Prior to administering potassium chloride, when the serum potassium is 6.5 mEq/L, what is the most important intervention for the nurse to implement?

• A. Document the potassium level in the chart.
• B. Hold the dose and contact the healthcare provider to report the elevated potassium level.
• C. Increase the dose to counteract the high potassium.
• D. Administer a potassium-eliminating diuretic.

Answer: (B)

Managing hyperkalemia risk is the key idea here. A serum potassium of 6.5 mEq/L indicates dangerous elevation that can affect cardiac conduction and cause life-threatening arrhythmias. Therefore the most important action is to hold the potassium chloride dose and immediately contact the healthcare provider to report the elevated level and obtain orders for treatment. Merely documenting the result isn’t enough, and increasing the dose would worsen hyperkalemia. Giving a potassium-eliminating diuretic without explicit orders could be unsafe or ineffective, especially if renal function is compromised. Holding the infusion and seeking clinician guidance allows for appropriate interventions to lower potassium and to adjust ongoing treatment as needed.