| Pa | pascal; pathologist, pathology; protactinium; Pseudomonas aeruginosa; pulmonary arterial [pressure] |
|---|---|
| PA | partial pressure of arterial fluid |
| PaCO2 | partial pressure of carbon dioxide in arterial blood |
| PACWP | pulmonary arterial capillary wedge pressure |
| PAOD | peripheral arterial occlusive disease; peripheral arteriosclerotic occlusive disease |