Portable Measurement Equipment for Continuous Biomedical Monitoring using Microelectrodes

This paper presents new portable electronic measurement equipment for non-invasive biomedical monitoring of selected psychosomatic processes. The main goal is monitoring of psycho-galvanic reflex of the human skin that might be very useful for stress identification in medical and psychological experiments. An integrated monitoring system, applicable also in wireless measurement environment, was designed and developed The proposed measurement system employs methods based on measurement of human skin conductivity using the interdigitated array (IDA) microelectrode. The proposed measurement system utilizes microprocessors with RF wireless communication module used for data transfer between the measurement system and a personal computer. A graphical user interface (GUI) in C++ under Windows XP platform has been developed in order to provide necessary calibration of the measurement as well as storage, displaying and postprocessing of the measured data (real and imaginary components of the impedance as well as phase of the measured impedance).