Modeling the Influence of Body Position in Bioimpedance Measurements

Bioimpedance spectroscopy (BIS) enables the determination of the human body composition (e.g. fat content, water content). From this data, it is possible to draw conclusions about the person's health state. This technology can be easily implemented combined with low costs, which could be used for an easy use at home with a reliable accuracy. Nevertheless, external factors such as body position influence the measurements, limiting their accuracy and use. The use of modeling of these external factors and their influence on the body could be used to improve the accuracy of the bioimpedance spectroscopy and to extend it for a continuous monitoring. In this paper the results of the modeling of the body position for a localized bioimpedance measurement (thigh) and a comparison with measurements on 5 subjects lying down for 40 minutes are shown and discussed.