| MBF | medullary blood flow; muscle blood flow; myocardial blood flow |
|---|---|
| PBF | peripheral blod flow; placental blood flow; pulmonary blood flow |
| PIP | paralytic infantile paralysis; peak inflation pressure, peak inspiratory pressure; periodic interim ... |
| PPT | parietal pleural tissue; partial prothrombin time; peak-to-peak threshold; Pfeiffer-Palm-Teller [syn... |
| PEFR, PEF | Peak Expiratory Flow Rate |