采用Astograph方法对33例婴幼儿期患过毛细支气管炎(毛支)儿童及60例正常儿童进行乙酰甲胆碱吸入气道反应性测定。研究显示:毛支组气道高反应性的发生率为48.48％,明显高于对照组(10％)(P<0.01)。毛支组中有5例发展为哮喘,占15.15％,与对照组2例(3.33％)相比有显著差异(P<0.05)。本文探讨了毛细支气管炎、支气管哮喘及气道高反应性之间的关系。 Astograph was used to measure the airway responsiveness of methacholine inhalation in 33 infantile infants with bronchiolitis (bronchiolitis) and 60 normal children. The study showed that the incidence of airway hyperreactivity in the branch of the branch of hair was 48.48%, significantly higher than that of the control group (10%) (P <0.01). Five of the bronchial branches developed asthma, accounting for 15.15%, which was significantly different from the control group (3.33%) (P <0.05). This article explores the relationship between bronchiolitis, bronchial asthma and airway hyperresponsiveness.