Bladder pressure sensors in an animal model

Area of Science:

• Biomedical Engineering
• Urology
• Neuroscience

Background:

• Urinary incontinence, particularly due to detrusor hyperreflexia, presents a significant clinical challenge.
• Current treatments may lack on-demand control.
• Detecting bladder pressure changes could enable targeted interventions like pudendal nerve electrostimulation.

Purpose of the Study:

• To evaluate the reaction of the bladder wall to different sensor implant locations.
• To assess the feasibility of using implanted sensors for potential on-demand inhibition of urinary incontinence.

Main Methods:

• Twelve goats underwent sensor implantation in various bladder wall locations.
• Group 1 (n=8) received real sensors on the peritoneal surface, between peritoneum and muscle, and near the cervix.
• Group 2 (n=4) received dummy sensors between mucosal and muscular layers.
• Follow-up included urodynamic studies, radiographic imaging, and urine cultures for up to 25 months.

Main Results:

• Sensors placed between the peritoneum and muscular layer in Group 1 yielded the most promising outcomes.
• In Group 2, a significant majority (11 of 12) of dummy sensors eroded.
• No major complications were reported, suggesting surgical feasibility.

Conclusions:

• Implantation of sensors within the bladder wall is a feasible approach.
• Specific placement, such as between the peritoneum and muscular layer, appears optimal for sensor function and biocompatibility.
• This research supports the potential for sensor-guided, on-demand management of detrusor hyperreflexia and urinary incontinence.