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Analysis of wave III of brain stem auditory evoked potential waveforms during microvascular decompression of cranial nerve VII for hemifacial spasm

Thirumala, PD and Krishnaiah, B and Crammond, DJ and Habeych, ME and Balzer, JR (2014) Analysis of wave III of brain stem auditory evoked potential waveforms during microvascular decompression of cranial nerve VII for hemifacial spasm. In: UNSPECIFIED.

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Abstract

INTRODUCTION:: Intraoperative monitoring of brain stem auditory evoked potential during microvascular decompression (MVD) prevent hearing loss (HL). Previous studies have shown that changes in wave III (wIII) are an early and sensitive sign of auditory nerve injury. OBJECTIVE:: To evaluate the changes of amplitude and latency of wIII of brain stem auditory evoked potential during MVD and its association with postoperative HL. Hearing loss was classified by American Academy of Otolaryngology - Head and Neck Surgery (AAO-HNS) criteria, based on changes in pure tone audiometry and speech discrimination score. METHODS:: Retrospective analysis of wIII in patients who underwent intraoperative monitoring with brain stem auditory evoked potential during MVD was performed. A univariate logistic regression analysis was performed on independent variables amplitude of wIII and latency of wIII at change max and On-Skin, or a final recording at the time of skin closure. A further analysis for the same variables was performed adjusting for the loss of wave. RESULTS:: The latency of wIII was not found to be significantly different between groups I and II. The amplitude of wIII was significantly decreased in the group with HL. Regression analysis did not find any increased odds of HL with changes in the amplitude of wIII. CONCLUSIONS:: Changes in wave III did not increase the odds of HL in patients who underwent brain stem auditory evoked potential s during MVD. This information might be valuable to evaluate the value of wIII as an alarm criterion during MVD to prevent HL. © 2014 by the American Clinical Neurophysiology Society.


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Details

Item Type: Conference or Workshop Item (UNSPECIFIED)
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Thirumala, PDthirumal@pitt.eduTHIRUMAL
Krishnaiah, B
Crammond, DJcrammond@pitt.eduCRAMMOND
Habeych, ME
Balzer, JRjeb23@pitt.eduJEB23
Centers: Other Centers, Institutes, or Units > Center for Neuroscience
Date: 1 January 2014
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title: Journal of Clinical Neurophysiology
Volume: 31
Number: 2
Page Range: 127 - 132
DOI or Unique Handle: 10.1097/wnp.0000000000000042
Institution: University of Pittsburgh
Schools and Programs: University libraries > Health Sciences Library System
Refereed: Yes
ISSN: 0736-0258
Other ID: T 1760
Date Deposited: 26 Nov 2012 19:43
Last Modified: 15 Oct 2017 06:55
URI: http://d-scholarship.pitt.edu/id/eprint/16411

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