Predeposit autologous blood transfusion and its effect on the usage of homologous blood in perioperative period for the patients undergoing surgery.

This study summarized the cases of autologous blood transfusion in the Akita University Hospital since 1989 and evaluated the effects of autologous blood transfusion on the usage of homologous blood for surgical procedures.A total of 279 cases were entered in the autologous blood donation programs since 1989. No homologous blood was transfused for 232 cases (83%) in total and 49 cases (68%) and 148 cases (87%) in cardiovascular surgery and orthopedic surgery, respectively. Since MAP solution has been introduced in autologous blood donation programs, leap frog or switch back method will not be applied to collect autologous blood for a long period. The MAP autologous blood donation can make the program easier. In some of the surgical procedures with predeposit autologous blood, the average units of homologous blood prepared were decreased compared with the cases without autologous blood. However, C/T ratio of homologous blood was increased in the some cases with autologous blood. In such cases, the units of MSBOS should be allocated depending on the units of autologous blood prepared.Autologous blood donation programs and the MSBOS system should be closely linked to evaluate, thus, effective blood usage can be achieved.