title: Arterial-alveolar oxygen partial pressure ratio: a theoretical reappraisal.
abstract: The relationship between the arterial-alveolar oxygen partial pressure ratio (PaO2/PAO2) and different fractions of inspired oxygen (FIO2) was studied using a bicompartmental computer model. PaO2/PAO2 was found to be less stable than in previous clinical works probably because the venous admixture varied with changes in the FIO2.
mesh_terms: D001794:Blood Pressure; D006801:Humans; D010100:Oxygen / Q000502:physiology*; D011650:Pulmonary Alveoli / Q000502:physiology; D011651:Pulmonary Artery / Q000502:physiology
chemical_list: D010100:Oxygen