听力正常儿童chirp声与click声听性脑干反应特征比较

Clinical Features Comparison of Auditory Brainstem Response by Chirp and Click Stimuli in Normal Hearing Children

目的比较听力正常儿童chirp声与click声听性脑干反应的特征。方法选择97例(194耳)听力正常儿童,分别采用CE-chirp和click刺激声进行ABR检测,比较两种ABR波形辨认率,波Ⅲ、V潜伏期,波V反应阈及不同刺激声强度下波V的振幅及检测时间。结果 chirp-ABR波Ⅰ辨认率(36%)明显低于click-ABR(100%),chirp-ABR与click-ABR波V反应阈值差异无统计学意义(P>0.05),在刺激声强度为80dB nHL时,chirp-ABR波Ⅲ、V潜伏期比click-ABR短,差异有统计学意义(P<0.05),且两种刺激声ABR波V振幅差异无统计学意义(P>0.05);在刺激声强度为50dB nHL时,chirp-ABR波V振幅较click-ABR明显增大,差异有统计学意义(P<0.05);在刺激声强度分别为80、50dB nHL时,chirp-ABR波V振幅差异无统计学意义(P>0.05);chirp-ABR较click-ABR检测时间短,差异有统计学意义(P<0.05)。结论与click-ABR相比,chirpABR的反应幅度高,潜伏期短,检测时间短,用于儿童听力检测具有明显优势。

Objective To study the characteristics of auditory brainstem response by chirp and click stimuli in normal hearing children.Methods A total of 97 children （194 ears）with normal hearing were recruited,including 50 male （100 ears）,and 47 female （94 ears）.The CE-chirp and the click acoustic stimulation were used to,and the ABR waveforms and latencies were obtained.ResuIts The chirp-ABR Ⅰ wave recognition rate （36%）was significantly lower than that of click-ABR （100%）.At 80 dB nHL,chirp-ABR V wave latency was shorter than click-ABR,the difference was statistically significant （P〈 0.05 ）.The chirp and click ABR V wave response thresholds showed no significant difference （P〉0.05）.At 80 dB nHL,no statistical significance of two kinds of a-coustic stimulation of ABR V wave amplitude difference （P〉0.05）.At 50 dB nHL,chirp-ABR significantly in-creased than click-ABR V wave amplitude with statistically significant differences （P〈0.05）.At 80,and 50 dB nHL,chirp-ABR showed no differences in the amplitude of V wave （P〉0.05 ）.ConcIusion The chirp acoustic stimulation produced the larger response amplitude,and was faster,demonstrating the noticeable advantages to tes-ting children.