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Value of C-reactive protein in reflecting the magnitude of complement activation in children undergoing open heart
Insights
C-reactive protein (CRP) levels did not reliably predict postoperative complications in pediatric open heart surgery patients. Further research is needed due to the small sample size and observed complement activation.
Area of Science:
- Pediatric Cardiac Surgery
- Inflammatory Biomarkers
- Complement System
Background:
- Open heart surgery in children can lead to significant postoperative complications.
- C-reactive protein (CRP) is a common inflammatory marker.
- The relationship between CRP, complement activation, and outcomes in pediatric cardiac surgery is not fully understood.
Purpose of the Study:
- To investigate the kinetics of C-reactive protein (CRP) in children undergoing open heart surgery.
- To correlate CRP levels with complement activation (total hemolytic complement, C3a) and postoperative complications.
- To assess the utility of CRP in predicting adverse outcomes in this patient population.
Main Methods:
- Prospective study of 30 children (21 days - 16 years) undergoing open heart surgery.
- Serial measurements of CRP, total hemolytic complement, and complement C3a.
- Correlation analysis with postoperative complications and mortality.
Main Results:
- Mean peak CRP level was 108 mg/l at approximately 43 hours post-surgery.
- No significant difference in CRP concentrations was found between patients with and without complications.
- Extensive complement activation occurred in all patients, independent of CRP levels.
Conclusions:
- CRP kinetics did not correlate with the magnitude of complement activation post-cardiopulmonary bypass.
- The study suggests CRP may not be a reliable marker for detecting postoperative complications in pediatric open heart surgery.
- A small patient sample limits definitive conclusions, necessitating further investigation.
Abstract:
The kinetics of C-reactive protein (CRP) were studied prospectively in 30 children (aged 21 days - 16 years) undergoing open heart surgery. CRP was related to the kinetics of total haemolytic complement, complement C3a and postoperative complications. Two (7%) patients died and ten (33%) had postoperative complications. The patients with complications were younger (p less than 0.035), underwent longer perfusions (p less than 0.001) and had longer aortic cross-clamping times (p less than 0.003). The mean peak CRP level after surgery (108 mg/l) was reached, on the average, in 43 h. No statistical difference in CRP concentrations was found between the complication and non-complication groups. Extensive complement activation was seen in every patient. CRP did not reflect the magnitude of complement activation induced by cardiopulmonary bypass. The patient sample was too small to draw reliable conclusions about the value of CRP in detecting postoperative complications after open heart surgery in children.