Question

Calculate the ERV (Expiratory Reserve Volume) of an individual with the following respiratory volumes: TLC (Total Lung Capacity) = 6000 ml, FVC (Forced Vital Capacity) = 4800 ml, RV (Residual Volume) = 1200 ml, IRV (Inspiratory Reserve Volume) = 2900 ml, TV (Tidal Volume) = 500 ml.

Answer 1

The Expiratory Reserve Volume (ERV) is calculated by subtracting the sum of Tidal Volume (TV) and Inspiratory Reserve Volume (IRV) from Forced Vital Capacity (FVC). Given TV = 500 ml, IRV = 2900 ml, and FVC = 4800 ml, the ERV is 1400 ml.

Step-by-step explanation:

To calculate the Expiratory Reserve Volume (ERV) of an individual, we need to use the provided respiratory volumes and their relationships.

We are given the Total Lung Capacity (TLC) as 6000 ml, Forced Vital Capacity (FVC) as 4800 ml, Residual Volume (RV) as 1200 ml, Inspiratory Reserve Volume (IRV) as 2900 ml, and Tidal Volume (TV) as 500 ml.

The ERV can be calculated by subtracting the sum of TV and IRV from FVC:

1. First, add TV and IRV to find the amount of air inhaled during a normal breath and a deep inhalation.
   
   ERV = FVC - (IRV + TV)
2. Calculate the sum of IRV and TV: 2900 ml + 500 ml = 3400 ml.
3. Subtract this sum from the FVC: 4800 ml - 3400 ml = 1400 ml.

Therefore, the ERV of the individual is 1400 ml.