| PRTH-C | prothrombin time control |
|---|---|
| PTFA | prothrombin time fixing agent |
| PTR | patellar tendon reflex; patient termination record; patient to return; peripheral total resistance; ... |
| PaO2 | partial oxygen tension in arterial blood; partial pressure of oxygen in arterial blood |
| PH | parathyroid hormone; partial hepatectomy; partial hysterectomy; passive hemagglutination; past histo... |