Dehydration testing and the diagnosis of Menière's disease: case report.

A 34-year-old female presented to our clinic with complaints of hearing loss, tinnitus, and severe rotational vertigo. A test battery including complete audiometric testing, auditory brainstem response (ABR) audiometry, electronystagmography (ENG), electrocochleography (ECoG), and dehydration testing was performed. Monitoring of hearing sensitivity, speech understanding, and ECoG responses following administration of a dehydrating agent were sensitive measures of cochlear function and confirmed the diagnosis of Meniere's disease. The induced changes also contributed to the therapeutic measures recommended.