title: Assessment of ventilation--perfusion inequalities by arterial--alveolar nitrogen differences in intensive-care patients.
mesh_terms: D002302:Cardiac Output; D006325:Heart Atria; D006352:Heart Ventricles; D006801:Humans; D007362:Intensive Care Units; D009584:Nitrogen / Q000097:blood; D010100:Oxygen / Q000097:blood; D011650:Pulmonary Alveoli; D001261:Pulmonary Atelectasis / Q000503:physiopathology; D012131:Respiratory Insufficiency / Q000503:physiopathology*; D014682:Vena Cava, Inferior; D014683:Vena Cava, Superior; D014692:Ventilation-Perfusion Ratio
chemical_list: D009584:Nitrogen; D010100:Oxygen