What impact does chronic kidney disease have on electrolyte balance?

• A. It has no effect on electrolyte balance
• B. It can lead to imbalances in sodium, chloride, and bicarbonate
• C. It can lead to imbalances in potassium, phosphorus, and calcium
• D. It stabilizes electrolyte levels

Answer: (C)

Chronic kidney disease (CKD) significantly affects electrolyte balance due to the kidneys' impaired ability to filter and excrete waste products and maintain homeostasis. One of the primary consequences of CKD is the alteration in the body's handling of key electrolytes, particularly potassium, phosphorus, and calcium.

As kidney function declines, the ability to excrete potassium decreases, often leading to hyperkalemia (elevated potassium levels). This can pose serious cardiovascular risks, as high potassium levels can interfere with the heart's electrical activity.

Phosphorus balance is also disrupted in CKD, primarily due to decreased renal excretion. Elevated phosphorus levels can lead to various complications, including renal osteodystrophy, where the balance of calcium and phosphorus disrupts bone health.

Calcium regulation is affected as well, largely due to the kidneys' role in converting vitamin D into its active form, which is necessary for calcium absorption from the gut. In CKD, reduced activation of vitamin D can lead to lower calcium levels and subsequent compensatory increases in parathyroid hormone (PTH), further contributing to bone and mineral disorders.

Thus, option C accurately captures the critical impact of chronic kidney disease on electrolyte imbalances related to potassium, phosphorus, and calcium,