正常青年人气骨导听性脑干反应的比较研究

Comparison Between Air-Conduct and Bone-Conduct Auditory Brainstem Responses in Normal Hearing Young Adults

目的 比较气、骨导听性脑干反应 (ABR)测试结果的差异 ,为骨导听性脑干反应的临床应用提供参考依据。方法 利用Nicoletspirit诱发电位仪、TDH - 39P和RadioearB - 71换能器 ,对一组听力正常青年人 (男 31耳 ,女 30耳 )进行短声气、骨导测试。结果 在阈值及阈上强度下 ,骨导ABR波形与气导类似 ,但各波引出率较气导低。听力正常青年男女之骨导短声ABR阈值间无差异 (P >0 .0 5 ) ;阈上 6 0dB短声刺激下Ⅰ、Ⅲ、Ⅴ波潜伏期及Ⅰ-Ⅴ波间期亦无差异 (P >0 .0 5 )。骨导短声ABR与气导短声ABR比较显示 :前者阈值高于后者 (P <0 .0 1) ,两者间呈显著的正相关 (r=0 .774 0 ) ;短声阈上 6 0dB强度刺激下 ,前者Ⅰ、Ⅲ、Ⅴ波潜伏期均大于后者 (P <0 .0 1) ,但两者Ⅰ -Ⅲ、Ⅲ -Ⅴ、Ⅰ -Ⅴ波间期无差异 (P >0 .0 5 )。结论 骨导听性脑干反应测试的应用具有一定的局限性 ,但对部份不适于气导ABR检测的患者 ,仍有其临床使用价值。

Objective To evaluate and compare the results of air-conduct and bone-conduct auditory brainstem response(ABR)for the purpose of clinical application of the bone-conduct ABR.Methods A group of normal hearing young adults(61 ears)were measured with click stimulation air-conduct ABR and bone-conduct ABR in a soundproof chamber.Results The waveforms of bone-conduct ABR were almost the same as those of air-conduct ones with the threshold of 26.08±7.71 dB(nHL),but with a lower rate of wave derivation.There were no significant differences between male and female for both air-conduct and bone-conduct ABR testing.The threshold for bone-conduct ABR was higher than that of air-conduct one with a very high positive correlation(r=0.7740)and there were significant differences (P<0.01) for the latencies of each wave between air-conduct and bone-conduct.But,there were no significant differences (P>0.05) for the wave intervals.Conclusion The limitation of the bone-conduct ABR application and the differences from air-conduct should be considered when it was used clinically.