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SYMPOSIUM
Year : 2010  |  Volume : 26  |  Issue : 4  |  Page : 523-530

Nutritional aspect of nephrolithiasis


Department of Nephrology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow - 260 014, India

Correspondence Address:
R K Sharma
Department of Nephrology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow - 260 014
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-1591.74451

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Nephrolithiasis is associated with a variety of abnormalities in urinary composition. These abnormal urinary risk factors are due to dietary indiscretions, physiological-metabolic disturbances or both. Stone disease is morbid and costly, and the recurrence rates may be as high as 30-50% after 5 years. Efforts to prevent stone formation are, therefore, essential. Dietary factors play an important role in kidney stone formation. Tailored dietary recommendations based on metabolic evaluation should be offered to patients for the prevention of recurrence of stone formation. Dietary intervention and subsequent evaluations of therapeutic efficacy should be based on results from multiple 24-h urine collections. Urine flow of >1 ml/kg/h almost eliminates the risk of supersaturation for calcium oxalate, calcium phosphate and uric acid, thus protecting from the formation of corresponding kidney stones. In patients with cystenuria, the required urine flow may even be higher and, in cases such as primary xanthinuria, high fluid intake is required. Milk intake in these patients should be within the RDA of calcium and protein. In children, recommendation of a high fluid intake has only limited success. Nevertheless, each patient should be advised about adequate fluid intake to increase urine volume in accordance with body size. Although children with hypocitraturia may benefit from therapeutic agents that raise the urine citrate concentration, all children bearing residual fragments should be counseled on adequate fluid intake along with potassium citrate treatment to prevent stone regrowth or formation.


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