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Intraoperative hemodilution during elective vascular reconstruction
Surgery, Gynecology & Obstetrics
|December 1, 1979
Summary
Intraoperative hemodilution and retransfusion effectively replaced blood in vascular surgery patients, minimizing the need for homologous blood transfusions. This technique maintained adequate oxygen transport despite transiently low hematocrit levels.
Area of Science:
- Cardiovascular Surgery
- Anesthesiology
- Transfusion Medicine
Background:
- Intraoperative blood loss is a significant concern in major vascular surgeries.
- Homologous blood transfusions carry risks, including transfusion reactions and disease transmission.
- Autologous blood management strategies aim to reduce reliance on allogeneic blood products.
Purpose of the Study:
- To evaluate the efficacy and safety of intraoperative hemodilution and retransfusion for blood replacement in elective aortic and femoropopliteal reconstruction.
- To assess the impact of this technique on hemodynamic parameters and coagulation.
- To determine the reduction in homologous blood usage.
Main Methods:
- 30 patients undergoing elective abdominal aorta, thoracic aorta, or femoropopliteal reconstruction.
- Collection of 1,000-2,000 mL autologous blood during anesthesia induction and initial surgical exposure.
- Replacement of shed blood with 1.5 volumes of colloid and crystalloid solutions.
- Reinfusion of collected autologous blood at the procedure's conclusion.
- Hemodynamic monitoring (Swan-Ganz catheter in 15 patients) and serial blood sampling for hematocrit and coagulation studies.
Main Results:
- Adequate systemic oxygen transport was maintained, evidenced by improved cardiac output and reduced peripheral vascular resistance during hemodilution.
- Transient dilution of coagulation factors occurred (abnormal prothrombin and partial thromboplastin times), but without serious bleeding.
- 21 out of 30 patients received no homologous blood.
- Overall, only 0.46 units of homologous blood per patient were required during the study period.
Conclusions:
- Intraoperative hemodilution and retransfusion is a safe and effective method for blood replacement in major vascular surgery.
- This technique significantly reduces the need for homologous blood transfusions.
- The method supports adequate hemodynamic function and oxygen transport during periods of maximal blood loss.