Hypoglycaemia in childhood diabetes. I. Clinical signs and hormonal counterregulation
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Published on: November 16, 2011
Insights
Hypoglycaemia in diabetic children causes increased stress hormones and altered glucagon response. Glucagon injection may be vital for treating unconscious hypoglycaemic children lacking natural glucagon secretion.
Area of Science:
- Pediatric Endocrinology
- Metabolic Disorders
Background:
- Hypoglycaemia is a common complication in pediatric diabetes management.
- Understanding the body's hormonal response to low blood glucose is crucial for effective treatment.
Purpose of the Study:
- To investigate the hormonal and clinical responses to induced hypoglycaemia in diabetic children.
- To explore the relationship between hypoglycaemia, hormonal levels, and diabetes-specific factors.
Main Methods:
- Induced hypoglycaemia in 28 diabetic children by reducing their morning meal.
- Measured plasma concentrations of adrenalin, noradrenalin, cortisol, and glucagon.
- Correlated hormonal levels with blood glucose, C-peptide, free insulin, and diabetes duration.
Main Results:
- Fatigue and pallor were the most common hypoglycaemia signs.
- Adrenalin, noradrenalin, and cortisol levels significantly increased during hypoglycaemia.
- Glucagon response was linked to C-peptide levels and diabetes duration; absent in C-peptide deficient children.
- Adrenergic signs correlated with plasma adrenalin; neuroglucopenic signs with blood glucose.
Conclusions:
- Diabetic children exhibit significant hormonal counter-regulation during hypoglycaemia.
- Glucagon secretion is impaired in children with low or absent C-peptide.
- Glucagon injection is a recommended treatment for unconscious hypoglycaemic children, especially when glucagon secretion is compromised.
Abstract:
Hypoglycaemia (blood glucose 1.3-2.5 mmol/l) was induced in twenty-eight diabetic children by reduction of their morning meal. Fatigue and pallor were the most common signs of hypoglycaemia. Compared to findings during normoglycaemia, plasma concentrations of adrenalin, noradrenalin and cortisol were significantly higher at glucose nadir. Plasma glucagon concentration at glucose nadir was correlated to the fasting C-peptide concentration and inversely to the duration of diabetes. Children who lacked C-peptide also lacked glucagon response to hypoglycaemia. The parents' opinion of the need to give carbohydrates corresponded to the blood glucose level. The presence of adrenergic signs correlated to the plasma adrenalin and the neuroglucopenic signs to blood glucose. The lowest glucose level correlated inversely to the concentration of free insulin. When facilities for glucose infusion are lacking, a rational step in treating the unconscious hypoglycaemic child seems to be the injection of glucagon, considering the blunted or absent glucagon secretion.
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