Assessment of Encrustations on Polyurethane Ureteral Stents

Abstract

Calcium oxalate is the predominant type of encrustation on ureteral catheters in stone formers. Prevention of heavy encrustation should be directed to therapeutic measures concerning calcium oxalate lithiasis and development of new materials by the medical industry that are less prone to encrustation.

The distribution of crystalline material in obstructed stents—In need for intra‐luminal surface modification?

“…In 23 of the 34 analyzed mineral deposits (68%), multi‐phase mineral parageneses occurred; the compositions found are in accordance to results of investigations of encrustations on urinary tract biomaterials reviewed in Refs. 15 and 16 (Table IV).…”

Degradation and antibacterial properties of magnesium alloys in artificial urine for potential resorbable ureteral stent applications

“…Ureteral stents facilitate the flow of urine from the kidney to the bladder in blocked or wounded ureter ducts . Although currently used ureteral stents are effective in treating blockages postoperatively, they present three major problems: (1) infection due to the accumulation of bacteria; (2) encrustation due to mineral deposition by bacteria; and (3) complications and/or severe discomfort during stent removal due to encrustation . These problems are directly or indirectly induced by bacterial growth and proliferation on stent materials.…”

“…(3) complications and/or severe discomfort during stent removal due to encrustation. [9][10][11] These problems are directly or indirectly induced by bacterial growth and proliferation on stent materials.…”

Caractéristiques des incrustations des endoprothèses urétérales chez les patients lithiasiques

“…que les endoprothèses urétérales mises en place chez des sujets lithiasiques s'incrustaient d'avantage et plus rapidement que celles implantées chez les patients non lithiasiques. Bithelis et al[7] qui ont analysé par spectrophotométrie infrarouge les incrustations de 40 sondes, ont rapporté que la whewellite était le composant le plus courant des incrustations chez les patients lithiasiques (n = 30). Nos résultats confirment ces données sur 658 patients : en effet, l'oxalate de calcium, notamment sous sa forme monohydratée (whewellite) était le constituant le plus fréquent.…”