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耳气压功能是指人体中耳腔对外界大气压发生变化的反应能力。中耳腔是一个相对密闭的气腔,主要依靠咽鼓管与外界相通,保持与外界空气压力的平衡。咽鼓管位于人体中耳腔内,是人耳鼓膜里面的一个小管道,开口于咽部,与鼻咽部相通。这是使中耳腔内的气压与外界大气压调节平衡的唯一通气管,全长约35～38毫米,内三分之二为软骨部,外三分之一为骨部。平时管腔内约有一立方厘米的空气。咽鼓管平时处于关闭状态,当吞咽、咀嚼、打呵欠或打喷嚏时,依靠该处的肌肉收缩使其开放,与外界相通,保持腔内外压力的平衡。如果由于某种原因使腔内外压力不平衡时,可导致管
Ear pressure function refers to the human ear cavity on the outside world atmospheric pressure response ability. The middle ear cavity is a relatively closed air cavity, mainly connected with the outside world by eustachian tube to maintain the balance of air pressure with the outside world. Eustachian tube is located in the human ear cavity, which is a small human tympanic membrane, opening in the pharynx, and nasopharyngeal interlinked. This is the only ventilation tube that balances the air pressure in the middle ear cavity with the outside atmospheric pressure. The total length is about 35-38 mm. The inner two thirds are the cartilaginous part and the outer one third is the bone. Usually about one cubic centimeter of lumen in the air. Eustachian tube usually closed, when swallowing, chewing, yawning or sneezing, relying on the Department of muscle contraction to open, with the outside world to maintain the balance of pressure inside and outside the cavity. If for some reason the pressure inside and outside the chamber is not balanced, can lead to the tube