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  • Title: [Audiological diagnosis of cochleovestibular disorders caused by internal ear hydrops].
    Author: Levina IuV.
    Journal: Vestn Otorinolaringol; 2005; (6):25-7. PubMed ID: 16353004.
    Abstract:
    A total of 75 patients with clinical signs of internal ear hydrops (IEH) were examined using dehydration tests and electrocochleography. The patients were divided into groups by the results of pure tone threshold audiometry according to the international classification. Both methods proved highly informative. Positive dehydration tests were obtained in 57% cases, positive electrocochleography evidence was observed in 73% cases. An increased SP/AP amplitude was seen in 65% cases. Both methods allowed IEH detection in 82% cases. In normal hearing and hypoacusis of the first degree electrocochleography is more effective than dehydration tests in detection of IEH, but with hearing loss deterioration this advantage lessens. It is shown that patients can suffer from IEH in normal values of pure tone threshold audiometry. This should be taken into consideration in examination of patients who do not complain of hypoacusis.
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