Title :
Calculation of blood volume change in impedance cardiography by a 3-D finite element thoracic model
Author_Institution :
Dept. of Biomed. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
In this study impedance changes due to aortic expansion during systole was calculated for various electrode configurations in impedance cardiography using a three-dimensional finite element thoracic model. The aorta between the potential electrodes in the model was expanded for the increase of blood volume, 30 ml. The blood volume increase in the aorta was calculated with the basal impedance (Z) and the impedance change (ΔZ) found from the finite element code using the formula, Δvol=ρ(L/Z)2 ΔZ. It was calculated to be 24 ml for the conventional configuration. For the other three ones, they were all closer to 30 ml than the conventional one
Keywords :
blood; cardiology; electric impedance imaging; finite element analysis; physiological models; 3D finite element thoracic model; aortic expansion-induced impedance changes; basal impedance; blood volume change calculation; blood volume increase; electrode configuration; finite element code; systole; Biomedical electrodes; Blood; Cardiography; Conductivity; Finite element methods; Impedance; Laplace equations; Muscles; Neck; Thorax;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.415197
