Document Detail

Novel method for vestibular evoked myogenic potentials: technique and reproducibility.
MedLine Citation:
PMID:  23092831     Owner:  NLM     Status:  In-Data-Review    
ABSTRACTObjective:A novel method was employed to control the sternocleidomastoid muscle contraction level during vestibular evoked myogenic potential (VEMP) measurement.Study Design:A prospective study to measure the normal VEMP response.Settings:A pressure feedback device composed of a firm rubber bulb and a pressure gauge was employed to monitor the muscular contraction level during measurement.Methods:Nineteen normal-hearing subjects (12 males; mean age 34.0 ± 7.7 years) were tested. Subjects were instructed to position the chin on the rubber bulb and use the neck flexors to maintain a pressure of 120 mm Hg during the measurement.Main Outcome Measures:The P13 latencies, N23 latencies, and P13-N23 amplitudes were recorded. In nine subjects, the reproducibility of the technique was tested weekly for 3 consecutive weeks.Results:The average (± SD) latency of P13 was 13.97 ± 1.33 ms, and the latency of N23 was 24.03 ± 1.79 ms. The average amplitude was 66.89 ± 44.1 μV. There was no significant difference between right and left ears in P13 latencies, N23 latencies, and P13-N23 amplitudes. In nine subjects, the average measured interclass correlation coefficient was 0.97 in amplitude, 0.8 in P13 latency, and 0.93 in N23 latency in three consecutive weekly measurements.Conclusions:The chin-rest pressure feedback method is easy to perform during VEMP testing. Subjects can maintain a constant level of sternocleidomastoid contraction and neck flexion to facilitate this response with a high degree of test-retest reliability. This technique provides a means to compare VEMPs across different clinical scenarios over time.
Wei Qian; David Houlden; Julija Adamonis; Joseph M Chen; Ze-Zhang Tao
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of otolaryngology - head & neck surgery = Le Journal d'oto-rhino-laryngologie et de chirurgie cervico-faciale     Volume:  41     ISSN:  1916-0216     ISO Abbreviation:  J Otolaryngol Head Neck Surg     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101479544     Medline TA:  J Otolaryngol Head Neck Surg     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  303-8     Citation Subset:  IM    
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