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默沙东 诊疗手册

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The Eustachian Tube: Keeping Air Pressure Equal
The Eustachian Tube: Keeping Air Pressure Equal
The Eustachian Tube: Keeping Air Pressure Equal

外界空气通过咽鼓管进入中耳,以维持耳膜两侧的气压平衡。如果咽鼓管阻塞,空气不能进入中耳,中耳压力降低。中耳压力低于外耳道压力时,耳膜内陷。压差可能引起疼痛、血肿或鼓膜破裂。