The results of this study suggest that perioperative RBC transfusions may be significantly associated with the development of new or progressive postoperative VTE, independent of several putative confounders. These findings, if validated, should reinforce the importance of rigorous perioperative management of blood transfusion practices.

Key Points Platelet transfusions are frequently administered to hospitalized patients with platelet consumptive/destructive disorders such as TTP, HIT, and ITP. Platelet transfusions are associated with higher odds of arterial thrombosis and mortality among TTP and HIT patients.