FEV1 tutorial

The FEV1 represents the Forced Expiratory Volume in the first second of a maximal velocity VC manoeuvre. The volume of air that can be forced out in one second from total lung capacity (full breath of air) is an important measure of pulmonary function. Another useful way of expressing FEV1 is as a percentage of FVC (i.e., FEV1/FVC × 100), which corrects…

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