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本文报告2例声损伤引起的外淋巴瘘。例1为50岁女电话接线员,安装新机器时(左耳戴耳机)突然受到数秒的强声刺激,声强约130dB A。当时即感左耳高音调性耳鸣、耳聋伴平衡失调。听力图示左耳感音性聋伴重振。数月后听力继续下降,持续眩晕。左耳探查发现圆窗膜明显的外淋巴瘘。封闭瘘管后听力稳定,眩晕消失。例2为16岁女学生,右耳靠近播放迪斯科音乐的高音喇叭时突觉右耳聋、耳鸣及眩晕。次日晨耳鸣及眩晕消失,但仍耳聋。其后耳聋继续加重,起病6周后右耳感音性聋70～80dB伴重振、无声衰。鼓室探查开始未发现瘘管,但将患者放于头低倾斜位后即可见少量液体从圆窗膜漏出。用脂肪组织填充瘘管后,听力稳定于70～75dB。
This article reports 2 cases of acoustic injury caused by perilymph fistula. Example 1 is a 50-year-old female telephone operator. Suddenly, he received a strong acoustic stimulus for several seconds while setting up a new machine (headphones on the left) with a sound intensity of about 130dB. At that time, the left ear high pitched tinnitus, deafness with balance disorders. Hearing diagram left ear sensation deaf with vibration. Hearing continued to decline after several months, continued dizziness. Left ear exploration found round window membrane obvious lymphatic fistula. Closed fistula after hearing stable, dizziness disappeared. Example 2 is a 16-year-old female student with right deafness, tinnitus and dizziness when he is near the right ear near the tweeter playing disco music. Tinnitus and dizziness disappeared the next morning, but they were still deaf. Subsequently, deafness continued to worsen, 6 weeks after onset of right ear sensory deafness 70 ~ 80dB with re-vibration, silent failure. Tympanoscopy began to find no fistula, but the patient placed in the low head tilt position can be seen after a small amount of liquid leak from the round window membrane. After filling fistula with adipose tissue, the hearing is stable at 70 ~ 75dB.