Sustained release varnish containing chlorhexidine for prevention of biofilm formation on urinary catheter surface: in vitro study.

Background And Purpose: Biofilms on the surfaces of urinary catheters are among the pivotal factors for recurrent and persistent infections in urology. Many techniques have been investigated and applied for eradication of these biofilms--but with no full success. The aim of this study was to examine the effect of sustained release medicated varnish, releasing chlorhexidine, on the formation of biofilm on the urinary catheter surface in an in-vitro model.