Comparison of tissue pressure and ablation time between the LeVeen and cool-tip needle methods |
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Authors: | Makoto Nakamuta Motoyuki Kohjima Shusuke Morizono Tsuyoshi Yoshimoto Yuzuru Miyagi Hironori Sakai Munechika Enjoji Kazuhiro Kotoh |
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Affiliation: | (1) Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Japan;(2) Department of Gastroenterology, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan |
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Abstract: | Background Radio frequency ablation (RFA) has been accepted clinically as a useful local treatment for hepatocellular carcinoma (HCC). However, intrahepatic recurrence after RFA has been reported which might be attributable to increase in intra-tumor pressure during RFA. To reduce the pressure and ablation time, we developed a novel method of RFA, a multi-step method in which a LeVeen needle, an expansion-type electrode, is incrementally and stepwise expanded. We compared the maximal pressure during ablation and the total ablation time among the multi-step method, single-step method (a standard single-step full expansion with a LeVeen needle), and the method with a cool-tip electrode. Finally, we performed a preliminary comparison of the ablation times for these methods in HCC cases. |
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