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Memorias del Instituto de Investigaciones en Ciencias de la Salud

versión On-line ISSN 1812-9528

Resumen

GUILLEN, R; PISTILLI, N; RAMIREZ, A  y  ECHAGUE, G. Morphological analysis of kidney stones from Instituto de Investigaciones en Ciencias de la Salud patients in 2007. Mem. Inst. Investig. Cienc. Salud [online]. 2008, vol.6, n.2, pp.11-17. ISSN 1812-9528.

ABSTRACT Kidney stones are formed when the concentration of urine components reaches such levels that crystallization is induced. Although clinical symptoms of all types of stones are similar, they differ in the composition, pathogenesis and treatment. Morphoconstitutional classification of kidney stones is made by applying mineralogical and morphological criteria, useful to classify them in different morphological types, each one with a dominant composition and a probable etiological cause of the stone formation. This retrospective study describes the results of the analysis of kidney stones from 50 patients made in 2007, applying criteria of morphoconstitutional classification. Each patient received his results respecting confidentiality. The more frequent types were IIa located in the nucleus (44.4%) and Ia in intermediate and superficial strata (37.7% y 44.1%). Type IVa1 was present in all strata with percentages from 13 to 31.1%. These morphological types are related to hypercalciuria, hyperoxaluria and urinary infections respectively. The presence of 2 o more morphological types was observed in 42 patients. The association of Ia+IVa1 was present in 45% of bifactorial kidney stones. This is the first morphological study of kidney stones in Paraguay, without sending samples abroad. The analysis of kidney stones is important not only to find the cause of the lithiasis but also to select the appropriate treatment.

Palabras clave : kidney stones.

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