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Mathematical modeling of radiofrequency ablation for varicose veins

Title
Mathematical modeling of radiofrequency ablation for varicose veins
Authors
Choi S.Y.Kwak B.K.Seo T.
Ewha Authors
최선영
SCOPUS Author ID
최선영scopus
Issue Date
2014
Journal Title
Computational and mathematical methods in medicine
ISSN
1748-6718JCR Link
Citation
vol. 2014, pp. 485353
Indexed
SCIE; SCOPUS WOS scopus
Abstract
We present a three-dimensional mathematical model for the study of radiofrequency ablation (RFA) with blood flow for varicose vein. The model designed to analyze temperature distribution heated by radiofrequency energy and cooled by blood flow includes a cylindrically symmetric blood vessel with a homogeneous vein wall. The simulated blood velocity conditions are U = 0, 1, 2.5, 5, 10, 20, and 40 mm/s. The lower the blood velocity, the higher the temperature in the vein wall and the greater the tissue damage. The region that is influenced by temperature in the case of the stagnant flow occupies approximately 28.5% of the whole geometry, while the region that is influenced by temperature in the case of continuously moving electrode against the flow direction is about 50%. The generated RF energy induces a temperature rise of the blood in the lumen and leads to an occlusion of the blood vessel. The result of the study demonstrated that higher blood velocity led to smaller thermal region and lower ablation efficiency. Since the peak temperature along the venous wall depends on the blood velocity and pullback velocity, the temperature distribution in the model influences ablation efficiency. The vein wall absorbs more energy in the low pullback velocity than in the high one.
DOI
10.1155/2014/485353
Appears in Collections:
의과대학 > 의학과 > Journal papers
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