If potassium is normal or high and hyperglycemia persists after initial fluids in DKA, what is the recommended step?

If potassium is normal or high and hyperglycemia persists after initial fluids in DKA, what is the recommended step?

• A. Administer bicarbonate and stop fluids
• B. Only give glucose and wait
• C. Start insulin infusion to correct hyperglycemia and acidosis while monitoring potassium and changing IV fluids; ensure potassium replacement
• D. Hold insulin until potassium lowers

Answer: (C)

Potassium balance in DKA is dynamic: high or normal potassium at diagnosis doesn’t mean potassium isn’t depleted overall. Insulin therapy and the resolution of acidosis drive potassium back into cells, which can unmask or cause hypokalemia if we don’t replace potassium. When hyperglycemia persists after initial fluids and potassium is normal or elevated, the best step is to start an insulin infusion to lower glucose and correct acidosis, while closely monitoring potassium and providing potassium replacement as needed. Adjust IV fluids accordingly (switch to dextrose-containing fluids when glucose drops to about 200 mg/dL) and continue electrolyte checks. Hold insulin only if potassium falls below about 3.3, otherwise begin insulin with potassium replacement.

Potassium balance in DKA is dynamic: high or normal potassium at diagnosis doesn’t mean potassium isn’t depleted overall. Insulin therapy and the resolution of acidosis drive potassium back into cells, which can unmask or cause hypokalemia if we don’t replace potassium. When hyperglycemia persists after initial fluids and potassium is normal or elevated, the best step is to start an insulin infusion to lower glucose and correct acidosis, while closely monitoring potassium and providing potassium replacement as needed. Adjust IV fluids accordingly (switch to dextrose-containing fluids when glucose drops to about 200 mg/dL) and continue electrolyte checks. Hold insulin only if potassium falls below about 3.3, otherwise begin insulin with potassium replacement.