Resumo

SPIVACOW, Francisco R; NEGRI, Armando L  e  DEL VALLE, Elisa E. Long term effect of thiazides on bone mass in women with hypercalciuric nephrolithiasis. Rev. nefrol. dial. transpl. [online]. 2013, vol.33, n.4, pp.180-187. ISSN 2346-8548.

Background: Decreased bone mineral density and increased prevalence of bone fractures have been found in patients with idiopathic hypercalciuria. It is not yet clear if thiazide treatment prevent these events. Methods: We retrospectively evaluated bone mass and biochemical markers of bone turnover in response to thiazide therapy in 52 consecutive female patients with idiopathic hypercalciuria and nephrolithiasis. Patients were divided in two subgroups according to their menopausal status: 25 were pre-menopausal (Group I) and 27 were postmenopausal (Group II). Results: Osteoporosis was found in 12 patients at baseline, 9 at the lumbar spine and 6 at the femoral neck. Two were pre-menopausal and 10 were postmenopausal. Patients with osteoporosis were analyzed separately (Group III). There was a significant and persistent reduction in urinary calcium with preservation of bone mass in all the groups after a median follow-up of 51 months. Few adverse effects were found using low doses of hydrochlorothiazide / amiloride. Only in the group III we found a statistically significant an increase in BMD at the lumbar spine of 9.5% and an increase in BMD at femoral neck of 4.4% that did not reach statistical significance. Conclusions: We conclude that correction of hypercalciuria during long term treatment with low-dose hydrochlorothiazide//amiloride in women with nephrolithiasis prevents bone loss and in those with osteoporosis can lead to a significant increa se in bone mineral density at the lumbar spine. Few adverse effects were seen during treatment and no interruption of therapy was necessary.

Palavras-chave : Thiazides; Bone mass; Hypercalciuria; Nephrolithiasis.

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