Radiofrequency ablation of liver adjacent to body of gallbladder: histopathologic changes of gallbladder wall in a pig model

AJR. American Journal of Roentgenology
Jiwon LeeYoung-Sun Kim

Abstract

The purpose of our study was to evaluate the histopathologic changes of gallbladder wall surrounding radiofrequency ablation zones in pig livers and to assess the risk factors for thermal injury of gallbladder wall in terms of distance of the electrode, electrode direction in relation to the gallbladder wall, and time of sacrifice of the animal. The study was performed in 15 pigs using an internally cooled single electrode with a 1-cm electrically active tip under sonographic guidance. Twenty-three hepatic ablation zones abutting the gallbladder were analyzed in three phases on the basis of the distance of the electrode (group A, 0.5 cm; group B, 1.0 cm), electrode direction (perpendicular or parallel), and time of sacrifice (immediate or delayed [7 days after radiofrequency ablation]). We evaluated the gross changes, the depth of thermal injury, and the grade of abnormal microscopic changes in the gallbladder wall. Data analysis was performed on the basis of the Fisher's exact test. Discoloration and perforation were more frequent in group A (60%, 6/10, and 20%, 2/10, respectively) than in group B (25%, 2/8, and 0%, respectively, p > 0.05). Perforation was more frequent in the parallel direction and delayed phase (33.3%, 1/3, ...Continue Reading

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Citations

Jun 8, 2014·Journal of Vascular and Interventional Radiology : JVIR·Alexandra H FairchildStuart G Silverman
May 6, 2010·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Mishal Mendiratta-LalaS Nahum Goldberg
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Apr 10, 2019·Cardiovascular and Interventional Radiology·Julien GarnonAfshin Gangi

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