Indwelling Stent Discoloration Project

Examining the Underlying Factors That Cause Ureteral Stent Discoloration in Japanese and Canadian Ureteral Stents

The aim of this study is to identify the root cause for the significant discolouration of Boston Scientific Percuflex based stents.

The aim of this study is to identify the root cause for the significant discolouration of Boston Scientific Percuflex based stents observed in some patients, particularly those from Japan. We will also test and compare them to stents from Canadian patients. Furthermore, we will determine whether the discolouration promotes bacterial adhesion and/or encrustation of the stent.

Inclusion Criteria:

• Patient is at least 19 years of age (Vancouver, British Columbia, Canada - for Japan different age limit as applicable)
• Patient has indwelling ureteral stent

Exclusion Criteria:

• Pregnancy
• Positive Urine Culture
• Active cancer
• Recurrent urinary infections
• Gross hematuria
• Inability to provide informed consent
• Physician/Surgeon refuses to enter patient into study