Capacitive biopotential electrode with a ceramic dielectric layer

Vlach, Karel; Kijonka, Jan; Jurek, Frantisek; Vávra, P; Zonča, P

doi:10.1016/j.snb.2017.01.116

Cited by 18 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Research teams have conducted investigation on the development of capacitive coupling sensors (Chi and Cauwenberghs, 2009; Chi et al , 2010; Matthews et al , 2005; Lee et al , 2004; Vlach et al , 2017; Simon et al , 2016; Nazari et al , 2018; Varela-Benítez et al , 2015; Portelli and Nasuto, 2017; Lezhnina et al , 2019). One of the prototypes of the capacitive coupling electrode is the sensor for acquiring ECG/electroencephalogram (EEG) signals developed by scientists from the Quantum Applied Science & Research laboratory in San Diego (Chi and Cauwenberghs, 2009; Chi et al , 2010).…”

Section: Capacitive Coupling Sensors For Biomedical Signalsmentioning

confidence: 99%

“…In Vlach et al (2017), the results of the development of an active capacitive coupling electrode with a ceramic dielectric layer are presented. The electrode allows continuous monitoring of ECG signals, including the time when the patient is moving.…”

Section: Capacitive Coupling Sensors For Biomedical Signalsmentioning

confidence: 99%

“…Vlach et al (2017) compared several different dielectric materials, various sizes of the electrode surface, as well as various electronic components of the electrode. The research results showed the prospects of using a ceramic dielectric layer in the sensor design in terms of signal-to-noise ratio enhancement, when compared with capacitive coupling sensors of traditional design.…”

Section: Capacitive Coupling Sensors For Biomedical Signalsmentioning

confidence: 99%

“…For the correct operation of capacitive sensors, it is necessary to ensure their high-quality shielding from external interference. In a number of works (Chi and Cauwenberghs, 2009; Chi et al , 2010; Matthews et al , 2005; Lee et al , 2004; Vlach et al , 2017; Simon et al , 2016; Nazari et al , 2018; Varela-Benítez et al , 2015; Portelli and Nasuto, 2017), this is achieved with the use of a shielding layer located between the sensitive layer of the sensor and the layer on which the electronic components are located. In this sensor, it was decided to use external shielding by coating the sensor body with conductive materials – graphite GRAPHIT 33.…”

Section: Capacitive Coupling Sensor With the Ability To Control Skin–electrode Contactmentioning

confidence: 99%

See 3 more Smart Citations

Development of medical capacitive coupling electrodes using the skin-electrode contact control

Евтушенко¹,

Lezhnina

Morenetz

et al. 2020

View full text Add to dashboard Cite

Purpose The purpose of this paper is the development and study of capacitive coupling electrodes with the ability to monitor the quality of the skin–electrode contact in the process of electrocardiogram (ECG) diagnostics. The study’s scope embraces experimental identification of distortions contributed into the recorded ECG signal at various degrees of disturbance of the skin–electrode contact. Design/methodology/approach A capacitive coupling electrode is designed and manufactured. A large number of experiments was carried out to record ECG signals with different quality of the skin–electrode contact. Using spectral analysis, the characteristic distortions of the ECG signals in the event of contact disturbance are revealed. Findings It was found that the violation of the skin–electrode contact leads to significant deterioration in the recorded signal. In this case, the most severe distortions appear with various violations of the skin–electrode contact of two sensors in one lead. It has been experimentally shown that the developed sensor allows monitoring the quality of the contact, and therefore, improvement of the quality of signal registration, enabled by the use of bespoke processing algorithms. Practical implications These sensors will be used in personalized medicine devices and tele-ECG devices. Originality/value In this work, authors studied the effect of the skin–electrode contact of a capacitive electrode with the body on the quality of the recorded ECG signal. Based on the studies, the necessity of monitoring contact was shown to improve the quality of diagnostics provided by personalized medicine devices; the capacitive sensor with contact feedback was developed.

show abstract

Section: Capacitive Coupling Sensors For Biomedical Signalsmentioning

confidence: 99%

Section: Capacitive Coupling Sensors For Biomedical Signalsmentioning

confidence: 99%

Section: Capacitive Coupling Sensors For Biomedical Signalsmentioning

confidence: 99%

Section: Capacitive Coupling Sensor With the Ability To Control Skin–electrode Contactmentioning

confidence: 99%

See 2 more Smart Citations

Development of medical capacitive coupling electrodes using the skin-electrode contact control

Евтушенко¹,

Lezhnina

Morenetz

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Bioelectrical signals such as electrocardiography (ECG), electromyography (EMG), and electroencephalography (EEG) are diagnostic methods that are frequently used in medicine to monitor the health and diagnose various diseases. The frequency ranges of these signals are given in Table 1 [ 1 ]. Traditional monitoring systems use electrodes (most often Ag/AgCl) placed directly on the measured subject’s skin.…”

Section: Introductionmentioning

confidence: 99%

Common-Mode Voltage Reduction in Capacitive Sensing of Biosignal Using Capacitive Grounding and DRL Electrode

Bednar

Babušiak

Labuda

et al. 2021

Sensors

View full text Add to dashboard Cite

A capacitive measurement of the biosignals is a very comfortable and unobtrusive way suitable for long-term and wearable monitoring of health conditions. This type of sensing is very susceptible to noise from the surroundings. One of the main noise sources is power-line noise, which acts as a common-mode voltage at the input terminals of the acquisition unit. The origin and methods of noise reduction are described on electric models. Two methods of noise removal are modeled and experimentally verified in the paper. The first method uses a passive capacitive grounding electrode, and the second uses an active capacitive Driven Right Leg (DRL) electrode. The effect of grounding electrode size on noise suppression is experimentally investigated. The increasing electrode area reduces power-line noise: the power of power-line frequency within the measured signal is 70.96 dB, 59.13 dB, and 43.44 dB for a grounding electrode area of 1650 cm2, 3300 cm2, and 4950 cm2, respectively. The capacitive DRL electrode shows better efficiency in common-mode noise rejection than the grounding electrode. When using an electrode area of 1650 cm2, the DRL achieved 46.3 dB better attenuation than the grounding electrode at power-line frequency. In contrast to the grounding electrode, the DRL electrode reduces a capacitive measurement system’s financial costs due to the smaller electrode area made of the costly conductive textile.

show abstract

Self‐Adhesive and Ultra‐Conformable, Sub‐300 nm Dry Thin‐Film Electrodes for Surface Monitoring of Biopotentials

Nawrocki

Jin

Lee

et al. 2018

Adv Funct Materials

166

187

View full text Add to dashboard Cite

Accurate and unobtrusive monitoring of surface biopotentials is of paramount importance for physiological studies and wearable healthcare applications. Thin, light-weight, and conformal bioelectrodes are highly desirable for biopotential monitoring. This report demonstrates the fabrication of sub-300 nm thin, dry electrodes that are self-adhesive and conformable to complex 3D biological surfaces and thus capable of excellent quality of biopotential (surface electromyogram and surface electrocardiogram) recordings. Measurements reveal single-day stability of up to 10 h. In addition, the bending stiffness of the sensor is calculated to be ≈0.33 pN m 2 , which is comparable to stratum corneum, the uppermost layer of human skin, and this stiffness is over two orders of magnitude lower than the bending stiffness of a 3.0 µm thin sensor. Laminated on a prestretched elastomer, when relaxed, the sensor forms wrinkles with a period and amplitude equal to 17 and 4 µm, respectively, which these values agree with theoretical calculations. Finally, with skin vibrations of up to ≈15 µm, the sensor exhibits motion artifact-less monitoring of surface biopotentials, in contrast to a wet adhesive electrode that shows much greater influence.

show abstract

Capacitive biopotential electrode with a ceramic dielectric layer

Cited by 18 publications

References 10 publications

Development of medical capacitive coupling electrodes using the skin-electrode contact control

Development of medical capacitive coupling electrodes using the skin-electrode contact control

Common-Mode Voltage Reduction in Capacitive Sensing of Biosignal Using Capacitive Grounding and DRL Electrode

Self‐Adhesive and Ultra‐Conformable, Sub‐300 nm Dry Thin‐Film Electrodes for Surface Monitoring of Biopotentials

Contact Info

Product

Resources

About