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Distributed pressure sensors for a urethral catheter
Summary
A new flexible sensor strip for urethral catheters measures pressure during urodynamic testing. This innovation aids in diagnosing urinary incontinence causes with high sensor resolution.
Area of Science:
- Biomedical Engineering
- Medical Devices
- Sensor Technology
Background:
- Urodynamic testing is crucial for diagnosing urinary incontinence.
- Accurate urethral pressure measurement is essential for effective diagnosis.
- Existing methods may have limitations in providing continuous, localized pressure data.
Purpose of the Study:
- To develop a flexible sensor strip for urethral catheters.
- To enable precise measurement of pressure within the human urethra.
- To improve the diagnostic capabilities for urinary incontinence.
Main Methods:
- Fabrication of capacitive pressure sensors on a flexible polyimide-copper substrate.
- Utilizing surface micromachining and precise alignment/assembly techniques.
- Experimental evaluation using an in vitro test rig with a pressure chamber.
Main Results:
- The developed sensor strip demonstrated adequate sensitivity and repeatability.
- Individual sensor calibration factors showed variation.
- The least sensitive sensor achieved a resolution better than 0.1 psi.
Conclusions:
- The instrumented urethral catheter is suitable for clinical urodynamic testing.
- The sensor strip offers a promising tool for diagnosing urinary incontinence.
- The technology provides high-resolution pressure measurements in the urethra.
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