Title :
The importance of representing surface geometry and electrode resistance of transvenous electrodes in defibrillation models
Author :
Pendekanti, Rajesh ; Henriquez, Craig ; Wolf, Patrick
Author_Institution :
Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA
Abstract :
The potential gradient fields created by transvenous defibrillation (TVD) electrodes during internal defibrillation are often calculated using volume conductor models. Most defibrillation models represent the TVD electrode as an equipotential cylindrical rod and do not account for electrode features like electrode resistance, surface geometry, and electrode-electrolyte impedance. This study looks into the effects of the first two features. Results from tank studies and finite element models indicate that defibrillation models that do not consider the effects of surface geometry and electrode resistance can underestimate the total defibrillation impedance by about 10%
Keywords :
biomedical equipment; defibrillators; finite element analysis; modelling; defibrillation models; electrode resistance; electrode-electrolyte impedance; equipotential cylindrical rod; finite element models; potential gradient fields; surface geometry; tank studies; total defibrillation impedance; transvenous defibrillation electrodes; volume conductor models; Biomedical electrodes; Biomedical engineering; Conductors; Defibrillation; Electrodes; Finite element methods; Geometry; Immune system; Solid modeling; Space vector pulse width modulation; Surface impedance; Surface resistance;
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.1994.412174
