| PTFA | prothrombin time fixing agent |
|---|---|
| PTR | patellar tendon reflex; patient termination record; patient to return; peripheral total resistance; ... |
| PTT | partial thromboplastin time; particle transport time; posterior tibial tendon (transfer); prothrombi... |
| SPCA | serum prothrombin conversion accelerator; Society for Prevention of Cruelty to Animals |
| ANF | alpha-naphthoflavone; American Nurses' Foundation; antineuritic factor; antinuclear factor; atrial n... |