Expansion
Volume, Air, Tidal, Inspiratory, Residual, Expiratory
Expansion
- TV - Tidal Volume (~500 mL): volume of a normal resting breath
- IRV - Inspiratory Reserve Volume (~3000 mL): maximum extra air inspired above TV
- ERV - Expiratory Reserve Volume (~1100 mL): maximum air forcibly expired after normal expiration
- RV - Residual Volume (~1200 mL): air remaining after maximum expiration; not measurable by spirometry
- IC - Inspiratory Capacity = TV + IRV
- FRC - Functional Residual Capacity = ERV + RV (volume at end of normal expiration)
- VC - Vital Capacity = TV + IRV + ERV
- TLC - Total Lung Capacity = VC + RV (~6000 mL in an average adult)