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Silverstein JW. Editorial: The History and Evolution of Intraoperative Saphenous Nerve Somatosensory Evoked Potentials: Shifting the Lexicon. Neurodiagn J 2024; 64:1-10. [PMID: 38470463 DOI: 10.1080/21646821.2024.2309128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Affiliation(s)
- Justin W Silverstein
- Clinical Assistant Professor of Neurology Department of Neurology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, New York Neuro Protective Solutions, New York, New York
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DeLong CA, Bashti M, Di L, Shah SS, Jaman E, Basil GW. Management of Refractory Post-operative Osteomyelitis and Discitis: A Case Report. Cureus 2024; 16:e52620. [PMID: 38374846 PMCID: PMC10875402 DOI: 10.7759/cureus.52620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2024] [Indexed: 02/21/2024] Open
Abstract
Vertebral osteomyelitis/discitis is a relatively rare disease but is a known potential complication of spinal surgical intervention. In general, the first-line treatment for this condition is targeted antibiotic therapy with surgical intervention only utilized in refractory cases with evidence of extensive damage, structural instability, or abscess formation. However, surgical best practices have not been established for osteomyelitis, including indications for anterior lateral interbody fusion (ALIF), posterior lateral interbody fusion (PLIF), or direct lateral interbody fusion (DLIF). This case provides a discussion of the indications that led to a direct lateral approach in the setting of refractory osteomyelitis/discitis, supporting factors that led to its success, and the efficacy of utilizing intraoperative neuromonitoring in cases of infection.
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Affiliation(s)
- Chase A DeLong
- Neurological Surgery, University of Miami Miller School of Medicine, Miami, USA
| | - Malek Bashti
- Neurological Surgery, University of Miami Miller School of Medicine, Miami, USA
| | - Long Di
- Neurological Surgery, University of Miami Miller School of Medicine, Miami, USA
| | - Sumedh S Shah
- Neurological Surgery, University of Miami Miller School of Medicine, Miami, USA
| | - Emade Jaman
- Neurological Surgery, University of Miami Miller School of Medicine, Miami, USA
| | - Gregory W Basil
- Neurological Surgery, University of Miami Miller School of Medicine, Miami, USA
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Fourman MS, Alluri RK, Sarmiento JM, Lyons KW, Lovecchio FC, Araghi K, Dalal SS, Shinn DJ, Song J, Shahi P, Melissaridou D, Carrino JA, Sheha ED, Iyer S, Dowdell JE, Qureshi SS. Female Sex and Supine Proximal Lumbar Lordosis Are Associated With the Size of the LLIF "Safe Zone" at L4-L5. Spine (Phila Pa 1976) 2023; 48:1606-1610. [PMID: 36730683 DOI: 10.1097/brs.0000000000004541] [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: 08/11/2022] [Accepted: 09/09/2022] [Indexed: 02/04/2023]
Abstract
STUDY DESIGN Retrospective chart review. OBJECTIVE Identify demographic and sagittal alignment parameters that are independently associated with femoral nerve position at the L4-L5 disk space. SUMMARY OF BACKGROUND DATA Iatrogenic femoral nerve or lumbar plexus injury during lateral lumbar interbody fusion (LLIF) can result in neurological complications. The LLIF "safe zone" is the anterior half to two third of the disk space. However, femoral nerve position varies and is inconsistently identifiable on magnetic resonance imaging. The safe zone is also narrowest at L4-L5. METHODS An analysis of patients with symptomatic lumbar spine pathology and magnetic resonance imaging with a visibly identifiable femoral nerve evaluated at a single large academic spine center from January 1, 2017, to January 8, 2020, was performed. Exclusion criteria were transitional anatomy, severe hip osteoarthritis, coronal deformity with cobb >10 degrees, > grade 1 spondylolisthesis at L4-L5 and anterior migration of the psoas.Standing and supine lumbar lordosis (LL) and its proximal (L1-L4) and distal (L4-S1) components were measured. Femoral nerve position on sagittal imaging was then measured as a percentage of the L4 inferior endplate. A stepwise multivariate linear regression of sagittal alignment and LL parameters was then performed. Data are written as estimate, 95% CI. RESULTS Mean patient age was 58.2±14.7 years, 25 (34.2%) were female and 26 (35.6%) had a grade 1 spondylolisthesis. Mean femoral nerve position was 26.6±10.3% from the posterior border of L4. Female sex (-6.6, -11.1 to -2.1) and supine proximal lumbar lordosis (0.4, 0.1-0.7) were independently associated with femoral nerve position. CONCLUSIONS Patient sex and proximal LL can serve as early indicators of the size of the femoral nerve safe zone during a transpsoas LLIF approach at L4-L5.
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Affiliation(s)
- Mitchell S Fourman
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Ram K Alluri
- Department of Orthopaedic Surgery, University of Southern California, Los Angeles, CA
| | - J Manuel Sarmiento
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Keith W Lyons
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Francis C Lovecchio
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Kasra Araghi
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Sidhant S Dalal
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Daniel J Shinn
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Junho Song
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Pratyush Shahi
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Dimitra Melissaridou
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - John A Carrino
- Department of Radiology, Hospital for Special Surgery, New York, NY
| | - Evan D Sheha
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Sravisht Iyer
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - James E Dowdell
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Sheeraz S Qureshi
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
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Reddy RP, Gorijala VK, Kaithi VR, Shandal V, Anetakis KM, Balzer JR, Crammond DJ, Shaw JD, Lee JY, Thirumala PD. Utility of transcranial motor-evoked potential changes in predicting postoperative deficit in lumbar decompression and fusion surgery: a systematic review and meta-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 2023; 32:3321-3332. [PMID: 37626247 DOI: 10.1007/s00586-023-07879-y] [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: 05/05/2023] [Revised: 07/14/2023] [Accepted: 07/29/2023] [Indexed: 08/27/2023]
Abstract
PURPOSE The primary aim of this study was to evaluate whether TcMEP alarms can predict the occurrence of postoperative neurological deficit in patients undergoing lumbar spine surgery. The secondary aim was to determine whether the various types of TcMEP alarms including transient and persistent changes portend varying degrees of injury risk. METHODS This was a systematic review and meta-analysis of the literature from PubMed, Web of Science, and Embase regarding outcomes of transcranial motor-evoked potential (TcMEP) monitoring during lumbar decompression and fusion surgery. The sensitivity, specificity, and diagnostic odds ratio (DOR) of TcMEP alarms for predicting postoperative deficit were calculated and presented with forest plots and a summary receiver operating characteristic curve. RESULTS Eight studies were included, consisting of 4923 patients. The incidence of postoperative neurological deficit was 0.73% (36/4923). The incidence of deficits in patients with significant TcMEP changes was 11.79% (27/229), while the incidence in those without changes was 0.19% (9/4694). All TcMEP alarms had a pooled sensitivity and specificity of 63 and 95% with a DOR of 34.92 (95% CI 7.95-153.42). Transient and persistent changes had sensitivities of 29% and 47%, specificities of 96% and 98%, and DORs of 8.04 and 66.06, respectively. CONCLUSION TcMEP monitoring has high specificity but low sensitivity for predicting postoperative neurological deficit in lumbar decompression and fusion surgery. Patients who awoke with new postoperative deficits were 35 times more likely to have experienced TcMEP changes intraoperatively, with persistent changes indicating higher risk of deficit than transient changes. LEVEL OF EVIDENCE II Diagnostic Systematic Review.
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Affiliation(s)
- Rajiv P Reddy
- Pittsburgh Orthopaedic Spine Research, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Vamsi K Gorijala
- Pittsburgh Orthopaedic Spine Research, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Varun R Kaithi
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Varun Shandal
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Katherine M Anetakis
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Jeffrey R Balzer
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Donald J Crammond
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Jeremy D Shaw
- Pittsburgh Orthopaedic Spine Research, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Joon Y Lee
- Pittsburgh Orthopaedic Spine Research, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Parthasarathy D Thirumala
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
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Shao M, Kruse A, Nelson P, Langer DJ, Silverstein JW. Neuromonitoring Identifies Occlusion of Femoral Artery in STA-MCA Bypass Procedure: A Case Report. Neurodiagn J 2023; 63:180-189. [PMID: 37723081 DOI: 10.1080/21646821.2023.2247952] [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: 07/11/2023] [Accepted: 08/07/2023] [Indexed: 09/20/2023]
Abstract
Intraoperative neurophysiological monitoring (IONM) is a technique used to assess the somatosensory and gross motor systems during surgery. While it is primarily used to detect and prevent surgically induced nervous system trauma, it can also detect and prevent injury to the nervous system that is the result of other causes such as trauma or ischemia that occur outside of the operative field as a result of malpositioning or other problematic physiologic states. We present a case study where a neuromonitoring alert altered the surgical procedure, though the alert was not correlated to the site of surgery. A 69-year-old male with a history of bilateral moyamoya disease and a left middle cerebral artery infarct underwent a right-sided STA-MCA bypass and encephaloduroarteriosynangiosis (EDAS) with multimodal IONM. During the procedure, the patient experienced a loss of motor evoked potential (MEP) recordings in the right lower extremity. Blood pressure was elevated, which temporarily restored the potentials, but they were lost again after the angiography team attempted to place an arterial line in the right femoral artery. The operation was truncated out of concern for left hemispheric ischemia, and it was later discovered that the patient had an acute right external iliac artery occlusion caused by a fresh thrombus in the common femoral artery causing complete paralysis of the limb. This case highlights the importance of heeding IONM alerts and evaluating for systemic causes if the alert is not thought to be of surgical etiology. IONM can detect adverse systemic neurological sequelae that is not necessarily surgically induced.
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Affiliation(s)
- Miriam Shao
- Department of Neurological Surgery Lenox Hill Hospital/Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, New York
| | - Aaron Kruse
- Department of Clinical Neurophysiology Neuro Protective Solutions, New York, New York
| | - Priscilla Nelson
- Department of Anesthesia Lenox Hill Hospital/Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, New York
| | - David J Langer
- Department of Neurological Surgery Lenox Hill Hospital/Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, New York
| | - Justin W Silverstein
- Department of Clinical Neurophysiology Neuro Protective Solutions, New York, New York
- Department of Neurology Lenox Hill Hospital/Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, New York
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Urakawa H, Sivaganesan A, Vaishnav AS, Sheha E, Qureshi SA. The Feasibility of 3D Intraoperative Navigation in Lateral Lumbar Interbody Fusion: Perioperative Outcomes, Accuracy of Cage Placement and Radiation Exposure. Global Spine J 2023; 13:737-744. [PMID: 33906453 DOI: 10.1177/21925682211006700] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
STUDY DESIGN Retrospective cohort study. OBJECTIVES To evaluate perioperative outcomes, accuracy of cage placement and radiation exposure in lateral lumbar interbody fusion (LLIF) using 3D intraoperative navigation (ION), compared to conventional 2D fluoroscopy only. METHODS The perioperative outcomes and accuracy of cage placement were examined in all patients who underwent LLIF using ION (ION group) or fluoroscopy only (non-ION group) by a single surgeon. The radiation exposure was examined in patients who underwent stand-alone LLIF. RESULTS A total of 87 patients with 154 levels (ION 49 patients with 79 levels/ non-ION 38 patients with 75 levels) were included. There were no significant differences in operative time (ION 143.5 min vs. non-ION 126.0 min, P = .406), time from induction end to surgery start (ION 31.0 min vs. non-ION 31.0 min, P = .761), estimated blood loss (ION 37.5 ml vs. non-ION 50.0 ml, P = .351), perioperative complications (ION 16.3% vs. non-ION 7.9%, P = .335) and length of stay (ION 50.6 hours vs. non-ION 41.7 hours, P = .841). No significant difference was found in the accuracy of cage placement (P = .279). ION did not significantly increase total radiation dose (ION 51.0 mGy vs. non-ION 47.4 mGy, P = .237) and tended to reduce radiation dose during the procedure (ION 32.2 mGy vs. non-ION 47.4 mGy, P = .932). CONCLUSIONS The perioperative outcomes, accuracy of cage placement and radiation exposure in LLIF using ION were comparable to those using fluoroscopy only. The use of ION in LLIF was feasible, safe and accurate and may reduce radiation dose to the surgeon and surgical team.
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Affiliation(s)
| | | | | | - Evan Sheha
- 25062Hospital for Special Surgery, New York, NY, USA
- Weill Cornell Medical College, New York, NY, USA
| | - Sheeraz A Qureshi
- 25062Hospital for Special Surgery, New York, NY, USA
- Weill Cornell Medical College, New York, NY, USA
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7
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Allison DW, Hayworth MK, Nader R, Ballman M, Sun D, Ninan R, Southern E. Intraoperative transabdominal MEPs: four case reports. J Clin Monit Comput 2023; 37:689-698. [PMID: 35999343 DOI: 10.1007/s10877-022-00903-4] [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: 01/10/2022] [Accepted: 07/27/2022] [Indexed: 11/28/2022]
Abstract
Four recent cases utilizing transabdominal motor-evoked potentials (TaMEPs) are presented as illustrative of the monitoring technique during lumbosacral fusion, sciatic nerve tumor resection, cauda equina tumor resection, and lumbar decompression. Case 1: In a high-grade lumbosacral spondylolisthesis revision fusion, both transcranial motor-evoked potentials (TcMEPs) and TaMEPs detected a transient focal loss of left tibialis anterior response in conjunction with L5 nerve root decompression. Case 2: In a sciatic nerve tumor resection, TcMEPs responses were lost but TaMEPs remained unchanged, the patient was neurologically intact postoperatively. Case 3: TaMEPs were acquired during an L1-L3 intradural extramedullary cauda equina tumor resection utilizing a unique TaMEP stimulation electrode. Case 4: TaMEPs were successfully acquired with little anesthetic fade utilizing an anesthetic regimen of 1.1 MAC Sevoflurane during a lumbar decompression. While the first two cases present TaMEPs and TcMEPs side-by-side, demonstrating TaMEPs correlating to TcMEPs (Case 1) or a more accurate reflection of patient outcome (Case 2), no inference regarding the accuracy of TaMEPs to monitor nerve elements during cauda equina surgery (Cases 3) or the lumbar decompression presented in Case 4 should be made as these are demonstrations of technique, not utility.
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Affiliation(s)
- David W Allison
- Department of Neurophysiology, Houston Methodist Hospital, 6565 Fannin St., Houston, TX, 77030, USA.
| | - Miranda K Hayworth
- Department of Neurosurgery, University of Texas Medical Branch, 1005 Harborside Drive, Galveston, TX, 77555, USA
| | - Remi Nader
- Department of Neurosurgery, University of Texas Medical Branch, 1005 Harborside Drive, Galveston, TX, 77555, USA
| | - Melodie Ballman
- Medsurant Health, 100 Front Street, Suite 280, West Conshohoken, PA, 19428, USA
| | - Derrick Sun
- Department of Neurosurgery, Houston Methodist Healthcare System, 6560 Fannin St., Houston, TX, 77030, USA
| | - Rony Ninan
- Department of Neurology, Houston Methodist Healthcare System, 6560 Fannin St., Houston, TX, 77030, USA
| | - Edward Southern
- Department of Orthopedic Surgery, University of Texas Medical Branch, 1005 Harborside Drive, Galveston, TX, 77555, USA
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8
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Alluri RK, Vaishnav AS, Sivaganesan A, Ricci L, Sheha E, Qureshi SA. Multimodality Intraoperative Neuromonitoring in Lateral Lumbar Interbody Fusion: A Review of Alerts in 628 Patients. Global Spine J 2023; 13:466-471. [PMID: 33733881 PMCID: PMC9972257 DOI: 10.1177/21925682211000321] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
STUDY DESIGN Retrospective review of private neuromonitoring databases. OBJECTIVES To review neuromonitoring alerts in a large series of patients undergoing lateral lumbar interbody fusion (LLIF) and determine whether alerts occurred more frequently when more lumbar levels were accessed or more frequently at particular lumbar levels. METHODS Intraoperative neuromonitoring (IONM) databases were reviewed and patients were identified undergoing LLIF between L1 and L5. All cases in which at least one IONM modality was used (motor evoked potentials (MEP), somatosensory evoked potentials (SSEP), evoked electromyography (EMG)) were included in this study. The type of IONM used and incidence of alerts were collected from each IONM report and analyzed. The incidence of alerts for each IONM modality based on number of levels at which at LLIF was performed and the specific level an LLIF was performed were compared. RESULTS A total of 628 patients undergoing LLIF across 934 levels were reviewed. EMG was used in 611 (97%) cases, SSEP in 561 (89%), MEP in 144 (23%). The frequency of IONM alerts for EMG, SSEP and MEPs did not significantly increase as the number of LLIF levels accessed increased. No EMG, SSEP, or MEP alerts occurred at L1-L2. EMG alerts occurred in 2-5% of patients at L2-L3, L3-L4, and L4-L5 and did not significantly vary by level (P = .34). SSEP and MEP alerts occurred more frequently at L4-L5 versus L2-L3 and L3-L4 (P < .03). CONCLUSIONS IONM may provide the greatest utility at L4-L5, particularly MEPs, and may not be necessary for more cephalad LLIF procedures such as at L1-L2.
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Affiliation(s)
| | | | | | - Luke Ricci
- Hospital for Special Surgery, New York, NY, USA
| | - Evan Sheha
- Hospital for Special Surgery, New York, NY, USA,Weill Cornell Medical College, New York, NY,
USA
| | - Sheeraz A. Qureshi
- Hospital for Special Surgery, New York, NY, USA,Weill Cornell Medical College, New York, NY,
USA,Sheeraz A Qureshi, Hospital for Special Surgery,
535 E. 70th St, New York, NY, 10021, USA.
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9
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Michael M, Stark M, Woods B. Effectiveness of Intraoperative Neuromonitoring in a Patient Undergoing a One-Level Transforaminal Lumbar Interbody Fusion: A Case Report. Cureus 2023; 15:e35580. [PMID: 37007300 PMCID: PMC10062402 DOI: 10.7759/cureus.35580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Posterior lumbar interbody fusion (PLIF) and transforaminal lumbar interbody fusion (TLIF) are common modes of operative treatment of lumbar radiculopathy and spondylolisthesis. An integral part of these procedures is the appropriate placement of pedicle screws to ensure proper fusion. Breach of the medial cortex during pedicle screw fixation can potentially cause permanent impairment for a patient; significant technology and resources have been universally devoted to preventing this complication. Intraoperative neuromonitoring (IONM) is a frequently used tool by spine surgeons, which, along with fluoroscopy, is traditionally thought to reduce the incidence of neurologic injury. Unfortunately, IONM is not infallible and, in certain studies, has not been shown to decrease the risk of neurologic compromise. This case presentation details the clinical course of a 55-year-old who underwent an L4-5 TLIF. Despite benign electromyography recordings intraoperatively, the patient presented postoperatively with a new-onset left foot drop and a CT scan that confirmed bilateral L4 screw malposition with a breach of the medial cortex. We hope to further advance the discussion regarding the dangerous inconsistency of IONM in hopes of identifying a multimodal approach to avoid dreaded complications like this one in the future.
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Zheng B, Leary OP, Beer RA, Liu DD, Nuss S, Barrios-Anderson A, Darveau S, Syed S, Gokaslan ZL, Telfeian AE, Oyelese AA, Fridley JS. Long-Term Motor versus Sensory Lumbar Plexopathy After Lateral Lumbar Interbody Fusion: Single-Center Experience, Intraoperative Neuromonitoring Results, and Multivariate Analysis of Patient-Level Predictors. World Neurosurg 2023; 170:e568-e576. [PMID: 36435383 DOI: 10.1016/j.wneu.2022.11.071] [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: 10/16/2022] [Accepted: 11/15/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Although lateral lumbar interbody fusion (LLIF) is an effective surgical option for lumbar arthrodesis, postoperative plexopathies are a common complication. We characterized post-LLIF plexopathies in a large cohort and analyzed potential risk factors for each. METHODS A single-institutional cohort who underwent LLIF between May 2015 and December 2019 was retrospectively reviewed for postoperative lumbar plexopathies. Plexopathies were divided based on sensory and motor symptoms and duration, as well as by laterality relative to the surgical approach. We assessed these subgroups for associations with patient and surgical characteristics as well as psoas dimensions. We then evaluated risk of developing plexopathies after intraoperative neuromonitoring observations. RESULTS A total of 127 patients were included. The overall rate of LLIF-induced sensory or motor lumbar plexopathy was 37.8% (48/127). Of all cases, 42 were ipsilateral to the surgical approach (33.1%); conversely, 6 patients developed contralateral plexopathies (4.7%). Most (31/48; 64.6%) resolved with a follow-up interval of 402 days in the plexopathy group. Of ipsilateral cases, 24 patients experienced persistent (>90 days) postoperative sensory symptoms (18.9%), whereas 20 experienced persistent weakness (15.7%). More levels fused predicted persistent sensory symptoms (odds ratio, 1.714 [1.246-2.359]; P = 0.0085), whereas surgical duration predicted persistent weakness (odds ratio, 1.004 [1.002-1.006]; P = 0.0382). Psoas anatomic variables were not significantly associated with plexopathy. Nonresolution of intraoperative evoked motor potential alerts was a significant risk factor for developing plexopathies (relative risk, 2.29 [1.17-4.45]). CONCLUSIONS Post-LLIF plexopathies are common but usually resolve. Surgical complexity and unresolved neuromonitoring alerts are possible risk factors for persistent plexopathy.
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Affiliation(s)
- Bryan Zheng
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA.
| | - Owen P Leary
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Robert A Beer
- SpecialtyCare, Inc., Southern New England Intraoperative Neuromonitoring, Providence, Rhode Island, USA
| | - David D Liu
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Sarah Nuss
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Adriel Barrios-Anderson
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Spencer Darveau
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Sohail Syed
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Ziya L Gokaslan
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Albert E Telfeian
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Adetokunbo A Oyelese
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Jared S Fridley
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
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Kim YH, Ha KY, Kim YS, Kim KW, Rhyu KW, Park JB, Shin JH, Kim YY, Lee JS, Park HY, Ko J, Kim SI. Lumbar Interbody Fusion and Osteobiologics for Lumbar Fusion. Asian Spine J 2022; 16:1022-1033. [PMID: 36573302 PMCID: PMC9827209 DOI: 10.31616/asj.2022.0435] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 12/28/2022] Open
Abstract
Lumbar interbody fusion (LIF) is an excellent treatment option for a number of lumbar diseases. LIF can be performed through posterior, transforaminal, anterior, and lateral or oblique approaches. Each technique has its own pearls and pitfalls. Through LIF, segmental stabilization, neural decompression, and deformity correction can be achieved. Minimally invasive surgery has recently gained popularity and each LIF procedure can be performed using minimally invasive techniques to reduce surgery-related complications and improve early postoperative recovery. Despite advances in surgical technology, surgery-related complications after LIF, such as pseudoarthrosis, have not yet been overcome. Although autogenous iliac crest bone graft is the gold standard for spinal fusion, other bone substitutes are available to enhance fusion rate and reduce complications associated with bone harvest. This article reviews the surgical procedures and characteristics of each LIF and the osteobiologics utilized in LIF based on the available evidence.
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Affiliation(s)
- Young-Hoon Kim
- Department of Orthopaedic Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kee-Yong Ha
- Department of Orthopaedic Surgery, Kyung Hee University Hospital at Gangdong, Seoul, Korea
| | - Youn-Soo Kim
- Department of Orthopaedic Surgery, Bucheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Bucheon, Korea
| | - Ki-Won Kim
- Department of Orthopaedic Surgery, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kee-Won Rhyu
- Department of Orthopaedic Surgery, St. Vincent Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
| | - Jong-Beom Park
- Department of Orthopaedic Surgery, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - Jae-Hyuk Shin
- Department of Orthopaedic Surgery, St. Vincent Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
| | - Young-Yul Kim
- Department of Orthopaedic Surgery, Daejeon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Korea
| | - Jun-Seok Lee
- Department of Orthopaedic Surgery, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyung-Youl Park
- Department of Orthopaedic Surgery, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jaeryong Ko
- Department of Orthopaedic Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sang-Il Kim
- Department of Orthopaedic Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea,Corresponding author: Sang-Il Kim Department of Orthopaedic Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222 Banpodaero, Seocho-gu, Seoul 06591, Korea Tel: +82-2-2258-6775, Fax: +82-2-535-9837, E-mail:
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12
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Intraoperative Monitoring During Neurosurgical Procedures and Patient Outcomes. CURRENT ANESTHESIOLOGY REPORTS 2022. [DOI: 10.1007/s40140-022-00542-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Neuromonitoring in Lateral Interbody Fusion: A Systematic Review. World Neurosurg 2022; 168:268-277.e1. [DOI: 10.1016/j.wneu.2022.10.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/07/2022] [Accepted: 10/08/2022] [Indexed: 11/06/2022]
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Feng L, Zhang X, Guo D, Li C, Qi X, Bai Y, Cao J, Sun B, Yao Z, Gao J, Cui L, Guo L. Utilization of intraoperative neuromonitoring during the Woodward procedure for treatment of Sprengel deformity. J Shoulder Elbow Surg 2022; 31:e405-e412. [PMID: 35121118 DOI: 10.1016/j.jse.2021.12.040] [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] [Received: 07/06/2021] [Revised: 12/18/2021] [Accepted: 12/25/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND Brachial plexus injury (BPI) leading to palsy of the upper extremities is the most serious complication of the Woodward procedure for treatment of Sprengel deformity. Intraoperative neuromonitoring (IONM) is widely used for detecting emerging spinal cord or peripheral nerve injury during spinal and shoulder surgery. However, to date, its utilization in pediatric patients with Sprengel deformity is limited. Furthermore, it remains unclear whether IONM can help prevent BPI during surgery. The purpose of the current study was to assess the feasibility and effectiveness of IONM for early identification and prevention of nerve injury during the Woodward procedure. METHODS We retrospectively reviewed the records of patients who underwent the Woodward procedure for Sprengel deformity at our institution between January 2017 and January 2020. IONM, including somatosensory evoked potentials (SEP) and motor evoked potentials (MEPs), was performed in all patients. Detailed IONM data were collected and analyzed. Preoperative and postoperative cosmetic appearance (according to the Cavendish classification), shoulder joint abduction function, and radiologic evaluation of the scapula were reviewed. Surgical complications were recorded. RESULTS Forty-six patients (19 girls, 27 boys) were included (mean age, 5.1 ± 2.1 years). Both SEP and MEP (amplitude of the abductor pollicis) were successfully performed (100%). MEP alerts occurred in 3 patients (6.5%). After scapula position adjustment, signals recovered in 2 patients and remained unchanged in 1 patient-this patient exhibited postoperative motor deficits that resolved completely by 4 months recovery. The SEP amplitudes decreased in all 3 patients but did not reach the warning criteria. Forty patients were classified as grade III and 6 as grade IV in the Cavendish classification, whereas 35 patients were classified as grade II and 11 as grade III in the Rigault scale. The preoperative Cavendish grade was III (III, IV) and the postoperative Cavendish grade was I (I, II) (χ2 = 88.098, P < .001). The preoperative Rigault grade was II (II, III) and the postoperative Rigault grade was I (I, II) (χ2 = 62.133, P < .001). The mean arc of shoulder joint abduction improved from 99° ± 8° to 167° ± 7° (t = -45.871, P < .001) after surgery. Except for temporary motor deficits detected in 1 patient, no other postoperative complications were observed through the time of final follow-up. CONCLUSION IONM during the Woodward procedure for Sprengel deformity is feasible and effective in detecting intraoperative neurologic changes and may be effective in preventing BPI associated with surgery.
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Affiliation(s)
- Lei Feng
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Xuejun Zhang
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.
| | - Dong Guo
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Chengxin Li
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Xinyu Qi
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Yunsong Bai
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jun Cao
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Baosheng Sun
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Ziming Yao
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jingchun Gao
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Lanyue Cui
- Department of Orthopaedics, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Lanjun Guo
- Department of Surgical Neuromonitoring, University of California, San Francisco, CA, USA
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15
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Tohmeh A, Somers C, Howell K. Saphenous somatosensory-evoked potentials monitoring of femoral nerve health during prone transpsoas lateral lumbar interbody fusion. 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; 31:1658-1666. [PMID: 35532816 DOI: 10.1007/s00586-022-07224-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 12/30/2021] [Accepted: 04/12/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE To assess whether saphenous somatosensory-evoked potentials (saphSSEP) monitoring may provide predictive information of femoral nerve health during prone lateral interbody fusion (LIF) procedures. METHODS Intraoperative details were captured prospectively in consecutive prone LIF surgeries at a single institution. Triggered electromyography was used during the approach; saphSSEP was monitored throughout using a novel system that enables acquisition of difficult signals and real-time actionable feedback facilitating intraoperative intervention. Postoperative neural function was correlated with intraoperative findings. RESULTS Fifty-nine patients (58% female, mean age 64, mean BMI 32) underwent LIF at 95 total levels, inclusive of L4-5 in 76%, fixated via percutaneous pedicle screws (81%) or lateral plate, with direct decompression in 39%. Total operative time averaged 149 min. Psoas retraction time averaged 16 min/level. Baseline SSEPs were unreliable in 3 due to comorbidities in 2 and anesthesia in 1; one of those resulted in transient quadriceps weakness, fully recovered at 6 weeks. In 25/56, no saphSSEP changes occurred, and none had postoperative femoral nerve deficits. In 24/31 with saphSSEP changes, responses recovered intraoperatively following intervention, with normal postoperative function in all but one with delayed quadriceps weakness, improved at 4 months and recovered at 9 months, and a second with transient isolated anterior thigh numbness. In the remaining 7/31, saphSSEP changes persisted to close, and resulted in 2 transient isolated anterior thigh numbness and 2 combined sensory and motor femoral nerve deficits, both resolved at between 4 and 8 months. CONCLUSIONS SaphSSEP was reliably monitored in most cases and provided actionable feedback that was highly predictive of neurological events during LIF. LEVEL OF EVIDENCE Diagnostic: individual cross-sectional studies with consistently applied reference standard and blinding.
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Affiliation(s)
- Antoine Tohmeh
- MultiCare Neurosurgery and Spine, 605 E. Holland, Suite 202, Spokane, WA, 99218, USA.
| | - Cheri Somers
- MultiCare Neurosurgery and Spine, 605 E. Holland, Suite 202, Spokane, WA, 99218, USA
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16
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Malham GM, Hamer RP, Biddau DT, Munday NR. Do evoked potentials matter? Pre-pathologic signal change and clinical outcomes with expandable cages in lateral lumbar interbody fusion surgery. J Clin Neurosci 2022; 98:248-253. [PMID: 35220141 DOI: 10.1016/j.jocn.2022.02.023] [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: 12/16/2021] [Revised: 02/14/2022] [Accepted: 02/16/2022] [Indexed: 10/19/2022]
Abstract
Minimally Invasive Lateral Lumbar Interbody Fusion (MIS LLIF) is a reliable technique for treatment of degenerative disk disease, foraminal stenosis and spinal deformity. The retroperitoneal transpsoas approach risks lumbar plexus injury that may result in anterior thigh pain, sensory loss and weakness. A prospective study of 64 consecutive patients undergoing MIS LLIF with expandable cages (23 standalone, 41 integrated with lateral plate) using multimodal electrophysiological monitoring was performed. We measured sequential retraction times, complications, patient reported outcome scores and electrophysiologic findings with a minimum 12-month follow-up. Incidence of evoked potential and electromyographic signal change was moderate, and rarely resulted in post-operative neurologic deficit. Evoked potential signal changes were frequently resolved by the un-breaking of the surgical table or repositioning of the retractor. Average retraction times were 24 (15-41) minutes for standalone cages and 30 (15-41) minutes for integrated cages. At follow-up, the vast majority (97%) of patients reported significant clinical improvement post-operatively with only 2 patients reporting postoperative neurologic symptoms and subsequent recovery at 12-months. The present study shows that evoked potentials combined with electromyography is a more sensitive measure of pre-pathologic lumbar plexopathy in LLIF compared to electromyography alone, especially at L3/4 and L4/5 levels. Based on our findings, there is limited clinical indication for routine neural monitoring at rostral lumbar levels. The routine inclusion of multimodal electrophysiological monitoring in lateral transpsoas surgery is recommended to minimise the risk of neural injury by enabling optimal patient and retractor positioning and continued surveillance throughout the procedure.
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Affiliation(s)
- Gregory M Malham
- Neuroscience Institute, Epworth Hospital, Melbourne, VIC, Australia; Swinburne Institute of Technology, Melbourne, VIC, Australia.
| | - Ryan P Hamer
- Faculty of Medicine & Health, University of Sydney, Sydney, NSW, Australia
| | - Dean T Biddau
- Swinburne Institute of Technology, Melbourne, VIC, Australia
| | - Nigel R Munday
- Neuroscience Institute, Epworth Hospital, Melbourne, VIC, Australia
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Silverstein JW, Block J, Smith ML, Bomback DA, Sanderson S, Paul J, Ball H, Ellis JA, Goldstein M, Kramer DL, Arutyunyan G, Marcus J, Mermelstein S, Slosar P, Goldthwaite N, Lee SI, Reynolds J, Riordan M, Pirnia N, Kunwar S, Abbi G, Bizzini B, Gupta S, Porter D, Mermelstein LE. Femoral nerve neuromonitoring for lateral lumbar interbody fusion surgery. Spine J 2022; 22:296-304. [PMID: 34343664 DOI: 10.1016/j.spinee.2021.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/26/2021] [Accepted: 07/26/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT The transpsoas lateral lumbar interbody fusion (LLIF) technique is an effective alternative to traditional anterior and posterior approaches to the lumbar spine; however, nerve injuries are the most reported postoperative complication. Commonly used strategies to avoid nerve injury (eg, limiting retraction duration) have not been effective in detecting or preventing femoral nerve injuries. PURPOSE To evaluate the efficacy of emerging intraoperative femoral nerve monitoring techniques and the importance of employing prompt surgical countermeasures when degraded femoral nerve function is detected. STUDY DESIGN/SETTING We present the results from a retrospective analysis of a multi-center study conducted over the course of 3 years. PATIENT SAMPLE One hundred and seventy-two lateral lumbar interbody fusion procedures were reviewed. OUTCOME MEASURES Intraoperative femoral nerve monitoring data was correlated to immediate postoperative neurologic examinations. METHODS Femoral nerve evoked potentials (FNEP) including saphenous nerve somatosensory evoked potentials (snSSEP) and motor evoked potentials with quadriceps recordings were used to detect evidence of degraded femoral nerve function during the time of surgical retraction. RESULTS In 89% (n=153) of the surgeries, there were no surgeon alerts as the FNEP response amplitudes remained relatively unchanged throughout the surgery (negative group). The positive group included 11% of the cases (n=19) where the surgeon was alerted to a deterioration of the FNEP amplitudes during surgical retraction. Prompt surgical countermeasures to an FNEP alert included loosening, adjusting, or removing surgical retraction, and/or requesting an increase in blood pressure from the anesthesiologist. All the cases where prompt surgical countermeasures were employed resulted in recovery of the degraded FNEP amplitudes and no postoperative femoral nerve injuries. In two cases, the surgeons were given verbal alerts of degraded FNEPs but did not employ prompt surgical countermeasures. In both cases, the degraded FNEP amplitudes did not recover by the time of surgical closure, and both patients exhibited postoperative signs of sensorimotor femoral nerve injury including anterior thigh numbness and weakened knee extension. CONCLUSIONS Multimodal femoral nerve monitoring can provide surgeons with a timely alert to hyperacute femoral nerve conduction failure, enabling prompt surgical countermeasures to be employed that can mitigate or avoid femoral nerve injury. Our data also suggests that the common strategy of limiting retraction duration may not be effective in preventing iatrogenic femoral nerve injuries.
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Affiliation(s)
- Justin W Silverstein
- Neuro Protective Solutions, New York, NY 11788, USA; Northwell Health Lenox Hill Hospital, New York, NY, USA; Northwell Health Huntington Hospital, Huntington, NY, USA.
| | - Jon Block
- ION Intraoperative Neurophysiology, Orinda, CA, USA
| | - Michael L Smith
- Rothman Orthopedic Institute, New York, NY, USA; Northwell Health Lenox Hill Hospital, New York, NY, USA
| | - David A Bomback
- Connecticut Neck and Back Specialists, Danbury, CT, USA; Nuvance Health, Danbury, CT, USA
| | - Scott Sanderson
- Elite Brain and Spine of Connecticut, Danbury CT, USA; Nuvance Health, Danbury, CT, USA
| | - Justin Paul
- OrthoConnecticut, Danbury CT, USA; Nuvance Health, Danbury, CT, USA
| | - Hieu Ball
- San Ramone Regional Medical Center, San Ramon, CA, USA
| | - Jason A Ellis
- Northwell Health Lenox Hill Hospital, New York, NY, USA
| | - Matthew Goldstein
- Orthopedic Associates of Manhasset, Great Neck, NY, USA; St. Francis Hospital, Roslyn, NY, USA
| | - David L Kramer
- Connecticut Neck and Back Specialists, Danbury, CT, USA; Nuvance Health, Danbury, CT, USA
| | - Grigoriy Arutyunyan
- Rothman Orthopedic Institute, New York, NY, USA; Northwell Health Lenox Hill Hospital, New York, NY, USA
| | - Joshua Marcus
- Elite Brain and Spine of Connecticut, Danbury CT, USA; Nuvance Health, Danbury, CT, USA
| | - Sara Mermelstein
- New York Institute of Technology College of Osteopathic Medicine, Old Westbury, NY, USA
| | | | | | | | | | | | | | | | | | | | - Sarita Gupta
- ION Intraoperative Neurophysiology, Orinda, CA, USA
| | | | - Laurence E Mermelstein
- Long Island Spine Specialists, Long Island, NY, USA; Northwell Health Huntington Hospital, Huntington, NY, USA
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Skinner S, Guo L. Intraoperative neuromonitoring during surgery for lumbar stenosis. HANDBOOK OF CLINICAL NEUROLOGY 2022; 186:205-227. [PMID: 35772887 DOI: 10.1016/b978-0-12-819826-1.00005-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The indications for neuromonitoring during lumbar stenosis surgery are defined by the risks associated with patient positioning, the approach, decompression of neural elements, deformity correction, and instrument implantation. The routine use of EMG and SEP alone during lumbar stenosis surgery is no longer supported by the literature. Lateral approach neuromonitoring with EMG only is also suspect. Lumbar stenosis patients often present with multiple co-morbidities which put them at risk during routine pre-surgical positioning. Frequently encountered morbid obesity and/or diabetes mellitus may play a role in monitorable and preventable brachial plexopathy after "superman" positioning or femoral neuropathy from groin pressure after prone positioning, for example. Deformity correction in lumbar stenosis surgery often demands advanced implementation of multiple neuromonitoring modalities: EMG, SEP, and MEP. Because the bulbocavernosus reflex detects the function of the conus medullaris and sacral somato afferent/efferent fibers of the cauda equina, it may also be recorded. The recommendation to record pedicle screw thresholds has become more nuanced as surgeon dependence on 3D imaging, navigation, and robotics has increased. Neuromonitoring in lumbar stenosis surgery has been subject mainly to uncontrolled case series; prospective cohort trials are also needed.
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Affiliation(s)
- Stanley Skinner
- Department of Intraoperative Neurophysiology, Abbott Northwestern Hospital, Minneapolis, MN, United States.
| | - Lanjun Guo
- Department of Surgical Neuromonitoring, University of California San Francisco, San Francisco, CA, United States
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Diagnostic Accuracy of SSEP Changes During Lumbar Spine Surgery for Predicting Postoperative Neurological Deficit: A Systematic Review and Meta-Analysis. Spine (Phila Pa 1976) 2021; 46:E1343-E1352. [PMID: 33958542 DOI: 10.1097/brs.0000000000004099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN This study is a meta-analysis of prospective and retrospective studies identified in PubMed, Web of Science, and Embase with outcomes of patients who received intraoperative somatosensory-evoked potential (SSEP) monitoring during lumbar spine surgery. OBJECTIVE The objective of this study is to determine the diagnostic accuracy of intraoperative lower extremity SSEP changes for predicting postoperative neurological deficit. As a secondary analysis, we evaluated three subtypes of intraoperative SSEP changes: reversible, irreversible, and total signal loss. SUMMARY OF BACKGROUND DATA Lumbar decompression and fusion surgery can treat lumbar spinal stenosis and spondylolisthesis but carry a risk for nerve root injury. Published neurophysiological monitoring guidelines provide no conclusive evidence for the clinical utility of intraoperative SSEP monitoring during lumbar spine surgery. METHODS A systematic review was conducted to identify studies with outcomes of patients who underwent lumbar spine surgeries with intraoperative SSEP monitoring. The sensitivity, specificity, and diagnostic odds ratio (DOR) were calculated and presented with forest plots and a summary receiver operating characteristic curve. RESULTS The study cohort consisted of 5607 patients. All significant intraoperative SSEP changes had a sensitivity of 44% and specificity of 97% with a DOR of 22.13 (95% CI, 11.30-43.34). Reversible and irreversible SSEP changes had sensitivities of 28% and 33% and specificities of 97% and 97%, respectively. The DORs for reversible and irreversible SSEP changes were 13.93 (95% CI, 4.60-40.44) and 57.84 (95% CI, 15.95-209.84), respectively. Total loss of SSEPs had a sensitivity of 9% and specificity of 99% with a DOR of 23.91 (95% CI, 7.18-79.65). CONCLUSION SSEP changes during lumbar spine surgery are highly specific but moderately sensitive for new postoperative neurological deficits. Patients who had postoperative neurological deficit were 22 times more likely to have exhibited intraoperative SSEP changes.Level of Evidence: 2.
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20
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Wang Y, Zhao X, Geng B, Sheng X, Zhang K, Cao C, Xia Y, Chen S. Application of Triggered EMG in the Intraoperative Neurophysiological Monitoring of Posterior Percutaneous Endoscopic Cervical Discectomy. Orthop Surg 2021; 13:2236-2245. [PMID: 34668326 PMCID: PMC8654663 DOI: 10.1111/os.13092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVE To describe the rationale and application of triggered EMG (T-EMG) in intraoperative neurophysiological monitoring, and to explore the efficacy and safety of posterior percutaneous endoscopic cervical discectomy (PPECD) in the treatment of cervical spondylotic radiculopathy (CSR) under multimodal intraoperative neurophysiological monitoring (IOM). METHODS This study was a retrospective cohort control study. The clinical data of 74 patients with single-segment CSR from June 2015 to August 2018 were analyzed retrospectively, of whom 35 underwent IOM-assisted PPECD with triggered EMG (T-EMG group), while 39 were subjected to IOM-assisted PPECD alone (IOM group). Operation time, hospital stay, and complications were recorded for both groups. The curative effect was evaluated according to the Visual Analog Scale (VAS) of neck and arm pain, Japanese Orthopaedic Association (JOA) score, and modified MacNab scale. RESULTS Operations were successful and all patients were followed up for at least 24 (average 31.77 ± 9.51) months with no patient lost to follow-up. No significant difference was found in preoperative baseline data between the T-EMG and the IOM group (P > 0.05). Also, no significant difference was found in the operation time between the T-EMG (108.29 ± 11.44 min) and the IOM (110.13 ± 12.70 min) (P > 0.05) group, but the difference in hospital stay (T-EMG: 5.66 ± 0.99 days; IOM: 7.10 ± 1.43 days) was statistically significant (P < 0.05). The VAS for the neck and upper limbs in the two groups at 1 month post-operation (T-EMG: 2.09 ± 1.07, 2.26 ± 0.92; IOM:2.18 ± 1.05, 2.31 ± 0.77) and the last follow-up (T-EMG: 0.83 ± 0.62, 0.86 ± 0.55; IOM: 0.90 ± 0.50, 0.87 ± 0.61) were significantly different from the preoperative scores (T-EMG: 6.14 ± 1.09, 7.17 ± 1.04; IOM: 6.18 ± 1.28, 7.15 ± 1.23) (P < 0.05). However, no significant difference was found between the two groups (P > 0.05). The 1-month postoperative JOA scores for the two groups (12.69 ± 0.76; 12.59 ± 0.82) and those at the last follow-up (14.60 ± 0.77; 14.36 ± 0.78) were significantly different from the preoperative scores (11.09 ± 0.98; 11.05 ± 0.89) (P < 0.05), but the difference between the two groups was not significant (P > 0.05). One patient in the T-EMG group developed a transient aggravation of symptoms on the first day after surgery. In the IOM group, three patients had intraoperative cerebrospinal fluid leakage, and symptoms of C5 nerve root paralysis were presented in four patients following surgery. Compared with the IOM group, the T-EMG group had fewer complications (1/35; 7/39, P < 0.05). At the last follow-up, the modified MacNab criteria were 91.43% (32/35) and 89.7% (35/39) for the T-EMG group and IOM group, respectively. CONCLUSIONS Triggered EMG prevents the occurrence of neurological complications, which not only aids PPECD for CSR treatment in achieving satisfactory results, but also reduces average hospital stay and complication rates.
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Affiliation(s)
- Yao‐bin Wang
- Department of OrthopaedicsLanzhou University Second HospitalLanzhouChina
- Gansu Provincial Orthopaedic Clinical Medicine Research CenterLanzhouChina
- Key Laboratory of Bone and Joint Disease Research of Gansu ProvinceLanzhouChina
- Department of Spinal and Spinal Cord surgeryHenan Provincial People's HospitalZhengzhouChina
| | - Xiao‐bing Zhao
- Department of OrthopaedicsLanzhou University Second HospitalLanzhouChina
- Gansu Provincial Orthopaedic Clinical Medicine Research CenterLanzhouChina
- Key Laboratory of Bone and Joint Disease Research of Gansu ProvinceLanzhouChina
| | - Bin Geng
- Department of OrthopaedicsLanzhou University Second HospitalLanzhouChina
- Gansu Provincial Orthopaedic Clinical Medicine Research CenterLanzhouChina
- Key Laboratory of Bone and Joint Disease Research of Gansu ProvinceLanzhouChina
| | - Xiao‐yun Sheng
- Department of OrthopaedicsLanzhou University Second HospitalLanzhouChina
- Gansu Provincial Orthopaedic Clinical Medicine Research CenterLanzhouChina
- Key Laboratory of Bone and Joint Disease Research of Gansu ProvinceLanzhouChina
| | - Kai Zhang
- Department of Spinal and Spinal Cord surgeryHenan Provincial People's HospitalZhengzhouChina
| | - Chen Cao
- Department of Spinal and Spinal Cord surgeryHenan Provincial People's HospitalZhengzhouChina
| | - Ya‐yi Xia
- Department of OrthopaedicsLanzhou University Second HospitalLanzhouChina
- Gansu Provincial Orthopaedic Clinical Medicine Research CenterLanzhouChina
- Key Laboratory of Bone and Joint Disease Research of Gansu ProvinceLanzhouChina
| | - Shu‐lian Chen
- Department of Spinal and Spinal Cord surgeryHenan Provincial People's HospitalZhengzhouChina
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21
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Chen Y, Luo C, Wang J, Liu L, Huang B, Li CQ, Zhou Y, Feng C. Roles of multimodal intra-operative neurophysiological monitoring (IONM) in percutaneous endoscopic transforaminal lumbar interbody fusion: a case series of 113 patients. BMC Musculoskelet Disord 2021; 22:989. [PMID: 34836537 PMCID: PMC8627103 DOI: 10.1186/s12891-021-04824-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 10/27/2021] [Indexed: 12/04/2022] Open
Abstract
Background Despite the wide use of intraoperative neurophysiological monitoring (IONM) in spinal surgeries, the efficacy of IONM during percutaneous endoscopic transforaminal lumbar interbody fusion (PE-TLIF) surgery in detecting postoperative neurological deficits has not been well characterized. Methods MIONM data from 113 consecutive patients who underwent PE-TLIF surgeries between June 2018 and April 2020 were retrospectively reviewed. Postoperative neurological deficits were documented and analyzed, and the efficacy and specificity of various IONM techniques were compared. Results Of the 113 consecutive patients, 12 (10.6%) with IONM alerts were identified. The MIONM sensitivity and specificity were 100 and 96.2%, respectively. The frequency of neurological complications, including minor deficits, was 6.2% (n = 7); all of the neurological complications were temporary. The ability of single IONM modalities to detect neurological complications varied between 25.0 and 66.6%, whereas that of all modalities was 100%. Conclusions MIONM is more effective and accurate than unimodal monitoring in assessing nerve root function during PE-TLIF surgeries, reducing both neurological complications and false-negative findings. We recommend MIONM in PE-TLIF surgeries.
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Affiliation(s)
- Yu Chen
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China
| | - Chunmei Luo
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China
| | - Juan Wang
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China
| | - Libangxi Liu
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China
| | - Bo Huang
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China
| | - Chang-Qing Li
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China
| | - Yue Zhou
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China
| | - Chencheng Feng
- Department of Orthopaedics, Xinqiao Hospital, The Army Medical University, Chongqing, 400037, China.
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22
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Jamaludin MR, Lai KW, Chuah JH, Zaki MA, Hum YC, Tee YK, Mohd Salim MI, Saw LB. Transcranial Electrical Motor Evoked Potential in Predicting Positive Functional Outcome of Patients after Decompressive Spine Surgery: Review on Challenges and Recommendations towards Objective Interpretation. Behav Neurol 2021; 2021:2684855. [PMID: 34777631 PMCID: PMC8580690 DOI: 10.1155/2021/2684855] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/18/2021] [Indexed: 11/18/2022] Open
Abstract
Spine surgeries impose risk to the spine's surrounding anatomical and physiological structures especially the spinal cord and the nerve roots. Intraoperative neuromonitoring (IONM) is a technology developed to monitor the integrity of the spinal cord and the nerve roots via the surgery. Transcranial motor evoked potential (TcMEP) (one of the IONM modalities) is adopted to monitor the integrity of the motor pathway of the spinal cord and the motor nerve roots. Recent research suggested that the IONM is conducive as a prognostic tool towards the patient's functional outcome. This paper summarizes the researches of IONM being adopted as a prognostic tool. In addition, this paper highlights the problems associated with the signal parameters as the improvement criteria in the previous researches. Lastly, we review the challenges of TcMEP to achieve a prognostic tool focusing on the factors that could interfere with the generation of a stable TcMEP response. The final section will discuss recommendations for IONM technology to achieve an objective prognostic tool.
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Affiliation(s)
- Mohd Redzuan Jamaludin
- Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Khin Wee Lai
- Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Joon Huang Chuah
- Department of Electrical Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Muhammad Afiq Zaki
- Center of Environmental Health and Safety, Faculty of Health Sciences, Universiti Teknologi Mara Selangor, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia
| | - Yan Chai Hum
- Centre for Healthcare Science & Technology, Department of Mechatronics and Biomedical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Malaysia
| | - Yee Kai Tee
- Centre for Healthcare Science & Technology, Department of Mechatronics and Biomedical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Malaysia
| | - Maheza Irna Mohd Salim
- Bioinspired Device and Tissue Engineering Research Group, School of Biomedical Engineering and Health Sciences, Faculty of Engineering, Universiti Teknologi Malaysia, 81300 Skudai, Johor, Malaysia
| | - Lim Beng Saw
- Department of Orthopaedic Surgery, Sunway Medical Centre, Malaysia
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23
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Wilent WB, Tesdahl EA, Trott JT, Tassone S, Harrop JS, Klineberg EO, Sestokas AK. Impact of inhalational anesthetic agents on the baseline monitorability of motor evoked potentials during spine surgery: a review of 22,755 cervical and lumbar procedures. Spine J 2021; 21:1839-1846. [PMID: 34274500 DOI: 10.1016/j.spinee.2021.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 06/01/2021] [Accepted: 07/02/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT During spine surgery, motor evoked potentials (MEPs) are often utilized to monitor both spinal cord function and spinal nerve root or plexus function. While there are reports evaluating the impact of anesthesia on the ability of MEPs to monitor spinal cord function, less is known about the impact of anesthesia on the ability of MEPs to monitor spinal nerve root and plexus function. PURPOSE To compare the baseline monitorability and amplitude of MEPs during cervical and lumbar procedures between two cohorts based on the maintenance anesthetic regimen: a total intravenous anesthesia (TIVA) versus a regimen balanced with volatile inhalational and intravenous agents. STUDY DESIGN Baseline MEP data from a total of 16,559 cervical and 6,196 lumbar extradural spine procedures utilizing multimodality intraoperative neuromonitoring (IONM) including MEPs between January 2017 and March 2020 were obtained from a multi-institutional database. Two cohorts for each region of spine surgery were delineated based on the anesthetic regimen: a TIVA cohort and a Balanced anesthesia cohort. PATIENT SAMPLE Age 18 and older. Fellowship support for 65,000 for year 2021. OUTCOME MEASURES Percent monitorability and amplitudes of baseline MEPs. METHODS The baseline monitorability of each muscle MEP was evaluated by the IONM team in real-time and recorded in the patient's electronic medical record. The relation between anesthetic regimen and baseline monitorability was estimated using mixed effects logistic regression, with distinct models for cervical and lumbar procedures. Subsets of cervical and lumbar procedures from each anesthesia cohort in which all MEPs were deemed monitorable were randomly selected and the average peak-to-trough amplitude of each muscle MEP was retrospectively measured. Mixed-effects linear regression models were estimated (one each for cervical and lumbar procedures) to assess possible differences in average amplitude associated with anesthesia regimen. RESULTS At the time of surgery, baseline MEPs were reported monitorable from all targeted muscles in 86.8% and 83.0% of cervical and lumbar procedures, respectively, for the TIVA cohort, but were reported monitorable in just 59.3% and 61.0% of cervical and lumbar procedures, respectively, in the Balanced cohort, yielding disparities of 27.5% and 22.0%, respectively. The model-adjusted monitorability disparity between cohorts for a given muscle MEP ranged from 0.2% to 16.6% but was smallest for distal intrinsic hand and foot muscle MEPs (0.2%-1.1%) and was largest for proximal muscle MEPs (deltoid: 10.8%, biceps brachii: 8.8%, triceps: 13.0%, quadriceps: 16.6%, gastrocnemius: 7.8%, and tibialis anterior: 3.7%) where the monitorability was significantly decreased in the Balanced cohort relative to the TIVA cohort (p<.0001). Relative to the TIVA cohort, the model-adjusted amplitude of an MEP in the Balanced cohort was smaller for all muscles measured, ranging from 27.5% to 78.0% smaller. Relative to the TIVA cohort, the model-adjusted amplitude of an MEP was significantly decreased (p<.01) in the Balanced cohort for the most proximal muscles (Percent smaller: deltoid: 74.3%, biceps: 78.0%, triceps: 54.9%, quadriceps: 54.8%). CONCLUSIONS TIVA is the preferred anesthetic regimen for optimizing MEP monitoring during spine surgery. Inhalational agents significantly decrease MEP monitorability and amplitudes for most muscles, and this effect is especially pronounced for proximal limb muscles such as the deltoid, biceps, triceps, and quadriceps.
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Affiliation(s)
- W Bryan Wilent
- SpecialtyCare, 3 Maryland Farms, Suite 200, Brentwood, TN 37027.
| | - Eric A Tesdahl
- SpecialtyCare, 3 Maryland Farms, Suite 200, Brentwood, TN 37027
| | - Julie T Trott
- SpecialtyCare, 3 Maryland Farms, Suite 200, Brentwood, TN 37027
| | - Shakira Tassone
- SpecialtyCare, 3 Maryland Farms, Suite 200, Brentwood, TN 37027
| | - James S Harrop
- Jefferson University Hospital, 909 Walnut Street Clinical Office Building: 2nd Floor, Philadelphia, PA 19107
| | - Eric O Klineberg
- University of California Davis, 3301 C St., Suite 1500, Sacramento, CA 95816
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24
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Alluri R, Mok JK, Vaishnav A, Shelby T, Sivaganesan A, Hah R, Qureshi SA. Intraoperative Neuromonitoring During Lateral Lumbar Interbody Fusion. Neurospine 2021; 18:430-436. [PMID: 34610671 PMCID: PMC8497239 DOI: 10.14245/ns.2142440.220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/15/2021] [Indexed: 11/19/2022] Open
Abstract
Objective To review the evidence for the use of electromyography (EMG), motor-evoked potentials (MEPs), and somatosensory-evoked potentials (SSEPs) intraoperative neuromonitoring (IONM) strategies during lateral lumbar interbody fusion (LLIF), as well as discuss the limitations associated with each technique.
Methods A comprehensive review of the literature and compilation of findings relating to clinical studies investigating the efficacy of EMG, MEP, SSEP, or combined IONM strategies during LLIF.
Results The evidence for the use of EMG is mixed with some studies demonstrating the efficacy of EMG in preventing postoperative neurologic injuries and other studies demonstrating a high rate of postoperative neurologic deficits with EMG monitoring. Multimodal IONM strategies utilizing MEPs or saphenous SSEPs to monitor the lumbar plexus may be promising strategies based on results from a limited number of studies.
Conclusion The use of traditional EMG during LLIF remains without consensus. There is a growing body of evidence utilizing multimodal IONM with MEPs or saphenous SSEPs demonstrating a possible decrease in postoperative neurologic injuries after LLIF. Future prospective studies, with clear definitions of neurologic injury, that evaluate different multimodal IONM strategies are needed to better assess the efficacy of IONM during LLIF.
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Affiliation(s)
- Ram Alluri
- Hospital for Special Surgery, New York, NY, USA
| | | | | | - Tara Shelby
- Department of Orthopaedic Surgery, Keck Medical Center of University of Southern California, Los Angeles, CA, USA
| | | | - Raymond Hah
- Department of Orthopaedic Surgery, Keck Medical Center of University of Southern California, Los Angeles, CA, USA
| | - Sheeraz A Qureshi
- Hospital for Special Surgery, New York, NY, USA.,Weill Cornell Medical College, New York, NY, USA
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25
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Patel MS, Wilent WB, Gutman MJ, Abboud JA. Incidence of peripheral nerve injury in revision total shoulder arthroplasty: an intraoperative nerve monitoring study. J Shoulder Elbow Surg 2021; 30:1603-1612. [PMID: 33096272 DOI: 10.1016/j.jse.2020.09.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/18/2020] [Accepted: 09/21/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND The incidence of nerve injuries in revision total shoulder arthroplasty (TSA) is not well defined in the literature and may be higher than that in primary procedures, with 1 study reporting a complication rate of 50% for shoulder revisions. Given that continuous intraoperative nerve monitoring (IONM) can be an effective tool in diagnosing evolving neurologic dysfunction and preventing postoperative injuries, the purpose of this study was to report on IONM data and nerve injury rates in a series of revision TSAs. METHODS A retrospective cohort review of consecutive patients who underwent revision TSA was performed from January 2016 to March 2020. Indications for revision included infection (n = 7); failed total arthroplasty and hemiarthroplasty secondary to pain, dysfunction, and/or loose components (n = 36); and periprosthetic fracture (n = 1). Of the shoulders, 32 underwent revision to a reverse TSA, 6 underwent revision to an anatomic TSA, and 6 underwent spacer placement. IONM data included transcranial electrical motor evoked potentials (MEPs), somatosensory evoked potentials, and free-run electromyography. The motor alert threshold was set at ≥80% signal attenuation in any peripheral nerve. Patients were screened for neurologic deficits immediately following surgery, prior to administration of an interscalene nerve block, and during the first 2 postoperative visits. Additional data collection included surgical indication, sex, laterality, age at surgery, procedure performed, body mass index, history of tobacco use, Charlson Comorbidity Index, medical history, and preoperative range of motion. RESULTS A total of 44 shoulders in 38 patients were included, with a mean age of 63.2 years (standard deviation, 13.0 years). Of the procedures, 22.4% (n = 10) had an MEP alert, with 8 isolated to a single nerve (7 axillary and 1 radial) and 1 isolated to the axillary and musculocutaneous nerves. Only 1 patient experienced a major brachial plexus alert involving axillary, musculocutaneous, radial, ulnar, and median nerve MEP alerts, as well as ulnar and median nerve somatosensory evoked potential alerts. Age, sex, body mass index, Charlson Comorbidity Index, and preoperative range of motion were not found to be significantly different between cases in which an MEP alert occurred and cases with no MEP alerts. In the postoperative period, no minor or major nerve injuries were found whereas distal peripheral neuropathy developed in 4 patients (9.1%). CONCLUSION Among 44 surgical procedures, no patients (0%) had a major or minor nerve injury postoperatively and 4 patients (9.1%) complained of distal peripheral neuropathy postoperatively. In this study, we have shown that through the use of IONM, the rate of minor and major nerve injuries can be minimized in revision shoulder arthroplasty.
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Affiliation(s)
- Manan S Patel
- Department of Shoulder and Elbow Surgery, Rothman Orthopaedic Institute, Philadelphia, PA, USA.
| | | | - Michael J Gutman
- Department of Shoulder and Elbow Surgery, Rothman Orthopaedic Institute, Philadelphia, PA, USA
| | - Joseph A Abboud
- Department of Shoulder and Elbow Surgery, Rothman Orthopaedic Institute, Philadelphia, PA, USA
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26
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Hofler RC, Fessler RG. Intraoperative Neuromonitoring and Lumbar Spinal Instrumentation: Indications and Utility. Neurodiagn J 2021; 61:2-10. [PMID: 33945449 DOI: 10.1080/21646821.2021.1874207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Multimodal intraoperative neurophysiologic monitoring (IONM) can be utilized as an adjunct to lumbar spinal instrumentation in order to aid with avoidance of neurologic complications. The most commonly utilized modalities include somatosensory-evoked potentials, motor-evoked potentials, and electromyography. Somatosensory-evoked potentials (SSEPs) allow for continuous assessment of the dorsal columns of the spinal cord and are therefore most useful during procedures with a posterior approach to the cervical and thoracic spine. Motor-evoked potentials (MEPs) and electromyography (EMG) can be applied intermittently to assess motor nerve function. The utility of each individual modality can be largely dependent on the surgical approach. Approaches to lumbar spinal instrumentation can be generally categorized as anterior, lateral, and posterior. For lateral approaches, electromyography can be helpful in identifying neural structures crossing the surgical field to prevent injury. In posterior and anterior approaches, somatosensory-evoked potentials and motor-evoked potentials can be used to assess nerve injury during and after maneuvers for decompression and instrumentation. Additionally, during the placement of pedicle screws, direct stimulation with triggered electromyography can be used to detect the pedicle cortex's breach. The efficacy of intraoperative neuromonitoring is dependent on prompt and accurate recognition of changes in signals. This is then followed by accurate recognition of the cause for these changes and appropriate responses by the surgeon, anesthesiologist, and monitoring personnel to correct the change.
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Affiliation(s)
- Ryan C Hofler
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois
| | - Richard G Fessler
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois
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27
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Wilent WB, Trott JM, Sestokas AK. Roadmap for Motor Evoked Potential (MEP) Monitoring for Patients Undergoing Lumbar and Lumbosacral Spinal Fusion Procedures. Neurodiagn J 2021; 61:27-36. [PMID: 33945448 DOI: 10.1080/21646821.2021.1866934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
MEPs are recommended for patients undergoing lumbar and lumbosacral procedures in which intraoperative neuromonitoring (IONM) is being utilized. While electromyography (EMG) provides critical nerve root proximity information, spontaneous EMG discharges are relatively poor at reliably diagnosing spinal nerve root dysfunction. In contrast, research indicates that MEPs are both sensitive and specific in diagnosing evolving spinal nerve root dysfunction. There is conflicting evidence, however, and it must be emphasized that the value of adding MEPs is only realized when practices and techniques are optimized. The ideal anesthetic plan is an optimized total intravenous anesthetic (TIVA) regimen. Selection of appropriate anesthetics and dosing is important for optimizing baseline response amplitudes and promoting diagnostic confidence in analyzing signal changes. An adaptive set of alert criteria that account for baseline amplitude and morphology fluctuations should guide the determination of significant signal change. The therapeutic impact of accurate diagnostic information depends on the timeliness of diagnosis and intervention. Prior to the start of surgery, a plan to obtain MEPs at least once every 10 minutes during the active part of the procedure and after every significant surgical maneuver should be agreed upon, and the intervention plan should include but not be limited to possible removal of hardware and release of retraction or distractive forces. In summary, MEPs can improve monitoring of at-risk nerve root function, but the accuracy and therapeutic impact of such monitoring depend on perioperative planning and communication that optimize use of this modality.
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Affiliation(s)
| | - Julie M Trott
- Medical Department, SpecialtyCare, Brentwood, Tennessee
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28
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Kim YH, Ha KY, Rhyu KW, Park HY, Cho CH, Kim HC, Lee HJ, Kim SI. Lumbar Interbody Fusion: Techniques, Pearls and Pitfalls. Asian Spine J 2020; 14:730-741. [PMID: 33108838 PMCID: PMC7595814 DOI: 10.31616/asj.2020.0485] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 12/11/2022] Open
Abstract
Lumbar interbody fusion (LIF) is an effective and popular surgical procedure for the management of various spinal pathologies, especially degenerative diseases. Currently, LIF can be performed with posterior, transforaminal, anterior, and lateral approaches by open surgery or minimally invasive surgery (MIS). Each technique has its own advantages and disadvantages. In general, posterior LIF is a well-established procedure with good fusion rates and low complication rates but is limited by the possibility of iatrogenic injury to the neural structures and paraspinal muscles. Transforaminal LIF is frequently performed using an MIS technique and has an advantage of reducing these iatrogenic injuries. Anterior LIF (ALIF) can restore the disk height and sagittal alignment but has inherent approach-related challenges such as visceral and vascular complications. Lateral LIF and oblique LIF are performed using an MIS technique and have shown postoperative outcomes similar to ALIF; however, these approaches carry a risk of injury to psoas, lumbar plexus, and vascular structures. Herein, we provide a detailed description of the surgical procedures of each LIF technique. We shall then consider the pearls and pitfalls, as well as propose surgical indications and contraindications based on the available evidence in the literatures.
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Affiliation(s)
- Young-Hoon Kim
- Department of Orthopedic Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kee-Yong Ha
- Department of Orthopedic Surgery, Kyung Hee University Hospital at Gangdong, Seoul, Korea
| | - Kee-Won Rhyu
- Department of Orthopedic Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
| | - Hyung-Youl Park
- Department of Orthopedic Surgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Chang-Hee Cho
- Department of Orthopedic Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hun-Chul Kim
- Department of Orthopedic Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyo-Jin Lee
- Department of Orthopedic Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sang-Il Kim
- Department of Orthopedic Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Buhl LK, Bastos AB, Pollard RJ, Arle JE, Thomas GP, Song Y, Boone MD. Neurophysiologic Intraoperative Monitoring for Spine Surgery: A Practical Guide From Past to Present. J Intensive Care Med 2020; 36:1237-1249. [PMID: 32985340 DOI: 10.1177/0885066620962453] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Intraoperative neuromonitoring was introduced in the second half of the 20th century with the goal of preventing patient morbidity for patients undergoing complex operations of the central and peripheral nervous system. Since its early use for scoliosis surgery, the growth and utilization of IOM techniques expanded dramatically over the past 50 years to include spinal tumor resection and evaluation of cerebral ischemia. The importance of IOM has been broadly acknowledged, and in 1989, the American Academy of Neurology (AAN) released a statement that the use of SSEPs should be standard-of-care during spine surgery. In 2012, both the AAN and the American Clinical Neurophysiology Society (ACNS) recommended that: "Intraoperative monitoring (IOM) using SSEPs and transcranial MEPs be established as an effective means of predicting an increased risk of adverse outcomes, such as paraparesis, paraplegia, and quadriplegia, in spinal surgery." With a multimodal approach that combines SSEPs, MEPs, and sEMG with tEMG and D waves, as appropriate, sensitivity and specificity can be maximized for the diagnosis of reversible insults to the spinal cord, nerve roots, and peripheral nerves. As with most patient safety efforts in the operating room, IOM requires contributions from and communication between a number of different teams. This comprehensive review of neuromonitoring techniques for surgery on the central and peripheral nervous system will highlight the technical, surgical and anesthesia factors required to optimize outcomes. In addition, this review will discuss important trouble shooting measures to be considered when managing ION changes concerning for potential injury.
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Affiliation(s)
- Lauren K Buhl
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA.,Department of Neurosurgery, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Andres Brenes Bastos
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Richard J Pollard
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Jeffrey E Arle
- Department of Neurology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - George P Thomas
- Department of Neurology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Yinchen Song
- Department of Neurology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - M Dustin Boone
- Department of Neurology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA.,Department of Anesthesia, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
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Feasibility of Using Intraoperative Neuromonitoring in the Prophylaxis of Dysesthesia in Transforaminal Endoscopic Discectomies of the Lumbar Spine. Brain Sci 2020; 10:brainsci10080522. [PMID: 32764525 PMCID: PMC7465602 DOI: 10.3390/brainsci10080522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 07/30/2020] [Accepted: 08/03/2020] [Indexed: 12/20/2022] Open
Abstract
(1) Background: Postoperative nerve root injury with dysesthesia is the most frequent sequela following lumbar endoscopic transforaminal discectomy. At times, it may be accompanied by transient and rarely by permanent motor weakness. The authors hypothesized that direct compression of the exiting nerve root and its dorsal root ganglion (DRG) by manipulating the working cannula or endoscopic instruments may play a role. (2) Objective: To assess whether intraoperative neurophysiological monitoring can help prevent nerve root injury by identifying neurophysiological events during the initial placement of the endoscopic working cannula and the directly visualized video endoscopic procedure. (3) Methods: The authors performed a retrospective chart review of 65 (35 female and 30 male) patients who underwent transforaminal endoscopic decompression for failed non-operative treatment of lumbar disc herniation from 2012 to 2020. The patients’ age ranged from 22 to 86 years, with an average of 51.75 years. Patients in the experimental group (32 patients) had intraoperative neurophysiological monitoring recordings using sensory evoked (SSEP), and transcranial motor evoked potentials (TCEP), those in the control group (32 patients) did not. The SSEP and TCMEP data were analyzed and correlated to the postoperative course, including dysesthesia and clinical outcomes using modified Macnab criteria, Oswestry disability index (ODI), visual analog scale (VAS) for leg and back pain. (4) Results: The surgical levels were L4/L5 in 44.6%, L5/S1 in 23.1%, and L3/L4 in 9.2%. Of the 65 patients, 56.9% (37/65) had surgery on the left, 36.9% (24/65) on the right, and the remaining 6.2% (4/65) underwent bilateral decompression. Postoperative dysesthesia occurred in 2 patients in the experimental and six patients in the control group. In the experimental neuromonitoring group, there was electrodiagnostic evidence of compression of the exiting nerve root’s DRG in 24 (72.7%) of the 32 patients after initial transforaminal placement of the working cannula. A 5% or more decrease and a 50% or more decrease in amplitude of SSEPs and TCEPs recordings of the exiting nerve root were resolved by repositioning the working cannula or by pausing the root manipulation until recovery to baseline, which typically occurred within an average of 1.15 min. In 15 of the 24 patients with such latency and amplitude changes, a foraminoplasty was performed before advancing the endoscopic working cannula via the transforaminal approach into the neuroforamen to avoid an impeding nerve root injury and postoperative dysesthesia. (5) Conclusion: Neuromonitoring enabled the intraoperative diagnosis of DRG compression during the initial transforaminal placement of the endoscopic working cannula. Future studies with more statistical power will have to investigate whether employing neuromonitoring to avoid intraoperative compression of the exiting nerve root is predictive of lower postoperative dysesthesia rates in patients undergoing videoendoscopic transforaminal discectomy.
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31
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Laughlin RS, Johnson RL, Burkle CM, Staff NP. Postsurgical Neuropathy: A Descriptive Review. Mayo Clin Proc 2020; 95:355-369. [PMID: 32029088 DOI: 10.1016/j.mayocp.2019.05.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 04/27/2019] [Accepted: 05/21/2019] [Indexed: 11/21/2022]
Abstract
Postsurgical neuropathies represent an infrequent but potentially devastating complication of surgery that may result in significant morbidity with medicolegal implications. Elucidation of this phenomenon has evolved over the past few decades, with emerging evidence for not only iatrogenic factors contributing to this process but also inflammatory causes. This distinction can be important; for instance, cases in which inflammatory etiologies are suspected may benefit from further investigations including nerve biopsy and may benefit from treatment in the form of immunotherapy. In contrast, postsurgical neuropathies due to perioperative causes including anesthesia, traction, compression, and transection will not benefit in the same manner. This article summarizes early and current literature surrounding the frequency of new neurologic deficits after various surgical types, potential causes including anatomical and inflammatory considerations, and roles for treatment. To capture the scope of the issue, a literature review was conducted for human studies in English via MEDLINE and EMBASE from January 1, 1988 to March 31, 2018. Search terms included anesthesia and/or surgical procedures, operative, peripheral nervous system diseases, trauma, mononeuropathy, polyneuropathy, peripheral nervous system, nerve compression, neuropathy, plexopathy, postoperative, postsurgical, perioperative, complication. We excluded case series with less than 10 patients and review papers. We then narrowed the studies to those presented highlighting key concepts in postsurgical neuropathy.
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Epstein NE. Many Intraoperative Monitoring Modalities Have Been Developed To Limit Injury During Extreme Lateral Interbody Fusion (XLIF/MIS XLIF): Does That Mean XLIF/MIS XLIF Are Unsafe? Surg Neurol Int 2019; 10:233. [PMID: 31893134 PMCID: PMC6911673 DOI: 10.25259/sni_563_2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 11/19/2019] [Indexed: 11/26/2022] Open
Abstract
Background: Extreme lateral interbody fusions (XLIF) and Minimally Invasive (MIS) XLIF pose significant risks of neural injury to the; lumbar plexus, ilioinguinal, iliohypogastric, genitofemoral, lateral femoral cutaneous, and subcostal nerves. To limit these injuries, many intraoperative neural monitoring (IONM) modalities have been proposed. Methods: Multiple studies document various frequencies of neural injuries occurring during MIS XLIF/XLIF: plexus injuries (13.28%); sensory deficits (0-75%; permanent 62.5%); motor deficits (0.7-33.6%; most typically iliopsoas weakness (14.3%-31%)), and anterior thigh/groin pain (12.5-25%.-34%). To avoid/limit these injuries, multiple IONM techniques have been proposed. These include; using finger electrodes during operative dissection, employing motor evoked potentials (MEP), eliminating (no) muscle relaxants (NMR), and using “triggered” EMGs. Results: In one study, finger electrodes for XLIF at L4-L5 level for degenerative spondylolisthesis reduced transient postoperative neurological symptoms from 7 [38%] of 18 cases (e.g. without IONM) to 5 [14%] of 36 cases (with IONM). Two series showed that motor evoked potential monitoring (MEP) for XLIF reduced postoperative motor deficits; they, therefore, recommended their routine use for XLIF. Another study demonstrated that eliminating muscle relaxants during XLIF markedly reduced postoperative neurological deficits/thigh pain by allowing for better continuous EMG monitoring (e.g. NMR no muscle relaxants). Finally, a “triggered” EMG study” reduced postoperative motor neuropraxia, largely by limiting retraction time. Conclusion: Multiple studies have offered different IONM techniques to avert neurological injuries following MIS XLIF/XLIF. Does this mean that these procedures (e.g. XLIF/MIS XLIF) are unsafe?
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Affiliation(s)
- Nancy E Epstein
- Professor of Clinical Neurosurgery, School of Medicine, State University of New York at Stony Brook, New York, and Chief of Neurosurgical Spine and Education, NYU Winthrop Hospital, NYU Winthrop NeuroScience/Neurosurgery, Mineola, New York 11501, United States
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Hah R, Kang HP. Lateral and Oblique Lumbar Interbody Fusion-Current Concepts and a Review of Recent Literature. Curr Rev Musculoskelet Med 2019; 12:305-310. [PMID: 31230190 PMCID: PMC6684701 DOI: 10.1007/s12178-019-09562-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
PURPOSE To review the relevant recent literature regarding minimally invasive, lateral, and oblique approaches to the anterior lumbar spine, with a particular focus on the operative and postoperative complications. METHODS A literature search was performed on Pubmed and Web of Science using combinations of the following keywords and their acronyms: lateral lumbar interbody fusion (LLIF), oblique lateral interbody fusion (OLIF), anterior-to-psoas approach (ATP), direct lateral interbody fusion (DLIF), extreme lateral interbody fusion (XLIF), and minimally invasive surgery (MIS). All results from January 2016 through January 2019 were evaluated and all studies evaluating complications and/or outcomes were included in the review. RECENT FINDINGS Transient neurological deficit, particularly sensorimotor symptoms of the ipsilateral thigh, remains the most common complication seen in LLIF. Best available current literature demonstrates that approximately 30-40% of patients have postoperative deficits, primarily of the proximal leg. Permanent symptoms are less common, affecting 4-5% of cases. Newer techniques to reduce this rate include different retractors, direct visualization of the nerves, and intraoperative neuromonitoring. OLIF may have lower deficit rates, but the available literature is limited. Subsidence rates in both LLIF and OLIF are comparable to ALIF (anterior lumbar interbody fusion), but further study is required. Supplemental posterior fixation is an active area of investigation that shows favorable biomechanical results, but additional clinical studies are needed. Minimally invasive lumbar interbody fusion techniques continue to advance rapidly. As these techniques continue to mature, evidence-based risk-stratification systems are required to better guide both the patient and clinician in the joint decision-making process for the optimal surgical approach.
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Affiliation(s)
- Raymond Hah
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1450 San Pablo Street, Suite 5400, Los Angeles, CA 90033 USA
| | - H. Paco Kang
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1450 San Pablo Street, Suite 5400, Los Angeles, CA 90033 USA
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Vaishnav AS, Othman YA, Virk SS, Gang CH, Qureshi SA. Current state of minimally invasive spine surgery. JOURNAL OF SPINE SURGERY 2019; 5:S2-S10. [PMID: 31380487 DOI: 10.21037/jss.2019.05.02] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Over the past two decades, minimally invasive surgical approaches have become increasingly feasible, efficient and popular for the management of a wide range of spinal disorders, with a growing body of research demonstrating numerous advantages of these techniques over the traditional open approach. In this article, we review the technologies and innovations that are expanding the horizon of minimally invasive spine surgery (MISS), and highlight high-quality peer-reviewed literature in the past year that expands our knowledge and understanding of indications, advantages and limitations of MISS.
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Affiliation(s)
| | - Yahya A Othman
- Hospital for Special Surgery, New York, NY, USA.,Weill Cornell Medicine-Qatar, Doha, Qatar
| | | | | | - Sheeraz A Qureshi
- Hospital for Special Surgery, New York, NY, USA.,Weill Cornell Medical College, New York, NY, USA
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