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Biocompatibility in cardiopulmonary bypass
1Bentley Division, Baxter Healthcare Corp. Irvine, CA 92714, USA.
Summary
Cardiopulmonary bypass (CPB) in cardiac surgery triggers a whole-body inflammatory response. Strategies to control blood activation, including heparin-coated circuits, are crucial for mitigating CPB
Area of Science:
- Cardiovascular Surgery
- Hematology
- Immunology
Background:
- Cardiac operations with cardiopulmonary bypass (CPB) are common but linked to significant complications.
- These complications include bleeding, thrombosis, fluid shifts, and a systemic inflammatory response.
- Understanding blood activation during CPB is critical for patient outcomes.
Purpose of the Study:
- To review the impact of cardiopulmonary bypass on blood components.
- To examine the causes of blood activation during CPB.
- To describe methods for controlling blood activation and inflammation.
Main Methods:
- Review of literature on cardiopulmonary bypass effects on blood.
- Analysis of blood activation mechanisms (material-dependent and independent).
- Evaluation of strategies to mitigate CPB-induced inflammation, including surface modification, flow control, pharmacology, and mediator removal.
Main Results:
- CPB activates humoral and cellular blood components.
- Blood activation stems from interaction with extracorporeal circuits and non-material stimuli.
- Heparin-coated circuits show promise in reducing inflammatory response and improving outcomes.
Conclusions:
- The inflammatory response to CPB is multifactorial.
- An integrated strategy is necessary to manage and prevent CPB-related adverse effects.
- Further research into advanced circuit technologies and interventions is warranted.