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氧化亚氮和氧气全麻期间中耳压增加,并可能是引起暂时的或永久的听力损害、鼓室积血、镫骨断裂、鼓膜破裂、严重耳炎和移植鼓膜移位等许多并发症的主要原因。作者报道1例氧化亚氮全麻引起鼓膜破裂。此例为一46岁妇女,幼儿时两耳常流液,因患肾萎缩引起的高血压,拟行右肾切除术。术前主诉听力丧失,偶有耳鸣和遇冷有痛感。按其年龄,当频率为125Hz～8000Hz 时,听力应属正常范围。左耳用阻抗电桥测中耳压,试用两种频率(200Hz和660Hz),出现高幅鼓室压力图,用易感的660
Increased middle ear pressure during general anesthesia with nitrous oxide and oxygen may be the major contributor to many complications, such as temporary or permanent hearing loss, tympanic hemorrhage, tarsal rupture, rupture of the tympanic membrane, severe otitis media and transposition of the tympanic membrane the reason. The authors report a case of nitrous oxide general anesthesia caused tympanic membrane rupture. This case is a 46-year-old woman, her ear often fluid, due to renal atrophy caused by hypertension, to be planned right nephrectomy. Preoperative chief complaint of hearing loss, occasional tinnitus and cold pain. According to their age, when the frequency of 125Hz ~ 8000Hz, hearing should be within the normal range. Middle ear pressure was measured with an impedance bridge on the left ear, two high frequency trials (200 Hz and 660 Hz) were performed, and a high amplitude tympanic pressure diagram was presented. The susceptible 660