Respiratory Volumes

500mL

Tidal Volume (TV) value

Tidal Volume

amount of air inhaled and exhaled in one cycle during quiet breathing.

3000mL

Inspiratory Reserve Volume (IRV) value

Inspiratory reserve volume

amount of air excess of tidal volume that can be inhaled with maximum effort

1200mL

Expiratory reserve volume (ERV) value

Expiratory reserve volume (ERV)

Amount of air in excess tidal volume that can be exhaled with maximum effort

1300mL

Residual volume (RV) value

Residual volume (RV)

amount of air remaining in the lungs after maximum expiration; the amount that can never be voluntarily exhaled

Vital Capacity (VC)

the amount of air that can be inhaled and then exhaled with maximum effort; the deepest possible breath.

4700mL

Vital Capacity (VC) value

ERV+TV+IRV

Vital Capacity formula

Inspiratory Capacity (IC)

Maximum amount of air that can be inhaled after a normal tidal expiration

3500 mL

Inspiratory Capacity (IC) value

TV+IRV=IC

Inspiratory Capacity (IC) formula

Functional residual capacity (FRC)

amount of air remaining in the lungs after a normal tidal expiration

2500mL

Functional residual capacity (FRC) value

RV+VC=TLC

Functional residual capacity (FRC) formula

Total lung capacity

Maximum amount of air the lungs can contain

6000mL

Total lung capacity volume

RV+VC=TLC

Total lung capacity formula