If an NG tube requires potassium, what is the nurse's first action?

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

Answer: (D)

Potassium is essential for maintaining normal heart rhythm and muscle function. When a patient with an NG tube needs potassium, the priority is to correct that deficit so the heart and muscles can function safely. Administering potassium via the NG tube provides the direct treatment needed to restore the electrolyte balance, preventing dangerous complications such as arrhythmias and weakness. After starting the replacement, you would confirm there’s an order and then monitor the patient’s potassium level, vital signs, and overall response to the therapy. The other steps—like checking a value or taking vital signs—are important safety checks, but the action that directly addresses the deficiency is giving the potassium as prescribed.