Pressure transmission properties from the externa ear canal to the inner ear. An experimental study using guinea pigs.
Pressure transmission properties from the externa ear canal to the inner ear. An experimental study using guinea pigs.
复制标题
从外耳道到内耳的压力传输特性。
DOI：
10.3109/00016488809125083
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
N. Yanagihara
中科院分区：
文献类型：
--
作者：
K. Gyo;S. Nishihara;N. Yanagihara
在豚鼠上交替打开和关闭耳泡穿孔时，测量内耳压力（PIE）对外耳道压力变化的响应。当大泡打开时，只有一个瞬时的压力传递到内耳，PIE的振幅小于当大泡关闭时相应的PIE的振幅。这是因为施加的压力仅通过听骨链传递到内耳。当耳泡闭合时，压力不仅通过听骨链，而且通过圆窗（RW）通过中耳腔传递。当肺大疱闭合时，正压力负荷时PIE的幅值大于负压力负荷时的幅值。PIE的振幅显示出与耳道压力的线性关系，至少在+/- 200 mmH 2 O范围内，只要压力缓慢施加到耳道。当加载压力突然改变时，诱发了可能反映RW弹性的弹跳响应，当人为破裂圆窗时，该弹跳响应减弱或消失。
The inner ear pressure (PIE) in response to pressure changes in the external ear canal was measured in guinea pigs while alternatively opening and closing the perforation of the otic bulla. When the bulla was opened, only a transient degree of applied pressure was transmitted to the inner ear and the amplitude of the PIE was smaller than that of the corresponding PIE when the bulla was closed. This was because the applied pressure was exclusively transmitted to the inner ear via the ossicular chain. When the otic bulla was closed, the pressure was transmitted not only via the ossicular chain but also via the round window (RW) through the middle ear cavity. When the bulla was closed, the amplitude of PIE was larger by a positive pressure load than by the corresponding negative one. The amplitude of PIE showed a linear relationship to ear canal pressure of at least within the +/- 200 mmH2O range, as long as pressure was slowly applied to the ear canal. When the loading pressure was abruptly changed, a bouncing response, possibly reflecting elasticity of the RW, was evoked, which diminished or disappeared when the round window was artificially ruptured.