| PNPR | positive-negative pressure respiration |
|---|---|
| pos | position; positive |
| PPB | platelet-poor blood; pneumococcal pneumonia and bacteremia; positive pressure breathing |
| PSP | pancreatic spasmolytic peptide; paralytic shellfish poisoning; parathyroid secretory protein; period... |
| PSW | primary surgical ward; positive sharp wave; psychiatric social worker |