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热词榜

为什么儿童比成人更易患急性中耳炎?

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问:为什么儿童比成人更易患急性中耳炎
答:

?#20160;?a title="医学百科:感染" href="/ganran_107291/" rel="summary">感染时,细菌可经咽鼓管波及到中耳,引起中耳炎[1]。由于小儿的咽鼓管较短而宽,且略呈水平位,故儿童患急性中耳炎远较成人为多[1]

咽鼓管咽口(pharyngeal opening of auditory tube)位于鼻咽?#24247;?#20004;侧壁上,在下鼻甲后方约1cm处,各有一个,?#26159;?#32463;此口通过咽鼓管与中耳的鼓室相通[1]。咽鼓管咽口平时是关闭的,当吞咽或用力张口时,空气通过咽鼓管进入鼓室,以维持鼓膜两侧的气压平衡[1][2]

参?#30002;?#26009;

  1. ^ [1] 柏树令,应大君主编.系统解剖学.—8版[M].北京:人民卫生出版社,2013:107.
  2. ^ [2] 邱树华、刘国隆主编.解剖生理学[M].上海:上海科学技术出版社,1986:62.

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