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小气道是指在吸气情况下内径≤2mm非呼吸性细支气管:包括全部细支气管和终末细支气管以及部分内径较小的小支气管。小气道疾病是指发生在这些区域以阻塞性病变为特征的临床疾病,多数学者将其视为早期慢性阻塞性肺病(COPD)的同义语。
Small airway refers to the case of inspiratory diameter ≤ 2mm Non-respiratory bronchioles: including all the bronchioles and terminal bronchioles and some small diameter bronchioles. Small airway disease refers to the clinical disease that occurs in these areas as an obstructive disease, which most scholars consider as synonymous with early-stage chronic obstructive pulmonary disease (COPD).