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传导性耳聋(传音性耳聋):外耳或中耳的病变妨碍声波传入内耳,引起听力下降叫传导性耳聋。病因有二:(一)外耳疾病。如先天性外耳道闭锁,鼓膜发育不全;外耳道机械性阻塞:外耳道炎性肿胀。(二)中耳疾病。如听骨缺损或先天性畸形;中耳外伤;中耳炎症;中耳肿瘤等。防治方法有三:(一)如外耳和中耳畸形,可作手术,重造外耳道或鼓膜,建立传音机构。(二)积极治疗急性中耳炎。(三)对耳硬化症,可用手术治疗,改进听力。
Conductive deafness (acoustic deafness): Lesions in the outer ear or middle ear prevent sound waves from reaching the inner ear, causing hearing loss called conductive deafness. There are two causes: (a) external ear disease. Such as congenital external auditory canal atresia, tympanic membrane hypoplasia; external auditory canal mechanical obstruction: external ear canal inflammatory swelling. (B) middle ear disease. Such as bone defects or congenital malformations; middle ear trauma; otitis media; middle ear tumors. There are three methods of prevention and treatment (a) such as the outer ear and middle ear deformity, surgery, reconstruction of the external auditory canal or tympanic membrane, the establishment of sound agencies. (B) active treatment of acute otitis media. (C) of otosclerosis, surgical treatment available to improve hearing.