The most common parameters measured in spirometry are Vital capacity ( VC ), Forced vital capacity ( FVC ), Forced expiratory volume ( FEV ) at timed intervals of 0.5, 1.0 ( FEV1 ), 2.0, and 3.0 seconds, forced expiratory flow 25 75 % ( FEF 25 75 ) and maximal voluntary ventilation ( MVV ), also known as Maximum breathing capacity.
