外伤性鼓膜穿孔听性脑干反应结果分析

Analysis on auditory brainstem response of traumatic perforation of tympanic membrane

目的 探讨听性脑干反应 (ABR)检测在外伤性鼓膜穿孔听力的鉴定意义。方法 应用ABR方法对 30例 (30耳 )外伤性鼓膜穿孔进行测试 ,并将其结果与纯音电测听结果进行对照。结果 鼓膜小穿孔导致单纯传导性聋 ,ABR对鼓膜小穿孔不灵敏 ;鼓膜大穿孔导致混合性聋 ,对ABR灵敏度增高。结论ABR对鼓膜大穿孔所致的混合性聋或感音神经性聋表现灵敏。而ABR听阈测定在检测鼓膜小穿孔所引起的单纯传导性聋则需结合其他客观听阈测定。

Objective To explore the diagnostic significance of traumatic perforation of tympanic membrane with auditory brainstem response(ABR).Methods ABR tests were evaluated in 30 traumatic perforation of tympanic membrane cases(30 ears) and compared with the results of pure tone audiometry.Results Small perforation of tympanic membrane led to pure conductive deafness,and was not sensitive on ABR.Big perforation of tympanic membrane led to mixed deafness,the sensitivity increased on ABR.Conclusion Mixed deafness and sensorineural hearing loss caused by big perforation of tympanic membrane are sensitive on ABR.Therefore,it is necessary to use a combination of ABR and other hearing tests in small perforation of tympanic membrane examination.