P71-F Clinical use of vestibular evoked myogenic potential (VEMP) in unilateral Menière disease (MD)

Background VEMP test averages myogenic responses evoked by sound that stimulates otolithic organs in the inner ear. is an inner ear pathology characterised by episodic attacks of vertigo and fluctuating cochlear symptoThe aim of the study is to describe the VEMP values obtained in patients diagnosed with unilateral MD. Materials and methods VEMP studies performed in patients diagnosed with unilateral younger than 60 years old and done between 2014 and 2017 were analysed. VEMPs were recorded from the ipsilateral sternocleidomastoid muscle (cVEMP) and periocular sites (oVEMP). 500 Hz tone burst at 105 dB nHL was used as stimuli at 5 Hz stimulation rate and averaged for 200 repetitions. Bandpass-filtered between 20 Hz and 2 kHz. Statistical analysis included paired sample test in the SPSS program. We compared latency and amplitude of the affected side (AS) with healthy side (HS). Results We included 9 patients, mean age 48.7 ± 6.8 years old. Patients without bilateral response (1 in cVEMP, 2 in oVEMP), were not included in the statistical analysis of its category. In 87.5% of the cases, p13 latency was longer in AS (13.5–21.1 ms) vs HS (12.9–15.9 ms, p = .017 Wilcoxon test). No statistically significant differences were obtained in the remaining parameter. Conclusion The p13 latency of cVEMP is longer on the affected side with compared to the contralateral healthy side. Since VEMP test clinically evaluates the otolithic function, it is not invasive and is well tolerated, its use should be extended.