Electrocochleography in the presence and absence of perilymphatic fistula.
Electrocochleography in the presence and absence of perilymphatic fistula.
复制标题
耳蜗电图检查是否存在外淋巴瘘。
DOI：
10.1177/000348949210100505
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Harker,LA
中科院分区：
文献类型：
--
作者：
Campbell,KC;Savage,MM;Harker,LA
The purpose of the present study was to evaluate the effect of an acute perilymphatic fistula on the amplitude ratio (SP/AP) of the summating potential (SP) and action potential (AP). The effect of the acute fistula on AP threshold was also addressed. Electrocochleo-graphic recordings were obtained before and immediately after surgical laceration of the round window membrane in 19 guinea pigs. Stimuli comprised clicks and 2,000-Hz and 8,000-Hz tone bursts, presented initially at 100 dB peak equivalent sound pressure level and in descending 10-dB steps. After fistula induction the SP/AP significantly increased for the click and 8,000-Hz tone burst stimuli but not for the 2,000-Hz tone burst stimuli. No significant change in AP threshold occurred. These findings suggest that the SP/AP may be sensitive to perilymphatic fistula, at least in guinea pigs. The changes in the SP/AP do not appear to be related to changes in threshold.
