A nurse is providing discharge education to a client who had a calcium oxalate stone. Which dietary modification should the nurse include in the client's plan of care?

A. Pain relief is important in managing kidney stone pain, but potassium citrate is not primarily prescribed for this purpose.

B. Acid-base balance regulation may be one of the functions of potassium citrate, but it is not the primary purpose when prescribed to a client with renal calculus.

C. Urinary tract infection treatment is not the primary purpose of potassium citrate. While it may have some benefits in preventing certain types of urinary tract infections associated with stones, its primary purpose is not to treat infections.

D. This is the correct answer. Potassium citrate is prescribed to help dissolve certain types of kidney stones, particularly calcium oxalate stones and uric acid stones. It works by increasing the pH of the urine, making it more alkaline and less conducive to stone formation.

A. Uric acid stones may cause pain, but they do not typically present with costovertebral angle tenderness. Uric acid stones are more likely to be associated with gout and hyperuricemia.

B. Calcium oxalate stones are common and can cause pain, but they do not typically cause costovertebral angle tenderness. They are more likely to cause localized pain in the back or side.

C. This is the correct answer. Struvite stones, also known as infection stones, can cause severe pain that radiates to the back and lower abdomen. They are often associated with urinary tract infections, and the presence of an infection can lead to costovertebral angle tenderness.

D. Cystine stones are rare and are more likely to cause chronic, dull pain rather than sudden and severe pain with tenderness.