Comparison of Internally Cooled Wet Electrode and Hepatic Vascular Inflow Occlusion Method for Hepatic Radiofrequency Ablation

• Published in: Gut and liver Vol. 6; no. 4; pp. 471 - 475
• Main Authors: Park, Mi-Hyun, Cho, June-Sik, Shin, Byung Seok, Jeon, Gyeong Sik, Lee, Byungmo, Lee, Kichang
• Format: Journal Article
• Language: English
• Published: Korea (South) The Korean Society of Gastroenterology; the Korean Society of Gastrointestinal Endoscopy; the Korean Association for the Study of the Liver; the Korean Society of Neurogastroenterology and Motility; Korean Association for the Study of Intestinal Diseases; Korean College of Helicobacter and Upper Gastrointestinal Research; Korean Pancreatobiliary Association; Korean Society of Gastrointestinal Cancer 01.10.2012; Gastroenterology Council for Gut and Liver; 거트앤리버 소화기연관학회협의회
• Subjects: catheter ablation; liver; Original; 내과학; Catheter ablation; Liver
• ISSN: 1976-2283; 2005-1212; 2005-1212
• DOI: 10.5009/gnl.2012.6.4.471

Various strategies to expand the ablation zone have been attempted using hepatic radiofrequency ablation (RFA). The optimal strategy, however, is unknown. We compared hepatic RFA with an internally cooled wet (ICW) electrode and vascular inflow occlusion. EIGHT DOGS WERE ASSIGNED TO ONE OF THREE GROUPS: only RFA using an internally cooled electrode (group A), RFA using an ICW electrode (group B), and RFA using an internally cooled electrode with the Pringle maneuver (group C). The ablation zone diameters were measured on the gross specimens, and the volume of the ablation zone was calculated. The ablation zone volume was greatest in group B (1.82±1.23 cm(3)), followed by group C (1.22±0.47 cm(3)), and then group A (0.48±0.33 cm(3)). The volumes for group B were significantly larger than the volumes for group A (p=0.030). There was no significant difference in the volumes between groups A and C (p=0.079) and between groups B and C (p=0.827). Both the usage of an ICW electrode and hepatic vascular occlusion effectively expanded the ablation zone. The use of an ICW electrode induced a larger ablation zone with easy handling compared with using hepatic vascular occlusion, although this difference was not statistically significant.