Editor's Note: This Manuscript was accepted for publication July 21, 2011.
Article first published online: 21 OCT 2011
Copyright © 2011 The American Laryngological, Rhinological, and Otological Society, Inc.
Volume 121, Issue 11, pages 2295–2298, November 2011
How to Cite
Marin, P., Pouliot, D. and Fradet, G. (2011), Facial nerve outcome with a Peroperative stimulation threshold under 0.05 mA . The Laryngoscope, 121: 2295–2298. doi: 10.1002/lary.22359
Presented as a poster at the 64th Annual Meeting of the Canadian Society of Otolaryngology–Head and Neck Surgery, Niagara Falls, Ontario, Canada, May 23–25, 2010.
The authors have no funding, financial relationships, or conflicts of interest to disclose.
- Issue published online: 21 OCT 2011
- Article first published online: 21 OCT 2011
- Vestibular schwannoma;
- facial nerve outcome;
- facial nerve function;
- stimulation threshold;
- Level of Evidence: 2b.
To evaluate the facial nerve outcome postoperatively of schwannoma vestibular surgery with a stimulation threshold (ST) lower than 0.05 mA.
Retrospective chart review.
A total of 106 patients had undergone schwannoma vestibular surgery between 2002 and 2008 in a tertiary center. The ST near the brainstem was obtained after the tumor removal. Facial nerve function was evaluated according to the House-Brackmann (HB) scale immediately postoperatively and at 1 year. The results were compared among the different STs used: <0.05 mA, 0.05 mA, and >0.05 mA.
There were 50 patients who had an ST <0.05 mA, 45 patients who had an ST of 0.05 mA, and 11 patients who had a ST >0.05 mA. Immediately postoperatively, for all of these groups we had a preservation of facial nerve function (HB I-II) in 94%, 80%, and 36% of patients, respectively (P < .0001). At 1 year in the same groups the preservation of the facial nerve function was 100%, 93%, and 82% of patients, respectively (P < .01).
A proximal ST of <0.05 mA is a better predictor of facial nerve function immediately postoperatively. Laryngoscope, 121:2295–2298, 2011