title: [Regional perfusion and ventilation studies with continuous infusion of krypton-81m].
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007263:Infusions, Parenteral; D007726:Krypton / Q000008:administration & dosage; D008168:Lung / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D011652:Pulmonary Circulation; D011868:Radioisotopes / Q000008:administration & dosage; D014692:Ventilation-Perfusion Ratio
chemical_list: D011868:Radioisotopes; D007726:Krypton