Characterization of alternating current impedance properties of biomedical electrodes

Zhou, Wei; Cheng, De-cai; Song, Rong; Zhang, Chun-jian; Xu, Wei‐Qin; Pan, Xiaoling

doi:10.1007/s11771-013-1609-5

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…A setup designed for the EII recording during the ME insertion process is shown in Figure 4 . A two-electrode measurement method was employed to record EII [ 3 , 22 ]. The placements of the ME and Ag/AgCl electrode are shown in Figure 4 .…”

Section: Methodsmentioning

confidence: 99%

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Fabrication of Micro-Needle Electrodes for Bio-Signal Recording by a Magnetization-Induced Self-Assembly Method

Chen

Ren

Chen

et al. 2016

Sensors

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Micro-needle electrodes (MEs) have attracted more and more attention for monitoring physiological electrical signals, including electrode-skin interface impedance (EII), electromyography (EMG) and electrocardiography (ECG) recording. A magnetization-induced self-assembling method (MSM) was developed to fabricate a microneedle array (MA). A MA coated with Ti/Au film was assembled as a ME. The fracture and insertion properties of ME were tested by experiments. The bio-signal recording performance of the ME was measured and compared with a typical commercial wet electrode (Ag/AgCl electrode). The results show that the MA self-assembled from the magnetic droplet array under the sum of gravitational surface tension and magnetic potential energies. The ME had good toughness and could easily pierce rabbit skin without being broken or buckling. When the compression force applied on the ME was larger than 2 N, ME could stably record EII, which was a lower value than that measured by Ag/AgCl electrodes. EMG signals collected by ME varied along with the contraction of biceps brachii muscle. ME could record static ECG signals with a larger amplitude and dynamic ECG signals with more distinguishable features in comparison with a Ag/AgCl electrode, therefore, ME is an alternative electrode for bio-signal monitoring in some specific situations.

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Section: Methodsmentioning

confidence: 99%

“…Bio-signals are difficult to obtain due to their weak and unstable characteristics [ 1 , 2 ]. Electrodes are good biosensors used to collect these bio-signals [ 3 ]. Wet electrodes, dry electrodes and micro-needles electrodes (MEs) are typical ones used for bio-signal monitoring.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Micro-Needle Electrodes for Bio-Signal Recording by a Magnetization-Induced Self-Assembly Method

Chen

Ren

Chen

et al. 2016

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…Among all bio-signals, three are the most important to realize the physiological and pathological state of human health: electrocardiography (ECG), electromyography (EMG), and electroencephalography (EEG), which correspond to the signals of the heart, brain, and muscle, respectively [ 15 , 97 , 98 , 99 ]. Medical electrodes such as the conventional wet electrode (Ag/AgCl) or microneedle array electrode (MAE) can effectively measure these bio-signals [ 100 ]. The wet electrode has a limitation of skin irritation or allergic reactions [ 101 ] and needs skin preparation [ 102 ], which is not suitable for long-term use [ 103 ].…”

Section: Applicationsmentioning

confidence: 99%

In-Plane Si Microneedles: Fabrication, Characterization, Modeling and Applications

Mamun

Zhao

2022

Micromachines

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Microneedles are getting more and more attention in research and commercialization since their advancement in the 1990s due to the advantages over traditional hypodermic needles such as minimum invasiveness, low material and fabrication cost, and precise needle geometry control, etc. The design and fabrication of microneedles depend on various factors such as the type of materials used, fabrication planes and techniques, needle structures, etc. In the past years, in-plane and out-of-plane microneedle technologies made by silicon (Si), polymer, metal, and other materials have been developed for numerous biomedical applications including drug delivery, sample collections, medical diagnostics, and bio-sensing. Among these microneedle technologies, in-plane Si microneedles excel by the inherent properties of Si such as mechanical strength, wear resistance, biocompatibility, and structural advantages of in-plane configuration such as a wide range of length, readiness of integration with other supporting components, and complementary metal-oxide-semiconductor (CMOS) compatible fabrication. This article aims to provide a review of in-plane Si microneedles with a focus on fabrication techniques, theoretical and numerical analysis, experimental characterization of structural and fluidic behaviors, major applications, potential challenges, and future prospects.

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A Mini Review of Microneedle Array Electrode for Bio-Signal Recording: A Review

et al. 2020

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Characterization of alternating current impedance properties of biomedical electrodes

Cited by 5 publications

References 16 publications

Fabrication of Micro-Needle Electrodes for Bio-Signal Recording by a Magnetization-Induced Self-Assembly Method

Fabrication of Micro-Needle Electrodes for Bio-Signal Recording by a Magnetization-Induced Self-Assembly Method

In-Plane Si Microneedles: Fabrication, Characterization, Modeling and Applications

A Mini Review of Microneedle Array Electrode for Bio-Signal Recording: A Review

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