Development of a Flexible Wireless ECG Monitoring Device With Dry Fabric Electrodes for Wearable Applications
Development of a Flexible Wireless ECG Monitoring Device With Dry Fabric Electrodes for Wearable Applications
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DOI：
10.1109/jsen.2021.3116215
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发表时间：
2022-06-15
影响因子：
4.3
通讯作者：
Atashbar, Massood Z.
中科院分区：
文献类型：
--
作者：
Masihi, Simin;Panahi, Masoud;Atashbar, Massood Z.
为了在可穿戴生物医学应用中监测生理信号，制作了一种与织物集成的柔性无线心电图仪。心电图仪由干电极和读出模块组成。将多壁碳纳米管(MWCNTs)/聚二甲基硅氧烷(PDMS)复合材料沉积在带有丝网印刷银(Ag)层的热塑性聚氨酯(TPU)衬底上，制备了干式电极。在柔性聚酰亚胺衬底上设计并制作了具有无线数据传输能力的读出模块。将心电装置安装在织物上，通过对心电信号的测量并与常规湿法银/氯化银电极的结果进行比较，研究了该装置的性能。据观察，与传统的湿式心电电极相比，该装置在信号强度和相关性方面表现出类似的性能。信噪比(SNR)分析表明，干式电极的平均信噪比(SNR)为23.1dB，优于市售的Ag/AgCl型电极(SNR为21.2dB)。此外，还研究了基于织物的干电极在运动状态下的生理活动中测量心电信号的能力。这使得能够理解运动伪影对干电极响应的影响，并允许将获得的心电信号与传统湿心电电极的响应进行比较(受类似条件的影响)。据观察，尽管干电极不使用任何类型的粘合剂来测量心电信号，但它们的性能与传统的湿电极非常相似。所获得的结果清楚地证明了在医疗保健应用中使用基于织物的柔性干式心电电极来连续监测心电信号的可行性，并且有可能取代湿电极。
A flexible wireless electrocardiogram (ECG) device, integrated with fabric was fabricated for monitoring physiological signals in wearable biomedical applications. The ECG device consists of dry electrodes and a readout module. The dry electrode was fabricated by depositing multi-walled carbon nanotube (MWCNTs)/polydimethyl-siloxane (PDMS) composite on a thermoplastic polyurethane (TPU) substrate with screen printed silver (Ag) layer. The readout module with wireless data transmission capability was designed and fabricated on a flexible polyimide substrate. The ECG device was attached to fabric, and its performance was investigated by measuring the ECG signals and comparing them with the results of conventional wet Ag/AgCl electrode. It was observed that the device demonstrated similar performance in terms of signal intensity and correlation when compared to the conventional wet ECG electrodes. Signal-to-noise-ratio (SNR) analysis clearly showed that the dry electrodes with an average SNR of 23.1 dB, perform better than the commercially available Ag/AgCl electrodes (SNR of 21.2 dB). In addition, the capability of the fabric based dry electrodes to measure ECG signals during the physiological activities under exercise motions was studied. This enabled understanding the effect of motion artifacts on the dry electrode response and allowed comparing the obtained ECG signals with the responses of conventional wet ECG electrodes (subjected to similar conditions). It was observed that, even though dry electrodes didn't use any kind of adhesive gel for measuring the ECG signals, they performed very similar to conventional wet electrodes. The results obtained clearly demonstrated the feasibility of employing fabric based flexible dry ECG electrodes for continuous monitoring of ECG signals in health care applications and can potentially replace the wet electrodes.