Management of Euglycemic Diabetic Ketoacidosis

Diagnostic Confirmation

The American Diabetes Association recommends confirming the diagnosis of euglycemic diabetic ketoacidosis (euDKA) by checking arterial or venous pH (<7.3), serum bicarbonate (<15 mEq/L), and direct measurement of β-hydroxybutyrate in blood, as these are more accurate than urine ketones 1, 2
Calculate the anion gap to confirm high anion gap metabolic acidosis (typically >12 mEq/L), which is a key characteristic of euDKA 1

Alcoholic ketoacidosis (AKA) should be distinguished from euDKA, as it has a history of alcohol use, glucose ranges from mildly elevated to hypoglycemic, and can cause profound acidosis 2, 3
Starvation ketosis is another differential diagnosis, characterized by a history of poor oral intake and less severe acidosis than euDKA, with bicarbonate usually not lower than 18 mEq/L 2, 3

The American College of Physicians recommends searching aggressively for infection as a precipitating factor for euDKA, including obtaining cultures of blood, urine, and throat, and performing a chest X-ray if respiratory symptoms are present 2, 1
Consider myocardial infarction, stroke, or other acute illness as triggers for euDKA, as these can also precipitate the condition 4, 1

The American Heart Association recommends beginning with isotonic saline (0.9% NaCl) at 15-20 mL/kg/hour for the first hour, unless cardiac compromise is present, to correct fluid deficits and improve hemodynamics 3, 1
After initial volume expansion, switch to 0.45% NaCl at 4-14 mL/kg/hour if corrected serum sodium is normal or elevated, and continue 0.9% NaCl if corrected serum sodium is low 3, 1

The Endocrine Society recommends starting continuous intravenous insulin infusion at 0.1 units/kg/hour immediately, even if glucose is normal, to clear ketones and improve acidosis 1
Simultaneously add dextrose 5% to intravenous fluids from the start to prevent hypoglycemia while continuing insulin to clear ketones 5, 1
Target glucose between 150-200 mg/dL throughout treatment, and never interrupt insulin infusion when glucose falls, as this can worsen ketoacidosis 5, 1

Check potassium before starting insulin, and if K⁺ <3.3 mEq/L, hold insulin and replace potassium first to prevent hypokalemia 6
Once renal function is confirmed and potassium is adequate, add 20-30 mEq/L potassium to IV fluids (2/3 KCl and 1/3 KPO₄) to maintain serum potassium between 4-5 mmol/L throughout treatment 1

Draw blood every 2-4 hours for glucose, electrolytes, blood urea nitrogen, creatinine, osmolality, and venous pH to monitor treatment response and adjust therapy as needed 5, 1
Monitor anion gap closure and bicarbonate rise to assess resolution of ketoacidosis, and remember that ketone clearance takes longer than glucose normalization 5, 1

Once resolution criteria are met (pH >7.3, bicarbonate ≥18 mEq/L, anion gap ≤12 mEq/L, glucose <200 mg/dL), transition to subcutaneous insulin to maintain glucose control and prevent recurrence of ketoacidosis 5, 1
Administer basal insulin (long-acting or intermediate-acting) 2-4 hours before stopping IV insulin to prevent recurrence of ketoacidosis, and start multiple-dose regimen with combination of rapid/short-acting and intermediate/long-acting insulin when patient can eat 5, 1