Respiratory questions I need help understanding

Calculate inspiratory reserve using the equation: IRV = IC \(-\) TV.

Where:

Inspiratory capacity (IC) and subtract the individual's tidal volume (TV) from this amount. The result is the individual's inspiratory reserve (IRV).

An additional formula for calculating inspiratory reserve is: IRV = VC - (TV + ERV) or in other words inspiratory reserve volume equals vital capacity - (tidal volume plus expiratory reserve volume).


The ERV is the maximum amount of air that can be expelled from the lungs after a normal exhalation. The volume remaining in the lungs after a normal exhale is the functional residual capacity (FRC). The volume of air in the lungs that cannot be expelled is the residual volume, or RV. Therefore, ERV = FRC - RV.

Thank you very much for explaining these problems.

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