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Interactions between hypoglycemia and sleep architecture in children with type 1 diabetes mellitus
Giora Pillar1, Guy Schuscheim, Ram Weiss
1Pediatrics Department A, Rambam Medical Center, and Technion-Israel Institute of Technology, Haifa, Israel.
Insights
Nocturnal hypoglycemia in children with type 1 diabetes mellitus (DM) may be associated with improved sleep quality. Rapid glucose level changes, not absolute levels, trigger awakenings, suggesting sleep may blunt arousal responses.
Area of Science:
- Pediatric Endocrinology
- Sleep Medicine
- Diabetes Mellitus Research
Background:
- Nocturnal hypoglycemia is a significant concern in pediatric type 1 diabetes management.
- Understanding the interplay between sleep and glucose regulation is crucial for optimizing treatment strategies.
Purpose of the Study:
- To investigate the relationship between nocturnal hypoglycemia and sleep patterns in children with type 1 diabetes mellitus (DM).
- To determine if hypoglycemia affects sleep architecture and arousal responses.
Main Methods:
- Polysomnography was conducted on 15 children with DM and 15 controls.
- Continuous glucose monitoring (CGM) was used in diabetic children.
- Sympathetic responses were assessed in a subset of participants using peripheral arterial tonometry.
Main Results:
- 33% of children with DM experienced profound nocturnal hypoglycemia.
- Hypoglycemia was linked to increased sleep efficiency, slow-wave sleep, and EEG Delta power.
- Rapid glucose decline (>25 mg/dL/hour), not absolute levels, correlated with awakenings; sympathetic activation was not observed.
Conclusions:
- Sleep may suppress sympathetic and arousal responses to hypoglycemia in children with type 1 diabetes.
- Rapid fluctuations in glucose levels, rather than the severity of hypoglycemia, may trigger awakenings.
- Continuous glucose monitoring during sleep offers valuable insights for managing pediatric diabetes.
Objectives:
To assess the interactions between nocturnal hypoglycemia and sleep in children with type 1 diabetes mellitus (DM).
Study Design:
Children with DM (n = 15) and 15 matched control children underwent full night polysomnographic recordings. Blood glucose levels were measured in the diabetic children by means of the MiniMed Continuous Glucose Monitoring System. Six of the diabetic children were also studied by peripheral arterial tonometry (an indirect indicator of sympathetic responses).
Results:
Five children with DM (33%) had profound nocturnal hypoglycemia, which was associated with increased sleep efficiency, increased slow wave sleep, and increased Delta power in spectral analysis of the electroencephalogram. Hypoglycemic episodes were not associated with sympathetic activation. Rapid decline in glucose levels (>25 mg/dL/hour) but not the absolute degree of hypoglycemia were associated with awakenings from sleep.
Conclusions:
We conclude that sleep may inhibit sympathetic and arousal response to hypoglycemia. Rapid changes in glucose levels, independent of absolute glucose levels, may result in awakening from sleep. Continuous measurement of glucose levels during sleep may add important features in the treatment of children with DM.