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Activation of inflammatory systems during cardiopulmonary bypass
L Nilsson1, S Brunnkvist, U Nilsson
1Department of Thoracic Surgery, University Hospital, Uppsala, Sweden.
Insights
Whole body inflammation during cardiopulmonary bypass may cause complications after open-heart surgery. Researchers observed complement activation and increased inflammatory markers in patients, suggesting issues with medical device biocompatibility.
Area of Science:
- Cardiovascular Surgery
- Immunology
- Biomaterials Science
Background:
- Cardiopulmonary bypass (CPB) in open-heart surgery can trigger systemic inflammatory responses.
- This "whole body inflammation" is implicated in postoperative complications.
- Understanding the inflammatory mechanisms is crucial for improving patient outcomes.
Purpose of the Study:
- To investigate the inflammatory response during CPB in patients undergoing aortocoronary bypass surgery.
- To assess complement activation and neutrophil granulocyte degranulation markers.
- To explore the role of extracorporeal device surfaces in initiating inflammation.
Main Methods:
- Studied six patients undergoing aortocoronary bypass surgery.
- Monitored complement activation.
- Measured plasma levels of lactoferrin and myeloperoxidase (neutrophil granulocyte factors).
Main Results:
- Demonstrated significant complement activation in patients.
- Observed substantially increased plasma levels of lactoferrin and myeloperoxidase.
- Indicated a strong inflammatory response linked to the CPB procedure.
Conclusions:
- Whole body inflammation during CPB is evident and involves complement activation and neutrophil degranulation.
- Artificial surfaces of extracorporeal devices likely trigger these inflammatory systems.
- Further research into the biocompatibility of CPB components is warranted.
Abstract:
"Whole body inflammation" induced by cardiopulmonary bypass may play a role in the pathogenesis of postoperative complications after open-heart surgery. The inflammatory response, in terms of complement activation and release of granular proteins from neutrophil granulocytes, was investigated in six patients undergoing aortocoronary bypass surgery. Complement activation was demonstrated as well as substantially increased plasma levels of lactoferrin and myeloperoxidase--two granulocyte factors. The activation of inflammatory systems probably takes place on the artificial surfaces of the extracorporeal device. The biocompatibility of these components therefore should be further studied.