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Hypoglycemia and Glucagon01:15

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Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
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Hypoglycemia is a blood glucose level below 70 mg/dL. It commonly occurs in individuals using insulin or insulin-secreting drugs, but may also arise in non-diabetic conditions. People with type 1 diabetes are at the highest risk because they depend on exogenous insulin. People with type 2 diabetes are also at risk, especially when treated with insulin or medications such as sulfonylureas, which increase insulin release regardless of blood glucose levels. It develops when insulin levels exceed...
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Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
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Diabetes Mellitus: Introduction01:26

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Diabetes mellitus consists of chronic metabolic disorders characterized by persistent hyperglycemia. This elevated blood glucose results from defects in insulin secretion, impaired insulin action, or both. Insulin, produced by pancreatic β-cells, is essential for maintaining glucose homeostasis by facilitating cellular glucose uptake for energy or storage. Disruptions in insulin production or function lead to glucose accumulation in the bloodstream, causing the clinical features and...
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Hyperglycemia01:29

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Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose...
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Biochemical Measurement of Neonatal Hypoxia
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Defining neonatal hypoglycaemia: a continuing debate.

Win Tin1

  • 1The James Cook University Hospital, Marton Road, Middlesbrough TS4 3BW, UK.

Seminars in Fetal & Neonatal Medicine
|October 24, 2013
PubMed
Summary
This summary is machine-generated.

Neonatal hypoglycemia, a common metabolic issue, requires careful management. This review questions the strict blood glucose cut-off for diagnosis, suggesting an operational threshold may be more appropriate for all newborns.

Keywords:
DefinitionHypoglycaemiaNeonate

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Area of Science:

  • Neonatal Medicine
  • Metabolic Adaptation
  • Pediatric Endocrinology

Background:

  • Neonatal hypoglycemia is a frequent metabolic challenge during the critical fetal-to-neonatal transition.
  • Transient low blood glucose is common in healthy newborns, reflecting normal adaptation.
  • Prolonged or recurrent hypoglycemia poses risks for neurological and developmental outcomes.

Purpose of the Study:

  • To critically evaluate the evidence supporting the widely accepted definition of neonatal hypoglycemia (<2.6 mmol/l or 47 mg/dl).
  • To identify knowledge gaps in defining neonatal hypoglycemia.
  • To advocate for the use of an 'operational threshold' instead of a single cut-off value.

Main Methods:

  • Critical appraisal of existing scientific literature and clinical guidelines.
  • Review of studies examining blood glucose levels in neonatal populations.
  • Analysis of the definition and diagnostic criteria for neonatal hypoglycemia.

Main Results:

  • The current definition of neonatal hypoglycemia (<2.6 mmol/l or 47 mg/dl) lacks robust evidence for universal application.
  • Significant variability exists in glucose homeostasis among newborns, challenging a one-size-fits-all diagnostic approach.
  • The concept of an operational threshold, considering individual infant factors, is proposed as a more nuanced approach.

Conclusions:

  • The strict numerical cut-off for neonatal hypoglycemia may not be universally applicable or clinically optimal.
  • Further research is needed to establish evidence-based operational thresholds for managing neonatal hypoglycemia.
  • A shift towards individualized assessment and management strategies is recommended over rigid diagnostic criteria.