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Bothe C, Winterling C, Berndt K, Ahmeti H, Balandin A, Steinfath M, Helmers AK, Fudickar A. Reduction of the acquisition time needed to obtain somatosensory evoked potentials by estimation of the required averaging sweep count by an algorithm. J Clin Monit Comput 2024:10.1007/s10877-024-01217-3. [PMID: 39261395 DOI: 10.1007/s10877-024-01217-3] [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: 06/21/2024] [Accepted: 08/31/2024] [Indexed: 09/13/2024]
Abstract
Somatosensory evoked potentials are frequently acquired by stimulation of the median or tibial nerves (mSEPs and tSEPs) for intraoperative monitoring of sensory pathways. Due to their low amplitudes it is common practice to average 200 or more sweeps to discern the evoked potentials from the background EEG. The aim of this study was to investigate if an algorithm designed to determine the lowest sweep count needed to obtain reproducible evoked potentials in each patient significantly reduces the median necessary sweep count to under 200. 30 patients undergoing spinal surgery at the Department of Neurosurgery were included in the study. Beginning with a sweep count of 200 an algorithm was designed to determine the lowest sweep count that yielded reproducible evoked potentials in each patient. By this algorithm the minimal sweep count was determined in 15 patients for mSEPs and in 15 patients for tSEPs. The required sweep count was below 200 in 14 of 15 patients for mSEPs (93.3%) with a mean sweep count of 56 ± 51. For tSEPs the sweep count was below 200 in 11 of 15 patients (73.3%) with a mean sweep count of 106 ± 70 (mean ± SD). The calculated mean time to average the potentials could thereby be reduced from 48.8s to 13.7s for mSEPs and from 48.8s to 25.9s for tSEPs. The proposed algorithm allowed sweep count and acquisition time reduction in roughly 90% of all patients for mSEPs and in 70% of all patients for tSEPs.
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Affiliation(s)
- Clemens Bothe
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany.
| | | | - Kai Berndt
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Hajrullah Ahmeti
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Alina Balandin
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Markus Steinfath
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | | | - Axel Fudickar
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
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Allison DW, Verma A, Holman PJ, Huang M, Trask TW, Barber SM, Cockrell AR, Weber MR, Brooks DW, Delgado L, Steele WJ, Sellin JN, Gressot LV, Lambert B, Ma BB, Faraji AH, Saifi C. Transabdominal motor evoked potential neuromonitoring of lumbosacral spine surgery. Spine J 2024; 24:1660-1670. [PMID: 38685276 DOI: 10.1016/j.spinee.2024.04.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/15/2024] [Accepted: 04/23/2024] [Indexed: 05/02/2024]
Abstract
BACKGROUND CONTEXT Transcranial Motor Evoked Potentials (TcMEPs) can improve intraoperative detection of femoral plexus and nerve root injury during lumbosacral spine surgery. However, even under ideal conditions, TcMEPs are not completely free of false-positive alerts due to the immobilizing effect of general anesthetics, especially in the proximal musculature. The application of transcutaneous stimulation to activate ventral nerve roots directly at the level of the conus medularis (bypassing the brain and spinal cord) has emerged as a method to potentially monitor the motor component of the femoral plexus and lumbosacral nerves free from the blunting effects of general anesthesia. PURPOSE To evaluate the reliability and efficacy of transabdominal motor evoked potentials (TaMEPs) compared to TcMEPs during lumbosacral spine procedures. DESIGN We present the findings of a single-center 12-month retrospective experience of all lumbosacral spine surgeries utilizing multimodality intraoperative neuromonitoring (IONM) consisting of TcMEPs, TaMEPs, somatosensory evoked potentials (SSEPs), electromyography (EMG), and electroencephalography. PATIENT SAMPLE Two hundred and twenty patients having one, or a combination of lumbosacral spine procedures, including anterior lumbar interbody fusion (ALIF), lateral lumbar interbody fusion (LLIF), posterior spinal fusion (PSF), and/or transforaminal lumbar interbody fusion (TLIF). OUTCOME MEASURES Intraoperative neuromonitoring data was correlated to immediate postoperative neurologic examinations and chart review. METHODS Baseline reliability, false positive rate, true positive rate, false negative rate, area under the curve at baseline and at alerts, and detection of preoperative deficits of TcMEPs and TaMEPs were compared and analyzed for statistical significance. The relationship between transcutaneous stimulation voltage level and patient BMI was also examined. RESULTS TaMEPs were significantly more reliable than TcMEPs in all muscles except abductor hallucis. Of the 27 false positive alerts, 24 were TcMEPs alone, and 3 were TaMEPs alone. Of the 19 true positives, none were detected by TcMEPs alone, 3 were detected by TaMEPs alone (TcMEPs were not present), and the remaining 16 true positives involved TaMEPs and TcMEPs. TaMEPs had a significantly larger area under the curve (AUC) at baseline than TcMEPs in all muscles except abductor hallucis. The percent decrease in TcMEP and TaMEP AUC during LLIF alerts was not significantly different. Both TcMEPs and TaMEPs reflected three preexisting motor deficits. Patient BMI and TaMEP stimulation intensity were found to be moderately positively correlated. CONCLUSIONS These findings demonstrate the high reliability and predictability of TaMEPs and the potential added value when TaMEPs are incorporated into multimodality IONM during lumbosacral spine surgery.
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Affiliation(s)
- David W Allison
- Department of Neurology, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA.
| | - Amit Verma
- Department of Neurology, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Paul J Holman
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Meng Huang
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Todd W Trask
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Sean M Barber
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Anthony R Cockrell
- Department of Neurology, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Matthew R Weber
- Department of Neurology, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Dalton W Brooks
- Department of Neurology, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Leo Delgado
- Department of Neurology, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - William J Steele
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Jonathan N Sellin
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Loyola V Gressot
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Bradley Lambert
- Department of Orthopedics, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Brandy B Ma
- Department of Neurology, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Amir H Faraji
- Department of Neurosurgery, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
| | - Comron Saifi
- Department of Orthopedics, Houston Methodist Health System, 6560 Fannin Street, Houston, TX 77030, USA
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Lv H, Zhang Z, Yang A, Zhou J, Guo Y, Luo F, Zhang Z, Zhang Z, Xu J. Delayed postoperative neurological deficits from scoliosis correction: a case series and systematic review on clinical characteristics, treatment, prognosis, and recovery. 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 2024; 33:2721-2733. [PMID: 38809439 DOI: 10.1007/s00586-024-08296-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 04/02/2024] [Accepted: 05/01/2024] [Indexed: 05/30/2024]
Abstract
OBJECTIVE This study was designed to investigate the clinical features, treatment modalities, and risk factors influencing neurological recovery in patients who underwent scoliosis correction with delayed postoperative neurological deficit (DPND). METHODS Three patients with DPND were identified from 2 central databases for descriptive analysis. Furthermore, all DPND cases were retrieved from the PubMed and Embase databases. Neurological function recovery was categorized into complete and incomplete recovery groups based on the American Spinal Injury Association (ASIA) impairment scale. RESULTS Two patients were classified as type 3, and one was classified as type 2 based on the MRI spinal cord classification. Intraoperative neurophysiological monitoring (IONM) was consistently negative throughout the corrective procedure, and intraoperative wake-up tests were normal. The average time to DPND development was 11.8 h (range, 4-18 h), and all three patients achieved complete recovery of neurological function after undergoing revision surgery. A total of 14 articles involving 31 patients were included in the literature review. The mean time to onset of DPND was found to be 25.2 h, and 85.3% (29/34) of patients experienced DPND within the first 48 h postoperatively, with the most common initial symptoms being decreased muscle strength and sensation (26 patients, 83.9%). Regarding neurological function recovery, 14 patients were able to reach ASIA grade E, while 14 patients were not able to reach ASIA grade E. Univariate analysis revealed that preoperative diagnosis (p = 0.004), operative duration (p = 0.017), intraoperative osteotomy method (p = 0.033), level of neurological deficit (p = 0.037) and deficit source (p = 0.0358) were significantly associated with neurological outcomes. Furthermore, multivariate regression analysis indicated a strong correlation between preoperative diagnosis (p = 0.003, OR, 68.633; 95% CI 4.299-1095.657) and neurological prognosis. CONCLUSION Our findings indicate that spinal cord ischemic injury was a significant factor for patients experiencing DPND and distraction after corrective surgery may be a predisposing factor for spinal cord ischemia. Additionally, it is important to consider the possibility of DPND when limb numbness and decreased muscle strength occur within 48 h after corrective scoliosis surgery. Moreover, emergency surgical intervention is highly recommended for DPND caused by mechanical compression factors with a promising prognosis for neurological function, emphasizing the importance of taking into account preoperative orthopedic diagnoses when evaluating the potential for neurological recovery.
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Affiliation(s)
- Hui Lv
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China
| | - ZhongRong Zhang
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China
| | - AiJun Yang
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China
| | - JianHong Zhou
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China
| | - Yuan Guo
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China
| | - Fei Luo
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China
| | - ZhengFeng Zhang
- Department of Orthopedics, Xinqiao Hospital, 183 Xinqiao Main Street, Shapingba District, Chongqing, 400037, China
| | - ZeHua Zhang
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China.
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China.
| | - JianZhong Xu
- Department of Orthopaedic, Southwest Hospital, The First Affiliated Hospital of Army Medical University, No. 30 Gaotanyan Zhengjie, Shapingba District, Chongqing, 400038, China.
- Department of Orthopaedic, Jiangbei Branch of Southwest Hospital, 958th, Hospital of the PLA Army, No. 29 Jianxin East Road, Jiangbei District, Chongqing, 400023, China.
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Mishra MK, Pandey N, Sharma HB, Prasad RS, Sahu A, Pradhan RS, Yadav V. Diagnostic Accuracy of Somatosensory Evoked Potential and Transcranial Motor Evoked Potential in Detection of Neurological Injury in Intradural Extramedullary Spinal Cord Tumor Surgeries: A Short-Term Follow-Up Prospective Interventional Study Experience from Tertiary Care Center of India. Asian J Neurosurg 2024; 19:210-220. [PMID: 38974440 PMCID: PMC11226304 DOI: 10.1055/s-0044-1787052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024] Open
Abstract
Objective Intraoperative neuromonitoring (IONM) is an acknowledged tool for real-time neuraxis assessment during surgery. Somatosensory evoked potential (SSEP) and transcranial motor evoked potential (MEP) are commonest deployed modalities of IONM. Role of SSEP and MEP in intradural extramedullary spinal cord tumor (IDEMSCT) surgery is not well established. The aim of this study was to evaluate sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of SSEP and transcranial MEP, in detection of intraoperative neurological injury in IDEMSCT patients as well as their postoperative limb-specific neurological improvement assessment at fixed intervals till 30 days. Materials and Methods Symptomatic patients with IDEMSCTs were selected according to the inclusion criteria of study protocol. On modified McCormick (mMC) scale, their sensory-motor deficit was assessed both preoperatively and postoperatively. Surgery was done under SSEP and MEP (transcranial) monitoring using appropriate anesthetic agents. Gross total/subtotal resection of tumor was achieved as per IONM warning alarms. Sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of SSEP and MEP were calculated considering postoperative neurological changes as "reference standard." Patients were followed up at postoperative day (POD) 0, 1, 7, and 30 for convalescence. Statistical Analysis With appropriate tests of significance, statistical analysis was carried out. Receiver-operating characteristic curve was used to find cutoff point of mMC for SSEP being recordable in patients with higher neurological deficit along with calculation of sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of SSEP and MEP for prediction of intraoperative neurological injury. Results Study included 32 patients. Baseline mean mMC value was 2.59. Under neuromonitoring, gross total resection of IDEMSCT was achieved in 87.5% patients. SSEP was recordable in subset of patients with mMC value less than or equal to 2 with diagnostic accuracy of 100%. MEP was recordable in all patients and it had 96.88% diagnostic accuracy. Statistically significant neurological improvement was noted at POD-7 and POD-30 follow-up. Conclusion SSEP and MEP individually carry high diagnostic accuracy in detection of intraoperative neurological injuries in patients undergoing IDEMSCT surgery. MEP continues to monitor the neuraxis, even in those subsets of patients where SSEP fails to record.
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Affiliation(s)
- Manish Kumar Mishra
- Department of Neurosurgery, Institute of Medical Sciences, Varanasi, Uttar Pradesh, India
| | - Nityanand Pandey
- Department of Neurosurgery, Institute of Medical Sciences, Varanasi, Uttar Pradesh, India
| | - Hanjabam Barun Sharma
- Department of Physiology, Institute of Medical Sciences, Varanasi, Uttar Pradesh, India
| | - Ravi Shankar Prasad
- Department of Neurosurgery, Institute of Medical Sciences, Varanasi, Uttar Pradesh, India
| | - Anurag Sahu
- Department of Neurosurgery, Institute of Medical Sciences, Varanasi, Uttar Pradesh, India
| | - Ravi Shekhar Pradhan
- Department of Neurosurgery, Institute of Medical Sciences, Varanasi, Uttar Pradesh, India
| | - Vikrant Yadav
- Department of Neurosurgery, Institute of Medical Sciences, Varanasi, Uttar Pradesh, India
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Funaba M, Kanchiku T, Yoshida G, Machino M, Ushirozako H, Kawabata S, Ando M, Yamada K, Iwasaki H, Shigematsu H, Fujiwara Y, Tadokoro N, Takahashi M, Taniguchi S, Wada K, Yamamoto N, Yasuda A, Morito S, Hashimoto J, Takatani T, Kobayashi K, Ando K, Kurosu K, Segi N, Nakashima H, Nakanishi K, Takeshita K, Matsuyama Y, Imagama S. Impact of Preoperative Motor Status for the Positive Predictive Value of Transcranial Motor-Evoked Potentials Alerts in Thoracic Spine Surgery: A Prospective Multicenter Study by the Monitoring Committee of the Japanese Society for Spine Surgery and Related Research. Global Spine J 2023:21925682231196454. [PMID: 37606063 DOI: 10.1177/21925682231196454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/23/2023] Open
Abstract
STUDY DESIGN Prospective multicenter study. OBJECTIVE To investigate the validity of transcranial motor-evoked potentials (Tc-MEP) in thoracic spine surgery and evaluate the impact of specific factors associated with positive predictive value (PPV). METHODS One thousand hundred and fifty-six cases of thoracic spine surgeries were examined by comparing patient backgrounds, disease type, preoperative motor status, and Tc-MEP alert timing. Tc-MEP alerts were defined as an amplitude decrease of more than 70% from the baseline waveform. Factors were compared according to preoperative motor status and the result of Tc-MEP alerts. Factors that showed significant differences were identified by univariate and multivariate analysis. RESULTS Overall sensitivity was 91.9% and specificity was 88.4%. The PPV was significantly higher in the preoperative motor deficits group than in the preoperative no-motor deficits group for both high-risk (60.3% vs 38.3%) and non-high-risk surgery groups (35.1% vs 12.8%). In multivariate logistic analysis, the significant factors associated with true positive were surgical maneuvers related to ossification of the posterior longitudinal ligament (odds ratio = 11.88; 95% CI: 3.17-44.55), resection of intradural intramedullary spinal cord tumor (odds ratio = 8.83; 95% CI: 2.89-27), preoperative motor deficit (odds ratio = 3.46; 95% CI: 1.64-7.3) and resection of intradural extramedullary spinal cord tumor (odds ratio = 3.0; 95% CI: 1.16-7.8). The significant factor associated with false positive was non-attributable alerts (odds ratio = .28; 95% CI: .09-.85). CONCLUSION Surgeons are strongly encouraged to use Tc-MEP in patients with preoperative motor deficits, regardless of whether they are undergoing high-risk spine surgery or not. Knowledge of PPV characteristics will greatly assist in effective Tc-MEP enforcement and minimize neurological complications with appropriate interventions.
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Affiliation(s)
- Masahiro Funaba
- Department of Orthopedic Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Tsukasa Kanchiku
- Department of Orthopedic Surgery, Yamaguchi Rosai Hospital, Yamaguchi, Japan
| | - Go Yoshida
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Masaaki Machino
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroki Ushirozako
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Shigenori Kawabata
- Department of Orthopedic Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Muneharu Ando
- Department of Orthopedic Surgery, Kansai Medical University, Osaka, Japan
| | - Kei Yamada
- Department of Orthopedic Surgery, Kurume University School of Medicine, Kurume, Japan
| | - Hiroshi Iwasaki
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hideki Shigematsu
- Department of Orthopedic Surgery, Nara Medical University, Nara, Japan
| | - Yasushi Fujiwara
- Department of Orthopedic Surgery, Hiroshima City Asa Citizens Hospital, Hiroshima, Japan
| | - Nobuaki Tadokoro
- Department of Orthopedic Surgery, Kochi University, Kochi, Japan
| | | | | | - Kanichiro Wada
- Department of Orthopedic Surgery, Hirosaki University, Hirosaki, Japan
| | - Naoya Yamamoto
- Department of Orthopedic Surgery, Adachi Medical Center, Tokyo Women's Medical University, Tokyo, Japan
| | - Akimasa Yasuda
- Department of Orthopedic Surgery, National Defense Medical College, Tokorozawa, Japan
| | - Shinji Morito
- Department of Orthopedic Surgery, Kurume University School of Medicine, Kurume, Japan
| | - Jun Hashimoto
- Department of Orthopedic Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tsunenori Takatani
- Division of Central Clinical Laboratory, Nara Medical University, Nara, Japan
| | - Kazuyoshi Kobayashi
- Department of Orthopedic Surgery, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Kei Ando
- Department of Orthopedic Surgery, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Kenta Kurosu
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naoki Segi
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroaki Nakashima
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | | | - Katsushi Takeshita
- Department of Orthopedic Surgery, Jichi Medical University, Tochigi, Japan
| | - Yukihiro Matsuyama
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Shiro Imagama
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Fournier S, Clark JP, Lieberman JA. Letter to the Editor. Incorrect analysis of motor evoked potential efficacy for pedicle subtraction osteotomy. J Neurosurg Spine 2020; 32:779-780. [PMID: 31923891 DOI: 10.3171/2019.8.spine19909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Panagopoulos D, Antoniades E, Karydakis P, Giakoumettis D, Themistocleous M. Postoperative Tetraplegia to a Child after Cerebellar Pilocytic Astrocytoma Excision at Prone Position: Case Report and Literature Review. AMERICAN JOURNAL OF CASE REPORTS 2020; 21:e920213. [PMID: 32161253 PMCID: PMC7081953 DOI: 10.12659/ajcr.920213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Various factors have been implicated in the pathogenesis of infarction after posterior fossa surgery such as venous air embolism, patient's position (seated or prone), hyperflexion of the neck, excessive spinal cord traction, cervical canal stenosis, and systemic arterial hypotension. The main aim of this case report was to elucidate a case in which hydrogen peroxide was implicated in a major and systemic complication after a neurosurgical procedure. CASE REPORT We describe the case of a 5-year-old female patient who was admitted to our hospital because of a cerebellar hemispheric astrocytoma associated with obstructive hydrocephalus and accompanied by 2 syringomyelic cavities in the cervicothoracic portion of the spinal cord. Immediately after gross total resection of the lesion, impaired mobility of the upper and lower extremities was observed, a finding that was not consistent with intraoperative neurophysiologic monitoring data. Hydrogen peroxide had been judiciously used to irrigate the resection tumor cavity. In the next few postoperative days, the patient suffered from transient diabetes insipidus and hyperpyrexia, indicative of hypothalamic injury. CONCLUSIONS Neurological evaluation of the patient, after stabilization of her medical condition, revealed residual spasticity of upper and lower extremities, rendering her able to mobilize via the aid of wheelchair only. The most possible pathophysiologic explanation of her neurological deterioration, including hypothalamic dysfunction, was analyzed. The role of hydrogen peroxide as a source of free radical formation, and its co-responsibility for vascular platelet aggregation and vasoconstriction was considered, upon case review, the main responsible etiologic factor.
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Affiliation(s)
| | - Elias Antoniades
- Department of Neurosurgery, Agia Sophia, Pediatric Hospital, Athens, Greece
| | | | - Dimitrios Giakoumettis
- Department of Neurosurgery, University of Athens, Medical School, Evangelismos Hospital, Athens, Greece
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Raffa G, Scibilia A, Conti A, Cardali SM, Rizzo V, Terranova C, Quattropani MC, Marzano G, Ricciardo G, Vinci SL, Germanò A. Multimodal Surgical Treatment of High-Grade Gliomas in the Motor Area: The Impact of the Combination of Navigated Transcranial Magnetic Stimulation and Fluorescein-Guided Resection. World Neurosurg 2019; 128:e378-e390. [PMID: 31029822 DOI: 10.1016/j.wneu.2019.04.158] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 11/16/2022]
Abstract
BACKGROUND Fluorescein-guided surgery of high-grade gliomas (HGGs) increases the extent of tumor resection but its efficacy has been questioned, especially for tumors located close to functional networks. In these cases, navigated transcranial magnetic stimulation (nTMS) may be used to plan and guide a safe resection. The aim of this study was to assess the impact of these techniques combined with intraoperative neurophysiologic mapping (IONM) to achieve the maximal safe resection of tumors located in the motor area. METHODS We collected data of patients operated using a multimodal combination of sodium fluorescein-guided resection, nTMS motor planning, and IONM for HGGs in the motor area. The nTMS planning accuracy, extent of resection, and postoperative motor and functional status were compared with a matched control group of patients with HGG operated on only by IONM-guided resection. RESULTS Forty-one patients treated by multimodal approach (group A) and 41 controls (group B) were included. The nTMS-based planning reliably identified the tumor/motor pathway spatial relationship (accuracy, 92.68%). We obtained in group A versus controls a higher gross total resection rate (73.17% vs. 51.22%; P = 0.04), and a reduction of cases with new permanent motor deficits (9.75% vs. 29.27%; P = 0.04) or Karnofsky Performance Status worsening (12.19% vs. 31.71%; P = 0.03). CONCLUSIONS This study supports the role of the combination of sodium fluorescein-guided resection and nTMS-based planning for surgery of HGGs close to the motor pathway. This multimodal approach in combination with IONM may lead to customized preoperative planning, increased extent of resection, and improved functional outcome, compared with standard IONM-guided surgery.
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Affiliation(s)
- Giovanni Raffa
- Division of Neurosurgery, BIOMORF Department, University of Messina, Messina, Italy.
| | - Antonino Scibilia
- Division of Neurosurgery, BIOMORF Department, University of Messina, Messina, Italy; Division of Neurosurgery, University of Strasbourg, Strasbourg, France
| | - Alfredo Conti
- Division of Neurosurgery, BIOMORF Department, University of Messina, Messina, Italy
| | | | - Vincenzo Rizzo
- Division of Neurology, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Carmen Terranova
- Division of Neurology, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | | | - Giuseppina Marzano
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Giuseppe Ricciardo
- Division of Neurosurgery, BIOMORF Department, University of Messina, Messina, Italy
| | - Sergio Lucio Vinci
- Division of Neuroradiology, BIOMORF Department, University of Messina, Messina, Italy
| | - Antonino Germanò
- Division of Neurosurgery, BIOMORF Department, University of Messina, Messina, Italy
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9
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Yahara Y, Seki S, Makino H, Watanabe K, Uehara M, Takahashi J, Kimura T. Three-Dimensional Computed Tomography Analysis of Spinal Canal Length Increase After Surgery for Adolescent Idiopathic Scoliosis: A Multicenter Study. J Bone Joint Surg Am 2019; 101:48-55. [PMID: 30601415 PMCID: PMC6319593 DOI: 10.2106/jbjs.18.00531] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The most severe complication after surgery for adolescent idiopathic scoliosis is spinal cord injury. There is a relationship between corrective surgery and subsequent elongation of the spinal canal. We sought to investigate which factors are involved in this phenomenon. METHODS Seventy-seven patients with adolescent idiopathic scoliosis (49 with Lenke type 1 and 28 with type 2) who underwent spinal correction surgery were included. The mean patient age at surgery was 14.2 years (range, 11 to 20 years). The spines of all patients were fused within the range of T2 to L2, and computed tomography (CT) data were retrospectively collected. We measured the preoperative and postoperative lengths of the spinal canal from T2 to L2 using 3-dimensional (3D) CT-based imaging software. We also examined the association between the change in T2-L2 spinal canal length and the radiographic parameters. RESULTS The length of the spinal canal from T2 to L2 was increased by a mean of 8.5 mm in the patients with Lenke type 1, 12.7 mm in those with type 2, and 10.1 mm overall. Elongation was positively associated with the preoperative main thoracic Cobb angle in both the type-1 group (R = 0.43, p < 0.005) and the type-2 group (R = 0.77, p < 0.000001). The greatest elongation was observed in the periapical vertebral levels of the main thoracic curves. CONCLUSIONS Corrective surgery for adolescent idiopathic scoliosis elongated the spinal canal. The preoperative proximal, main thoracic, and thoracolumbar/lumbar Cobb angles are moderate predictors of postoperative spinal canal length after scoliosis surgery. CLINICAL RELEVANCE It is important to understand how much the spinal canal is elongated after surgery to lessen the risk of intraoperative and postoperative neurological complications.
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Affiliation(s)
- Yasuhito Yahara
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Shoji Seki
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Hiroto Makino
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Kei Watanabe
- Department of Orthopaedic Surgery, Niigata University Medicine and Dental General Hospital, Niigata, Japan
| | - Masashi Uehara
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Jun Takahashi
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tomoatsu Kimura
- Department of Orthopaedic Surgery, Faculty of Medicine, University of Toyama, Toyama, Japan
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10
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Lo YL, Tan YE, Raman S, Teo A, Dan YF, Guo CM. Systematic re-evaluation of intraoperative motor-evoked potential suppression in scoliosis surgery. SCOLIOSIS AND SPINAL DISORDERS 2018; 13:12. [PMID: 29988605 PMCID: PMC6027569 DOI: 10.1186/s13013-018-0161-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/12/2018] [Indexed: 11/10/2022]
Abstract
Background Motor- (MEP) and somatosensory-evoked potentials (SSEP) are susceptible to the effects of intraoperative environmental factors. Methods Over a 5-year period, 250 patients with adolescent idiopathic scoliosis (AIS) who underwent corrective surgery with IOM were retrospectively analyzed for MEP suppression (MEPS). Results Our results show that four distinct groups of MEPS were encountered over the study period. All 12 patients did not sustain any neurological deficits postoperatively. However, comparison of groups 1 and 2 suggests that neither the duration of anesthesia nor speed of surgical or anesthetic intervention were associated with recovery to a level beyond the criteria for MEPS. For group 3, spontaneous MEPS recovery despite the lack of surgical intervention suggests that anesthetic intervention may play a role in this process. However, spontaneous MEPS recovery was also seen in group 4, suggesting that in certain circumstances, both surgical and anesthetic intervention was not required. In addition, neither the duration of time to the first surgical manoeuver nor the duration of surgical manoeuver to MEPS were related to recovery of MEPS. None of the patients had suppression of SSEPs intraoperatively. Conclusion This study suggests that in susceptible individuals, MEPS may rarely occur unpredictably, independent of surgical or anesthetic intervention. However, our findings favor anesthetic before surgical intervention as a proposed protocol. Early recognition of MEPS is important to prevent false positives in the course of IOM for spinal surgery.
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Affiliation(s)
- Yew Long Lo
- 1Department of Neurology, National Neuroscience Institute, Singapore General Hospital, Outram Road, Academia Level 4, Singapore, 169608 Singapore.,2Duke-NUS Medical School, Singapore, Singapore
| | - Yam Eng Tan
- 3Singapore General Hospital, Singapore, Singapore
| | | | - Adeline Teo
- 3Singapore General Hospital, Singapore, Singapore
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