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诊断可逆性气道阻塞(RAO)有时是困难的。通常确认的标准是,吸入支气管舒张剂后通气量获得改善;第1秒用力呼气量(FEV_1)≥15％;用力肺活量(FVC)≥15％;用力呼气中段流量(FEF_(25％～75％))≥20％。但有些高度疑似RAO的患者,用支气管舒张
Diagnosis of reversible airway obstruction (RAO) is sometimes difficult. The most commonly confirmed criteria are ventilatory gains after bronchodilator inhalation; forced expiratory volume in one second (FEV_1) ≥ 15%; forced vital capacity (FVC) ≥ 15%; forced expiratory flow (FEF_ (25% 75%)) ≥20%. However, some highly suspected RAO patients with bronchial dilation