| PNa | plasma sodium |
|---|---|
| PSP | pancreatic spasmolytic peptide; paralytic shellfish poisoning; parathyroid secretory protein; period... |
| SAGM | sodium chloride, adenine, glucose, mannitol |
| SAS | sarcoma amplified sequence; self-rating anxiety scale; short arm splint; Sklar Aphasia Scale; sleep ... |
| SAT | saliva alcohol test; satellite; serum antitrypsin; single-agent chemotherapy; slide agglutination te... |