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Journal of Clinical Monitoring and Computing

, Volume 20, Issue 6, pp 437–444 | Cite as

Neurophysiological Identification of Position-Induced Neurologic Injury During Anterior Cervical Spine Surgery

  • Daniel M. Schwartz
  • Anthony K. Sestokas
  • Alan S. Hilibrand
  • Alexander R. Vaccaro
  • Bikash Bose
  • Mark Li
  • Todd J. Albert
Specialty Section on Surgical Neuromonitoring

Abstract

This study was a retrospective review of 3,806 patients who underwent anterior cervical spine surgery with multi-modality neurophysiological monitoring consisting of transcranial electric motor evoked potentials, somatosensory evoked potentials and spontaneous electromyography between 1999–2003. The objectives of this study were twofold: (1) to evaluate the role of transcranial electric motor evoked potential tceMEP and ulnar nerve somatosensory evoked potential (SSEP) monitoring for identifying impending position-related stretch brachial plexopathy, peripheral nerve entrapment/compression or spinal cord compression and (2) to estimate the point-prevalence of impending neurologic injury secondary to surgical positioning effects. Sixty-nine of 3,806 patients (1.8% showed intraoperative evidence of impending neurologic injury secondary to positioning, prompting interventional repositioning of the patient. The brachial plexus was the site of evolving injury in 65% of these 69 cases. Impending brachial plexopathy was most commonly noted immediately following shoulder taping and the application of counter-traction. Brachial plexus stretch upon neck extension for optimal surgical access and visualization was second in frequency-of-occurrence. Evolving traction injury to the ulnar nerve attributed to tightly-wrapped or malpositioned arms was observed in 16% of alerted cases, whereas evolving spinal cord injury following neck extension accounted for an additional 19%. This study highlights the role of tceMEP and ulnar nerve SSEP monitoring for detecting emerging peripheral nerve injury secondary to positioning in preparation for and during anterior cervical spine surgery.

Keywords

intraoperative neurophysiological monitoring anterior cervical spine surgery surgical positioning transcranial electric motor evoked potentials somatosensory evoked potentials brachial plexopathy positional peripheral nerve injury 

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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • Daniel M. Schwartz
    • 1
  • Anthony K. Sestokas
    • 1
  • Alan S. Hilibrand
    • 1
  • Alexander R. Vaccaro
    • 1
  • Bikash Bose
    • 1
  • Mark Li
    • 1
  • Todd J. Albert
    • 1
  1. 1.Surgical Monitoring Associates, Inc.Bala CynwydPennsylvania

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