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哮喘

ID: ANH12078chis
哮喘是一种肺部疾病,会导致呼吸道发炎和变窄。正常情况下,当吸气时,空气会在气管中自由流动,然后通过大的管道,称为支气管,小的管道,称为细支气管,最后进入小的囊,称为肺泡。小血管,称为毛细血管,包围着肺泡。呼吸的空气中的氧气进入毛细血管。然后,身体中的二氧化碳从毛细血管进入肺泡,这样当你呼气时,肺就可以排出二氧化碳。当空气温暖、潮湿、没有刺激物和引起过敏的物质(过敏原)时,细支气管会扩张。当空气寒冷或干燥,或含有刺激物或过敏原时,支气管会收缩。如果你有哮喘,呼吸道经常发炎和肿胀。某些物质会导致你发炎的呼吸道反应过度,导致哮喘发作。每个人哮喘发作的诱因略有不同,但通常包括户外刺激物和过敏原,如花粉、烟雾、污染和寒冷的天气;室内刺激物和过敏原,如霉菌、宠物皮屑、尘螨和蟑螂粪便;食物过敏原,如鱼,贝类,鸡蛋,花生和大豆;以及呼吸道感染、压力、强烈的情绪和锻炼等情况。哮喘发作的症状包括咳嗽、喘息、呼吸短促和胸闷。哮喘发作时,也被称为支气管痉挛,呼吸道周围的肌肉收紧,气道壁变得更加肿胀。呼吸道也会产生黏稠的黏液,使它们更加狭窄,使你呼吸困难。如果你有哮喘,医生可能会开一些药物来减少呼吸道炎症、呼吸道周围肌肉收缩或呼吸道黏液分泌。在哮喘发作期间,你可能需要使用一种短效补救药物,称为支气管扩张剂。这种药物能使气道肌肉迅速放松,并在几分钟内缓解症状。由于哮喘没有治愈方法,我们的目标是通过使用长效、消炎控制药物来防止哮喘发作。如果你每天服用,这些药物将减少你的呼吸道炎症,使它们对哮喘发作的诱因不那么敏感。

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