(Spirometry before and after bronchodilators)
Forced expiratory vital capacity (FVC), forced inspiratory vital capacity (VIVC), expiratory flow rates at specific percentage of expired vital capacity (eg, FEF 25 %, FEF 50 %, FEF 75%), inspiratory flow rates at specific percentage of FEC vital (FIF25%, FIF 50 %, FIF 75 %), peak flow rates during expiration and inspiration (PEFR, PIFR). Ration of expiratory and inspiratory flow rates at 50 % of vital capacity (FEF 50 % / FIF 50 %) expressed as a percent, and a graphic presentation of the maneuver showing expiratory and inspiratory flow plotted against volume.
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