Programa del congreso
Resúmenes y datos de las sesiones para este congreso. Seleccione una fecha o ubicación para mostrar solo las sesiones en ese día o ubicación. Seleccione una sola sesión para obtener una vista detallada (con resúmenes y descargas, si están disponibles).
|
Resumen diario |
| Sesión | |
|
Vi-P3: Sesión de pósteres III Lugar: Zona pósteres | |
    | |
Feasibility of cellulose-based electrodes for ECG parameter analysis: preliminary assessment in healthy volunteers 1: Universitat Politècnica de Catalunya (UPC) / Institute of Bioengineering of Catalonia (IBEC) / CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Barcelona, Spain; 2: Institute of Microelectronics of Barcelona (IMB-CNM), Spain; 3: Advanced Biomaterials and Nanotechnology, University of Girona, Girona, Spain The increased demand for sustainable biomedical devices has motivated the use of novel substrates for electrophysiological monitoring. Cellulose, a biodegradable and low-cost material, offers an attractive alternative to conventional electrodes. This study presents a preliminary evaluation of cellulose-based electrodes for electrocardiography (ECG) acquisition under resting conditions. The proposed electrode consists of a three-layer architecture: a conductive vegetal cellulose film doped with PEDOT:PSS (50:50 weight ratio) as the core, an adhesive layer, and a hydrogel layer, assembled by rapid prototyping. Its rectangular geometry (2.5 × 2 cm, with a 1 cm connection tab) balances conductivity and mechanical flexibility. ECG signals were simultaneously recorded from cellulose-based and standard reference electrodes placed in bipolar lead I in three healthy volunteers (mean age 25 ± 10 years). Recordings lasted ~150 s at a 1000 Hz sampling rate. Preprocessing included baseline drift attenuation and fourth-order Butterworth low-pass filtering (45 Hz), followed by automatic QRS detection and delineation. Morphological similarity was assessed using Pearson’s correlation coefficient (r) and Root Mean Square Error (RMSE). Frequency-domain analysis was performed through power spectral density (PSD, Welch’s method) and coherence analysis. Cardiac intervals of clinical relevance (RR, QRS duration, QT, and Tpe) were estimated from delineated signals. Results showed strong agreement between electrodes (r = 0.87 ± 0.09; RMSE = 0.10 ± 0.03). Reference signals displayed slightly higher power at low frequencies (<10 Hz), consistent with coherence findings. Interval analysis revealed minimal errors for RR and QRSd, while QT and Tpe presented larger deviations, likely due to challenges in T-wave end delineation. These findings support the feasibility of cellulose-based electrodes as a sustainable and reliable alternative for ECG monitoring, with further optimization required to improve T-wave interval estimation. | |