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 <ref>http://www.frca.co.uk/article.aspx?articleid=100023</ref>. They are: | ||
#Tidal Volume (TV)<br>The volume of air inspired and expired over the course of a normal breath. This is around 500 ml | #Tidal Volume (TV)<br>The volume of air inspired and expired over the course of a normal breath. This is around 500 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 | #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.<br> | #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.<br> | ||
=== References === | === References === | ||
<references /> | <references /><br> | ||
Revision as of 16:35, 16 November 2010
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.