Development of printed and flexible dry ECG electrodes
Development of printed and flexible dry ECG electrodes
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DOI：
10.1016/j.sbsr.2018.05.001
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发表时间：
2018-09-01
影响因子：
5.3
通讯作者：
Atashbar, Massood Z.
中科院分区：
文献类型：
--
作者：
Chlaihawi, Amer Abdulmahdi;Narakathu, Binu Baby;Atashbar, Massood Z.
已开发出用于监测心电图（ECG）信号的印刷的、柔性的和可穿戴的干电极，而无需任何皮肤准备和使用湿凝胶。将银（Ag）薄片油墨丝网印刷在柔性聚对苯二甲酸乙二醇酯（PET）基底上以制造干ECG电极。然后，多壁碳纳米管（MWCNT）/聚二甲基硅氧烷（PDMS）复合材料，作为一种导电聚合物，通过使用棒涂技术沉积在印刷银电极。通过测试MWCNT/PDMS复合材料的电导率和测量电极半径从8 mm变化到16 mm的电极-皮肤阻抗来研究印刷电极的性能。观察到具有最大面积的干燥ECG电极在MWCNT/PDMS复合材料电导率方面表现出更好的性能，与商用湿银/银氯化银（Ag/AgCl）电极相比，心电图信号强度和相关性。此外，还研究了干ECG电极在放松坐姿和受试者运动时监测ECG信号的能力，并将结果与湿Ag/AgCl ECG电极（T716）进行了比较。当受试者运动时，印刷的干电极噪声较小，并且由于其在电极-皮肤界面处的更好的适形接触，能够更好地识别信号中的典型ECG特征。所获得的结果表明，采用传统的丝网印刷工艺的柔性干ECG电极的发展在生物医学行业的应用的可行性。
Printed, flexible and wearable dry electrodes for monitoring electrocardiogram (ECG) signals, without any skin preparation and use of wet gel, has been developed. Silver (Ag) flake ink was screen printed on a flexible polyethylene terephthalate (PET) substrate to fabricate the dry ECG electrode. Multi-walled carbon nanotube (MWCNT)/polydimethylsiloxane (PDMS) composite, as a conductive polymer, was then deposited on the printed Ag electrode by using a bar coating technique. The performance of the printed electrodes was investigated by testing the MWCNT/PDMS composite conductivity and measuring the electrode-skin impedance for electrode radii varying from 8mm to 16 mm. It was observed that the dry ECG electrode, with the largest area, demonstrated better performance, in terms of MWCNT/PDMS composite conductivity, ECG signal intensity and correlation when compared to a commercial wet silver/silver chloride (Ag/AgCl) electrode. In addition, the capability of the dry ECG electrodes for monitoring ECG signals in both the relaxed sitting position and while the subject is in motion, was also investigated and the results were compared with a wet Ag/AgCl ECG electrode (T716). While the subject is in motion, the printed dry electrodes were less noisy and were able to better identify the typical ECG characteristics in the signals due to its better conformal contact at the electrode-skin interface. The results obtained demonstrated the feasibility of employing conventional screen printing process for the development of flexible dry ECG electrodes for applications in the biomedical industry.