The nurse is caring for a child with acute renal failure. Which clinical manifestation should the nurse recognize as a sign of hyperkalemia?
Correct Answer: D
Rationale: Hyperkalemia is a condition characterized by elevated levels of potassium in the blood. This can have serious effects on the heart, leading to cardiac arrhythmias which can be life-threatening. In acute renal failure, the kidneys are not able to properly regulate potassium levels in the blood, leading to a potential buildup of potassium, resulting in hyperkalemia. The nurse should recognize cardiac arrhythmias as a critical sign of hyperkalemia in a child with acute renal failure and take prompt action to address this electrolyte imbalance. Dyspnea, seizure, and oliguria are not typically directly correlated with hyperkalemia.