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The lower urinary system consists of the urinary bladder and urethra, which are essential in storing and expelling urine from the body. Together with the internal and external sphincters, these structures work together to regulate urination effectively.Anatomy of the BladderThe urinary bladder is a muscular, stretchable organ behind the pubic bone and in front of the rectum. In females, the bladder is positioned anterior to the vagina and inferior to the uterus, while in males, it is located...
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Soft sensors for a sensing-actuation system with high bladder voiding efficiency.

F Arab Hassani1,2, H Jin2, T Yokota2

  • 1Department of Biomedical Engineering, National University of Singapore, 28 Medical Drive, #05-COR, Singapore 117456, Singapore.

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|June 5, 2020
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Summary
This summary is machine-generated.

This study introduces a novel bladder sensing-actuation system using soft sensors and shape memory alloy actuators for improved bladder management. The technology offers efficient voiding, preventing overfilling and aiding bladder impairment treatment.

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Robotics

Background:

  • Bladder dysfunction affects sensation and muscle control, necessitating assistive technologies.
  • Existing sensing-actuation systems face performance limitations due to component integration challenges and large volume changes.
  • Developing closed-loop systems for real-time bladder management is crucial for patient care.

Purpose of the Study:

  • To develop and evaluate a high-performance closed-loop sensing-actuation system for bladder management.
  • To integrate a soft capacitive sensor with a shape memory alloy actuator without compromising performance.
  • To provide an efficient voiding solution that avoids overfilling and aids bladder impairment treatment.

Main Methods:

  • Integration of a soft, thin capacitive sensor for continuous bladder volume detection.
  • Incorporation of a shape memory alloy-based actuator for strong emptying force.
  • Development of a bladder-compatible system where sensing and actuation elements do not interfere.

Main Results:

  • Achieved a closed-loop configuration with a soft sensor and shape memory alloy actuator.
  • Demonstrated continuous bladder volume detection and effective emptying force.
  • Attained a voiding target of 71–100% in rat bladders with a volume sensitivity of 0.7 μF/liter.

Conclusions:

  • The integrated system offers an efficient and effective solution for bladder voiding.
  • This technology represents a significant advancement in treating bladder impairment.
  • The soft sensor-actuator integration serves as a model for similar applications in other organs.