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外淋巴瘘是外淋巴与中耳之间的异常通道。本文报告20例,男15例,女5例,年龄8月～15岁,平均8岁。经纯音、语言测听和脑干诱发电位检查,所有病例均有耳聋,其中进行性聋16例,全聋4例。并发眩晕8例,耳鸣5例,脑膜炎2例。所有病例均以蜗小管为中心作高分辨率 CT 扫描,可检查蜗小管三段;蜗旁段、中间段和近侧段,发现9例蜗小管正常,8例蜗小管扩张,11例蜗小管不对称。全部病例均行手术探查,在鼓室后上区剥离和切除皮瓣,暴露两窗区域直到匙突。看到下述现象者可确认为外淋巴瘘:吸引后仍不断有液体溢出,液体溢出所致的反光点变化,或颈静脉
Perilymph fistula is an abnormal channel between the perilymph and the middle ear. This article reports 20 cases, 15 males and 5 females, aged from August to 15 years, with an average of 8 years old. The pure tone, language audiometry and brainstem evoked potential test, all cases have deafness, including progressive deafness in 16 cases, 4 cases of total deafness. 8 cases of vertigo, tinnitus in 5 cases, 2 cases of meningitis. In all cases, high-resolution computed tomography (CT) scan was performed on the cochlear tube. Three sections of the cochlear tube were examined. In the cochlear, middle and proximal sections, nine cochlear tubules were normal, eight cases of cochlear tubules were dilated, and 11 cases of cochlear tubules Asymmetric. All patients underwent surgical exploration, in the tympanic area after the stripping and removal of the flap, the window area until the exposed key spike. See the following phenomenon can be identified as perilymph fistula: after the suction is still continued to overflow, liquid overflow caused by the reflective point change, or jugular vein