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Benefit from combining blood conservation measures in cardiac operations
J W Jones1, R E Rawitscher, T R McLean
1Cora and Webb Mading Department of Surgery, Baylor College of Medicine, Houston, Texas.
The Annals of Thoracic Surgery
|April 1, 1991
Summary
Combining blood conservation techniques like intraoperative autotransfusion and plasmapheresis significantly reduces homologous blood transfusions in complex cardiac surgery. This approach safely lowers transfusion needs, even with profound hemodilution during cardiopulmonary bypass.
Area of Science:
- Cardiac Surgery
- Transfusion Medicine
- Anesthesiology
Background:
- Conventional blood conservation methods are inadequate for complex cardiac operations.
- Increasingly complex cardiac surgeries necessitate advanced transfusion strategies.
Purpose of the Study:
- To evaluate the effectiveness of combined blood conservation techniques.
- To assess the safety and efficacy of reducing homologous blood transfusions in cardiac surgery.
Main Methods:
- 300 patients were divided into three groups, applying different combinations of intraoperative autotransfusion, mediastinal drainage return, and intraoperative plasmapheresis.
- Transfusion triggers varied: <0.21 hematocrit for Groups 1 & 2, and <0.15 for Group 3 during cardiopulmonary bypass.
- Perioperative morbidity and mortality were monitored.
Main Results:
- Group 3 (combined measures with a lower bypass hematocrit trigger) showed significantly lower intraoperative (7%) and overall hospitalization (18%) transfusion rates compared to Groups 1 (34%, 68%) and 2 (28%, 36%).
- Average units transfused were lowest in Group 3 (0.37 ± 0.07) versus Group 2 (0.7 ± 0.15) and Group 1 (2.16 ± 0.25).
- Perioperative morbidity (myocardial infarction, stroke) and mortality rates were similar across groups, with no deaths in Group 3.
Conclusions:
- Combining complementary blood conservation measures effectively reduces homologous blood transfusions in cardiac surgery.
- Allowing profound hemodilution during cardiopulmonary bypass can be safely employed to reduce transfusion requirements.
- This strategy offers a safe and effective method for minimizing allogeneic blood exposure in complex cardiac procedures.