Cooperation of departments associated with blood transfusion for massive intraoperative hemorrhage

: Establishing cooperative relationship is critical for departments associated with blood transfusion for massive intraoperative hemorrhage, because it is directly linked to saving lives. To achieve this aim, careful preparation and establishment of in-house rules based on the "Guidelines for Management of Critical Bleeding", depending on site-specific situations, are necessary. Blood transfusion departments should (1) share recognition with other departments in the hospital, (2) educate practitioners in blood transfusion, and (3) exchange information with blood centers. In addition, it should be recognized that regular simulations are indispensable for ensuring prompt response to emergency situations.