Small airway is the most vulnerable area of respiratory diseases.In view of the particularity of small airways and the clinical impact of small airway diseases,small airway diseases should not be underestimated or ignored in the diagnosis and treatment of respiratory diseases.This article reviews the research status of small airway lesions on the pathogenesis,pathophysiological changes and effects on disease progression of chronic obstructive pulmonary disease,cough variant asthma,bronchial asthma,interstitial lung disease and other diseases,in order to increase the understanding of small airway lesions by respiratory doctors and provide new ideas for the diagnosis and treatment of respiratory diseases.
Small airway diseasesCOPDBronchial asthmaInterstitial lung disease