What dextrose infusion rate would be appropriate for an infant with documented hypoglycemia?

• A. 4-8 mg/kg/min
• B. 0.5-1 mg/kg/min
• C. 1-2 mg/kg/min
• D. 10-12 mg/kg/min

Answer: (A)

Treating neonatal hypoglycemia with intravenous dextrose aims to raise blood glucose quickly and then maintain it at a safe level because the infant’s brain relies on glucose and glycogen stores are limited. The maintenance infusion rate of dextrose is typically within a range that is high enough to meet the newborn’s rapid glucose needs but not so high as to cause unnecessary hyperglycemia or fluid/osmolar issues. A rate of 4–8 mg/kg/min provides that balance, enough to reverse ongoing hypoglycemia and keep glucose stable as you monitor and adjust.

To put it into practical terms, using a common 10% dextrose solution (which contains 100 mg/mL), delivering 6 mg/kg/min would require an infusion of about 0.06 mL/kg/min, equivalent to roughly 3.6 mL/kg/hour. After giving a rapid initial bolus to promptly correct glucose, clinicians use this maintenance range and adjust based on serial glucose measurements, aiming to keep the infant’s glucose within a safe range (above the threshold to prevent neurologic risk) and reduce the duration of hypoglycemia.