Reduction in blood loss and blood use after cardiopulmonary bypass with high-dose aprotinin versus autologous fresh whole blood transfusion

Abstract

Ninety patients undergoing cardiac surgery were randomly divided into three groups of 30 patients to compare the effects on bleeding and transfusion requirements of either intraoperative infusion of high-dose aprotinin (Gpl) or reinfusion of autologous fresh whole blood (GpII) versus a control group (GpIII). Standardized anesthetic, perfusion, and surgical techniques were used. Platelet counts, hemoglobin concentration, hematocrit, fibrinogen, and Ivy-Nelson bleeding times determined at fixed times perioperatively did not differ among the three groups. The total loss from the chest drains was significantly reduced in GpI (328 ± 28 mL; mean ± SEM) as compared with the loss in GpII and GpIII (775 ± 75 mL and 834 ± 68 mL, respectively). There was a threefold difference in the total hemoglobin loss (GpI,14.2 ± 1.7 g; GpII, 50.1 ± 5.0 g; GpIII, 45.0 ± 5.2 g). GpI patients also received less banked blood: 250 ± 53 mL versus 507 ± 95 mL in GpII and 557 ± 75 mL in GpIII. No GpI patient required transfusion of platelets or fresh frozen plasma. Fresh whole autologous blood transfusions had no significant hemostatic effect and failed to reduce the homologous blood requirement. Conversely, high-dose aprotinin reduced blood loss and transfusion requirements.