Lung volumes: Difference between revisions
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#Inspiratory Reserve Volume (IRV)<br>The volume of air that can be inspired over and above that of a normal (tidal volume) breath. This is around 3100 ml | #Inspiratory Reserve Volume (IRV)<br>The volume of air that can be inspired over and above that of a normal (tidal volume) breath. This is around 3100 ml | ||
#Expiratory Reserve Volume (ERV)<br>The Volume of air that can be expired over and above that of a normal breath. This is around 1200 ml | #Expiratory Reserve Volume (ERV)<br>The Volume of air that can be expired over and above that of a normal breath. This is around 1200 ml | ||
#Residual Volume (RV)<br>The volume of air that is left in the lungs after maximal expiration; that is after the expiratory reserve volume. It is around 1200 ml but cannot be measured by spirometry. | #Residual Volume (RV)<br>The volume of air that is left in the lungs after maximal expiration; that is after the expiratory reserve volume. It is around 1200 ml but cannot be measured by spirometry. | ||
#Inspiratory Capasity (IC) | |||
The volume of maximal inspiration: IRV+TV | |||
6. Functional residual capasity (FRC) | |||
The volume of gas remaining in the lung after normal expiration: ERV+RV | |||
7. Vital capasity (VC) | |||
Volume of maximal inspiration and expiration: IRV+ERV+TV | |||
8. Total lung capasity (TLC) | |||
The volume of the lung after maximal inspiration: sum of all four lung volumes, IC+FRC | |||
=== References === | === References === | ||
<references /><br> | <references /><br> | ||
Revision as of 14:12, 25 October 2013
There are several different measures of lung volumes, some of which can be taken by Spirometry [1]. They are:
- Tidal Volume (TV)
The volume of air inspired and expired over the course of a normal breath. This is around 500 ml - Inspiratory Reserve Volume (IRV)
The volume of air that can be inspired over and above that of a normal (tidal volume) breath. This is around 3100 ml - Expiratory Reserve Volume (ERV)
The Volume of air that can be expired over and above that of a normal breath. This is around 1200 ml - Residual Volume (RV)
The volume of air that is left in the lungs after maximal expiration; that is after the expiratory reserve volume. It is around 1200 ml but cannot be measured by spirometry. - Inspiratory Capasity (IC)
The volume of maximal inspiration: IRV+TV
6. Functional residual capasity (FRC)
The volume of gas remaining in the lung after normal expiration: ERV+RV
7. Vital capasity (VC)
Volume of maximal inspiration and expiration: IRV+ERV+TV
8. Total lung capasity (TLC)
The volume of the lung after maximal inspiration: sum of all four lung volumes, IC+FRC