engleski

CHEMICAL COMPOSITION OF ENCRUSTATES ON DOUBLE ”J“ URETERAL STENT IN RECURENT UROLITHIASIS

Background. Ureteral stent occlusion by encrustation is a major problem in long-term artificial urinary drainage. In this paper are demonstrated results of the investigation the physical chemical analysis of extracted encrustates to the stents for some patients with recurrent urolithiasis. Methods. We analyzed the composition of encrustates to 20 removed double J stents in patients with recurrent urolithiasis. Analysis of the encrustates composition were made by thermogravimetric analysis (Mettler TG 50) and FT-IR spectroscopy (Shimadzu 8400). Results. The results obtained were compared with encrustates compositionof the primary composition of kidney stones by patients previously excreted. Encrustates samples were taken from three different places on the stent to determine sample homogeneity, considering the diversity of environment through which the stent is situated. The results indicate composition diversity of the sample encrustated with the same stent. Analysis composition encrustates revealed struvite and carbonate hydroxyapatite as most frequent minerals. Conclusions. Based on results of analysis of the composition encrustates deposited at the stent in patients with recurrent urolithiasis we can concluded that it is not homogeneus and is not identical with the composition of primary kidney stones who is patients previously extracted.

inkrustati; kemijski sastav; transuretalne "JJ" proteze

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