1989 Volume 32 Issue 3 Pages 159-166
One hundred and sixty-eight patients with sudden deafness visiting Nagasaki University Hospital were examined by electrocochleography (ECochG). There is a very close relationship between detection threshold of cochlear microphonics (CM) and the hearing level at the final stage of the disease, irrespectively to the time of examination. It is likely that the detection threshold of CM is determined by the severity of impairment of hair cells at an early stage of disease. Therefore, CM responses also allow one to predict how much the hearing can be improved, no matter at what stage of the disease ECochG is performed.
