INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Evaluation of Long-term Stability of ECG Electrode: Taking Leather Electrode as an Example |
LIU Hailong, GOU Li*
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College of Biomedical Engineering, Sichuan University, Chengdu 610065, China |
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Abstract The new flexible electrode can collect electrocardiogram (ECG) data more conveniently, but there is a lack of research on the evaluation of the long-term stability of the electrode in verifying the effectiveness of the electrode. A multi-dimensional method was proposed to evaluate the long-term stability of the new flexible electrode including three aspects of appearance, electrode-skin contact impedance and ECG recording quality under three postures, in which the ECG recording quality was evaluated by the improved signal-to-noise ratio, the designed hamming distance (HD-RPS-2D) and other four commonly used indexes. Verified by the self-made new pig leather electrode, the results show that, during the wearing experiment of 144 hours, the appearance of the pig leather electrode changes little and the electrode-skin contact impedance is lower than that of the standard electrode in the range of 20—50 Hz with a small overall fluctuation in all test frequency bands. The 6 indexes can evaluate the quality of ECG well. And the index values of the collected ECG are very close to that of the standard electrode in the three postures, especially remain stable for a long term in the sitting and standing posture.
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Published: 25 February 2025
Online: 2025-02-18
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