耳科正常成人短纯音及切迹噪声掩蔽短纯音诱发的ABR比较

Comparison of Auditory Brain Stem Responses to Tone Burst and Tone Burst Masked by Notched Noise Recorded in Adults with Normal Hearing

邹琦娟;倪道凤;李奉蓉;徐春晓;商莹莹;张志勇;

1:中国医学科学院北京协和医学院北京协和医院耳鼻咽喉科

摘要
目的在耳科正常成人中比较短纯音(tone burst)及同侧切迹噪声(notched noise)掩蔽短纯音诱发的听性脑干反应(ABR)反应阈对纯音听阈的预估;研究短纯音及两种不同强度切迹噪声掩蔽短纯音诱发的ABR(分别命名为tb-ABR、amtb-ABR和bmtb-ABR)的波形特点及差异。方法对20例(40耳)耳科正常人行纯音测听,并记录短纯音ABR和两种不同强度切迹噪声掩蔽短纯音诱发的ABR,对结果进行分析比较。结果①相同频率tb-ABR、amtb-ABR、bmtb-ABR的反应阈接近,无统计学差异。②各频率tb-ABR、amtb-ABR、bmtb-ABR反应阈与相应频率纯音听阈之差的平均值均在15 dB以内。在相同频率,三种测试方法所得的反应阈与纯音听阈之差的平均值接近,无统计学差异。③在相同刺激强度,无论采用哪种测试方法,波V潜伏期均随频率升高而缩短。当刺激强度和频率相同时,波V潜伏期均表现为tb-ABR最短,amtb-ABR次之,bmtb-ABR最长,差异具有统计学意义。结论短纯音及同侧切迹噪声掩蔽短纯音诱发的ABR的反应阈均可用于预估纯音听阈。
关键词
短纯音;切迹噪声;听性脑干反应;纯音听阈
基金项目(Foundation):
科技部“十一·五”支撑项目(2007BAI18B12)
作者
邹琦娟;倪道凤;李奉蓉;徐春晓;商莹莹;张志勇;
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