If a patient’s NG tube requires potassium, what should the nurse do first?

• A. Check patients electrolyte result
• B. Administer potassium immediately
• C. Check blood pressure
• D. Check temperature

Answer: (A)

Always assess before acting. When an NG tube needs potassium, the first step is to check the patient’s current electrolyte status by reviewing the latest serum potassium result and the physician’s order. Potassium replacement can be dangerous if potassium is already normal or high, or if kidney function limits clearance. The decision to replace should be based on lab data and a standing order, not on routine timing or assumption. Once the labs show a deficit and an order exists, you would proceed with the prescribed method, ensuring proper preparation and administration through the NG tube with appropriate flushing and monitoring. Checking blood pressure or temperature does not determine the need for potassium, and giving potassium immediately without verifying labs and orders could harm the patient.