Abstract
The follow-up retest of hearing change and vestibule function test were performed on the patients of Tokyo Diabetic Society. Among 58 cases of perceptive deafness in 127 cases tested 3 years prior to the retest, only 38 cases were possible to do the follow-up retest. All examples were exclusive of non-diabetic factors.
On the retest, 27 cases in 38 cases showed hearing change in the 3 years interval. The hearing of the 27 cases mostly fluctuated and progressed to the advanced hearing loss.
The vestibule function test was performed on 55 diabetic cases. Out of 55 cases, 46 cases showed perceptive deafness and 9 cases showed normal hearing. As the results, spontaneous nystagmus were positive in 6 cases and an abnormal response to caloric tests were accounted in 22 cases among 46 perceptive deafness cases and 4 cases among 9 normal hearing cases. In either case, there was not much difference of caloric response on the both side. As a whole, a lowering of reaction was conspicuous.
In the conclusion, the inner ear disorder of diabetic patient was caused by morbid of the inner ear blood vessel and nerve atrophy or degeneration, if any, might be a secondary change.
