Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity.

Synonyms: Forced Expiratory Volumes Timed Vital Capacities Expiratory Volumes, Forced Capacities, Timed Vital Vital Capacities, Timed Volume, Forced Expiratory Expiratory Volume, Forced Vital Capacity, Timed Forced Expiratory Volume Timed Vital Capacity Capacity, Timed Vital FEVt Forced Vital Capacity, Timed Volumes, Forced Expiratory