Management of Diabetic Ketoacidosis with Hypernatremia

Fluid Management

The American Diabetes Association recommends starting with isotonic saline (0.9% NaCl) at 15-20 ml/kg/h to restore intravascular volume and renal perfusion, regardless of sodium level 1, 2, 3
Switch to hypotonic fluid (0.45% NaCl) at 4-14 ml/kg/h if corrected sodium is normal or elevated 1, 2, 4
Transition to D5W with 0.45% NaCl (dextrose 5% in half-normal saline) when glucose reaches 250 mg/dL, providing free water to correct hypernatremia while maintaining glucose levels 1
Add 20-30 mEq/L potassium (2/3 KCl and 1/3 KPO4) once renal function is assured 1, 2, 5

Calculate corrected sodium by adding 1.6 mEq/L to measured sodium for every 100 mg/dL glucose above 100 mg/dL 1, 2, 4
Correct estimated fluid deficits within 24 hours 1, 4, 3
Do not exceed 3 mOsm/kg/h change in serum osmolality to prevent cerebral edema and osmotic demyelination 1, 2, 4, 3
Target sodium correction rate: Maximum 8-10 mEq/L per 24 hours 1, 4

Check basic metabolic panel every 2-4 hours during active treatment 6, 7
Monitor glucose hourly and calculate corrected sodium with each lab draw 1, 2, 4
Track serum osmolality to ensure change does not exceed 3 mOsm/kg/h 1, 2, 3
Assess mental status frequently and monitor for signs of cerebral edema (headache, altered consciousness, seizures) 6, 7

Ensure potassium ≥3.3 mEq/L before starting insulin to prevent life-threatening arrhythmias 5, 8
Add potassium to all fluids once urine output is established (20-30 mEq/L for adults) 1, 2, 5