Which electrolyte abnormality is commonly seen in renal failure?

• A. Hyperkalemia
• B. Hypokalemia
• C. Hypercalcemia
• D. Hyponatremia

Answer: (A)

In renal failure, the body’s ability to remove potassium is greatly reduced, so potassium builds up in the blood. The kidneys normally filter potassium and then secrete more into the urine in the distal tubules under aldosterone’s influence. When kidney function declines, both filtration and secretion drop, leading to hyperkalemia. This imbalance is especially dangerous because it can disrupt heart rhythm and cause muscle weakness, so monitoring and managing potassium is a key part of care for patients with kidney failure. Other electrolyte abnormalities aren’t the typical pattern here; while low potassium or calcium changes can occur in certain situations, the most common and important trend in renal failure is elevated potassium.