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一般认为咽鼓管对中耳病变的发生有重要作用,但关于鼓室负压的意义却有不同的看法。负压引起中耳渗液的学说是Politzer于1867年提出,习惯认为咽鼓管阻塞时,鼓室内的气体被粘膜吸收,形成负压而导致渗液。近来一些作者认为中耳负压不一定有致病作用。动物实验观察,咽鼓管阻塞引起的中耳负压最大可达1KPa(1000帕斯卡约为100mm水柱)。但临床观察到的中耳负压比这要高得多,似乎难以用咽鼓管阻塞气体被吸收来解释。因此,尚不能断定中耳渗液究系由负压引起抑或由于炎症使分泌物增多或咽鼓管引流受阻所致。看作这些因素的综合作用,似较合理。但对鼓压测量所遇到的高负压情况,应如
Eustachian tube is generally believed that the incidence of middle ear lesions have an important role, but the significance of tympanic negative pressure have different views. Negative pressure caused by the theory of the middle ear effusion is Politzer proposed in 1867, accustomed to eustachian tube obstruction, the tympanum gas is mucosal absorption, resulting in negative pressure and cause exudate. Recently, some authors believe that negative pressure in the middle ear may not have a pathogenic role. Animal experiments, Eustachian tube obstruction caused by the ear vacuum up to 1KPa (1000 Pascal about 100mm water column). However, clinically observed negative pressure in the middle ear is much higher than this, it seems difficult to use the eustachian tube blocking gas is absorbed to explain. Therefore, it can not be concluded that the middle ear exudate caused by negative pressure or inflammation due to increased secretions or eustachian tube drainage due to obstruction. As a comprehensive effect of these factors, it seems more reasonable. However, the drum pressure measurement encountered high negative pressure should be