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喘息性支气管炎仅系一临床概念,是指一组有哮喘表现的婴幼儿下呼吸道感染而言。由于乳幼儿气管、支气管比较狭小,易因感染或其他刺激而加重。另外,患儿有过敏体质因素,在上呼吸道感染后,引起小支气管痉挛或肿胀,而产生喘鸣。因此.有人认为本病患儿有一部分是婴儿期支气管哮喘(以下简称哮喘)或轻型哮喘。喘息性气管炎的发病机理与哮喘相似。哮喘的发病机理,近年来研究得较多.大致可有以下三方面。
Asthmatic bronchitis is only a clinical concept, refers to a group of asthmatic children with lower respiratory tract infection. As a result of infant tracheal, bronchial relatively narrow, easily aggravated by infection or other stimuli. In addition, children with allergic factors, in the upper respiratory tract infection, causing a small bronchial spasm or swelling, resulting in wheezing. Therefore, some people think that part of the children are infants with bronchial asthma (hereinafter referred to as asthma) or light asthma. The pathogenesis of asthmatic bronchitis is similar to asthma. The pathogenesis of asthma in recent years more studied in general can have the following three aspects.