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Updated: Jul 17, 2026

Cardiac Pressure-Volume Loop Analysis Using Conductance Catheters in Mice
Published on: September 17, 2015
Analytical and Numerical Studies of Volume Measurement using Conductance Catheter Techniques
Chanchai Thaijiam1, Timothy Gale
1Sch. of Eng., Tasmania Univ., Hobart, Tas.
Abstract:
Calculation of intra-ventricular blood volume using the impedance electrode technique suffers from inaccuracy arising from irregularity in ventricular geometry and non-uniformity in imposed electric fields. This is particularly evident in the right ventricle. To investigate this problem, we present analytical and numerical solutions for the electric field in a conductor with asymmetrical source electrodes. The results show the effects of field non-uniformity, and a potential improvement in using dual-excitation electrodes. We plan to extend these techniques to develop improved electrode configurations for use in blood volume measurements in the right ventricle.
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