Pure tone audiometry, retrocochlear hearing test and acoustic brain stem response test were performed in 68 patients treated with hemodialysis and the following results were obtained.
1: Hearing loss was found in 103 ears of 136 test ears and the degree of hearing impairment was more significant in high frequency.
2: Retrocochlear type of hearing loss was demonstrated in patients treated with hemodialysis.
3: Retrocochlear type of hearing loss was in accordance with the level of anemia and it seemed to be improved by hemodialysis.
4: Retrocochlear hearing loss observed in patients with hemodialysis is suggested to be caused by functional disturbance rather than organic lesion.
5: The acoustic brain stem response was normal and the latency of Nv was within normal limit in our study.