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closed-system helium dilution method |
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closed-system helium dilution method, a technique for measuring functional residual capacity and residual volume. It is based on the principle that if a known volume and concentration of helium are added to a patient's respiratory system, the helium will be diluted in proportion to the lung volume to which it is added. Helium, an inert gas, is not significantly absorbed from the lungs by the blood. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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