Management of Euglycemic Diabetic Ketoacidosis

Diagnosis and Assessment

The American Diabetes Association recommends diagnosis of euglycemic diabetic ketoacidosis (euDKA) requires the presence of metabolic acidosis (pH <7.3), serum bicarbonate <15 mEq/L, and moderate ketonemia or ketonuria, despite blood glucose levels being <250 mg/dL 2
Direct measurement of β-hydroxybutyrate in blood is the preferred method for monitoring DKA, as the nitroprusside method only measures acetoacetic acid and acetone 2, 3
Evaluate for precipitating factors such as infection, myocardial infarction, stroke, or medication effects 2

Aggressive fluid resuscitation with isotonic saline (0.9% NaCl) at a rate of 15-20 mL/kg/hour is recommended to restore circulatory volume and tissue perfusion 2, 1
Continuous intravenous insulin infusion at 0.1 units/kg/hour is recommended, even though glucose levels are normal or near-normal 1, 3
Adding dextrose to intravenous fluids when glucose is <200-250 mg/dL while continuing insulin infusion is critical to resolve ketosis 1, 3

The American Diabetes Association recommends that after initial volume expansion with isotonic saline, subsequent fluid choice depends on hydration status and electrolyte levels 4
Generally, 0.45% NaCl infused at 4-14 mL/kg/hour is appropriate if corrected serum sodium is normal or elevated; 0.9% NaCl at a similar rate if corrected serum sodium is low 4
Fluid replacement should correct estimated deficits within the first 24 hours 4

Insulin infusion should be continued until resolution of ketoacidosis (pH >7.3, serum bicarbonate ≥18 mEq/L, and anion gap ≤12 mEq/L) regardless of glucose levels 2, 3
If plasma glucose does not fall by 50 mg/dL from initial value in the first hour, check hydration status; if acceptable, the insulin infusion may be doubled every hour until a steady glucose decline between 50-75 mg/h is achieved 5
For mild euDKA in stable patients, subcutaneous rapid-acting insulin analogs combined with aggressive fluid management can be as effective as intravenous insulin 2

Include 20-30 mEq/L potassium (2/3 KCl and 1/3 KPO₄) in the infusion once renal function is assured 4
Monitor potassium levels closely, as insulin administration can cause hypokalemia; maintain serum K⁺ between 4-5 mmol/L 2, 3
Bicarbonate administration is generally not recommended for DKA patients with pH >7.0 2, 1

Draw blood every 2-4 hours to determine serum electrolytes, glucose, blood urea nitrogen, creatinine, osmolality, and venous pH 5, 3
Follow venous pH (typically 0.03 units lower than arterial pH) and anion gap to monitor resolution of acidosis 5, 3
Remember that ketonemia typically takes longer to clear than hyperglycemia 5, 3

DKA resolution requires glucose <200 mg/dL, serum bicarbonate ≥18 mEq/L, venous pH >7.3, and anion gap ≤12 mEq/L 2, 3
Once DKA is resolved, if the patient is NPO, continue intravenous insulin and fluid replacement, and supplement with subcutaneous regular insulin as needed 5, 3

When transitioning to subcutaneous insulin, administer basal insulin 2-4 hours before stopping the intravenous insulin to prevent recurrence of ketoacidosis 2, 3
When the patient is able to eat, start a multiple-dose schedule using a combination of short/rapid-acting and intermediate/long-acting insulin 5, 3

Premature termination of insulin therapy before complete resolution of ketosis can lead to recurrence of DKA 2, 1
Interruption of insulin infusion when glucose levels fall is a common cause of persistent or worsening ketoacidosis 3
Inadequate carbohydrate administration alongside insulin in euDKA can perpetuate ketosis 1
Failure to monitor and replace electrolytes can lead to complications 1