| PACO2 | partial pressure of carbon dioxide in alveolar gas |
|---|---|
| PaCO2 | partial pressure of carbon dioxide in arterial blood |
| PAIS | partial androgen insensitivity syndrome; phosphoribosylaminoimidazole synthetase; psychosocial adjus... |
| PAO2 | alveolar oxygen partial pressure |
| PAPVC | partial anomalous pulmonary venous connection |