Title :
Design of a single segment conductance catheter for measurement of left ventricular volume
Author :
Soderqvist, E. ; Carlsson, C. ; Brodin, A. ; Elmqvist, H. ; Kronander, H. ; Ericsson, A.B.
Author_Institution :
Department of Medical Engineering, Karolinska Inst., Huddinge, Sweden
Abstract :
The objective of this paper is to investigate how to best position the sensing electrodes on a single segment conductance catheter, and to calculate the expected performance. Using electrode potential data, obtained with the present five segment conductance catheter in pig experiments, we have interpolated the electrical field at any given point of time, and calculated what volume curve to expect with only two sensing electrodes. Comparison shows that the deviation between our calculated method and the present one is stable and small. Mean deviation with optimized electrode positions was 0.05% per sample, and the maximum deviation found for a single time sample was 2.57%. This indicates that it is possible to build a thin single segment catheter with as good performance as for the present five segment conductance catheter.
Keywords :
bioelectric phenomena; biomedical electrodes; cardiology; electric admittance measurement; volume measurement; electrical field interpolation; electrode potential data; left ventricular volume measurement; medical instrumentation; optimized electrode positions; pig experiments; sensing electrodes; single segment conductance catheter; thin single segment catheter; Animals; Biomedical electrodes; Biomedical engineering; Catheters; Hospitals; Magnetic resonance imaging; Position measurement; Surgery; Ultrasonic variables measurement; Volume measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1018873
