In CKD, why is potassium monitoring important?

• A. Risk of hyperkalemia due to reduced excretion
• B. Potassium levels are not affected by CKD
• C. Potassium excretion increases, causing hypokalemia
• D. Potassium only matters in dialysis patients

Answer: (A)

Potassium balance depends largely on the kidneys, so when chronic kidney disease progresses and filtration declines, the body's ability to excrete potassium drops. That means potassium can accumulate, leading to hyperkalemia, which is dangerous because it can cause life-threatening heart rhythm problems even before you notice symptoms. Because CKD often interacts with medicines and dietary intake that affect potassium, regular monitoring helps catch rising levels early and allows you to adjust plans—like reviewing medications (for example ACE inhibitors, ARBs, potassium-sparing diuretics) and counseling on potassium-rich foods. Monitoring involves periodic serum potassium checks and watching for trends, with more frequent testing as kidney function worsens or when on therapies that raise potassium. If potassium becomes high, management ranges from dietary restrictions and medication adjustments to urgent treatments (such as therapies to shift potassium into cells or stabilize the heart) and, in severe cases, dialysis.