健听青年短音ABR和倍频程CE-Chirp ABR的V波特性分析

A Comparison of the Wave V between Tone-pip and Octave Band CE-Chirp Evoked Auditory Brainstem Responses in Normal-hearing Young People

目的观察健听青年人短音ABR和倍频程CE—Chirp ABR的V波潜伏期和振幅差异，探讨倍频程CE—Chirp ABR的临床应用价值。方法选择听力正常青年人20例，分别行双耳短音ABR和倍频程CE-Chirp ABR测试，记录V波潜伏期和振幅，并用析因设计方法进行统计。结果在20、40、60、80dB nHL刺激强度下，倍频程CE-Chirp ABR的V波潜伏期明显缩短，与短音ABR相比具有统计学差异（P〈0．05）；在20、40、60dB nHL刺激强度下，倍频程CE-Chirp ABR的V波振幅明显高于短音ABR，差异具有统计学意义（P〈0．05），而在80dB nHL刺激强度下两者V波振幅无统计学差异（P〉0．05）。结论听力正常青年人倍频程CE-Chirp ABRV波潜伏期短于短音ABR，且倍频程CE-Chirp ABR中低刺激强度下V波振幅明显高于短音ABR，更有利于V波判断，但其V波潜伏期的规律性较短音ABR差，在不同个体间差异较大。

Obloctivo To compare the difference in wave V latencies and amplitudes between tone-pip ABR and octave band CE-Cbirp~ ABR in normal-hearing young people and to investigate the clinical value of octave band CE-Chirp ABR. Methods Twenty young adults with normal hearing received tone-pip ABR and octave band CE-Chirp ABR tests. The wave V latencies and amplitudes were recorded and the factorial design methods were used to analyze the data. Results Wave V latencies of octave band CE-Chirp ABR were significantly shorter than those of tone-pip ABR（P〈0.05） at 20,40,60 and 80 dB nHL of stimulus.The wave V amplitudes of octave band CE-Chirp ABR were greater than those of tone-pip ABR （P〈0.01） at low and moderate intensity（20, 40, 60 dB nHL）, but there was no significant difference at high intensity （80 dB nHL）（P〉0.05）. Conclusion In normal-hearing young people, the wave V latencies of octave band CE-Chirp ABR are shorter than tone-pip ABR, and octave band CE-Chirp ABR is more helpful for clinical judgment of wave V at low and moderate intensity level. However, the changes of wave V latencies of octave band CE-Chirp is more irregular and shows greater individual differences than ABR.