Which electrolyte abnormality is most concerning and should be monitored during DKA treatment?

Which electrolyte abnormality is most concerning and should be monitored during DKA treatment?

• A. Hypernatremia
• B. Hypophosphatemia
• C. Hyperkalemia
• D. Hypokalemia

Answer: (D)

Potassium balance is the priority when treating diabetic ketoacidosis. Although serum potassium may be high at presentation because acidosis and insulin deficiency push potassium out of cells, the total body potassium is actually depleted from osmotic diuresis and vomiting. Once you start insulin therapy and correct acidosis, potassium shifts back into cells, which can cause a rapid and dangerous drop in serum potassium. That makes hypokalemia the most concerning electrolyte change to monitor during treatment, since severe low potassium can trigger life-threatening arrhythmias and profound muscle weakness. Monitor potassium levels frequently (every 2–4 hours) and be ready to replace potassium early. If potassium is below 3.3 mEq/L, hold insulin and give potassium until it rises above that threshold; once potassium is above 3.3, you can continue insulin and aim to maintain potassium around 4–5 mEq/L. Typically, IV fluids used for rehydration add potassium (often 20–30 mEq/L) to keep the serum level in a safe range. While other electrolyte shifts (like phosphate) can occur, the immediate priority is preventing hypokalemia during the course of treatment.

Potassium balance is the priority when treating diabetic ketoacidosis. Although serum potassium may be high at presentation because acidosis and insulin deficiency push potassium out of cells, the total body potassium is actually depleted from osmotic diuresis and vomiting. Once you start insulin therapy and correct acidosis, potassium shifts back into cells, which can cause a rapid and dangerous drop in serum potassium. That makes hypokalemia the most concerning electrolyte change to monitor during treatment, since severe low potassium can trigger life-threatening arrhythmias and profound muscle weakness.

Monitor potassium levels frequently (every 2–4 hours) and be ready to replace potassium early. If potassium is below 3.3 mEq/L, hold insulin and give potassium until it rises above that threshold; once potassium is above 3.3, you can continue insulin and aim to maintain potassium around 4–5 mEq/L. Typically, IV fluids used for rehydration add potassium (often 20–30 mEq/L) to keep the serum level in a safe range. While other electrolyte shifts (like phosphate) can occur, the immediate priority is preventing hypokalemia during the course of treatment.