label: Decreased pre-bronchodilator forced expiratory flow 25-75%
label_lc: decreased pre-bronchodilator forced expiratory flow 25-75%
description: "A reduction compared to the predicted value of the forced expiratory flow over the middle one-half of the FVC; the average flow from the point at which 25% of the FVC has been exhaled to the point at which 75% of the FVC has been exhaled. Here, the test is performed before the administration of a bronchodilating medication."