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Pulmonary Volumes

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Pulmonary Volumes

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    1. 22 March 2010 Resp-Volumes.ppt 1 Pulmonary Volumes Measured with spirometer Inverted “bell” in double walled cylinder Water fills space between double walls Hose connects subject to volume of bell

    2. 22 March 2010 Resp-Volumes.ppt 2 Pulmonary Volumes Tidal volume Volume (ml) of air moved in one breath Rest = 500 ml (0.5 L) After exercise = 2 – 3 L Inspiratory reserve volume Expiratory reserve volume Residual volume

    3. 22 March 2010 Resp-Volumes.ppt 3 Pulmonary Capacities “Capacities” are sums of volumes. Vital capacity = TV + IRV + ERV Total Lung Capacity = Vital capacity + Residual volume

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