During the initial treatment phase of DKA with IV insulin, which statement best describes potassium management?

• A. Potassium must be actively monitored and replaced as needed due to insulin therapy
• B. Sodium correction is the only priority
• C. Magnesium levels are the only important concern
• D. Phosphate management is the only important concern

Answer: (A)

Potassium management is the critical focus during the initial phase of DKA treatment with IV insulin because insulin drives potassium from the extracellular space into cells. In DKA, total body potassium is usually depleted from osmotic diuresis and underlying acidosis, but serum potassium can be normal or even high at presentation. As insulin is started and acidosis resolves, potassium shifts into cells, which can precipitate dangerous hypokalemia if potassium isn’t actively monitored and replaced as needed. That’s why the correct approach is to continuously monitor potassium and replace it during treatment as dictated by the current potassium level. If potassium is very low, insulin may be held and potassium given to safely raise the level; if it's moderately low to normal, potassium is provided alongside continued insulin to maintain a safe range; if potassium is high, you continue to monitor and replace as needed but may delay aggressive potassium administration until levels fall. While sodium correction and attention to magnesium or phosphate are important parts of overall DKA management, they do not carry the same immediate risk during the onset of insulin therapy as potassium does.