Initial Fluid Replacement for Diabetic Ketoacidosis (DKA)

Adult Fluid Resuscitation Protocol

The American Diabetes Association recommends initial fluid therapy with isotonic saline (0.9% NaCl) infused at a rate of 15-20 ml/kg body weight/hour during the first hour for adult patients with DKA 1, 2, 3
Initial fluid therapy aims to expand intravascular and extravascular volume and restore renal perfusion in adult patients with DKA 2
In the absence of cardiac compromise, the American Diabetes Association suggests beginning with 0.9% NaCl at 15-20 ml/kg/h for the first hour in adult patients with DKA 1, 3
After the first hour, fluid choice depends on hydration status, serum electrolyte levels, and urine output in adult patients with DKA 1
For subsequent fluid replacement, the American Diabetes Association recommends using 0.45% NaCl at 4-14 ml/kg/h if corrected serum sodium is normal or elevated in adult patients with DKA 1, 3
The American Diabetes Association suggests continuing 0.9% NaCl at a similar rate if corrected serum sodium is low in adult patients with DKA 1, 3
Once renal function is assured, the American Diabetes Association recommends adding 20-30 mEq/L potassium (2/3 KCl and 1/3 KPO4) to the infusion in adult patients with DKA 1, 2
Fluid replacement should correct estimated deficits within the first 24 hours in adult patients with DKA 1

The American Diabetes Association recommends assessing successful fluid replacement through hemodynamic monitoring, measurement of fluid input/output, and clinical examination in adult patients with DKA 1, 3
The induced change in serum osmolality should not exceed 3 mOsm/kg/h in adult patients with DKA 1
In patients with renal or cardiac compromise, the American Diabetes Association suggests monitoring serum osmolality and frequently assessing cardiac, renal, and mental status to avoid iatrogenic fluid overload 2

For patients <20 years of age, the American Diabetes Association recommends initial fluid therapy with isotonic saline (0.9% NaCl) at 10-20 ml/kg/h for the first hour 1
Initial reexpansion should not exceed 50 ml/kg over the first 4 hours in pediatric patients with DKA 1

The average adult with DKA has a total water deficit of approximately 6 liters (100 ml/kg) 1, 2, 3
Electrolyte deficits typically include sodium (7-10 mEq/kg), potassium (3-5 mEq/kg), and phosphate (5-7 mmol/kg) in adult patients with DKA 1, 3

Failure to monitor and replace potassium can lead to dangerous hypokalemia as insulin therapy begins in adult patients with DKA 1, 2
Excessive fluid administration in patients with cardiac or renal compromise can cause fluid overload 1, 3
Not correcting serum sodium for hyperglycemia may lead to inappropriate fluid selection in adult patients with DKA 1, 3