日本耳鼻咽喉科学会会報
Online ISSN : 1883-0854
Print ISSN : 0030-6622
ISSN-L : 0030-6622
蝸電図よりみた突発性難聴の病態および予後判定
平杉 嘉昭矢富 泰治水越 治
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1979 年 82 巻 9 号 p. 869-878

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20 patients with sudden deafness were examined by electrocochleography (ECochG). The cochlear potentials such as AP, CM and SP were investigated both at the early stage of the disease and 2 to 4 weeks later. There was a significant difference in the cochlear potentials between the cases with remarkable hearing improvement and with improvement. In all cases whose SP/AP ratio was more than 0. 27, hearing improvement was obtained. The SP/AP ratio returned normal (about 0. 25), after the hearing recovery. It was concluded that the SP/AP ratio in ECochE might be very helpful in studying the prognosis of sudden deafness.

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