INVESTIGATION OF THE INTERACTION OF ELECTRODES WITH TISSUE IN BIOPEDANCE DIAGNOSIS

Abstract

Background. In the modern world, much attention is paid to the early diagnosis and prevention of diseases of patients, which is associated with the need to develop and improve non-invasive, easily accessible and accurate biomedical devices in order to monitor the parameters of the functioning of the human body. Bioimpedance is a noninvasive technique that has a variety of applications. Biological tissue in contact with electrodes under the influence of alternating current exhibits complex impedance behavior, which requires the creation of accurate biophysical and electrical models. Materials and methods. In this paper, the models of interaction between electrode-tissue contacts are considered, and the factors influencing the result of impedance measurement are analyzed. Results. Based on the considered models of electrode-tissue contact interaction, a method for increasing the sensitivity of measurement and the accuracy of impedance measurement is proposed. Conclusions. The successful implementation of bioimpedance diagnostics depends on the basic biophysical and electrical model of the system, as well as the interaction of the electrode with the tissue. The methods of interaction between the electrode and the tissue studied in the work make it possible to increase the sensitivity, as well as to reduce the measurement errors.

Keywords

• bioimpedance
• electrode
• contact
• biological tissue
• bioimpedance measurement