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The use of minimized extracorporeal circulation system has a beneficial effect on hemostasis--a randomized clinical
Ulf Abdel-Rahman1, Sven Martens, Petar Risteski
1Department of Thoracic and Cardiovascular Surgery, Johann Wolfgang Goethe University, Frankfurt/Main, Germany. abdel-rahman@em.uni-frankfurt.de
Insights
The CorX system, a miniaturized cardiopulmonary bypass circuit, significantly reduces coagulation and fibrinolysis activation during coronary artery bypass grafting compared to conventional CPB. This suggests improved hemostasis balance in cardiac surgery.
Area of Science:
- Cardiovascular Surgery
- Hemostasis and Thrombosis
- Biomedical Engineering
Background:
- Conventional cardiopulmonary bypass (CPB) is linked to heightened coagulation and fibrinolytic activity.
- A novel closed, miniaturized bypass circuit (CorX) minimizes tubing volume and omits a cardiotomy reservoir.
- This study compares the hemostatic effects of CorX versus conventional CPB in coronary artery bypass grafting.
Purpose of the Study:
- To investigate the impact of the CorX system on hemostasis during cardiac surgery.
- To compare the activation of coagulation and fibrinolysis between CorX and conventional CPB.
- To evaluate secondary hemostatic parameters and blood loss associated with the CorX system.
Main Methods:
- A prospective randomized trial involving 81 patients undergoing coronary artery bypass grafting.
- Patients were assigned to either the CorX system (n=39) or a standard CPB system (n=42).
- Primary endpoints included platelet count, plasmin-antiplasmin complex, prothrombin fragments 1+2, D-dimers, and fibrinogen; secondary endpoints assessed hematocrit, blood loss, and transfusion requirements.
Main Results:
- The CorX system showed significantly lower plasmin-antiplasmin complex and prothrombin fragments 1+2 levels post-declamping.
- D-dimer levels were significantly different between groups at 1 hour post-CPB.
- Hematocrit was significantly higher in the CorX group (26% vs. 22%) at the end of CPB.
Conclusions:
- The CorX system significantly suppresses the activation of coagulation and fibrinolytic cascades compared to conventional CPB.
- While not reducing postoperative blood loss in this study, CorX represents an advancement in minimizing hemostatic imbalance during cardiac surgery.
- Miniaturized extracorporeal circuits offer a promising approach to improved hemostasis in cardiac procedures.
Background:
Conventional cardiopulmonary bypass (CPB) is associated with increased coagulation and fibrinolytic activity. A closed miniaturized bypass circuit (CorX) features a significantly reduced tubing set, an integrated pump, and an air removal system without a cardiotomy reservoir. In a prospective randomized trial, the effects on hemostasis were investigated while comparing CorX with conventional CPB in patients undergoing coronary artery bypass grafting.
Methods:
Over a period of 1 year, 81 patients were randomly assigned either to the CorX system (n = 39, group A) or standard CPB system (n = 42, group B). Primary endpoints were platelet count, plasmin-antiplasmin complex (PAP), prothrombin fragments 1+2 (F1+F2), D-dimers, and fibrinogen. Secondary end-points were hematocrit, blood loss in the first 12 hours postoperatively, transfused packed red blood cells, and fresh frozen plasma in the first 24 hours postoperatively. In addition, we analyzed partial thromboplastin time, prothrombin time, and antithrombin III.
Results:
After aortic declamping, PAP complex and prothrombin F1+F2 were significantly lower in group A than in group B. The difference in D-dimers between groups reached significance at 1 hour post-CPB. Hematocrit values at the end of CPB measured 26 +/- 6% in group A versus 22 +/- 4% in group B (P = .01). The rest of the observed parameters did not significantly differ between groups.
Conclusion:
Postoperative blood loss was not reduced in the present study. However, the use of the CorX system leads to a significant suppression of activation of coagulation and fibrinolytic cascades compared to conventional CPB, suggesting that miniaturized extracorporeal circuits are a step forward toward reduced imbalance of hemostasis in cardiac surgery.
