ABSTRACT
ABSTRACT: Impedance Cardiography (ICG) is a simple and cheap method to acquire hemodynamic parameters. In this work, the feasibility of a swine model to extract these parameters with regard to reflect human impedance measurements is analyzed. Therefore, not only the physiological morphology of the signal shall be analyzed, but also its behavior during fluid accumulation. For this purpose, the bioimpedance of female pigs have been monitored for 5:30 h while being infused for blood volume stabilization. Our work uses data collected at experiments dedicated on research on optimal extracorporal circulation while ICG was used as an additional measurement value for cardiovascular supervision. The results show a linear correlation between the calculated total body water and the measured fluid balance. In addition, the morphology of the ICG signals is comparable to human signals, providing the possbility to extract stroke volumes using modified model assumptions. Furthermore, cardiac output measured invasively shows the same trend as estimated by bioimpedance.
