耳蜗外电刺激诱发听力正常幼猫听性脑干反应

The Application of the EABR to Normal Hearing Kittens with Promontory Stimulation

王伟伟;张道行;张岩昆;田昊;

1:首都医科大学附属北京友谊医院耳鼻咽喉科

摘要
目的探讨幼猫蜗外电诱发听性脑干反应(electrically audiotory brainstemresponses,EABR)检测的可行性,总结猫蜗外EABR的波形特点。方法选取健康幼猫13只,氯胺酮(50mg/kg)肌注麻醉后,首先行ABR测试,选取听力正常耳行蜗外EABR检测。结果13只健康幼猫中,23耳听力正常,对其中21耳行EABR检测,皆可记录到EABR波形,可以记录到Ⅱ、Ⅲ、Ⅳ、Ⅴ波,其中波Ⅲ和波Ⅳ最清晰,波Ⅰ因被刺激伪迹所掩盖一般记录不到。其EABR波形与ABR相似,振幅随刺激强度的减小而减小,潜伏期随刺激强度的减小而延长。刺激电流强度为1mA时,EABR波Ⅱ、Ⅲ、Ⅳ的潜伏期分别为1.60±0.09、2.38±0.10、2.93±0.13ms,较ABR相应的波潜伏期明显缩短。与ABR相比,EABR的Ⅱ-Ⅲ、Ⅲ-Ⅳ、Ⅱ-Ⅳ波间期分别平均缩短约0.24、0.19、0.41ms,差异均有统计学意义(P<0.05)。结论通过一系列减少伪迹干扰的方法,可稳定地记录到听力正常幼猫蜗外EABR波形,其波形与ABR相似,但各波潜伏期及波间期均较ABR缩短。
关键词
电诱发听性脑干反应;听性脑干反应;蜗外电刺激;幼猫
基金项目(Foundation):
作者
王伟伟;张道行;张岩昆;田昊;
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