Calculation of blood volume change in impedance cardiography by a 3-D finite element thoracic model

Author

Kim, Deok W.

Author_Institution

Dept. of Biomed. Eng., Yonsei Univ., Seoul, South Korea

fYear

1994

fDate

1994

Firstpage

888

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IEMBS.1994.415197

Filename

415197