Related Experiment Video
Updated: Apr 20, 2026
An In Vitro Bladder Model of Catheter-Associated Urinary Tract Infection
Published on: June 24, 2025
[Resistance to flow of uncoated urinary catheters. Experimental study with bladder model]
1Centre de rééducation et réadaptation fonctionnelle de KERPAPE, pôle médico-technique, BP 78, 56275 Ploemeur cedex, France.
Objectives:
Evaluate the flow resistance caused by uncoated urinary catheter put during night.
Material:
Experimental synthetic bladder in vitro study measuring the flow of uncoated urinary catheter most frequently observed in the continuous nocturnal drainage with data charier and pressure (for catheters 10, 12 and 14 Ch diameter and 20, 40 and 60 cmH2O pressure). For each pressure/charier relationship, five catheters of the same type were used.
Results:
We observed that for the median flow (Qmax), two catheters with identical charier and pressure, which differed only by their brand, was not significantly different. For example, Peters(®) and Coloplast(®) Ch 14 probes and 20 cmH2O pressure (P value=0.915). Faced with the nomogram of Abrams-Griffiths (Lim and Abrams, 1995 [7]), uncoated catheters prove obstructive or partially obstructive at a higher pressure of 20 cmH2O for all those charier studied.
Conclusion:
Uncoated urinary catheter put during the night is obstructive under some data charier. Increasing charier of uncoated catheter decreases resistance to flow. It seems that not difference in drainage flow between different brands with data charier and pressure.
