An in vitro comparison of urease‐induced encrustation of JJ stents in human urine

Abstract

Objective To report the results of a comparative study higher levels of calcium and magnesium salts were obtained after acidic dissolution. There were no differof in vitro encrustation of five different types of JJ stents in human urine.ences in crystal deposition among the remaining stents. Materials and methods Samples of five JJ stents (polyurethane, silicone, Percuflex, C-Flex and hydrogel-coated Conclusion Hydrogel-coated stents have an higher risk of becoming encrusted in vitro than do uncoated stents C-Flex) were immersed for 24 h at 37°C in fresh human urine supplemented with urease, and the surface photomade of the same substrate polymer or made of different materials. These results emphasize the need graphed and dried. The crystals formed on the stents were dissolved in hydrochloric acid and the calcium for the regular follow-up of patients with hydrophilic stents in place. and magnesium concentrations determined. Results Large crystals were deposited on the surface of

Heparin Coating on Ureteral Double J Stents Prevents Encrustations: An in Vivo Case Study

“…A silver coating showed high antibacterial activity in vitro but was ineffective in vivo; 8,9 antibiotic impregnation reduced bacterial colonization both in vitro and in vivo, but the ideal antibiotic has yet to be found. 7,10 Interesting results were found with the use of triclosan by Chew and associates in vitro, 11 and Desgrandchamps and colleagues 17 reported a study in which hydrogel coatings reduced bacterial adhesion, but found a high degree of encrustation when used in vitro.…”

Detection of icaA, icaD genes and biofilm production by Staphylococcus aureus and Staphylococcus epidermidis isolated from urinary tract catheterized patients

“…Microbial biofilms are considered the major problem posed to catheterized patients because they cause chronic infections which are difficult to treat, lead to longer hospitalization time, and can result in much higher treatment costs [2]. Biofilm formation is regulated by expression of polysaccharide intracellular adhesion (PIA), which mediates cell to cell adhesion and is the gene product of icaADBC [3].…”

Bacterial biofilm formation on urologic devices and heparin coating as preventive strategy

“…Significantly greater amounts of both antibiotics were absorbed onto the biofilm than to the stent surface [15]. It was also demonstrated that ciprofloxacin concentrations on biofilms surrounding urinary stents were significantly higher than ofloxacin concentrations [5,10,16,17]. Other studies showed that ciprofloxacin and ofloxacin might prevent microbial adhesion and biofilm formation for a short period of time [1,13,[18][19][20][21].…”