Which statement about potassium in diabetic ketoacidosis is accurate?

Which statement about potassium in diabetic ketoacidosis is accurate?

• A. Potassium remains high throughout treatment
• B. Potassium never needs monitoring
• C. Insulin therapy alone will raise K+ to dangerous levels
• D. Hyperkalemia is expected initially, but total body potassium is depleted

Answer: (D)

In DKA, potassium balance is paradoxical: the serum level can be high or normal at presentation, while the total body potassium is actually depleted. The acidosis and lack of insulin cause potassium to shift out of cells into the extracellular space, which raises or maintains the serum potassium despite a true deficit in total body potassium. At the same time, losses from osmotic diuresis, vomiting, and reduced intake deplete potassium stores. This is why initiating treatment with fluids and insulin will move potassium back into cells and can cause the serum potassium to drop rapidly, risking hypokalemia if you don’t replace potassium appropriately. So the accurate statement is that hyperkalemia is common initially, but total body potassium is depleted, requiring careful monitoring and replacement during treatment. Other options don’t fit: potassium often does not stay elevated throughout treatment; initiating insulin drives potassium into cells rather than raising it, and potassium does require monitoring during therapy.

In DKA, potassium balance is paradoxical: the serum level can be high or normal at presentation, while the total body potassium is actually depleted. The acidosis and lack of insulin cause potassium to shift out of cells into the extracellular space, which raises or maintains the serum potassium despite a true deficit in total body potassium. At the same time, losses from osmotic diuresis, vomiting, and reduced intake deplete potassium stores.

This is why initiating treatment with fluids and insulin will move potassium back into cells and can cause the serum potassium to drop rapidly, risking hypokalemia if you don’t replace potassium appropriately. So the accurate statement is that hyperkalemia is common initially, but total body potassium is depleted, requiring careful monitoring and replacement during treatment.

Other options don’t fit: potassium often does not stay elevated throughout treatment; initiating insulin drives potassium into cells rather than raising it, and potassium does require monitoring during therapy.