Nutrition HESI Practice Exam Related

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The nurse is reviewing laboratory results on a client with acute renal failure. Which one of the following should be reported immediately?

  • A. Blood urea nitrogen 50 mg/dl
  • B. Hemoglobin of 10.3 g/dl
  • C. Venous blood pH 7.30
  • D. Serum potassium 6 mEq/L
Correct Answer: D

Rationale: A serum potassium level of 6 mEq/L indicates hyperkalemia, which can be life-threatening and requires immediate intervention. Hyperkalemia can lead to dangerous cardiac arrhythmias and must be addressed promptly. The other options are not as urgent. A blood urea nitrogen level of 50 mg/dl may indicate kidney dysfunction but does not require immediate intervention. Hemoglobin of 10.3 g/dl may suggest anemia, which needs management but is not an immediate threat. A venous blood pH of 7.30 may indicate acidosis, which is concerning but not as acutely dangerous as hyperkalemia.