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Efficacy of intraoperative blood salvage during coronary artery bypass grafting
1Department of Anesthesiology, St. Louis University, USA.
Insights
Intraoperative autologous blood salvage significantly reduces the need for homologous blood transfusions in cardiac surgery. Combining it with isovolemic hemodilution further enhances this effect, minimizing donor blood exposure.
Area of Science:
- Cardiovascular Surgery
- Transfusion Medicine
- Anesthesiology
Background:
- Cardiac surgery frequently necessitates blood transfusions, increasing risks.
- Autologous blood salvage and hemodilution are strategies to mitigate homologous blood use.
Purpose of the Study:
- To evaluate the efficacy of intraoperative autologous blood salvage.
- To assess the added benefit of isovolemic hemodilution with autologous blood salvage.
- To compare two distinct autologous blood salvage techniques.
Main Methods:
- Retrospective analysis of 162 coronary artery bypass grafting (CABG) patients.
- Review of transfusion records for patients undergoing intraoperative autologous blood salvage and isovolemic hemodilution.
- Comparison with a different cell saver system (intraoperative collection, postoperative reinfusion).
Main Results:
- Intraoperative cell saver use alone avoided homologous transfusion in 19% of patients.
- Combining cell saver with isovolemic hemodilution avoided homologous transfusion in 54% of patients.
- The intraoperative cell saver system yielded more timely and greater blood recovery, reducing homologous transfusion needs compared to the other system.
Conclusions:
- Intraoperative autologous blood salvage provides an immediate red blood cell source, decreasing homologous blood utilization.
- Isovolumetric hemodilution combined with blood salvage further reduces the requirement for homologous blood transfusions.
- The studied intraoperative cell saver system demonstrated superior performance in blood recovery and transfusion reduction.
Objective:
To analyze the usefulness of autologous blood salvage and intraoperative isovolemic hemodilution in conjunction with autologous blood salvage in cardiac surgery, and also to compare two different autologous blood salvage methods.
Experimental Design:
Retrospective analysis of transfusion practice in cardiac surgery.
Setting:
University hospital.
Patients:
One hundred and sixty two consecutive patients who had coronary artery bypass grafting (CABG) from January to September, 1993.
Interventions:
A review of transfusion records of patients who underwent intraoperative autologous blood salvage and isovolemic hemodilution.
Measures:
Perioperative transfusion requirements were analyzed in patients undergoing CABG using a cell saver system whereby blood was collected, processed and reinfused to the patients in the operating room.
Results:
Nineteen percent of patients did not receive perioperative homologous blood transfusion when a cell saver was used intraoperatively. When autologous isovolemic hemodilution was used in conjunction with a cell saver, fifty-four percent of the patients did not receive homologous blood transfusion. The results of this study were compared to matched patients undergoing CABG using a different type of cell saver system whereby blood was collected in the operating room, processed in the blood bank and reinfused in the intra- and/or postoperative period. We found that the former system provided a more timely and greater yield of blood salvaged and as a consequence, less homologous blood transfusion.
Conclusions:
Intraoperative blood salvaging provides an immediate source of red blood cells and decreases the utilization of homologous blood. In addition, isovolemic hemodilution in conjunction with blood salvage further decreases homologous blood transfusion needs.