淹溺
是被液体介质淹没并造成原发性呼吸功能受损的过程。因大气道内存在液体空气界面,导致病人无法呼吸。淹溺可分为:①湿性淹溺:喉部肌内松弛,吸入大量水分(22ml/kg)。充塞呼吸道和肺泡后发生窒息:湿性淹溺占淹溺者的90%;②干性淹溺:喉痉挛导致窒息,呼吸道和肺泡很少或无水吸入,约占淹溺者的10%。
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