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首页> 外文期刊>The Laryngoscope: A Medical Journal for Clinical and Research Contributions in Otolaryngology, Head and Neck Medicine and Surgery, Facial Plastic and Reconstructive Surgery .. >Otoacoustic emissions and persistent tinnitus after acute acoustic trauma.
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Otoacoustic emissions and persistent tinnitus after acute acoustic trauma.

机译：急性声创伤后耳声发射和持续性耳鸣。

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摘要

OBJECTIVES: To follow up the auditory status of military personnel after an acute acoustic trauma and to identify the possible predictive value of hearing thresholds and otoacoustic emissions during the first 24 hours after the acoustic trauma. STUDY DESIGN: A group of 24 young military subjects, aged 22 +/- 2.3 years, without any otologic problem before the acoustic trauma, were examined at three time intervals after an accidental acoustic trauma caused by the discharge of a firearm: 24 hours, 72 hours, and 15 days. METHODS: Each subject was submitted to medical examination and to a questionnaire detailing the circumstances of the acoustic trauma. Pure tone audiometry was performed from 1 to 8 kHz per half octave. Transiently evoked otoacoustic emissions were recorded in the nonlinear mode at 80 dB pSPL, and distortion product otoacoustic emissions were recorded from 1 to 6 kHz, using a distortion product-gram type procedure, at 65/55 dB SPL, with f2/f1 = 1.22. Two groups of subjects were defined: group 1 (n = 8) represented subjects with short-lasting tinnitus (<72 h) and group 2 (n = 16) subjects with long-lasting tinnitus (>72 h). RESULTS: Hearing thresholds did not differ significantly between these two groups 24 hours after the acoustic trauma. However, otoacoustic emissions showed significantly lower amplitudes 24 hours after the acoustic trauma in subjects showing a longer lasting tinnitus. CONCLUSION: Otoacoustic emissions appear to be a better predictor of the persistence of tinnitus than hearing thresholds alone 24 hours after an acute acoustic trauma.
机译：目的：追踪急性声损伤后军事人员的听觉状态，并确定声损伤后最初24小时内听力阈值和耳声发射的可能预测值。研究设计：一组24名年轻的军人，年龄22 +/- 2.3岁，在听觉外伤之前没有任何耳科问题，在因枪支放电引起的意外听觉外伤后的三个时间间隔进行了检查： 72小时15天。方法：每个受试者都接受了医学检查，并接受了详细描述声损伤情况的问卷。每半个八度从1到8 kHz进行纯音测听。在80 dB pSPL的非线性模式下记录瞬态诱发的耳声发射，并使用畸变乘积克类型程序在65/55 dB SPL下记录1至6 kHz的失真产物耳声发射，f2 / f1 = 1.22 。定义了两组受试者：第1组（n = 8）代表短时耳鸣（<72 h）的受试者和第2组（n = 16）长耳鸣（> 72 h）的受试者。结果：两组在听觉创伤后24小时的听力阈值无显着差异。但是，在听觉创伤后24小时内，耳声发射显示出明显较低的振幅，受试者的耳鸣持续时间更长。结论：相比于在急性声创伤后24小时单独听阈，耳声发射似乎是耳鸣持续性的更好预测指标。

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