Predictive value of intraoperative neurophysiological monitoring during cervical spine surgery: a prospective analysis of 1055 consecutive patients

Journal of Neurosurgery: Spine - Tập 8 Số 3 - Trang 215-221 - 2008
Michael Kelleher1, Gamaliel Tan, Roger Sarjeant, Michael G. Fehlings
1Spinal Program, Krembil Neuroscience Centre, Toronto Western Hospital, University Health Network, Ontario, Canada.

Tóm tắt

Object Despite the growing use of multimodal intraoperative monitoring (IOM) in cervical spinal surgery, limited data exist regarding the sensitivity, specificity, and predictive values of such a technique in detecting new neurological deficits in this setting. The authors sought to define the incidence of significant intraoperative electrophysiological changes and new postoperative neurological deficits in a cohort of patients undergoing cervical surgery. Methods The authors conducted a prospective analysis of a consecutive series of patients who had undergone cervical surgery during a 5-year period at a university-based neurosurgical unit, in which multimodal IOM was recorded. Sensitivity, specificity, positive predictive values (PPVs), and negative predictive values (NPVs) were determined using standard Bayesian techniques. The study population included 1055 patients (614 male and 441 female) with a mean age of 55 years. Results The IOM modalities performed included somatosensory evoked potential (SSEP) recording in 1055 patients, motor evoked potential (MEP) recording in 26, and electromyography (EMG) in 427. Twenty-six patients (2.5%) had significant SSEP changes. Electromyographic activity was transient in 212 patients (49.6%), and 115 patients (26.9%) had sustained burst or train activity. New postoperative neurological deficits occurred in 34 patients (3.2%): 6 had combined sensory and motor deficits, 7 had new sensory deficits, 9 had increased motor weakness, and 12 had new root deficits. Of these 34 patients, 12 had spinal tumors, of which 7 were intramedullary. Overall, of the 34 new postoperative deficits, 21 completely resolved, 9 partially resolved, and 4 had no improvement. The deficits that completely resolved did so on average 3.3 months after surgery. Patients with deficits that did not fully resolve (partial or no improvement) were followed up for an average of 1.8 years after surgery. Somatosensory evoked potentials had a sensitivity of 52%, a specificity of 100%, a PPV of 100%, and an NPV of 97%. Motor evoked potential sensitivity was 100%, specificity 96%, PPV 96%, and NPV 100%. Electromyography had a sensitivity of 46%, specificity of 73%, PPV of 3%, and an NPV of 97%. Conclusions Combined neurophysiological IOM with EMG and SSEP recording and the selective use of MEPs is helpful for predicting and possibly preventing neurological injury during cervical spine surgery.

Từ khóa


Tài liệu tham khảo

10.1097/01.brs.0000240642.28495.99

10.1097/00007632-198707000-00005

10.1016/j.spinee.2003.06.001

10.1097/01.BRS.0000083202.62956.A8

10.1097/01.bsd.0000173315.06025.c6

10.1097/01.brs.0000232707.98076.37

Flynn TB, 1984, J La State Med Soc, 136, 6

10.1097/01.BRS.0000115144.30607.E9

10.1097/01.bsd.0000174566.19640.f1

10.1159/000121199

10.3171/foc.2004.16.2.1

10.3171/spi.2004.1.3.0243

10.1097/01.brs.0000228724.01795.a2

10.1002/ana.410190105

Linn S, 2004, J Stat Ed, 12, 3

10.1097/01.ana.0000211007.94269.50

10.1097/00007632-200301150-00018

10.3171/jns.1996.85.4.0566

10.1097/00006123-199712000-00017

10.1097/00007632-199912150-00012

10.1016/j.nec.2006.05.008

10.1097/01.brs.0000231687.02271.b6

10.1097/00006123-200211000-00015

10.1016/j.nec.2004.04.019

10.1007/s10877-006-9032-1

Sebastian C, 1997, Eur Spine J, 6, 316, 10.1007/BF01142677

10.1097/01.BRS.0000049926.43292.93

Thuet ED, 2005, Spine, 30, 2094, 10.1097/01.brs.0000178845.61747.6a

Wiedemayer H, 2004, J Neurol Neurosurg Psychiatry, 75, 280

Thông tin
Thông tin xuất bản

Journal of Neurosurgery: Spine

Tập 8 Số 3

215-221

Thông tin tác giả