Reproducibility (test-retest) of vestibular evoked myogenic potential

Revista Brasileira de Otorrinolaringologia

Pereira, Liliane Desgualdo¹  Oliveira, Aline Cabral de²  Menezes, Pedro de Lemos³ 

[1] Universidade Federal de Sergipe, Aracaju, Brazil;Universidade Federal de São Paulo, São Paulo, Brazil;Universidade de São Paulo, São Paulo, Brazil

关键词: Evoked potentials;    Vestibule labyrinth;    Vestibular nerve;    Electromyography.;   

DOI  :  10.1016/j.bjorl.2014.04.001

学科分类：医学（综合）

来源: Associacao Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial

【 摘 要 】

INTRODUCTION:There is still no consensus in the literature as to the best acoustic stimulus for capturing vestibular evoked myogenic potential (VEMP). Low-frequency tone bursts are generally more effective than high-frequency, but recent studies still use clicks. Reproducibility is an important analytical parameter to observe the reliability of responses.OBJECTIVE:To determine the reproducibility of p13 and n23 latency and amplitude of the VEMP for stimuli with different tone-burst frequencies, and to define the best test frequency.METHODS:Cross-sectional cohort study. VEMP was captured in 156 ears, on the sternocleidomastoid muscle, using 100 tone-burst stimuli at frequencies of 250, 500, 1000, and 2000 Hz, and sound intensity of 95 dB nHL. Responses were replicated, that is, recorded three times on each side.RESULTS:No significant difference was observed for p13 and n23 latencies of the VEMP, captured at three moments with tone-burst stimuli at 250, 500, and 1000 Hz. Only the frequency of 2000 Hz showed a difference between captures of this potential (p < 0.001). p13 and n23 amplitude analysis was also similar in the test-retest for all frequencies analyzed.CONCLUSION:p13 and n23 latencies and amplitudes of VEMP for tone-burst stimuli at frequencies of 250, 500, and 1000 Hz are reproducible.

【 授权许可】

CC BY