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 language | English (US) |
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Pages (from-to) | 308-315 |
Number of pages | 8 |
Journal | Journal of Neurological Surgery, Part B: Skull Base |
Volume | 73 |
Issue number | 5 |
DOIs | |
State | Published - Jan 1 2012 |
Externally published | Yes |
Keywords
- Angle
- Cerebellopontine
- Facial nerve
- Intraoperative electrophysiologic monitoring
- Transcranial motor-evoked potential
ASJC Scopus subject areas
- Clinical Neurology