A client with acute renal failure has a history of cardiovascular disease and is on multiple antihypertensive medications. Which antihypertensive medication class is most likely to contribute to prerenal acute renal failure?

A. Incorrect. Muscle cramps in acute renal failure are often related to electrolyte imbalances, including high potassium levels. Encouraging the consumption of potassium-rich foods would exacerbate the issue.

B. Incorrect. Muscle relaxants may not be appropriate for all clients, and the underlying cause of the muscle cramps should be addressed first.

C. Correct. Applying warm compresses to the affected muscles can help relax muscle tension and provide relief from muscle cramps.

D. Incorrect. Gentle stretching exercises may not be appropriate for a client experiencing muscle cramps, as stretching could exacerbate the discomfort.

A. Correct. A renal ultrasound is an imaging test that uses sound waves to create images of the kidneys. It can help identify kidney stones, obstructions, and other structural abnormalities in the urinary tract.

B. Incorrect. The renal ultrasound does not directly measure the glomerular filtration rate (GFR), which is typically assessed through blood tests.

C. Incorrect. A renal ultrasound does not provide information about the number and types of blood cells in the bloodstream.

D. Incorrect. While a renal ultrasound can visualize the blood vessels in the kidneys, its primary purpose is to assess kidney structure, not blood flow.