| PRF | partial reinforcement; patient report form; perforin; plasma recognition factor; pontine reticular f... |
|---|---|
| PtcCO2 | transcutaneous partial pressure of carbon dioxide |
| PTT | partial thromboplastin time; particle transport time; posterior tibial tendon (transfer); prothrombi... |
| ptt | partial thromboplastin time |
| PVCO2 | partial pressure of carbon dioxide in mixed venous blood |