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Experimental Study and Evaluation of Paper-based Inkjet Electrodes for ECG Signal Acquisition

Alves, A. P. Alves ; Martins, João Martins ; Silva, H. ; Lourenço, A. ; Fred, A. L. N. ; Ferreira, H. F.

Experimental Study and Evaluation of Paper-based Inkjet Electrodes for ECG Signal Acquisition, Proc International Conf. Physiological Computing Systems - PhyCS, Lisbon, Portugal, Vol. , pp. 275 - 281, January, 2014.

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Abstract
Applications involving biosignals, such as Electrocardiography (ECG), are becoming more pervasive with the extension towards non-intrusive scenarios helping targeting ambulatory healthcare monitoring, emotion assessment, among many others. In this study we introduce a new type of silver/silver chloride (Ag/AgCl) electrodes based on a paper substrate and produced using an inkjet printing technique. This type of electrodes can increase the potential applications of biosignal acquisition technologies for everyday life use, given that there are several advantages, such as cost reduction and easier recycling, resultant from the approach explored in our work. We performed a comparison study to assess the quality of this new electrode type, in which ECG data was collected with three types of Ag/AgCl electrodes: i) gelled; ii) dry iii) paper-based inkjet printed. We also compared the performance of each electrode when acquired using a professional grade gold standard device, and a low cost platform. Experimental results showed that data acquired using our proposed inkjet printed electrode is highly correlated with data obtained through conventional electrodes. Moreover, the electrodes are robust to high-end and low end data acquisition devices.