A nurse is caring for a client with end-stage renal failure. For which electrolyte imbalance should the nurse monitor?

Choice A reason: Clients with end-stage renal failure more commonly experience hypocalcemia rather than hypercalcemia due to impaired vitamin D activation and phosphate retention. Therefore, hypercalcemia is not the primary electrolyte concern. Choice B reason: Hypokalemia is less common in end-stage renal failure because the kidneys are unable to excrete potassium effectively. Potassium levels tend to rise rather than fall in this condition. Choice C reason: Hyperkalemia is a major and life-threatening complication of end-stage renal failure. Impaired renal excretion leads to potassium accumulation, increasing the risk of cardiac dysrhythmias and cardiac arrest. Close monitoring of potassium levels is essential. Choice D reason: Hypomagnesemia is not the most common electrolyte imbalance in end-stage renal failure. Magnesium levels are more likely to be normal or elevated due to decreased renal excretion, making this option less likely.