PMID: 9178735Jul 1, 1997Paper

Assessment of urinary tract biomaterial encrustation using a modified Robbins device continuous flow model

Journal of Biomedical Materials Research
M M TunneySean P Gorman

Abstract

Encrustation of biomaterials employed in the urinary tract remains a major problem resulting in obstruction or blockage of catheters and stents. Therefore, resistance to encrustation is a desirable feature of biomaterials employed in such devices. The novel assessment of biomaterial encrustation employing a continuous flow model based on a modified Robbins device is described. Artificial urine was used in conjunction with 5% CO2 to simulate the physiological environment within the upper urinary tract. The widely used urinary device biomaterials, silicone and polyurethane, were investigated in the model for hydroxyapatite and struvite encrustation. Scanning electron microscopy, energy dispersive X-ray analysis, and atomic absorption spectroscopy all showed that silicone was less prone to encrustation than polyurethane and that hydroxyapatite deposition was predominant on both surfaces. The model has the advantage that a large number of biomaterials may be investigated simultaneously because several Robbins devices may be placed in parallel. The model is recommended for comparative evaluation of biomaterial candidates for use in urinary tract devices.

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Citations

Dec 23, 2004·Urological Research·Greg L ShawChristopher Fry
Feb 14, 2006·Nature Clinical Practice. Urology·Ben H Chew, John D Denstedt
Jan 16, 2010·Journal of Endourology·Nandakumar VenkatesanMukesh Doble
Feb 13, 2009·Journal of Applied Microbiology·A MouraJ Azeredo
Jan 22, 2010·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Brendan F GilmoreSean P Gorman
Jun 16, 2004·Journal of Controlled Release : Official Journal of the Controlled Release Society·R K MalcolmJ Cuddy
Dec 24, 2014·Nature Reviews. Urology·Dirk LangeBen H Chew
Jan 26, 2012·Journal of Biomaterials Applications·Evi LippensRia Cornelissen
Dec 8, 2000·Journal of Endourology·S G AntimisiarisG A Barbalias
Dec 24, 2010·Journal of Biomaterials Science. Polymer Edition·Nele De SmetEtienne Schacht
May 10, 2006·Expert Review of Medical Devices·Ben H ChewJohn D Denstedt
Mar 16, 2007·Expert Review of Medical Devices·Turlough M HamillSean P Gorman
Dec 17, 1997·Journal of Biomaterials Applications·S P Gorman, M M Tunney

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