Design of hydrogel-based wearable EEG electrodes for medical applications

Hsieh, Ju Chun; Li, Yang; Wang, Huiqian; Perz, Matt; Tang, Qiong; Tang, Kai Wing Kevin; Pyatnitskiy, Ilya; Reyes, Raymond; Ding, Hong; Wang, Huiliang

doi:10.1039/d2tb00618a

Cited by 47 publications

(29 citation statements)

References 222 publications

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“…To overcome the exposed challenges, we believe further scalp EEG developments should consider the following. First, better quality patches with lower impedance and higher biocompatibility are needed 41 . Furthermore, appropriate patient and caregiver training are necessary for long‐term acquisitions to reduce low signal quality caused by incorrect use.…”

Section: Discussionmentioning

confidence: 99%

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In‐hospital and home‐based long‐term monitoring of focal epilepsy with a wearable electroencephalographic device: Diagnostic yield and user experience

Macea

Bhagubai

Broux³

et al. 2023

Epilepsia

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Section: Discussionmentioning

confidence: 99%

“…First, better quality patches with lower impedance and higher biocompatibility are needed. 41 by incorrect use. Second, specific EEG patterns, that is, seizure signature, 26,42 should be used to train the seizure detectors.…”

Section: Seizure Detection Performance Metricsmentioning

confidence: 99%

In‐hospital and home‐based long‐term monitoring of focal epilepsy with a wearable electroencephalographic device: Diagnostic yield and user experience

Macea

Bhagubai

Broux³

et al. 2023

Epilepsia

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show abstract

“…On-skin flexible patch sensors are widely used in monitoring the vital signs of the human body to determine its health condition. [214][215][216][217] For example, face monitoring includes the collection of temperature and electromyography signals, which allows the detection and understanding of the expressions and underlying emotions. 218 The pulse signals gathered at the wrist can be used to monitor the heart rate and health condition of organs.…”

Section: Stretchable Sensors For Spsmentioning

confidence: 99%

Evolution of nanostructured skin patches towards multifunctional wearable platforms for biomedical applications

DODDA

Rybak

et al. 2023

Nanoscale

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“…Among various dry electrode materials, hydrogel has unique advantages owing to its biological, tissue-like soft and wet structure, which is outstandingly biocompatible and skin compliant for use on human skin [ 13 , 14 , 15 ]. As is known to all, various hydrogel-based dry electrodes have been successfully developed for acquiring EMG, ECG, and EEG biosignals through adding electron-conductive materials into hydrogels [ 16 , 17 , 18 , 19 ]. For instance, Hsieh [ 20 ] designed a polyethylene glycol (PEG) hydrogel electrode with low skin–electrode impedance and long-term electrical stability.…”

Section: Introductionmentioning

confidence: 99%

A Nanoclay-Enhanced Hydrogel for Self-Adhesive Wearable Electrophysiology Electrodes with High Sensitivity and Stability

Wang

Yang

Sun

et al. 2023

Gels

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Hydrogel-based wet electrodes are the most important biosensors for electromyography (EMG), electrocardiogram (ECG), and electroencephalography (EEG); but, are limited by poor strength and weak adhesion. Herein, a new nanoclay-enhanced hydrogel (NEH) has been reported, which can be fabricated simply by dispersing nanoclay sheets (Laponite XLS) into the precursor solution (containing acrylamide, N, N′-Methylenebisacrylamide, ammonium persulfate, sodium chloride, glycerin) and then thermo-polymerizing at 40 °C for 2 h. This NEH, with a double-crosslinked network, has nanoclay-enhanced strength and self-adhesion for wet electrodes with excellent long-term stability of electrophysiology signals. First of all, among existing hydrogels for biological electrodes, this NEH has outstanding mechanical performance (93 kPa of tensile strength and 1326% of breaking elongation) and adhesion (14 kPa of adhesive force), owing to the double-crosslinked network of the NEH and the composited nanoclay, respectively. Furthermore, this NEH can still maintain a good water-retaining property (it can remain at 65.4% of its weight after 24 h at 40 °C and 10% humidity) for excellent long-term stability of signals, on account of the glycerin in the NEH. In the stability test of skin–electrode impedance at the forearm, the impedance of the NEH electrode can be stably kept at about 100 kΩ for more than 6 h. As a result, this hydrogel-based electrode can be applied for a wearable self-adhesive monitor to highly sensitively and stably acquire EEG/ECG electrophysiology signals of the human body over a relatively long time. This work provides a promising wearable self-adhesive hydrogel-based electrode for electrophysiology sensing; which, will also inspire the development of new strategies to improve electrophysiological sensors.

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Design of hydrogel-based wearable EEG electrodes for medical applications

Abstract: We are in the evolution of continuous monitoring of neural activity with non-invasive wearable EEGs. The development of hydrogel electrodes technology is important for home-use systems for long-term EEG monitoring and diagnostics of disease.

Cited by 47 publications

References 222 publications

In‐hospital and home‐based long‐term monitoring of focal epilepsy with a wearable electroencephalographic device: Diagnostic yield and user experience

In‐hospital and home‐based long‐term monitoring of focal epilepsy with a wearable electroencephalographic device: Diagnostic yield and user experience

Evolution of nanostructured skin patches towards multifunctional wearable platforms for biomedical applications

A Nanoclay-Enhanced Hydrogel for Self-Adhesive Wearable Electrophysiology Electrodes with High Sensitivity and Stability

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