短音骨导听性稳态反应中伪迹的研究

Artifactual Responses when Recording Auditory Steady-State Responses to Bone-Conduction Stimuli

刘辉;莫玲燕;陈静;

1:首都医科大学附属北京同仁医院耳鼻咽喉头颈科学教育部重点实验室(首都医科大学)

摘要
目的研究短音骨导听性稳态反应中的伪迹问题。方法对21例(21耳)双耳极重度感音神经性聋患儿行骨导ASSR检测,刺激信号为0.5~4kHz倍频程的短音(tonepip),0.5kHz刺激信号上升、下降时间均为4ms;1、2、4kHz为2ms,0.5、1、2、4kHz刺激信号的刺激速率分别为77、85、93、101Hz。通过B-71骨振器给声,记录ASSR波形并观察是否出现伪迹,分析其原因。结果 1、4kHz出现伪迹的强度分别为115和100.5dB,0.5和2kHz分别在120.5和112dB(re:1μN)(以上强度约相当于听力级的60dBHL)未出现伪迹。结论骨导AS-SR的最大输出较气导小,且易出现伪迹,故骨导听力损失超过中度以上者,不宜行短音骨导听性稳态反应测试。
关键词
听性稳态反应;骨导;儿童
基金项目(Foundation):
作者
刘辉;莫玲燕;陈静;
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刘辉莫玲燕陈静