Approach to the Neonate With Hypoglycemia

Area of Science:

• Neonatal Metabolism
• Endocrinology

Background:

• Healthy neonates experience physiological "transitional hypoglycemia" in early life.
• This involves a drop in plasma glucose to 57 mg/dL within 4 hours, rising to 82 mg/dL by 96 hours.

Observation:

• Recent data suggest transitional hypoglycemia stems from a persistent fetal beta-cell lower threshold for insulin release.
• This leads to a transient hyperinsulinemic state in newborns.

Findings:

• Hyperinsulinism is the leading cause of persistent hypoglycemia in neonates and infants.
• This condition poses a high risk for neurocognitive dysfunction due to severe hypoglycemia and impaired ketone production.

Implications:

• Identifying infants with persistent hypoglycemia disorders is critical due to the risk of neurologic injury.
• Screening at-risk neonates and completing evaluations before hospital discharge can prevent delayed diagnoses and neurological damage.