Programa del congreso

Wearable systems have emerged as key enablers of continuous electrophysiological signal acquisition beyond clinical settings. This work presents the design, fabrication, and validation of a stretchable, screen-printed electronic tattoo (e-tattoo) system for surface electromyography (sEMG) recordings. The device consists of silver/silver chloride (Ag/AgCl) electrodes printed on a thin, stretchable substrate and bonded to a flexible printed circuit board (flexPCB), enabling wireless signal acquisition. The e-tattoo demonstrated low impedance and stable electrochemical behavior during long term recordings. Designed to maintain performance under mechanical deformation and environmental stress, the system is optimized for comfort, miniaturization, and integration in non-clinical monitoring scenarios. Functional validation of the e-tattoo was performed through sEMG recordings from masticatory and respiratory muscles in healthy participants. In both cases, tattoo signals were benchmarked against commercial Ag/AgCl electrodes, showing strong morphological and temporal agreement. Correlation values reached 0.95 for masticatory recordings and 0,83 for respiratory tasks. Overall, this system provides a comfortable, miniaturized alternative for reliable sEMG acquisition. Its customizable form factor and compatibility with high-density designs suggest great potential for future applications in clinical monitoring, rehabilitation, and home-based healthcare.