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In patients undergoing total knee replacement we carried out a longitudinal cohort study to determine the efficacy and safety of a postoperative autologous blood reinfusion system, as an alternative to homologous, banked blood transfusions. Fifty patients received reinfusion of unwashed, filtered, shed blood, supplemented with banked blood transfusions as required. A control group of 50 patients in whom standard suction drains were used received homologous blood transfusions as required. In the study group, the homologous blood requirement was reduced by 80%. There was no significant difference in the postoperative haemoglobin values between the two groups. None of the patients developed any adverse reactions after reinfusion.

Reinfusion of drained blood as an alternative to homologous blood transfusion after total knee replacement