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A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
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A Composite Flexible Sensor for Direct Ventricular Assist Device.

Zhong Yun1, Kuibing Li1, Hao Jiang1

  • 1The College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.

Sensors (Basel, Switzerland)
|April 12, 2022
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Summary

Researchers developed a novel implantable flexible sensor for heart failure devices. This sensor accurately measures drive pressure and deformation, improving ventricular assist device functionality.

Keywords:
flexible electronicsforce sensorsnanostructured materialspressure sensors

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Area of Science:

  • Biomedical Engineering
  • Materials Science

Background:

  • Heart failure necessitates advanced treatments like direct ventricular assist devices.
  • Effective monitoring of pressure and deformation is crucial for these devices.

Purpose of the Study:

  • To design and fabricate an implantable, flexible composite sensor for measuring pressure and deformation in ventricular assist devices.
  • To enhance the performance and reliability of flexible sensors for biomedical applications.

Main Methods:

  • Utilized high-voltage electric field guidance and porous foaming processes.
  • Developed a resistance/capacitive composite flexible sensor with a specialized structure.
  • Implemented an optimized common substrate process to mitigate interference.

Main Results:

  • Achieved a strain measurement sensitivity of 22 and pressure measurement sensitivity of 0.19 Kpa⁻¹.
  • Demonstrated stable strain measurements (up to 35 cycles) and pressure measurements (over 100 cycles).
  • Successfully tested the sensor on a pneumatic muscle direct ventricular assist device model, detecting surface contact and displacement signals.

Conclusions:

  • The designed composite flexible sensor effectively detects pressure and deformation signals.
  • The sensor shows improved performance and stability for application in direct ventricular assist devices.
  • The optimized substrate process successfully addressed interference issues in resistance/capacitance sensors.