows for intraoperative screw revision, and negates the need for postoperative CT scans after confirmation of optimal implant position. LEVEL OF EVIDENCE Level IV.
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Lee YC, Lee R. Image-guided pedicle screws using intraoperative cone-beam CT and navigation. A cost-effectiveness study. J Clin Neurosci 2020; 72:68-71. [PMID: 31964560 DOI: 10.1016/j.jocn.2020.01.025] [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: 10/07/2019] [Accepted: 01/06/2020] [Indexed: 10/25/2022]
Abstract
Image-guided surgery using intraoperative cone-beam CT and navigation improves screw placement accuracy rates. However, this technology is associated with high acquisition costs. The aim of this study is to evaluate the costs of revision surgery from symptomatic pedicle screw malposition to justify whether the costs of acquiring intraoperative navigation justify the expected benefits. This is a retrospective cost-effectiveness analysis of consecutive patients who had pedicle screw instrumentation using intraoperative cone-beam CT and navigation compared with patients who underwent freehand pedicle screw instrumentation at our institution over 4 years. The costs associated with revision surgery for symptomatic pedicle screw malposition (excess length of stay, intensive care, theatre time, implants and additional outpatient appointments) were calculated. A total of 19 patients had symptomatic screw malpositioning requiring revision surgery. None of these patients had screws inserted under navigation. Revision surgery accounted for an extra 304 bed days and an additional 97 h theatre time. The total extra spent over 4 years was £464,038. When compared to the costs of revision surgery for screw malpositioning, it was cost neutral to acquire and maintain this technology. Intraoperative image-guided surgery reduces reoperation rates for symptomatic screw malposition and is cost-effective in high volume centers with improved patients outcomes. High acquisition and maintenance cost of such technologies is economically justifiable.
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Affiliation(s)
- Yu Chao Lee
- Spinal Surgery Unit, Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore HA7 4LP, United Kingdom
| | - Robert Lee
- Spinal Surgery Unit, Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore HA7 4LP, United Kingdom.
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Restelli U, Anania CD, Porazzi E, Banfi G, Croce D, Fornari M, Costa F. Economic study: an observational analysis of costs and effectiveness of an intraoperative compared with a preoperative image-guided system in spine surgery fixation: analysis of 10 years of experience. J Neurosurg Sci 2019; 66:350-355. [PMID: 30916525 DOI: 10.23736/s0390-5616.19.04638-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Image-guided navigation systems are well establish technologies; their use in clinical practice is growing. To date many publications have demonstrated their accuracy and safety. However, the acquisition and maintenance costs are high. In an era in which health expenditures are rising exponentially, analyses of the economic impact of new technologies are mandatory to assess their sustainability. METHODS A retrospective analysis to assess the overall costs of a series of patients admitted to our Neurosurgical Department for spinal instrumentation. We compared two different types of spinal navigation systems: based on preoperative CT scan (January 2003-April 2009) and on intraoperative CT-like scan (April 2009-March 2013). We used a micro-costing approach by a hospital perspective considering all the phases of the treatment process, from pre admission testing to discharge. RESULTS The study includes 875 patients. Baseline data, hospitalization and complications were similar for both. Mean cost was 7,305.9 € for intraoperative CT scan procedure and 7,666.2 € for preoperative image-guided system. The effectiveness, in terms of screw accuracy was similar. Higher costs were related to implanted materials, human resources, and disposable. CONCLUSIONS There was a statistically significant difference between the two groups in terms of costs. A break-even point for the acquisition of an intraoperative image system is calculated in almost 130 procedures. Moreover, nowadays this system is used for more than only screw insertion reducing the financial impact of this technology on a Hospital.
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Affiliation(s)
- Umberto Restelli
- Center for Health Economics, Social and Health Care Management, LIUC, Università Cattaneo, Castellanza, Varese, Italy.,School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Carla D Anania
- Neurosurgery Department, Humanitas Clinical and Research Center, Neuro Center, Rozzano, Milan, Italy
| | - Emanuele Porazzi
- Center for Health Economics, Social and Health Care Management, LIUC, Università Cattaneo, Castellanza, Varese, Italy
| | - Giuseppe Banfi
- Scientific Direction, Istituto Ortopedico Galeazzi, IRCCS, Milan, Italy.,Vita-Salute San Raffaele University, Milan, Italy
| | - Davide Croce
- Center for Health Economics, Social and Health Care Management, LIUC, Università Cattaneo, Castellanza, Varese, Italy.,School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Maurizio Fornari
- Neurosurgery Department, Humanitas Clinical and Research Center, Neuro Center, Rozzano, Milan, Italy
| | - Francesco Costa
- Neurosurgery Department, Humanitas Clinical and Research Center, Neuro Center, Rozzano, Milan, Italy -
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Takahata M, Yamada K, Akira I, Endo T, Sudo H, Yokoyama H, Iwasaki N. A novel technique of cervical pedicle screw placement with a pilot screw under the guidance of intraoperative 3D imaging from C-arm cone-beam CT without navigation for safe and accurate insertion. 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 2018; 27:2754-2762. [DOI: 10.1007/s00586-018-5706-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 07/16/2018] [Indexed: 12/19/2022]
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Schröder ML, Staartjes VE. Revisions for screw malposition and clinical outcomes after robot-guided lumbar fusion for spondylolisthesis. Neurosurg Focus 2017; 42:E12. [DOI: 10.3171/2017.3.focus16534] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVEThe accuracy of robot-guided pedicle screw placement has been proven to be high, but little is known about the impact of such guidance on clinical outcomes such as the rate of revision surgeries for screw malposition. In addition, there are very few data about the impact of robot-guided fusion on patient-reported outcomes (PROs). Thus, the clinical benefit for the patient is unclear. In this study, the authors analyzed revision rates for screw malposition and changes in PROs following minimally invasive robot-guided pedicle screw fixation.METHODSA retrospective cohort study of patients who had undergone minimally invasive posterior lumbar interbody fusion (MI-PLIF) or minimally invasive transforaminal lumbar interbody fusion was performed. Patients were followed up clinically at 6 weeks, 12 months, and 24 months after treatment and by mailed questionnaire in March 2016 as a final follow-up. Visual analog scale (VAS) scores for back and leg pain severity, Oswestry Disability Index (ODI), screw revisions, and socio-demographic factors were analyzed. A literature review was performed, comparing the incidence of intraoperative screw revisions and revision surgery for screw malposition in robot-guided, navigated, and freehand fusion procedures.RESULTSSeventy-two patients fit the study inclusion criteria and had a mean follow up of 32 ± 17 months. No screws had to be revised intraoperatively, and no revision surgery for screw malposition was needed. In the literature review, the authors found a higher rate of intraoperative screw revisions in the navigated pool than in the robot-guided pool (p < 0.001, OR 9.7). Additionally, a higher incidence of revision surgery for screw malposition was observed for freehand procedures than for the robot-guided procedures (p < 0.001, OR 8.1). The VAS score for back pain improved significantly from 66.9 ± 25.0 preoperatively to 30.1 ± 26.8 at the final follow-up, as did the VAS score for leg pain (from 70.6 ± 22.8 to 24.3 ± 28.3) and ODI (from 43.4 ± 18.3 to 16.2 ± 16.7; all p < 0.001). Undergoing PLIF, a high body mass index, smoking status, and a preoperative ability to work were identified as predictors of a reduction in back pain. Length of hospital stay was 2.4 ± 1.1 days and operating time was 161 ± 50 minutes. Ability to work increased from 38.9% to 78.2% of patients (p < 0.001) at the final follow-up, and 89.1% of patients indicated they would choose to undergo the same treatment again.CONCLUSIONSIn adults with low-grade spondylolisthesis, the data demonstrated a benefit in using robotic guidance to reduce the rate of revision surgery for screw malposition as compared with other techniques of pedicle screw insertion described in peer-reviewed publications. Larger comparative studies are required to assess differences in PROs following a minimally invasive approach in spinal fusion surgeries compared with other techniques.
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Affiliation(s)
- Marc L. Schröder
- 1Department of Neurosurgery, Bergman Clinics, Naarden, The Netherlands; and
| | - Victor E. Staartjes
- 1Department of Neurosurgery, Bergman Clinics, Naarden, The Netherlands; and
- 2Faculty of Medicine, University of Zurich, Switzerland
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Reliability and Usefulness of Intraoperative 3-Dimensional Imaging by Mobile C-Arm With Flat-Panel Detector. Clin Spine Surg 2017; 30:E64-E75. [PMID: 28107246 DOI: 10.1097/bsd.0b013e3182a357ad] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
STUDY DESIGN Reliability and agreement study. OBJECTIVE To assess the reliability of intraoperative 3-dimensional imaging with a mobile C-arm (3D C-arm) equipped with a flat-panel detector. SUMMARY OF BACKGROUND DATA Pedicle screws are widely used in spinal surgery. Postoperative computed tomography (CT) is the most reliable method to detect screw misplacement. Recent advances in imaging devices have enabled surgeons to acquire 3D images of the spine during surgery. However, the reliability of these imaging devices is not known. METHODS A total of 203 screws were used in 22 consecutive patients who underwent surgery for scoliosis. Screw position was read twice with a 3D C-arm and twice with CT in a blinded manner by 2 independent observers. Screw positions were classified into 4 categories at every 2 mm and then into 2 simpler categories of acceptable or unacceptable. The degree of agreement with respect to screw positions between the double readings was evaluated by κ value. With unanimous agreement between 2 observers regarding postoperative CT readings considered the gold standard, the sensitivity of the 3D C-arm for determining screw misplacement was calculated. RESULTS A total 804 readings were performed. For the 4-category classification, the mean κ value for the 2 interobserver readings was 0.52 for the 3D C-arm and 0.46 for CT. For the 2-category classification, the mean κ value for the 2 interobserver readings was 0.80 for the 3D C-arm and 0.66 for CT. The sensitivity, specificity, positive predictive value, and negative predictive value of intraoperative imaging with the 3D C-arm were 70%, 95%, 44%, and 98%, respectively. With respect to screws with perforation ≥4 mm, the sensitivity was 83%. No revision surgery was performed. CONCLUSIONS Intraoperative imaging with a 3D C-arm was reliable for detecting screw misplacement and helpful in decreasing the rate of revision surgery for screw misplacement.
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Abstract
STUDY DESIGN A technical report. OBJECTIVE The aim of the present study was to present an improvement on localization techniques employed for use in the thoracic spine using sterile spinal needles docked on the transverse process of each vertebra, which can be performed in both percutaneous and open spinal procedures. SUMMARY OF BACKGROUND DATA Wrong-level surgery may have momentous clinical and emotional implications for a patient and surgeon. It is reported that one in every 2 spine surgeons will operate on the wrong level during his or her career. Correctly localizing the specific thoracic level remains a significant challenge during spine surgery. METHODS Fluoroscopic anteroposterior and lateral views were obtained starting in the lower lumbar spine, and an 18-G spinal needle was placed in the transverse process of L3 counting up from the sacrum and also at T12. The fluoroscopy was then moved cephalad and counting from the spinal needle at T12, the other spinal needles were placed at the targeted operating thoracic vertebrae. Once this was done, we were able to accurately determine the thoracic levels for surgical intervention. RESULTS Using this technique, the markers were kept in place even after the incisions were made. This prevented us from losing our location in the thoracic spine. Correctly placed instrumentation was made evident with postoperative imaging. CONCLUSIONS We have described the successful use of a new technique using spinal needles docked against transverse processes to correctly and reliably identify thoracic levels before instrumentation. The technique was reproducible in both open surgeries and for a percutaneous procedure. This technique maintains the correct spinal level during an open procedure. We posit that wrong-level thoracic spine surgery may be preventable.
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Dea N, Fisher CG, Batke J, Strelzow J, Mendelsohn D, Paquette SJ, Kwon BK, Boyd MD, Dvorak MFS, Street JT. Economic evaluation comparing intraoperative cone beam CT-based navigation and conventional fluoroscopy for the placement of spinal pedicle screws: a patient-level data cost-effectiveness analysis. Spine J 2016; 16:23-31. [PMID: 26456854 DOI: 10.1016/j.spinee.2015.09.062] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 08/28/2015] [Accepted: 09/29/2015] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Pedicle screws are routinely used in contemporary spinal surgery. Screw misplacement may be asymptomatic but is also correlated with potential adverse events. Computer-assisted surgery (CAS) has been associated with improved screw placement accuracy rates. However, this technology has substantial acquisition and maintenance costs. Despite its increasing usage, no rigorous full economic evaluation comparing this technology to current standard of care has been reported. PURPOSE Medical costs are exploding in an unsustainable way. Health economic theory requires that medical equipment costs be compared with expected benefits. To answer this question for computer-assisted spinal surgery, we present an economic evaluation looking specifically at symptomatic misplaced screws leading to reoperation secondary to neurologic deficits or biomechanical concerns. STUDY DESIGN/SETTING The study design was an observational case-control study from prospectively collected data of consecutive patients treated with the aid of CAS (treatment group) compared with a matched historical cohort of patients treated with conventional fluoroscopy (control group). PATIENT SAMPLE The patient sample consisted of consecutive patients treated surgically at a quaternary academic center. OUTCOME MEASURES The primary effectiveness measure studied was the number of reoperations for misplaced screws within 1 year of the index surgery. Secondary outcome measures included were total adverse event rate and postoperative computed tomography usage for pedicle screw examination. METHODS A patient-level data cost-effectiveness analysis from the hospital perspective was conducted to determine the value of a navigation system coupled with intraoperative 3-D imaging (O-arm Imaging and the StealthStation S7 Navigation Systems, Medtronic, Louisville, CO, USA) in adult spinal surgery. The capital costs for both alternatives were reported as equivalent annual costs based on the annuitization of capital expenditures method using a 3% discount rate and a 7-year amortization period. Annual maintenance costs were also added. Finally, reoperation costs using a micro-costing approach were calculated for both groups. An incremental cost-effectiveness ratio was calculated and reported as cost per reoperation avoided. Based on reoperation costs in Canada and in the United States, a minimal caseload was calculated for the more expensive alternative to be cost saving. Sensitivity analyses were also conducted. RESULTS A total of 5,132 pedicle screws were inserted in 502 patients during the study period: 2,682 screws in 253 patients in the treatment group and 2,450 screws in 249 patients in the control group. Overall accuracy rates were 95.2% for the treatment group and 86.9% for the control group. Within 1 year post treatment, two patients (0.8%) required a revision surgery in the treatment group compared with 15 patients (6%) in the control group. An incremental cost-effectiveness ratio of $15,961 per reoperation avoided was calculated for the CAS group. Based on a reoperation cost of $12,618, this new technology becomes cost saving for centers performing more than 254 instrumented spinal procedures per year. CONCLUSIONS Computer-assisted spinal surgery has the potential to reduce reoperation rates and thus to have serious cost-effectiveness and policy implications. High acquisition and maintenance costs of this technology can be offset by equally high reoperation costs. Our cost-effectiveness analysis showed that for high-volume centers with a similar case complexity to the studied population, this technology is economically justified.
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Affiliation(s)
- Nicolas Dea
- Department of Surgery, Division of Neurosurgery, Université de Sherbrooke, 3001, 12th Ave Nord, Sherbrooke, Quebec, Canada J1H 5N4.
| | - Charles G Fisher
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Juliet Batke
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Jason Strelzow
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Daniel Mendelsohn
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Scott J Paquette
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Brian K Kwon
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Michael D Boyd
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Marcel F S Dvorak
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - John T Street
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
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Roth CJ, Angevine PD, Aulino JM, Berger KL, Choudhri AF, Fries IB, Holly LT, Kendi ATK, Kessler MM, Kirsch CF, Luttrull MD, Mechtler LL, O'Toole JE, Sharma A, Shetty VS, West OC, Cornelius RS, Bykowski J. ACR Appropriateness Criteria Myelopathy. J Am Coll Radiol 2015; 13:38-44. [PMID: 26653797 DOI: 10.1016/j.jacr.2015.10.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 10/04/2015] [Indexed: 12/11/2022]
Abstract
Patients presenting with myelopathic symptoms may have a number of causative intradural and extradural etiologies, including disc degenerative diseases, spinal masses, infectious or inflammatory processes, vascular compromise, and vertebral fracture. Patients may present acutely or insidiously and may progress toward long-term paralysis if not treated promptly and effectively. Noncontrast CT is the most appropriate first examination in acute trauma cases to diagnose vertebral fracture as the cause of acute myelopathy. In most nontraumatic cases, MRI is the modality of choice to evaluate the location, severity, and causative etiology of spinal cord myelopathy, and predicts which patients may benefit from surgery. Myelopathy from spinal stenosis and spinal osteoarthritis is best confirmed without MRI intravenous contrast. Many other myelopathic conditions are more easily visualized after contrast administration. Imaging performed should be limited to the appropriate spinal levels, based on history, physical examination, and clinical judgment. The ACR Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed every three years by a multidisciplinary expert panel. The guideline development and review include an extensive analysis of current medical literature from peer-reviewed journals, and the application of a well-established consensus methodology (modified Delphi) to rate the appropriateness of imaging and treatment procedures by the panel. In those instances in which evidence is lacking or not definitive, expert opinion may be used to recommend imaging or treatment.
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Affiliation(s)
| | - Peter D Angevine
- Columbia University Medical Center, New York, New York, American Association of Neurological Surgeons/Congress of Neurological Surgeons
| | | | | | - Asim F Choudhri
- Le Bonheur Children's Hospital, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Ian Blair Fries
- Bone, Spine and Hand Surgery, Chartered, Brick, New Jersey, American Academy of Orthopaedic Surgeons
| | - Langston T Holly
- University of California Los Angeles, Los Angeles, California, American Association of Neurological Surgeons/Congress of Neurological Surgeons
| | | | - Marcus M Kessler
- University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | | | | | - Laszlo L Mechtler
- Dent Neurologic Institute, Amherst, New York, American Academy of Neurology
| | - John E O'Toole
- Rush University, Chicago, Illinois, American Association of Neurological Surgeons/Congress of Neurological Surgeons
| | - Aseem Sharma
- Mallinckrodt Institute of Radiology, Saint Louis, Missouri
| | | | | | | | - Julie Bykowski
- University of California San Diego Health Center, San Diego, California
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Al-Khouja L, Shweikeh F, Pashman R, Johnson JP, Kim TT, Drazin D. Economics of image guidance and navigation in spine surgery. Surg Neurol Int 2015; 6:S323-6. [PMID: 26167370 PMCID: PMC4496834 DOI: 10.4103/2152-7806.159381] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 03/06/2015] [Indexed: 12/31/2022] Open
Abstract
Background: Image-guidance and navigation in spinal surgery is becoming more widely utilized. Several studies have shown the use of this technology to increase accuracy of pedicle screw placement, decrease the rates of revision surgery, and minimize radiation exposure. In this paper, the authors analyze the economics of image-guided surgery (IGS) and navigation in spine surgery. Methods: A literature review was performed using PubMed, the CEA Registry, and the National Health Service Economic Evaluation Database. Each article was screened for inclusion and exclusion criteria, including costs, reoperation, readmission rates, operating room time, and length of stay. Results: Thirteen studies were included in the analysis. Six studies were identified to meet the inclusion criteria for reporting costs and seven met the criteria for analysis of efficacy. Average costs ranged from $17,650 to $39,643. Pedicle screw misplacement rates using IGS ranged from 1.20% to 15.07% while reoperation rates ranged from 0% to 7.42%. Conclusion: There is currently an insufficient amount of studies reporting on the economics of spinal navigation to accurately conclude on its cost-effectiveness in clinical practice. Although a few of these studies showed less costs associated with intraoperative imaging, none were able to establish a statistically significant difference. Preliminary findings drawn from this study indicate a possible cost-effectiveness advantage with IGS, but more comprehensive data on costs need to be reported in order to validate its utilization.
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Affiliation(s)
- Lutfi Al-Khouja
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Faris Shweikeh
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Robert Pashman
- Department of Orthopaedics, Cedars-Sinai Medical Center, Los Angeles, USA
| | - J Patrick Johnson
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, USA ; Department of Neurosurgery, University of California Davis Medical Center, Sacramento, California, USA
| | - Terrence T Kim
- Department of Orthopaedics, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Doniel Drazin
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, USA
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Santos ERG, Sembrano JN, Yson SC, Polly DW. Comparison of open and percutaneous lumbar pedicle screw revision rate using 3-D image guidance and intraoperative CT. Orthopedics 2015; 38:e129-34. [PMID: 25665118 DOI: 10.3928/01477447-20150204-61] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 04/28/2014] [Indexed: 02/03/2023]
Abstract
Complications arising from a malpositioned screw can be both devastating and costly. The incidence of neurologic injury secondary to a malpositioned screw is reported to be as high as 7% to 12%. The advancement of image-guided technology has allowed surgeons to place screws more accurately and confirm correct placement prior to leaving the operating room. Only a small number of studies have examined image-guided pedicle screw accuracy in terms of intraoperative revision and reoperation rates. The purpose of this study was to determine the intraoperative revision and return to surgery rates for navigated lumbar pedicle screws and to compare navigated open and percutaneous techniques. The authors reviewed 199 cases of 3-dimensional image-guided lumbar pedicle screw instrumentation from November 2006 to December 2011. Screw or K-wire removal, repositioning, or eventual abandonment of insertion were noted. Chi-square test was used to determine statistical significance in rates between the 2 groups (alpha=0.05). The authors also noted return to surgery secondary to complications from a malpositioned screw. The overall intraoperative revision rate of navigated lumbar pedicle screws was 4.6%. There were significantly more revisions in the percutaneously inserted screws (7.5%) than with the open technique (2.7%) (P=.0004). If K-wire revisions are excluded, there was no statistically significant difference in intraoperative revision rates between the percutaneous and open groups (2.1% vs 2.7%, respectively) (P=.0004). No patients underwent reoperation for a malpositioned screw. This technology has virtually eliminated the need for reoperation for screw malposition. It may suggest a more cost-effective way of preventing neurovascular injuries and revision surgeries.
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Radiograms Obtained during Anterior Cervical Decompression and Fusion Can Mislead Surgeons into Performing Surgery at the Wrong Level. Case Rep Orthop 2014; 2014:398457. [PMID: 25386376 PMCID: PMC4216671 DOI: 10.1155/2014/398457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 09/20/2014] [Accepted: 10/06/2014] [Indexed: 11/17/2022] Open
Abstract
A 68-year-old woman who suffered from C5 nerve palsy because of a C4-5 disc herniation was referred to our hospital. We conducted anterior cervical decompression and fusion (ACDF) at the C4-5 level. An intraoperative radiogram obtained after exposure of the vertebrae showed that the level at which we were going to perform surgery was exactly at the C4-5 level. After bone grafting and temporary plating, another radiogram was obtained to verify the correct placement of the plate and screws, and it appeared to show that the plate bridged the C5 and C6 vertebrae at the incorrect level. The surgeon was astonished and was about to begin decompression of the upper level. However, carefully double-checking the level with a C-arm image intensifier before additional decompression verified that the surgery was conducted correctly at C4-5. Cautiously double-checking the level of surgery with a C-arm image intensifier is recommended when intraoperative radiograms suggest surgery at the wrong level.
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Cost-effective studies in spine surgeries: a narrative review. Spine J 2014; 14:2748-62. [PMID: 24780249 DOI: 10.1016/j.spinee.2014.04.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 03/19/2014] [Accepted: 04/18/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Although the pathologic processes that affect the spine remain largely unchanged, our techniques to correct them continue to evolve with the development of novel medical and surgical interventions. Although the primary purpose of new technologies is to improve patients' quality of life, the economic impact of such therapies must be considered. PURPOSE To review the available peer-reviewed literature on spine surgery that addresses the cost-effectiveness of various treatments and technologies. STUDY DESIGN A narrative literature review. METHODS Articles published between January 1, 2000 and December 31, 2012 were selected from two Pubmed searches using keywords cost-effectiveness AND spine (216 articles) and cost analysis AND spine (358 articles). Relevant articles on cost analyses and cost-effectiveness were selected by the authors and reviewed. RESULTS Cervical and lumbar surgeries (anterior cervical discectomy and fusion, standard open lumbar discectomy, and standard posterior lumbar laminectomy) are reasonably cost effective at 2 years after the procedure (<100,000 US dollars per quality-adjusted life years gained) and become more cost effective with time because of sustained clinical improvements with relatively low additional incurred costs. The usage of transfusion avoidance technology is not cost effective because of the low risk of complications associated with allogenic transfusions. Although intraoperative neuromonitoring and imaging modalities are both cost saving and cost-effective, their cost-effectiveness is largely dependent on the baseline rate of neurologic complications and implant misplacement, respectively. More rigorous studies are needed to evaluate the cost-effectiveness of recombinant bone morphogenetic protein. CONCLUSIONS An ideal new technology should be able to achieve maximal improvement in patient health at a cost that society is willing to pay. The cost-effectiveness of technologies and treatments in spine care is dependent on their durability and the rate and severity of the baseline clinical problem that the treatment was designed to address.
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Kim SU, Roh BI, Kim SJ, Kim SD. The clinical experience of computed tomographic-guided navigation system in c1-2 spine instrumentation surgery. J Korean Neurosurg Soc 2014; 56:330-3. [PMID: 25371783 PMCID: PMC4219191 DOI: 10.3340/jkns.2014.56.4.330] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 09/15/2014] [Accepted: 09/29/2014] [Indexed: 11/27/2022] Open
Abstract
Objective To identify the accuracy and efficiency of the computed tomographic (CT)-based navigation system on upper cervical instrumentation, particularly C1 lateral mass and C2 pedicle screw fixation compared to previous reports. Methods Between May 2005 and March 2014, 25 patients underwent upper cervical instrumentation via a CT-based navigation system. Seven patients were excluded, while 18 patients were involved. There were 13 males and five females; resulting in four degenerative cervical diseases and 14 trauma cases. A CT-based navigation system and lateral fluoroscopy were used during the screw instrumentation procedure. Among the 58 screws inserted as C1-2 screws fixation, their precise positions were evaluated by postoperative CT scans and classified into three categories : in-pedicle, non-critical breach, and critical breach. Results Postoperatively, the precise positions of the C1-2 screws fixation were 81.1% (47/58), and 8.6% (5/58) were of non-critical breach, while 10.3% (6/58) were of critical breach. Most (5/6, 83.3%) of the critical breaches and all of non-critical breaches were observed in the C2 pedicle screws and there was only one case of a critical breach among the C1 lateral mass screws. There were three complications (two vertebral artery occlusions and a deep wound infection), but no postoperative instrument-related neurological deteriorations were seen, even in the critical breach cases. Conclusion Although CT-based navigation systems can result in a more precise procedure, there are still some problems at the upper cervical spine levels, where the anatomy is highly variable. Even though there were no catastrophic complications, more experience are needed for safer procedure.
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Affiliation(s)
- Sang-Uk Kim
- Department of Neurosurgery, Bucheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Bucheon, Korea
| | - Byoung-Il Roh
- Department of Neurosurgery, Bucheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Bucheon, Korea
| | - Seong-Joon Kim
- Department of Neurosurgery, Bonedream Hospital, Bucheon, Korea
| | - Sang-Don Kim
- Department of Neurosurgery, Bucheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Bucheon, Korea
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Upadhyaya CD, Wu JC, Chin CT, Balamurali G, Mummaneni PV. Avoidance of wrong-level thoracic spine surgery: intraoperative localization with preoperative percutaneous fiducial screw placement. J Neurosurg Spine 2012; 16:280-4. [PMID: 22054638 DOI: 10.3171/2011.3.spine10445] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Object
The accurate intraoperative localization of the correct thoracic spine level remains a challenging problem in both open and minimally invasive spine surgery. The authors describe a technique of using preoperatively placed percutaneous fiducial screws to localize the area of interest in the thoracic spine, and they assess the safety and efficacy of the technique.
Methods
To avoid wrong-level surgery in the thoracic spine, the authors preoperatively placed a percutaneous 5-mm fiducial screw at the level of intended surgery using CT guidance. Plain radiographs and CT images with reconstructed views can then be referenced in the operating room to verify the surgical level, and the fiducial screw is easily identified on intraoperative fluoroscopy. The authors compared a group of 26 patients who underwent preoperative (often outpatient) fiducial screw placement prior to open or minimally invasive thoracic spine surgery to a historical group of 26 patients who had intraoperative localization with fluoroscopy alone.
Results
In the treatment group of 26 patients, no complications related to fiducial screw placement occurred, and there was no incidence of wrong-level surgery. In comparison, there were no wrong-level surgeries in the historical cohort of 26 patients who underwent mini-open or open thoracic spine surgery without placement of a fiducial screw. However, the authors found that the intraoperative localization fluoroscopy time was greatly reduced when a fiducial screw localization technique was employed.
Conclusions
The aforementioned technique for intraoperative localization is safe, efficient, and accurate for identifying the target level in thoracic spine exposures. The fiducial marker screw can be placed using CT guidance on an outpatient basis. There is a reduction in the amount of intraoperative fluoroscopy time needed for localization in the fiducial screw group.
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Affiliation(s)
| | - Jau-Ching Wu
- 1Departments of Neurological Surgery and
- 2Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital; and
- 3School of Medicine and
- 4Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan
| | - Cynthia T. Chin
- 5Radiology, University of California, San Francisco, California
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