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The acute phase response to cardiopulmonary bypass in children
I M Mitchell1, L Brady, J Black
1Department of Cardiac Surgery, Royal Hospital for Sick Children, Glasgow.
Insights
Children undergoing cardiopulmonary bypass exhibit distinct acute phase responses compared to adults. Pediatric surgical stress impacts protein synthesis and response capacity due to developmental immaturity.
Area of Science:
- Pediatric surgery
- Cardiopulmonary bypass
- Acute phase response
Background:
- The endocrine stress response in children post-cardiopulmonary bypass differs from adults.
- The acute phase response in pediatric surgical patients requires further investigation.
Purpose of the Study:
- To investigate differences in the acute phase response between children and adults following cardiopulmonary bypass.
- To analyze specific protein and metal concentrations during the pediatric surgical stress response.
Main Methods:
- Studied 13 children (mean age 2.65 years) with congenital heart disease undergoing corrective surgery.
- Collected blood samples pre-operatively and at multiple time points up to 120 hours post-operation.
- Analyzed C-reactive protein, albumin, caeruloplasmin, zinc, and copper concentrations, calculating metal:carrier protein molar ratios.
Main Results:
- Observed quantitative and qualitative differences in the acute phase response compared to adult patterns.
- Demonstrated altered concentrations of acute phase proteins and metal ions in pediatric surgical patients.
- Calculated metal:carrier protein molar ratios revealed unique pediatric response dynamics.
Conclusions:
- Pediatric acute phase response to cardiopulmonary bypass shows significant differences from adults.
- Immature protein synthesis capacity in children limits their ability to respond to surgical stress.
- Developmental immaturity influences the qualitative and quantitative aspects of the pediatric acute phase response.
Abstract:
The endocrine phase of the stress response to cardiopulmonary bypass in children is known to be subtly different from that seen in adults. The aim of this investigation was to determine whether there are similar differences in the acute phase response. Thirteen children were studied (mean age 2.65 years). Each child had congenital heart disease and underwent corrective cardiac surgery. Blood samples taken two days prior to operation and at 6, 9, 12, 24, 48 and 120 hours after were analysed for C-reactive protein, albumin, caeruloplasmin, zinc and copper concentrations. Metal:carrier protein molar ratios were also calculated. Results demonstrate changes which, although similar to those seen in adults, differed both quantitatively and qualitatively. This is explained by the concept of immaturity leading to a generally poor capacity for protein synthesis and a relative inability to respond to altered circumstances.
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