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目的 :探讨瞬态诱发耳声发射 (TEOAE)检测职业性听力损伤的可行性及临床应用价值。方法 :选择 90例 (180耳 )噪声暴露工人为实验总组 ,按噪声暴露时间长短又分为 1、2、3组 ;另选 11例 (2 2耳 )正常听力青年人作为对照组 ,行纯音听阈和TEOAE测试。结果 :各实验组纯音听阈值明显高于对照组 ,TEOAE总重复率、幅值和信噪比及各频段重复率、幅值和信噪比明显低于对照组 (P <0 .0 5或P <0 .0 1)。实验 1、2、3组间比较 ,随着噪声接触时间的增加 ,各频率点纯音听阈提高 ,TEOAE总重复率、幅值和信噪比及各频段重复率、幅值和信噪比变小 ,在 2 .5 0～ 3.5 0kHz和 3.5 0～ 4 .5 0kHz频段最明显。结论 :用TEOAE检测职业性听力损伤是可行的 ,有临床应用价值 ,最敏感频段为 2 .5 0～ 3.5 0kHz和 3.5 0～ 4 .5 0kHz频段。
Objective: To investigate the feasibility and clinical value of transient induced otoacoustic emission (TEOAE) in detecting occupational hearing impairment. Methods: Ninety (180 ears) noise exposed workers were selected as the experimental group, which were divided into 1, 2 and 3 groups according to the noise exposure time. Eleven (22 ears) normal hearing young people were selected as the control group. Pure tone threshold and TEOAE test. Results: The pure tone threshold of each experimental group was significantly higher than that of the control group. The total repetition rate, amplitude and signal-to-noise ratio and repeatability, amplitude and signal-to-noise ratio of TEOAE were significantly lower than those of the control group P <0 .0 1). Compared with the experimental groups 1, 2 and 3, with the increase of the noise exposure time, pure tone threshold of each frequency point increased, the total repetition rate, amplitude and signal-to-noise ratio of TEOAE and repetition rate, amplitude and signal- , The most obvious in the frequency band of 2.50 ~ 3.5 0kHz and 3.5 0 ~ 4. 0 0kHz. Conclusion: The detection of occupational hearing loss by TEOAE is feasible and has clinical value. The most sensitive frequency band is 2.500 ~ 3.500kHz and 3.5 0 ~ 4.500kHz.