摘要
为解决表面电极引导耳蜗微音器电位（ＣＭ）的结果中存在刺激伪迹信号的状况，探讨了用自适应滤波处理抵消刺激伪迹信号提取ＣＭ的方法。结果发现：正常耳的ＣＭ较同侧表面电极引导的波形有一定的滞后时间，２ｋＨｚ以上的神经动作电位（ＡＰ）波形分化明显；３１耳（７７．５％）极重度感音神经性聋和１１耳（２７．５％）中度或中重度感音神经性聋耳各频率的ＣＭ消失，９耳（２２．５％）极重度感音神经性聋和２９耳（７２．５％）中度或中重度感音神经性聋各频率存在较好的ＣＭ波形。提示：不同程度的感音神经性聋可根据本方法进一步分为感受器部分引起的听力损失和蜗后病变引起的听力损失。
In order to delete the contamination of acoustic stimulus artefact in average evoked cochlear microphonics by surface recording, an application of adaptive filtering technique for cancelling the stimulus artefact from the cochlear microphonics was proposed. The results demonstrated that in normal hearing ears, the cochlear microphonic potentials (CM) which was obtained by adaptive filtering technique was later than the ipsilateral response,whereas the AP response could be seen in the ipsilateral response to 2kHz、4kHz and 8kHz stimuli. In 31(77.5%) ears with profound sensorineural hearing loss and 29(27.5%) ears with moderate to severe sensorineural hearing loss,the CM was absent, but in the other ears the CM was as clear as in ears with normal hearing. It suggests that by this technique sensorineural hearing loss can be further differentiated into two kinds: neural hearing loss and sensory hearing loss.
出处
《中华耳鼻咽喉科杂志》
CSCD
1997年第3期167-170,共4页
Chinese Journal of Otorhinolaryngology
关键词
耳蜗微音电位
动作电位
听觉丧失
Cochlear microphonic potentials Action potentials Hearing loss, sensorineural
