Diseño e implementación de un sistema inalámbrico de adquisición de biopotenciales basado en electrodos capacitivos no invasivos

Abstract

The measurement of electrocardiographic signals is essential in the diagnostic and treatment of cardiovascular diseases, generally the instruments used for monitoring of biopotentials are expensive, large and the patient remains connected to a stationary device to record the ECG signals. Wet electrodes are most used in the recording of ECG signals; these are uncomfortable, cause damage to the skin and its use over long periods of time degrades the signal quality. This document describes the design and implementation of a wireless biopotential acquisition system based on non-invasive capacitive electrodes. The hardware of the system performs the filtering and amplification of the signals acquired by the capacitive electrodes, the microntroller processes the analog signals and sends them through wireless communication to a mobile device, also with the mobile application is possible to visualize and analyze the acquired signals. For validate the implemented prototype, measurements were performed with capacitive electrodes on different textures, with the objective of compare the results with those obtained using wet electrodes. In addition, a comparison was performed between the biopotentials obtained with the prototype implemented and with a wired system based on commercial wet electrodes.