The dissolution of urinary catheter encrustation

Area of Science:

• Urology
• Biomaterials Science

Background:

• Urinary catheter encrustations pose a significant clinical challenge, often requiring interventions to maintain catheter patency.
• Acidic bladder washout solutions are commonly used to dissolve these encrustations.

Purpose of the Study:

• To determine the optimal volume of acidic bladder washout solution for dissolving catheter encrustations.
• To compare the efficacy of different bladder washout delivery devices.

Main Methods:

• In vitro model of a catheterized bladder used to generate urinary catheter encrustations.
• Acidic bladder washout solution (Suby G) applied and retained for 15 minutes.
• Dissolution measured by colorimetric analysis of magnesium and calcium content.

Main Results:

• No significant difference in encrustation dissolution between 50 mL and 100 mL washout volumes.
• Two sequential 50 mL washouts were significantly more effective than a single 100 mL or 50 mL washout.
• The Optiflow delivery device demonstrated effectiveness comparable to other tested devices.

Conclusions:

• 50 mL of acidic bladder washout solution is as effective as 100 mL for dissolving encrustations under laboratory conditions.
• Sequential application of 50 mL washouts enhances dissolution efficacy.
• Findings support informed decision-making in catheter care practices.