Electrodermal Activity (EDA) Tracking of Meridians Using Graphene Tattoos

In Traditional Chinese Medicine (TCM), the monitoring of meridians is a fundamental method for assessing physiological health. While previous research has introduced electrical-based devices for meridian monitoring, these systems are typically bulky, heavy, and unsuitable for continuous wearable use. Furthermore, existing wearable prototypes often focus on single-point sensing, lacking the multi-channel capabilities required for comprehensive meridian mapping. In this study, we propose "AcuSense", an innovative, multi-channel wearable device designed for localized Electrodermal Activity (EDA) monitoring. Unlike prior systems, AcuSense features a lightweight, conformal design utilizing Graphene Electronic Tattoos (GETs) as high-sensitivity sensing electrodes. The device is capable of simultaneously measuring skin resistance across six channels, with data transmitted in real-time to a mobile application for remote monitoring. Beyond meridian tracking, we performed a feasibility study to evaluate the potential of using AcuSense for tracking postprandial blood glucose trends. In our initial preliminary study, a notable trend was observed between the temporal profiles of acupoint EDA and blood glucose variations. This work suggests the potential of GET-based wearables for non-invasive digital meridian sensing.