In vitro analysis of balloon cuffing phenomenon: inherent biophysical properties of catheter material or mechanics of catheter balloon deflation?

AIM: To investigates the different methods of balloon deflation, types of urinary catheters and exposure to urine media in catheter balloon cuffing.

MATERIALS AND

METHODS

Bardex®, Bard-Lubri-Sil®, Argyle®, Releen® and Biocath® were tested in sterile and E.Coli inoculated urine at 0, 14 and 28 days. Catheter deflation was performed with active deflation; passive deflation; passive auto-deflation; and excision of the balloon inflow channel. Balloon cuffing was assessed objectively by running the deflated balloon over a plate of agar and subjectively by 3 independent observers.

RESULTS

Bardex®, Argyle® and Biocath® showed greater degree of catheter balloon cuffing (p < 0.01). Active balloon deflation was the worst method (p < 0.01). The presence of infected urine media also contributed to greater balloon cuffing (p > 0.05). Linear regression model analysis confirmed time as the most significant factor.

CONCLUSION

The duration of catheters exposure, different deflation methods and types of catheters tested contributed significantly to catheter balloon cuffing (p < 0.01).