Which action is essential before starting IV therapy that includes potassium to ensure patient safety?

• A. Confirm urine output
• B. Check arterial blood gases
• C. Review neck vein fullness
• D. Verify serum potassium value in the chart

Answer: (D)

Verifying the serum potassium level in the chart is essential before starting IV potassium therapy. Potassium administration is high-stakes because too much potassium can cause dangerous heart rhythm problems, while too little won’t correct a deficit. Checking the current potassium value tells you whether replacement is needed, and if so, guides the correct dose and rate and helps determine if it’s safe to proceed given the patient’s renal function and overall status. The other checks—urine output, arterial blood gases, and neck vein fullness—provide important context about fluid balance and overall status, but they don’t directly confirm that it’s safe to administer potassium or indicate the exact need and dosing.