Relation between Fluctuation of Hearing Loss and Results of Vestibular Test in Meniere's Disease:with Special Reference to Investigation by Contraves' Computerized Rotary Chair System

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To investigate the relation between the fluctuant course of hearing loss and the change of vestibular sign, the pure-tone audiometry and the trapezoid rotation test (±2, 4, 6, 8 and 10°/sec<SUP>2</SUP>, 10″) using Contraves' computerized rotary chair system were performed every 3 or 10 days for 10 patients of Meniere's disease. These patients experienced vertiginous attacks several times during this observation.<BR>Testing results before the attack showed exacerbation of hearing loss, and appearance of ipsilateral labyrinthine preponderance. During the glycerol test, hearing loss, especially in low frequency, was improved, and ipsilateral labyrinthine preponderance was disappeared.<BR>Exacerbation of hearing loss and appearance of ipsilateral labyrinthine preponderance were thought to be caused by development of the endolymphatic hydrops. As these findings were noticed in the preepisodic stage, they would be important indicators to predict the next attack of Meniere's disease.
日本めまい平衡医学会の論文