A nurse is caring for a client with a history of recurrent kidney stones. Which of the following instructions should the nurse include in the client's discharge teaching to help prevent 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.

A. This statement is not correct. If a client has calcium oxalate stones, they should limit foods high in oxalate, such as spinach and nuts, to reduce the risk of stone formation.

B. This is the correct answer. Calcium oxalate stones are the most common type of kidney stone. Reducing dietary calcium intake can help prevent the formation of calcium oxalate stones. However, it is important to note that not all clients with kidney stones should reduce their calcium intake, as calcium is essential for bone health and other bodily functions.

C. Avoiding foods high in purines is more relevant to the prevention of uric acid stones, not calcium oxalate stones.

D. While reducing sodium and processed foods can be beneficial for overall health, it is not a specific dietary modification for preventing calcium oxalate stones.