Intraoperative transcranial motor-evoked potential monitoring of the facial nerve during cerebellopontine angle tumor resection

Maura K. Cosetti, Ming Xu, Andrew Rivera, Daniel Jethanamest, Maggie Kuhn, Aleksandar Beric, John G. Golfinos, J. Thomas Roland

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Objective: To determine whether transcranial motor-evoked potential (TCMEP) monitoring of the facial nerve (FN) during cerebellopontine angle (CPA) tumor resection can predict both immediate and long-term postoperative FN function. Design: Retrospective review. Setting: Tertiary referral center. Main Outcome Measures: DeltaTCMEP (fi nal-initial) and immediate and long-term facial nerve function using House Brackmann (HB) rating scale. Results: Intraoperative TCMEP data and immediate and follow-up FN outcome are reported for 52 patients undergoing CPA tumor resection. Patients with unsatisfactory facial outcome (HB > 2) at follow-up had an average deltaTCMEP of 57 V, whereas those with HB I or II had amean deltaTCMEP of 0.04 V (t = -2.6, p <0.05.) Intraoperative deltaTCMEP did not differ signifi cantly between groups with satisfactory (HB I, II) and unsatisfactory (HB > 2) facial function in the immediate postoperative period. Conclusion: Intraoperative TCMEP of the facial nerve can be a valuable adjunct to conventional facial nerve electromyography during resection of tumors at the CPA. Intraoperative deltaTCMEP >57 V may be worrisome for long-term recovery of satisfactory facial nerve function.

Original languageEnglish (US)
Pages (from-to)308-315
Number of pages8
JournalJournal of Neurological Surgery, Part B: Skull Base
Volume73
Issue number5
DOIs
StatePublished - Jan 1 2012
Externally publishedYes

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Keywords

  • Angle
  • Cerebellopontine
  • Facial nerve
  • Intraoperative electrophysiologic monitoring
  • Transcranial motor-evoked potential

ASJC Scopus subject areas

  • Clinical Neurology

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