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Endotoxemia associated with cardiopulmonary bypass
The Journal of Thoracic and Cardiovascular Surgery
|June 1, 1987
Summary
During cardiopulmonary bypass, endotoxin (lipopolysaccharide) levels significantly increased, peaking during reperfusion. This rise correlated with bypass and cross-clamping duration, potentially impacting patient recovery.
Area of Science:
- Cardiovascular Surgery
- Immunology
- Biochemistry
Background:
- Endotoxin, also known as lipopolysaccharide, is a component of Gram-negative bacteria.
- Elevated endotoxin levels can trigger inflammatory responses and contribute to various pathologies.
Purpose of the Study:
- To investigate the changes in endotoxin (lipopolysaccharide) concentrations in patients undergoing cardiopulmonary bypass.
- To determine the correlation between endotoxin levels and the duration of cardiopulmonary bypass and aortic cross-clamping.
Main Methods:
- Systemic venous blood samples were collected from nine patients during cardiopulmonary bypass.
- Lipopolysaccharide concentrations were measured using a specified assay.
- Statistical analysis was performed to assess correlations between endotoxin levels and surgical parameters.
Main Results:
- Lipopolysaccharide concentrations remained stable before cardiopulmonary bypass.
- A progressive increase in lipopolysaccharide was observed during bypass, with a significant rise after aortic clamp release.
- Peak endotoxin levels correlated positively with the length of bypass and aortic cross-clamping duration.
Conclusions:
- Cardiopulmonary bypass is associated with a significant increase in systemic endotoxin levels.
- The duration of cardiopulmonary bypass and aortic cross-clamping influences the magnitude of endotoxin increase.
- Elevated endotoxin during reperfusion may contribute to prolonged postoperative recovery in some patients.