A nurse is planning care for a client who has been diagnosed with nephrolithiasis. Which of the following is most important to include in the client’s care plan?

Choice A reason: Limiting protein intake is not a primary intervention for nephrolithiasis. High protein diets may increase uric acid stone formation, but the focus is on hydration to dilute urine. Excessive protein restriction can lead to malnutrition without directly addressing stone prevention, making it less critical than fluid intake. Choice B reason: Encouraging 3 L of fluid daily is critical for nephrolithiasis, as high fluid intake dilutes urine, reducing the concentration of stone-forming substances like calcium oxalate or uric acid. This promotes stone passage and prevents new stone formation, making it the most important intervention to manage and prevent recurrence. Choice C reason: Prophylactic antibiotics are not routinely indicated for nephrolithiasis unless an infection is present. Stones can predispose to infections, but antibiotics are reserved for confirmed cases. Unnecessary use risks antibiotic resistance and side effects, making this intervention less relevant compared to hydration for stone prevention. Choice D reason: Restricting calcium to 800 mg daily is not recommended, as dietary calcium binds oxalate in the gut, reducing stone formation. Low calcium intake may increase oxalate absorption, promoting stones. Fluid intake is more critical, as it directly dilutes urine and prevents stone precipitation.