The volume of air within the LUNGS changes with the respiratory cycle (see RESPIRATION). The volumes defined below can be measured, and may be useful indicators of pulmonary disease.
Normal values for a 60 kg man are:
ml | |
TLC | 5,000–6,000 |
TV | 400–600 |
IRV | 3,300–3,750 |
ERV | 950–1,200 |
IRV | 1,200–1,700 |
VC | 3,400–4,800 |
FRC | 2,300–2,600 |
The volume of air that can be held in the lungs at maximum inspiration.
The volume of air taken into and expelled from the lungs with each breath.
The volume of air that can still be inspired at the end of a normal quiet inspiration.
The volume of air that can still be expired at the end of a normal quiet expiration.
The volume of air remaining in the lungs after a maximal expiration.
The maximum amount of air that can be expired after a maximal inspiration.
The volume of air left in the lungs at the end of a normal quiet expiration.