"The force per unit area attributable to the oxygen, the chemical element with atomic number 8 which is the essential agent in the respiration of plants and animals, dissolved in a specified volume of blood."^^ . "PO2"^^ . "2010-12-13T03:58:25Z"^^ . . "mshimoyama"^^ . "CMO:0000381"^^ . . "partial pressure of blood oxygen"^^ . "clinical_measurement_ontology"^^ . .