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Updated: May 10, 2026
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Urinary Bladder Distention Evoked Visceromotor Responses as a Model for Bladder Pain in Mice
Published on: April 27, 2014
Estimation of bladder volume from afferent neural activity
Summary
This study introduces a novel method for estimating bladder volume using nerve signals, crucial for improving neurostimulator efficacy in treating neurogenic bladder syndrome. This closed-loop system enhances bladder control and minimizes neural damage.
Area of Science:
- Biomedical Engineering
- Neuroscience
- Urology
Background:
- Neurogenic bladder syndrome causes urinary dysfunction, often managed with implanted neurostimulators.
- Closed-loop systems require real-time feedback to optimize neurostimulator function and prevent neural tissue damage.
- Current systems lack precise bladder volume monitoring, limiting efficacy.
Purpose of the Study:
- To develop and validate a method for real-time bladder volume estimation.
- To enable closed-loop control of neurostimulators for improved neurogenic bladder treatment.
- To enhance implant efficacy and minimize adverse effects of continuous electrical stimulation.
Main Methods:
- Utilized primary afferent activity from bladder mechanoreceptors in anesthetized rats.
- Developed a method for real-time estimation of bladder volume and pressure.
- Validated the method using acute experimental data and statistical correlation analysis.
Main Results:
- Qualitatively estimated three bladder fullness states in 100% of trials with high correlation (Spearman's r ≥ 0.6).
- Quantitatively estimated bladder volume with a mean error of 5.8 ±3.1%.
- Successfully quantified both phasic and tonic bladder responses during different measurement conditions.
Conclusions:
- Real-time bladder volume estimation from mechanoreceptor activity is feasible.
- This method supports the development of closed-loop neurostimulator systems for neurogenic bladder.
- The approach offers potential for improved treatment efficacy and reduced neural complications.
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