| PRBC | packed red blood cells; placental residual blood volume |
|---|---|
| PRBV | placental residual blood volume |
| pTNM | TNM staging of tumors as determined by correlation of clinical, pathologic, and residual findings |
| PVR | peripheral vascular resistance; perspective volume rendering; poliovirus receptor; postvoiding resid... |
| RA | radioactive; ragocyte; ragweed antigen; rapidly adapting [receptors]; reactive arthritis; reciprocal... |