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Revista de nefrologia, dialisis y trasplante

On-line version ISSN 2346-8548


SPIVACOW, Francisco Rodolfo; DEL VALLE, Elisa Elena  and  ROJAS PEREZ, Pedro Alejandro. Hipercalciuria idiopática: diagnóstico, clasificación y tratamiento. Rev. nefrol. dial. traspl. [online]. 2021, vol.41, n.3, pp.184-191. ISSN 2346-8548.

Introduction: Idiopathic hypercalciuria is defined as urine calcium excretion greater than 220 mg/day in women and 300 mg/day in men, or greater than 4 mg/kg under regular dietary conditions. Objective: The aim of this study is to review the diagnosis, classification, and treatment of hypercalciuric patients with renal lithiasis. Methods: We enrolled 250 patients suffering from renal lithiasis and idiopathic hypercalciuria and 80 healthy subjects as control group. Lab tests were performed to diagnose renal lithiasis. Results: Although the 24-hour urine test is the gold standard to determine calciuria, in this study we propose considering the Ca/Kg >4 mg/Kg ratio or an index of >140 mg of Ca per gram urine creatinine. Regarding the different types of hypercalciuria, after following a strict diet, subjects were divided into two groups: diet-dependent and diet-independent hypercalciuria. Concerning the treatment, we suggest diuretic therapy to achieve a urine output of 2-2.5 liters per day. In the case of subjects with diet-dependent hypercalciuria, we advise an intake of 600-800 mg of calcium and a moderate reduction in animal protein and salt intake. In cases of non-response to treatment in subjects with diet-dependent hypercalciuria, thiazides, chlorthalidone, indapamide and, in some cases, bisphosphonates may help control hypercalciuria with a lower risk of lithiasis recurrence and healthier bones. Conclusions: We believe it is important to consider not only the methods to diagnose hypercalciuria but also its classification to provide a better treatment.

Keywords : idiopathic hypercalciuria; therapy; diagnosis; classification; calcium; calciuria; nephrolithiasis.

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