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Glucose management in the infant under six kilograms
1Division of Cardiopulmonary Surgery, Oregon Health Sciences University, Portland 97201, USA.
Perfusion
|September 23, 1997
Summary
Hyperglycaemia (high blood glucose) is common in infants undergoing complex heart surgery with cardiopulmonary bypass (CPB) and hypothermia. Monitoring blood glucose during and after CPB is crucial for these young patients.
Area of Science:
- Pediatric Cardiology
- Cardiovascular Surgery
- Pediatric Critical Care
Background:
- Complex congenital heart defects often require surgical intervention in infants.
- Cardiopulmonary bypass (CPB) with hypothermia is a common technique used during these surgeries.
- Hyperglycaemia can lead to adverse metabolic changes and potentially impact neurological outcomes.
Purpose of the Study:
- To evaluate the frequency of hyperglycaemia in very young children undergoing complex congenital heart defect repair.
- To assess the impact of different hypothermia and CPB strategies on blood glucose levels.
Main Methods:
- A retrospective, nonrandomized study involving three groups of infants (<6 kg) undergoing CPB.
- Group 1: Standard bypass, moderate hypothermia (26°C).
- Group 2: Low-flow bypass, profound hypothermia (20°C).
- Group 3: Total circulatory arrest, profound hypothermia (18°C).
- Blood glucose levels were measured preoperatively, during bypass, during rewarming, and 1-hour postoperatively.
Main Results:
- Group 1 maintained normal blood glucose levels throughout the study period.
- Groups 2 and 3 exhibited hyperglycaemic blood glucose levels during rewarming and 1-hour postoperatively.
- Specifically, Group 2 showed levels of 185 ± 17.2 mg/dl during rewarming and 168 ± 16.5 mg/dl postoperatively.
- Group 3 showed levels of 133 ± 29.4 mg/dl during rewarming and 130 ± 33.3 mg/dl postoperatively.
Conclusions:
- Infants undergoing complex congenital heart repair with CPB and profound hypothermia are at risk for developing hyperglycaemia.
- The findings suggest that blood glucose monitoring is essential during and after CPB in this vulnerable population.
- Further research may be warranted to explore the clinical implications and management strategies for perioperative hyperglycaemia in pediatric cardiac surgery.