Management of Calcium Stones in Urine

Initial Evaluation and Testing

Metabolic testing should include one or two 24-hour urine collections obtained on a random diet to identify specific risk factors and guide targeted therapy, as recommended by The Journal of Urology 1, 2
Stone analysis should be performed at least once to confirm calcium stone composition, according to Praxis Medical Insights 3

Increase fluid intake to achieve urine volume of at least 2.5 liters daily, which is critical for stone prevention, as recommended by The Journal of Urology 1, 2, 4
Maintain normal dietary calcium intake of 1,000-1,200 mg per day, as dietary calcium has been shown to reduce stone recurrence by 51% compared to low calcium diets, according to The Journal of Urology 1, 2, 4
Limit sodium intake to 2,300 mg daily to reduce urinary calcium excretion, as recommended by The Journal of Urology 1, 2, 4

Thiazide diuretics are recommended for patients with high or relatively high urine calcium and recurrent calcium stones, as they reduce urinary calcium excretion and stone recurrence, according to The Journal of Urology 5, 4
Potassium citrate therapy is recommended for patients with low or relatively low urinary citrate, as it is preferred over sodium citrate, according to The Journal of Urology 5, 4

Restricting dietary calcium can paradoxically increase stone risk by increasing urinary oxalate, as warned by The Journal of Urology and Praxis Medical Insights 1, 4
Using sodium citrate instead of potassium citrate can increase urinary calcium, as cautioned by The Journal of Urology and Praxis Medical Insights 5, 4

Increasing fruit and vegetable intake can provide alkali and reduce calcium excretion in patients with calcium phosphate stones, according to the Kidney International 6
Dietary maneuvers to decrease urinary calcium, such as sodium restriction, adequate calcium intake, and limited animal protein, can help reduce calcium phosphate stone recurrence, as noted in the Kidney International 6

Elevated calcium phosphate saturation indicates a risk for calcium phosphate crystallization, which increases with higher urine pH, as reported in the Kidney International 6
Hyperphosphaturia contributes to calcium phosphate stone risk, and dietary modifications can help reduce this risk, according to the Kidney International 6