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为确定气体成分对咽鼓管通气功能的影响，选用4只猴行压力反应及充放气试验。镇静后，显微镜下行左鼓膜切开，清醒后，外耳道内置鼓室测量塞使中耳与测量系统相互密闭，中耳内分别充入下列各种气体，每种10分钟。包括：①空气；②低氧气体（12％O2、88％N2）；③高氧气体（100
In order to determine the influence of gas composition on the eustachian tube ventilation function, 4 monkeys were selected for the pressure response and deflation test. After sedation, the left posterior eardrum was dissected under the microscope. After awake, the tympanometry plug was placed on the external auditory meatus to seal the middle ear and the measurement system. The middle ear was filled with the following gases for 10 minutes each. Including: ① air; ② low oxygen gas (12% O2, 88% N2); ③ high oxygen gas (100