How should an overinfusion of 5% dextrose intravenous fluid be managed in a 1‑year‑old child?

Management of D5 Intravenous Fluid Overinfusion in a 1-Year-Old

Immediately stop the D5 fluid infusion and switch to isotonic maintenance fluid (0.9% saline with 5% dextrose or balanced isotonic solution) while closely monitoring serum sodium and glucose levels. 1, 2

Immediate Actions

Discontinue Hypotonic Fluid

• Stop the D5 infusion immediately as this hypotonic fluid significantly increases the risk of life-threatening hyponatremia in acutely ill children 2
• D5 water (or D5 with minimal electrolytes) has been associated with fatal outcomes when used as resuscitation or maintenance fluid in pediatric patients 3

Switch to Isotonic Maintenance Fluid

• Transition to isotonic fluid with appropriate dextrose: Use 0.9% saline with 5% dextrose (D5NS) or a balanced isotonic solution like D5 lactated Ringer's 1, 2
• Isotonic fluids (sodium 130-154 mEq/L) significantly reduce hyponatremia risk without increasing adverse effects 2, 4, 5
• The 2018 AAP guidelines provide strong evidence (Grade A) that isotonic solutions should be used for all children 28 days to 18 years requiring maintenance IV fluids 2

Critical Monitoring

Immediate Laboratory Assessment

• Check serum sodium immediately to assess for hyponatremia (sodium <135 mEq/L), which occurs in 15-30% of hospitalized children receiving hypotonic fluids 2
• Monitor blood glucose at least daily (or more frequently if symptomatic) to prevent both hypoglycemia and hyperglycemia from excessive dextrose administration 1
• Measure serum electrolytes including potassium, as appropriate potassium supplementation should be added based on clinical status 1

Assess for Hyponatremic Encephalopathy

• Evaluate for neurologic symptoms: unexplained nausea, vomiting, headache, confusion, lethargy, or altered mental status 2
• Hyponatremic encephalopathy is a medical emergency that can be fatal or cause irreversible brain injury if inadequately treated 2
• Children are particularly vulnerable due to increased endogenous ADH secretion during acute illness, which impairs free-water excretion 2

Fluid Volume Management

Calculate Appropriate Maintenance Rate

• Assess total fluid intake including all IV fluids, medications (both infusions and boluses), line flushes, blood products, and enteral intake 1
• For children at risk of increased ADH secretion (most acutely ill children), consider restricting maintenance fluid to 65-80% of the Holliday-Segar calculated volume to avoid fluid overload 1
• Avoid cumulative positive fluid balance as this prolongs mechanical ventilation and length of stay 1

Ongoing Reassessment

• Reassess fluid balance and clinical status at least daily while on IV maintenance fluids 1
• Monitor electrolytes regularly, especially sodium levels 1, 2
• Children requiring major surgery, ICU care, or those with large GI losses or on diuretics need more frequent laboratory monitoring 2

Key Clinical Pitfalls

Common Errors to Avoid

• Never use hypotonic fluids (D5W, 0.18% saline, 0.45% saline) as standard maintenance fluids in acutely ill children 2, 3
• Research demonstrates that 0.18% saline in 5% dextrose at standard maintenance rates causes hyponatremia in 14.3% of children versus only 1.7% with isotonic saline 4
• Even children receiving isotonic fluids remain at risk for hyponatremia if they receive IV medications containing free water or consume additional free water enterally 2

Special Considerations for 1-Year-Olds

• Ensure adequate glucose provision (typically 5% dextrose) to prevent hypoglycemia, which is more common in young children 1
• Monitor for signs of fluid overload including edema, respiratory distress, or weight gain 1
• One study reported asymptomatic hypoglycemia in a patient receiving normal saline at restricted rates, emphasizing the need for glucose monitoring 6