Ace the CPFT Challenge 2025 – Breathe Easy with Pulmonary Success!

Total Lung Capacity (TLC) represents the maximum amount of air the lungs can hold after a maximum inhalation. It is the sum of several key lung volumes, which include Tidal Volume (TV), Inspiratory Reserve Volume (IRV), Expiratory Reserve Volume (ERV), and Residual Volume (RV).

Tidal Volume is the amount of air inhaled or exhaled during normal breathing. Inspiratory Reserve Volume is the extra volume of air that can be inhaled with maximum effort after a normal inhalation. Expiratory Reserve Volume is the volume of air that can be forcibly exhaled after the end of a normal expiration. Finally, Residual Volume is the volume of air that remains in the lungs after a forced exhalation and cannot be exhaled.

When these four volumes are combined, they comprise the total capacity of the lungs, thereby accurately reflecting the Total Lung Capacity (TLC). Other options mention groups of volumes that do not collectively equal TLC, which is why they do not represent the total lung capacity accurately.