Objective: To determine the safety and effectiveness of autotransfusion of shed mediastinal blood after open heart surgery.
Methods: Sixty patients undergoing coronary artery bypass grafting (CABG) were selected randomly to receive either nonwashed shed mediastinal blood (Group 1, n = 30) or banked blood (Group 2, n = 30). Drainage and transfusion volume were determined after the operation. Hb, RBC, HCT and PLT were detected immediately before and after the operation, as well as 24 hours and 7 days after the operation. Data were analyzed using Fisher's exact test. A P < 0.05 was considered significant.
Results: There were no significant differences in Hb, HCT, PLT or length of cardiopulmonary bypass (CPB) (P > 0.05). In the two groups, no significant difference in the mean blood loss was observed during 24 hours after the operation (660 +/- 300 ml in Group 1 and 655 +/- 280 ml in Group 2, P > 0.05). In Group 1, the mean volume autotransfused was 280 +/- 160 ml, and the patients required 360 +/- 80 ml banked blood compared with 660 +/- 120 ml in Group 2. In other words, the banked blood requirement in Group 1 was 40% lower.
Conclusions: Autotransfusion of shed mediastinal blood after an open heart operation is safe and effective.
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