Simmons等的动物实验研究表明,单纯圆窗膜破裂不能产生重度感音性聋。作者1979～1984年对27例可疑外淋巳瘘病人行鼓室探查术全都证实有瘘孔存在,其中3例见到破裂的内耳窗有气泡状外淋巴液流出。封闭瘘孔术后眩晕改善,但听力恢复慢。乃在此基础上,对外淋巴腔内的气泡进行动物实验研究。实验一:用豚鼠16只,分三组。腹腔内注射戊巴比妥钠及局部利多卡因麻醉后暴露听泡。用金钢石钻开两个 Animal experiments such as Simmons and other studies have shown that the rupture of a simple round window membrane can not produce severe sensorineural hearing loss. From 1979 to 1984, 27 cases of suspected extra-levator fistula patients underwent tympanoscopy were confirmed fistula holes exist, of which 3 cases of ruptured inner ear window bubbly effusion. Dizziness improved after closed fistula, but hearing was slow to recover. On this basis, animal experiments were conducted on the air bubbles in the external lymphatic space. Experiment 1: Guinea pig 16, divided into three groups. Intraperitoneal injection of pentobarbital sodium and local lidocaine anesthesia after exposure to listen to the bubble. Drill two with diamonds