To Measure Forced Vital Capacity (FVC) and Forced Expiratory Volume

Question

To measure forced vital capacity (FVC) and forced expiratory volume (FEVT), the subject should .
A) take a deep inspiration, then rapidly and forcefully exhale as much air as possible
B) take a deep inspiration, then calmly and carefully exhale as much air as possible
C) exhale as much air as possible, then inhale as much air as possible

Accepted Answer

To measure forced vital capacity (FVC) and forced expiratory volume (FEV), the subject needs to take a deep inspiration and then rapidly and forcefully exhale as much air as possible. This method is used to assess the amount of air a person can expel from their lungs and how quickly they can do it, which are critical parameters in respiratory function testing.