Abstract
The conductance catheter system is a tool to determine instantaneous left ventricular volume in vivo by converting measured conductance to volume. The currently adopted conductance-to-volume conversion equation was proposed by Baan, and the accuracy of this equation is limited by the assumption of a linear conductance-volume relationship. The electric field generated by a conductance catheter is nonuniform, which results in a nonlinear relationship between conductance and volume. This paper investigates this nonlinear relationship and proposes a new nonlinear conductance-to-volume conversion equation. The proposed nonlinear equation uses a single empirically determined calibration coefficient, derived from independently measured stroke volume. In vitro experiments and numerical model simulations were performed to verify and validate the proposed equation.
Original language | English (US) |
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Pages (from-to) | 1654-1661 |
Number of pages | 8 |
Journal | IEEE Transactions on Biomedical Engineering |
Volume | 52 |
Issue number | 10 |
DOIs | |
State | Published - Oct 2005 |
Keywords
- Conductance catheter
- Conductance-volume relationship
- Volume estimation
ASJC Scopus subject areas
- Biomedical Engineering