Development of a bioimpedance instrument and investigation of the interaction of electrodes with a bioobject during bioimpedance diagnosis

In diagnostic medicine, in order to monitor physiological parameters that characterize the composition of the human body, the state of the respiratory system, in oncology and other areas, one of the informative parameters is bioimpedance. At the moment, when measuring bioimpedance parameters, much attention is paid to the methods and measurement accuracy. The biological object in contact with the electrodes under the influence of alternating current demonstrates a complex behavior of the impedance. In this article, from the metrological point of view, the contact electrode - biological object is analyzed; ways to reduce methodological errors due to the influence of electrodes are proposed, a model of a bioimpedance instrument is proposed.