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Hairy-Skin-Adaptive Viscoelastic Dry Electrodes for Long-Term Electrophysiological Monitoring
Qiong Tian1,2, Hang Zhao1,2, Xin Wang1,2,3
1Neural Engineering Centre, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
Advanced Materials (Deerfield Beach, Fla.)
|April 18, 2023
Summary
A novel viscoelastic dry electrode (VDE) overcomes hair interference for stable, long-term epidermal electrophysiological monitoring. This breakthrough ensures accurate electrocardiography, electromyography, and electroencephalography signal detection on hairy skin.
Area of Science:
- Biomedical Engineering
- Wearable Technology
- Biosignal Monitoring
Background:
- Long-term epidermal electrophysiological (EP) monitoring is vital for diagnostics and human-machine interaction.
- Hair growth on skin causes motion artifacts and unstable contact with conventional dry epidermal electrodes, challenging ultralong-term EP signal detection.
- Existing methods struggle to maintain consistent signal quality on hairy skin due to physical interference.
Purpose of the Study:
- To develop an innovative dry electrode solution that ensures stable and high-quality epidermal electrophysiological signal detection on hairy skin.
- To overcome the limitations of current electrodes in maintaining long-term, artifact-free monitoring.
- To provide a versatile electrode for various applications including electrocardiography, electromyography, and electroencephalography.
Main Methods:
- Introduction of a hairy-skin-adaptive viscoelastic dry electrode (VDE).
- The VDE is designed to bypass hair and conform to skin wrinkles, ensuring stable interface impedance.
- Evaluation of VDE performance in terms of long-term stability (48 days, 100 cycles) and signal quality during various physiological activities.
Main Results:
- The VDE demonstrated long-lasting and stable interface impedance for 48 days and 100 cycles.
- Effective shielding against hair disturbances was observed in electrocardiography (ECG) monitoring, even during chest expansion.
- Successful electromyography (EMG) monitoring during large strain and easy, cap-free electroencephalography (EEG) monitoring on the skull were achieved.
Conclusions:
- The developed viscoelastic dry electrode (VDE) offers a robust solution for ultralong-term epidermal electrophysiological monitoring on hairy skin.
- VDE technology significantly improves signal quality and stability by mitigating hair-related motion artifacts.
- This innovation represents a substantial advancement, enabling reliable EP monitoring across diverse applications on challenging skin conditions.
