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Line 12: ==Helium Dilution== {{Main\|Helium dilution technique}} The helium dilution technique for measuring lung volumes uses a closed, rebreathing circuit.<ref>Hathirat S, Renzetti AD, Mitchell M: Measurement of the total lung capacity by helium dilution in a constant volume system, Am Rev Respir Dis 102:760, 1970.</ref> This technique is based on the assumptions that a known volume and concentration of helium in air begin in the closed [[spirometer]], that the patient has no helium in their lungs, and that an equilibration of helium can occur between the spirometer and the lungs.

Pulmonary function testing: Difference between revisions