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Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
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Development of a modularized seating system to actively manage interface pressure.

Chung-Huang Yu1, Tung-Yu Chou2, Cheng-Huan Chen3

  • 1Department of Physical Therapy & Assistive Technology, National Yang-Ming University, No.155, Sec.2, Linong Street, Taipei 11221, Taiwan. chyu@ym.edu.tw.

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This study introduces a novel modular system for wheelchair cushions to actively manage interface pressure, reducing the risk of pressure ulcers for immobile users. The system

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Materials Science

Background:

  • Pressure ulcers pose a significant health risk, particularly for immobile wheelchair users.
  • Existing pressure-relieving cushions have limitations, necessitating innovative solutions.
  • Active pressure management strategies offer potential benefits over passive systems.

Purpose of the Study:

  • To verify a proposed active approach for pressure ulcer prevention by combining merits of passive and active cushions.
  • To develop and assess a modular system capable of actively managing interface pressure in real-time.

Main Methods:

  • Development of a modular system with height-adjustable support elements, each equipped with sensors and actuators.
  • Integration of force sensors, position sensors, and linear actuators within a 3 cm × 3 cm support element.
  • Chaining of modules to create adaptable support surfaces with precise control over displacement and force.

Main Results:

  • The modular system demonstrated feasibility through verification tests.
  • Each support element achieved a displacement resolution < 0.1 mm and force sensor error < 1%.
  • The system can provide 49 N pushing force per element, enabling active interface pressure management.

Conclusions:

  • The developed modularized system is capable of actively managing interface pressure in real-time.
  • This technology holds promise for reducing the incidence of pressure ulcers in wheelchair users.
  • Further improvements and clinical applications are discussed for future development.