Inspiratory reserve volume
Inspiratory Reserve Volume
Inspiratory reserve volume (IRV) is the maximum amount of additional air that can be drawn into the lungs by determined effort after normal inspiration. The average inspiratory reserve volume is about 3000 milliliters in males and 2100 milliliters in females.
Pronunciation
Inspiratory reserve volume is pronounced as /ɪnˈspaɪrətɔːri rɪˈzɜːrv ˈvɒljuːm/.
Etymology
The term "inspiratory reserve volume" is derived from the Latin "inspirare" meaning "to breathe in", "reservare" meaning "to keep back", and "volumen" meaning "a roll or scroll; a quantity or volume".
Related Terms
- Tidal Volume: The amount of air which enters the lungs during normal inhalation at rest.
- Expiratory Reserve Volume: The additional amount of air that can be expired from the lungs by determined effort after normal expiration.
- Residual Volume: The volume of air still remaining in the lungs after the most forcible expiration possible.
- Vital Capacity: The greatest volume of air that can be expelled from the lungs after taking the deepest possible breath.
- Total Lung Capacity: The volume in the lungs at maximal inflation, the sum of VC and RV.
See Also
External links
- Medical encyclopedia article on Inspiratory reserve volume
- Wikipedia's article - Inspiratory reserve volume
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