A client asks the nurse about the role of diabetes in the development of chronic renal failure. What is the nurse's best response?

A. Incorrect. The volume of urine produced in 24 hours is measured through a different test called the 24-hour urine collection, not the GFR test.

B. Incorrect. The GFR test does not assess blood glucose levels; it is primarily used to evaluate kidney function.

C. Correct. The GFR test measures how well the kidneys are filtering waste and fluids from the blood. It is an important indicator of kidney function and is commonly used to stage chronic renal failure.

D. Incorrect. The GFR test does not specifically measure the excretion of potassium and sodium in the urine; instead, it focuses on overall kidney function and filtration rate.

A. Incorrect. Applying a heating pad may provide temporary relief for muscle cramps, but it does not address the underlying cause.

B. Correct. Muscle cramps in clients with chronic renal failure can be caused by dehydration and electrolyte imbalances. Encouraging the client to increase fluid intake can help alleviate muscle cramps and maintain adequate hydration.

C. Incorrect. While calcium supplements may be prescribed in certain situations, they are not the first-line intervention for muscle cramps in chronic renal failure.

D. Incorrect. Educating the client about potassium-rich foods is important for managing potassium levels, but it is not the priority in this situation. Muscle cramps are more likely related to fluid and electrolyte imbalances rather than potassium intake.