| PaO2 | partial oxygen tension in arterial blood; partial pressure of oxygen in arterial blood |
|---|---|
| PBF | peripheral blod flow; placental blood flow; pulmonary blood flow |
| PBL | peripheral blood leukocyte; peripheral blood lymphocyte; problem-based learning |
| PBV | predicted blood volume; pulmonary blood volume |
| PRBC | packed red blood cells; placental residual blood volume |