The forced expiratory volume in one second (FEV1) was measured before and after inhalation.

测定所有患者用药前后第1秒用力呼气量（FEV1）变化。

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Pulmonary function tests(PFT), including forced vital capacity(FVC), forced the first second of expiratory volume (FEV1) and FEV1/FVC.

肺功能检查结果。 包括用力肺活量（FVC），第一秒时间肺活量（FEV1）和一秒率（FEV1／FVC）等。

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First second forced expiratory volume accounts for the percentage of FVC (FEV1%).

第一秒用力呼气量占用力肺活量的百分率(FEV1 %)。

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