メニエール病における蝸牛基底板進行波速度の検討
Derived ABR の手法を用いた測定
1993 年 52 巻 3 号 p. 315-321
詳細
1993 年 52 巻 3 号 p. 315-321
This study shows that auditory brainstem response (ABR) can be used to measure the basilar membrane travelling wave velocity (TWV). TWV was calculated from the latency difference between wave V of the different derived ABRs and the cochlear location distance between the appropriate derived band center. frequency. The latency of wave V of derived ABR produced by six noise masked ABRs with the use of high pass filtered noises and the location of the corresponding cochlear partition (distance from the stapes footplate) were measured and five TWVs were estimated from these data.
Ten subjects with normal hearing, seven patients with Ménière's disease and eight patients with sensori-neural hearing loss (SNHL) were examined. The TW V in the SNHL group was within normal limits at all frequencies, whereas the TWV at 8 kHz in the Meni6re group greatly exceeded that of the normal and SNHL group. This finding suggests that the measurement of basilar membrane TWV using derived ABR contributes to the diagnosis of Ménière's disease and the estimation of inner ear pathology.
