Active Laplacian electrode for the data-acquisition system of EHG

Li, G; Wang, Y; Lin, Lang; Jiang, Wei; Wang, L L; Lu, Stephen C.-Y.; Besio, Walter G.

doi:10.1088/1742-6596/13/1/077

Cited by 14 publications

(9 citation statements)

References 3 publications

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“…The smaller sensing volume means fewer recordings from the muscle cells, which was responsible for the lower power (RMS) of the swallowing signals recorded by CRE in this study. Similar results have been reported when comparing CRE and CDEs recordings of other bioelectrical signals such as the electrocardiogram [ 47 ], electroenterogram [ 28 ] and electrohysterogram [ 25 , 26 ]. The smaller signal power can also lead to a poorer signal-to-noise ratio if the noise power is not reduced at a similar rate.…”

Section: Discussionsupporting

confidence: 84%

“…CREs were first used in electrocardiography to acquire high spatial resolution surface ECG signals [ 20 ]. They were later developed in different configurations [ 21 ], dimensions and materials (from rigid substrates [ 22 ] to flexible or textile ones [ 23 ]) to pick up a wide range of bioelectric signals such as electroencephalographic [ 22 , 24 ], electrohysterographic [ 25 , 26 ], electroenterographic [ 27 , 28 ] and diaphragmatic sEMG [ 29 ], and others from the skeletal muscles [ 30 ]. The masseter EMG has been recorded by CRE in clinical sleep bruxism (SB) diagnosis in the muscles involved in the swallowing process [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Swallowing Related Muscle Activity by Means of Concentric Ring Electrodes

Garcia-Casado

Prats-Boluda

Ye-Lin

et al. 2020

Sensors

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Surface electromyography (sEMG) can be helpful for evaluating swallowing related muscle activity. Conventional recordings with disc electrodes suffer from significant crosstalk from adjacent muscles and electrode-to-muscle fiber orientation problems, while concentric ring electrodes (CREs) offer enhanced spatial selectivity and axial isotropy. The aim of this work was to evaluate CRE performance in sEMG recordings of the swallowing muscles. Bipolar recordings were taken from 21 healthy young volunteers when swallowing saliva, water and yogurt, first with a conventional disc and then with a CRE. The signals were characterized by the root-mean-square amplitude, signal-to-noise ratio, myopulse, zero-crossings, median frequency, bandwidth and bilateral muscle cross-correlations. The results showed that CREs have advantages in the sEMG analysis of swallowing muscles, including enhanced spatial selectivity and the associated reduction in crosstalk, the ability to pick up a wider range of EMG frequency components and easier electrode placement thanks to its radial symmetry. However, technical changes are recommended in the future to ensure that the lower CRE signal amplitude does not significantly affect its quality. CREs show great potential for improving the clinical monitoring and evaluation of swallowing muscle activity. Future work on pathological subjects will assess the possible advantages of CREs in dysphagia monitoring and diagnosis.

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Section: Discussionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Evaluation of Swallowing Related Muscle Activity by Means of Concentric Ring Electrodes

Garcia-Casado

Prats-Boluda

Ye-Lin

et al. 2020

Sensors

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“…To the authors' knowledge, the flexible array of active concentric ring electrodes presented in this paper is the first one of these characteristics. Other authors have developed active concentric ring electrodes but on rigid substrates (Li et al, 2005); (Prats-Boluda et al, 2011); (Koka and Besio, 2007). This new sensor is more comfortable for the subject under study and provides a better contact since it adapts to the body surface curvature.…”

Section: Discussionmentioning

confidence: 99%

“…In flexible substrates it is very complicated to use bias between layers, and the solution proposed in the present work favours an easier manufacturing. Moreover, in contrast to individual electrodes (Prats-Boluda et al, 2012); (Li et al, 2005); (Koka and Besio, 2007), the electrode array developed in this work is a more compact solution that reduces the signal preconditioning cost and space, and it is more suitable for bioelectrical mapping of the body surface. Furthermore, the modularity of the developed sensor permits to reuse the signal conditioning circuit while the sensing part can be disposed for hygienic reasons.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, laplacian potential can also be directly estimated by means of concentric ring electrodes in tripolar, bipolar or tripolar in bipolar configuration (TCB, where the outer ring and the center disc were electrically shorted) (Lu and Tarjan, 1999); (Besio et al, 2006); (Koka and Besio, 2007). TCB ring electrodes have already been used to estimate the Laplacian potential of bioelectrical signals such as the electrocardiogram (ECG), electroencephalogram (EEG), electroenterogram (EEnG) and the electrohysterogram (EHG), so as to increase the spatial resolution of and the signal quality of conventional surface potential recordings (Li et al, 2005); (Prats-Boluda et al, 2011); (Koka and Besio, 2007). These electrodes are usually active since the signals sensed by concentric ring electrodes in laplacian configuration are weaker than the ones obtained my conventional monopolar or bipolar recordings, and the output impedance is bigger.…”

Section: Bioelectrical Laplacian Recordingsmentioning

confidence: 99%

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Flexible Array of Active Concentric Ring Electrodes for Surface Bioelectrical Recordings - Application to Non-invasive Recordings of EEnG

Garcia-Casado¹,

Zena²,

Prats-Boluda³

et al. 2013

Proceedings of the International Conference on Biomedical Electronics and Devices

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The estimation of laplacian potential on the body surface obtained by means of concentric ring electrodes can provide bioelectrical signals with better spatial resolution and less affected by bioelectrical interferences than monopolar and bipolar recordings with conventional disc electrodes. These ringed electrodes are usually implemented on rigid substrates which cannot adapt to body surface curvature. In this paper an array of flexible concentric ring electrodes for non-invasive bioelectrical activity recordings is presented. The array contains three tripolar electrodes in bipolar configuration (TCB, inner disc and external ring are shorted) which is suitable for body surface mapping. A preconditioning circuit module is directly connected to the electrode array to perform a first stage of filtering and amplification as close as possible to the recording area. Simultaneous recordings of intestinal myoelectrical activity (electroenterogram, EEnG) by means of the flexible array of ringed-electrodes and by disc electrodes with gel were carried out in healthy volunteers in fast state. Signals from the developed array of electrodes presented lower electrocardiographic and respiratory interference than conventional bipolar recordings with disc electrodes. The small bowel's slow wave myoelectrical activity can be identified more easily in the ringed-electrodes recordings.

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Concentric ring electrodes for non-invasive recording of gastric myoelectric activity

et al. 2022

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Active Laplacian electrode for the data-acquisition system of EHG

Cited by 14 publications

References 3 publications

Evaluation of Swallowing Related Muscle Activity by Means of Concentric Ring Electrodes

Evaluation of Swallowing Related Muscle Activity by Means of Concentric Ring Electrodes

Flexible Array of Active Concentric Ring Electrodes for Surface Bioelectrical Recordings - Application to Non-invasive Recordings of EEnG

Concentric ring electrodes for non-invasive recording of gastric myoelectric activity

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