测定FVC需要测试者尽力呼出肺内气体,这一过程约需20s,老年人或有严重肺疾病患者的体力常不堪耐受。常规的FVC测定值也会因气道阻塞者或健康高龄人的呼气时间而受影响。作者使用6s内用力呼气量(FEV_(6.0))代替FVC作为肺功能指标,探讨其对诊断气道阻塞和呼吸受限的优越性。 The determination of FVC requires testers to exhale the lungs as much as possible. This process takes about 20 seconds and is often unbearable for the elderly or those with severe lung diseases. Conventional FVC measurements will also be affected by expiratory time of airway obstruction or healthy elderly. The author used forced expiratory volume in 6s (FEV_ (6.0)) instead of FVC as a pulmonary function index to explore its superiority in the diagnosis of airway obstruction and respiratory restriction.