NCLEX Trainer Test 9 Related

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The nurse is caring for a client with a history of heart failure who is receiving furosemide (Lasix) 40 mg PO daily. Which of the following laboratory results would be of GREATest concern to the nurse?

  • A. Potassium 3.2 mEq/L.
  • B. Sodium 138 mEq/L.
  • C. Creatinine 1.0 mg/dL.
  • D. Glucose 100 mg/dL.
Correct Answer: A

Rationale: Furosemide, a loop diuretic, can cause hypokalemia, and a potassium level of 3.2 mEq/L is low, increasing the risk of arrhythmias in heart failure. Options B, C, and D are normal: sodium 138 mEq/L, creatinine 1.0 mg/dL, and glucose 100 mg/dL do not require immediate action.