[Evoked otoacoustic emission in conduction of dehydration tests in patients with Meniere's disease].

We studied potentiality of the test of evoked otoacoustic emission (EOAE) for monitoring of dynamic changes in the internal ear in conduction of dehydration tests. In parallel to registration of tonal hearing thresholds and speech intelligibility in conduction of dehydration tests we registered two classes of EOAE: delayed EOAE (DEOAE) and distortion product otoacoustic emission (DPOAE). Of 36 examinees, we registered DEOAE prior to dehydration in 22 patients. By audiometry, these patients had hearing under 40 dB lower the hearing threshold at frequencies 250-4000 Hz. In registration of DEOAE in dynamics a maximal amplitude increase was seen 2 hours after intake of glycerin. A mean amplitude increase was 7.0+/-2.3 dB. Before dehydration DEOAE was recorded in 26 of 36 patients. Two hours laser otoacoustic response was registered in 29 patients. Hearing loss was not more than 60 dB at frequencies 250-4000 Hz. A maximal amplitude increase was seen in 2 hours. A mean amplitude increase in dehydration was 7.3+/-3.7 dB.