Given the following volumes what would the VC, TLC, and IC be? Tidal volume= 450, Inspiratory reserve volume= 2400, Expiratory reserve volume= 900, Residual volume= 1100. Calculate: VC=, TLC=, IC=

Answer

To find the lung capacities, we apply the standard physiological formulas using the provided volumes: 1) Vital Capacity (VC) is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is the sum of Tidal Volume (TV), Inspiratory Reserve Volume (IRV), and Expiratory Reserve Volume (ERV). VC = TV + IRV + ERV = 450 + 2400 + 900 = 3750. 2) Total Lung Capacity (TLC) is the volume of air contained in the lungs at the end of a maximal inspiration. It is the sum of all lung volumes, including the Residual Volume (RV). TLC = VC + RV = 3750 + 1100 = 4850. 3) Inspiratory Capacity (IC) is the maximum volume of air that can be inspired after reaching the end of a normal, quiet expiration. It is the sum of Tidal Volume and Inspiratory Reserve Volume. IC = TV + IRV = 450 + 2400 = 2850. Therefore, the results are VC = 3750, TLC = 4850, and IC = 2850.