D5NS Infusion Rate for Insulin Overdose-Induced Hypoglycemia
Initial Bolus Treatment
- Administer 0.5-1.0 g/kg of dextrose as an immediate bolus, equivalent to 10-20 mL/kg of D5W, or 2-4 mL/kg of D25W, for patients with insulin overdose-induced hypoglycemia 1, 2
- Titrated replacement is superior, giving 5-10 g aliquots of dextrose every 1-2 minutes until symptoms resolve, rather than a single large bolus, to prevent overcorrection and achieve lower final blood glucose levels 3, 2
Continuous Infusion Protocol
- Start D10W at 100 mL/kg per 24 hours, equivalent to 7 mg/kg per minute or approximately 4.2 mL/kg/hour, for continuous infusion in patients with insulin overdose-induced hypoglycemia 1
- Titrate the infusion rate to maintain blood glucose 100-180 mg/dL, with monitoring every 30-60 minutes initially, in patients with insulin overdose-induced hypoglycemia 1, 2
Critical Monitoring Requirements
- Monitor blood glucose every 1-2 hours during continuous infusion, and serum potassium and sodium levels carefully, as dextrose administration can cause electrolyte shifts, in patients with insulin overdose-induced hypoglycemia 3, 2, 1, 2
Target Blood Glucose Range
- Maintain blood glucose 100-180 mg/dL for most patients with insulin overdose-induced hypoglycemia, and avoid both hypoglycemia and hyperglycemia, as both have adverse central nervous system effects 1
Prevention of Rebound Hypoglycemia
- Reduce infusion rate by 50% over the final 30 minutes before discontinuing dextrose to prevent rebound hypoglycemia, in patients with insulin overdose-induced hypoglycemia 2
- Never abruptly discontinue dextrose infusion in insulin overdose patients, to prevent rebound hypoglycemia 2
Why D10W is Preferred Over D5NS
- D10W provides adequate dextrose delivery at reasonable fluid volumes, and is preferred over D5NS for patients with insulin overdose-induced hypoglycemia 1, 2
- Normal saline component in D5NS is unnecessary unless concurrent sodium replacement is needed, in patients with insulin overdose-induced hypoglycemia 1