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Related Experiment Video

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Stretchable, Self-Healing, and Skin-Mounted Active Sensor for Multipoint Muscle Function Assessment.

Chan Wang1,2, Xuecheng Qu1,2, Qiang Zheng1,2

  • 1CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China.

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|June 4, 2021
PubMed
Summary

A new stretchable, self-healing sensor monitors muscle function for elderly health and rehabilitation. This advanced sensor offers high accuracy and reliability for real-time muscle assessment.

Keywords:
muscle function assessmentself-healing hydrogelself-poweredskin-mountedtriboelectric nanogenerator

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Wearable Technology

Background:

  • Muscle function assessment is crucial for elderly health, motor evaluation, and rehabilitation.
  • Traditional metallic electrodes lack flexibility and are prone to damage, necessitating advanced sensor solutions.
  • There is a need for reliable, accurate, and quantifiable mechanical sensors for muscle monitoring.

Purpose of the Study:

  • To develop a novel ionic hydrogel-based sensor for muscle function assessment.
  • To create a stretchable, self-healing, and skin-mounted (Triple S) active sensor (TSAS).
  • To evaluate the TSAS's performance in quantifying muscle activity and joint movement.

Main Methods:

  • Synthesis of an ionic hydrogel with high deformation tolerance and self-healing capabilities.
  • Fabrication of a skin-mounted active sensor (TSAS) utilizing electrostatic induction and coupling.
  • Testing the TSAS for sensing properties including output voltage, detection limit, response time, and stability.
  • Simultaneous acquisition of muscle signals (biceps, triceps brachii) and joint angle during arm training.

Main Results:

  • The TSAS demonstrated a maximum output voltage of 78.44 V and a minimal detection limit of 0.2 mN.
  • Achieved a fast response time of 1.03 ms with a high signal-to-noise ratio and excellent long-term stability.
  • Successfully acquired functional signals from arm muscles and joint dexterity during training.
  • Wireless data transmission to a terminal for analysis was demonstrated.

Conclusions:

  • The developed TSAS, based on a self-healing ionic hydrogel, offers superior sensing capabilities.
  • TSAS exhibits high sensitivity, reliability, and convenience for real-time muscle function assessment.
  • This technology shows significant potential as a next-generation tool for rehabilitation and health monitoring.