“…3 Studies reporting transfusion practices outside of obstetrics frequently report a preference for at least 2 units when blood is transfused. 4,9,10 In nonobstetric patients, liberal blood transfusion has been associated with higher morbidity (cardiac, renal, and neurologic events and higher infection rates) and increased mortality compared with patients who received more restrictive transfusion. 7,8,11 Other transfusion risks include receiving the wrong blood, transfusion-transmitted infection, immunomodulation, 11 and red cell alloimmunization.…”