When to transfuse?

The Gist: “Permissive _____” is becoming increasing popular in medicine-blood glucose, blood pressure, and oxygen saturation. Hemoglobin is similar, but common refrains may be heard “well, he looks puny, let’s give him a couple of units.” Currently, the best evidence suggests that transfusion of packed red blood cells (PRBCs) should be considered in most critically ill medical patients, in the absence of massive hemorrhage, at a hemoglobin (hb) <7 g/dLlink here