A re-breathing method for determining pulmonary capillary blood flow that accounts for changes in the cardiac output or in the carbon dioxide content of the venous blood of a patient. The carbon dioxide elimination and partial pressure of end tidal carbon dioxide of the patient are non-invasively measured...http://www.google.fr/patents/US6210342?utm_source=gb-gplus-shareBrevet US6210342 - Bi-directional partial re-breathing method
