A healthy adult individual undergoes a pulmonary function test. The following respiratory values are recorded: Total Lung Capacity (TLC) = 5800 mL Residual Volume (RV) = 1200 mL Inspiratory Capacity (IC) = 3500 mL Based on the given data, what is the value of the Expiratory Reserve Volume (ERV) for this individual?

Step-by-step solution

Total Lung Capacity (TLC) is the total volume of air accommodated in the lungs at the end of a forced inspiration. It is the sum of Inspiratory Reserve Volume (IRV), Tidal Volume (TV), Expiratory Reserve Volume (ERV), and Residual Volume (RV). Since Inspiratory Capacity (IC) is the sum of IRV and TV, the formula for TLC can be written as: TLC = IC + ERV + RV Given: TLC = 5800 mL IC = 3500 mL RV = 1200 mL Substituting the values: 5800 = 3500 + ERV + 1200 5800 = 4700 + ERV ERV = 5800 - 4700 = 1100 mL Calculating TLC