Urease-induced precipitation of phosphate salts in vitro on indwelling catheters made of different materials.
The urease-induced precipitation of phosphate salts on indwelling catheters was studied in an experimental in vitro model. The precipitation was strongly pH-related and was much higher in synthetic urine than in human urine. In the latter, it was significantly lower on silicone catheters than on latex catheters, including those with a hydrophilic coating. The precipitation on silicone catheters that had been in situ was not increased as compared with that on unused catheters, in contrast to latex catheters with a hydrophilic coating, among which the precipitation on used catheters was higher.
Hedelin
H
H
Department of Urology, Sahlgrenska sjukhuset, University of Göteborg, Sweden.
Grenabo
L
L
Pettersson
S
S
D002408:Catheters, Indwelling; D011232:Chemical Precipitation; D006801:Humans; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D007840:Latex; D010710:Phosphates; D011138:Polytetrafluoroethylene; D011143:Polyvinyl Chloride; D012828:Silicones; D014510:Urease / Q000494:pharmacology*; D014546:Urinary Catheterization / Q000295:instrumentation*; D014556:Urine
D007840:Latex; D010710:Phosphates; D012828:Silicones; D011138:Polytetrafluoroethylene; D011143:Polyvinyl Chloride; D014510:Urease