Bioimpedance Spectroscopy as a Non-invasive Method of Determination of the Hydration Status in Hemodialysis Patients

In this article we introduced a new diagnostic device Body Composition Monitor (BCM) by Fresenius, which use for the determination of hydration status in hemodialysis patients the bioimpedance spectroscopy technique (measurements at 50 frequencies, from 5 to 1 000 kHz) and a unique three-compartment body composition model. Brief description of the physical principle of bioimpedance spectroscopy measurements is followed. In final section, we compared the results of measurements using BCM with traditional ultrasound method (collapsibility index of inferior vena cava CI-IVC - measurement of diameter and the collapse of IVC) by correlation analysis. We confirmed a statistically significant correlation between both methods.