A mathematical model for irrigated epicardial radiofrequency ablation

被引：23

作者：

Gopalakrishnan, J ^{[1
]}

机构：

[1] Univ Florida, Dept Math, Gainesville, FL 32611 USA

[2] Univ Minnesota, Inst Math & Its Applicat, Minneapolis, MN USA

来源：

ANNALS OF BIOMEDICAL ENGINEERING | 2002年 / 30卷 / 07期

关键词：

arrhythmia; radiofrequency; invasive; epicardial; ablation; irrigation; saline; irrigated electrode; joule heating; thin film; numerical model; finite element;

D O I：

10.1114/1.1507845

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

A mathematical model for epicardial radiofrequency ablation using an electrode irrigated by saline is proposed. Saline flow profiles are derived using thin film theory, and heat convection due to blood flow is also included in the model. Results from a computer implementation of the model using a finite element method suggest that transmural ablation lesions can be made in 4-mm-thick tissue. Effects of parameters such as tissue and saline layer thickness, irrigation rate, blood flow rate, and applied power are. investigated. Saline is found to irrigate as well as ablate. Rise in saline temperature and consequent ablation by saline is more pronounced as saline layer becomes thicker. Electrode tip temperatures as much as 40 degreesC lower than maximum tissue temperature were found in simulations. (C) 2002 Biomedical Engineering Society.

引用

页码：884 / 893

页数：10

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