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; | ||
1. Tidal Volume<br>The volume of air inspired and expired over the course of a normal breath. This is around 500 mls | 1. Tidal Volume<br>The volume of air inspired and expired over the course of a normal breath. This is around 500 mls | ||
2. Inspiratory Reserve Volume<br>The volume of air that can be inspired over and above that of a normal (tidal volume) breath. This is around 3100 mls | 2. Inspiratory Reserve Volume<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<br>The Volume of air that can be expired over and above that of a normal breath. This is around 1200 mls | 3. Expiratory Reserve Volume<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<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. | 4. Residual volume<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> | ||
<references /> | |||
http://www.frca.co.uk/article.aspx?articleid=100023<br> | |||
Revision as of 12:44, 16 November 2010
There are several different measures of lung volumes, some of which can be taken by Spirometry. They are;
1. Tidal Volume
The volume of air inspired and expired over the course of a normal breath. This is around 500 mls
2. Inspiratory Reserve Volume
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
The Volume of air that can be expired over and above that of a normal breath. This is around 1200 mls
4. Residual volume
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.