抄録
Hearing and tinnitus of 176 patients (in 76 of them, deafness was objectively observed) to whom SM was injected, were observed and the result was as follows
1) There was no relation between auditory disturbance revelation ratio and age.
2) Auditory disturbances occurred most frequently in the daily injected, and developed often into severer deafness even after the stop of SM-injection.
3) In many of the twice in week injected, auditory disturbances made no further progress after the stop of SM-use.
4) Only 4 in all instances had a dip-type.
5) Impaired patients had frequently no tinnitus (ca. 22.4%), while 1/3 of tinnitus-troublers had no hearing loss.
6) Tinnitus was of various types, but the high-pitched tinnitus was most frequent.
Through the above clinical observation, c5 dip and schema of the development of hearing impairment by Takafuji et al were inspected. Further, from temporal by-effects and changes in peripheral blood-vessel etc., the problem of the individual differences in disturbance occurrence and constitution has been mentioned.
