title: SIMPLE METHOD FOR DETERMINATION OF PERFUSION AND VENTILATION-PERFUSION RATIO OF THE UNDERVENTILATED ELEMENTS (THE SLOW COMPARTMENT) OF THE LUNG.
mesh_terms: D001784:Blood Gas Analysis; D002845:Chromatography; D006371:Helium; D006801:Humans; D009584:Nitrogen; D010100:Oxygen; D010477:Perfusion; D010827:Physiology; D011650:Pulmonary Alveoli; D011652:Pulmonary Circulation; D011656:Pulmonary Emphysema; D012119:Respiration; D014692:Ventilation-Perfusion Ratio
chemical_list: D006371:Helium; D009584:Nitrogen; D010100:Oxygen
keywords: BLOOD GAS ANALYSIS; CHROMATOGRAPHY; HELIUM; NITROGEN; OXYGEN; PERFUSION; PHYSIOLOGY; PULMONARY ALVEOLI; PULMONARY CIRCULATION; PULMONARY EMPHYSEMA; RESPIRATION