Lung volumes: Difference between revisions
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There are several different measures of lung volumes, some of which can be taken by Spirometry. They are; | There are several different measures of lung volumes, some of which can be taken by Spirometry. They are; | ||
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1. Tidal Volume (TV)<br>The volume of air inspired and expired over the course of a normal breath. This is around 500 mls | |||
2. 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 mls | |||
3. 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 mls | |||
4. 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 mls but cannot be measured by spirometry.<br> | |||
4. Residual | |||
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Revision as of 12:45, 16 November 2010
There are several different measures of lung volumes, some of which can be taken by Spirometry. They are;
1. Tidal Volume (TV)
The volume of air inspired and expired over the course of a normal breath. This is around 500 mls
2. 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 mls
3. Expiratory Reserve Volume (ERV)
The Volume of air that can be expired over and above that of a normal breath. This is around 1200 mls
4. 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 mls but cannot be measured by spirometry.
References