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Investigating the possible effect of electrode support structure on motion artifact in wearable bioelectric signal monitoring

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Investigating the possible effect of electrode support structure on motion artifact in wearable bioelectric signal monitoring. / Cömert, Alper; Hyttinen, Jari.

julkaisussa: BioMedical Engineering Online, Vuosikerta 14, 44, 15.05.2015.

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@article{ee68bde2b7334cfbbb693526150adc07,
title = "Investigating the possible effect of electrode support structure on motion artifact in wearable bioelectric signal monitoring",
abstract = "Background: With advances in technology and increasing demand, wearable biosignal monitoring is developing and new applications are emerging. One of the main challenges facing the widespread use of wearable monitoring systems is the motion artifact. The sources of the motion artifact lie in the skin-electrode interface. Reducing the motion and deformation at this interface should have positive effects on signal quality. In this study, we aim to investigate whether the structure supporting the electrode can be designed to reduce the motion artifact with the hypothesis that this can be achieved by stabilizing the skin deformations around the electrode.Methods: We compare four textile electrodes with different support structure designs: a soft padding larger than the electrode area, a soft padding larger than the electrode area with a novel skin deformation restricting design, a soft padding the same size as the electrode area, and a rigid support the same size as the electrode. With five subjects and two electrode locations placed over different kinds of tissue at various mounting forces, we simultaneously measured the motion artifact, a motion affected ECG, and the real-time skin-electrode impedance during the application of controlled motion to the electrodes.Results: The design of the electrode support structure has an effect on the generated motion artifact; good design with a skin stabilizing structure makes the electrodes physically more motion artifact resilient, directly affecting signal quality. Increasing the applied mounting force shows a positive effect up to 1,000 gr applied force. The properties of tissue under the electrode are an important factor in the generation of the motion artifact and the functioning of the electrodes. The relationship of motion artifact amplitude to the electrode movement magnitude is seen to be linear for smaller movements. For larger movements, the increase of motion generated a disproportionally larger artifact. The motion artifact and the induced impedance change were caused by the electrode motion and contained the same frequency components as the applied electrode motion pattern.Conclusion: We found that stabilizing the skin around the electrode using an electrode structure that manages to successfully distribute the force and movement to an area beyond the borders of the electrical contact area reduces the motion artifact when compared to structures that are the same size as the electrode area.",
keywords = "Motion artifact, Surface electrodes, Textile electrodes, Un-gelled electrodes, Electrode design, Electrode structure, Wearable monitoring, Skin-electrode impedance, ECG, EMG, AMERICAN-HEART-ASSOCIATION, TEXTILE ELECTRODES, DRY ELECTRODES, CLINICAL-CARDIOLOGY, SKIN, ELECTROCARDIOGRAPHY, POTENTIALS, IMPEDANCE, STANDARDIZATION, RECOMMENDATIONS",
author = "Alper C{\"o}mert and Jari Hyttinen",
year = "2015",
month = "5",
day = "15",
doi = "10.1186/s12938-015-0044-2",
language = "English",
volume = "14",
journal = "BioMedical Engineering Online",
issn = "1475-925X",
publisher = "Springer Verlag",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Investigating the possible effect of electrode support structure on motion artifact in wearable bioelectric signal monitoring

AU - Cömert, Alper

AU - Hyttinen, Jari

PY - 2015/5/15

Y1 - 2015/5/15

N2 - Background: With advances in technology and increasing demand, wearable biosignal monitoring is developing and new applications are emerging. One of the main challenges facing the widespread use of wearable monitoring systems is the motion artifact. The sources of the motion artifact lie in the skin-electrode interface. Reducing the motion and deformation at this interface should have positive effects on signal quality. In this study, we aim to investigate whether the structure supporting the electrode can be designed to reduce the motion artifact with the hypothesis that this can be achieved by stabilizing the skin deformations around the electrode.Methods: We compare four textile electrodes with different support structure designs: a soft padding larger than the electrode area, a soft padding larger than the electrode area with a novel skin deformation restricting design, a soft padding the same size as the electrode area, and a rigid support the same size as the electrode. With five subjects and two electrode locations placed over different kinds of tissue at various mounting forces, we simultaneously measured the motion artifact, a motion affected ECG, and the real-time skin-electrode impedance during the application of controlled motion to the electrodes.Results: The design of the electrode support structure has an effect on the generated motion artifact; good design with a skin stabilizing structure makes the electrodes physically more motion artifact resilient, directly affecting signal quality. Increasing the applied mounting force shows a positive effect up to 1,000 gr applied force. The properties of tissue under the electrode are an important factor in the generation of the motion artifact and the functioning of the electrodes. The relationship of motion artifact amplitude to the electrode movement magnitude is seen to be linear for smaller movements. For larger movements, the increase of motion generated a disproportionally larger artifact. The motion artifact and the induced impedance change were caused by the electrode motion and contained the same frequency components as the applied electrode motion pattern.Conclusion: We found that stabilizing the skin around the electrode using an electrode structure that manages to successfully distribute the force and movement to an area beyond the borders of the electrical contact area reduces the motion artifact when compared to structures that are the same size as the electrode area.

AB - Background: With advances in technology and increasing demand, wearable biosignal monitoring is developing and new applications are emerging. One of the main challenges facing the widespread use of wearable monitoring systems is the motion artifact. The sources of the motion artifact lie in the skin-electrode interface. Reducing the motion and deformation at this interface should have positive effects on signal quality. In this study, we aim to investigate whether the structure supporting the electrode can be designed to reduce the motion artifact with the hypothesis that this can be achieved by stabilizing the skin deformations around the electrode.Methods: We compare four textile electrodes with different support structure designs: a soft padding larger than the electrode area, a soft padding larger than the electrode area with a novel skin deformation restricting design, a soft padding the same size as the electrode area, and a rigid support the same size as the electrode. With five subjects and two electrode locations placed over different kinds of tissue at various mounting forces, we simultaneously measured the motion artifact, a motion affected ECG, and the real-time skin-electrode impedance during the application of controlled motion to the electrodes.Results: The design of the electrode support structure has an effect on the generated motion artifact; good design with a skin stabilizing structure makes the electrodes physically more motion artifact resilient, directly affecting signal quality. Increasing the applied mounting force shows a positive effect up to 1,000 gr applied force. The properties of tissue under the electrode are an important factor in the generation of the motion artifact and the functioning of the electrodes. The relationship of motion artifact amplitude to the electrode movement magnitude is seen to be linear for smaller movements. For larger movements, the increase of motion generated a disproportionally larger artifact. The motion artifact and the induced impedance change were caused by the electrode motion and contained the same frequency components as the applied electrode motion pattern.Conclusion: We found that stabilizing the skin around the electrode using an electrode structure that manages to successfully distribute the force and movement to an area beyond the borders of the electrical contact area reduces the motion artifact when compared to structures that are the same size as the electrode area.

KW - Motion artifact

KW - Surface electrodes

KW - Textile electrodes

KW - Un-gelled electrodes

KW - Electrode design

KW - Electrode structure

KW - Wearable monitoring

KW - Skin-electrode impedance

KW - ECG

KW - EMG

KW - AMERICAN-HEART-ASSOCIATION

KW - TEXTILE ELECTRODES

KW - DRY ELECTRODES

KW - CLINICAL-CARDIOLOGY

KW - SKIN

KW - ELECTROCARDIOGRAPHY

KW - POTENTIALS

KW - IMPEDANCE

KW - STANDARDIZATION

KW - RECOMMENDATIONS

U2 - 10.1186/s12938-015-0044-2

DO - 10.1186/s12938-015-0044-2

M3 - Article

VL - 14

JO - BioMedical Engineering Online

JF - BioMedical Engineering Online

SN - 1475-925X

M1 - 44

ER -