因直接或间接的外力作用于鼓膜形成的创伤叫做鼓膜外伤。表现为鼓膜破裂，耳痛、听力减退、耳鸣，少量出血和耳内闷塞感。爆震伤还可使患者出现眩晕、恶心。
二、鼓膜外伤（traumatic injury of the rympanic membrane） 三、颞骨骨折（fracture of the temporal bone) .
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目的观察低功率氦—氖激光局部照射对鼓膜外伤的疗效。
Objective To observe the effect of he-ne laser irradiation on injured tympanum.
目的探讨外伤性鼓膜穿孔准确的诊断方法和最佳的治疗方法。
Objective to discuss the accurate diagnosis and the best restoration methods of the traumatic perforation of tympanic membrane.
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。
Methods ABR tests were evaluated in 30 traumatic perforation of tympanic membrane cases (30 ears) and compared with the results of pure tone audiometry.
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