Evaluation of radiofrequency ablation using a 1-Fr wire electrode in porcine pancreas, liver, gallbladder, spleen, kidney, stomach, and lymph nodes: A pilot study
Background and Aim The frequency of detecting asymptomatic incidental lesions of the pancreas is increasing. A substantial number of these lesions are either malignant or premalignant, thus mandating pancreatic resection. A less invasive treatment option may be feasible for selected patients. Endosc...
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Published in | Digestive endoscopy Vol. 28; no. 4; pp. 465 - 468 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Australia
Blackwell Publishing Ltd
01.05.2016
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Subjects | |
Online Access | Get full text |
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Summary: | Background and Aim
The frequency of detecting asymptomatic incidental lesions of the pancreas is increasing. A substantial number of these lesions are either malignant or premalignant, thus mandating pancreatic resection. A less invasive treatment option may be feasible for selected patients. Endoscopic ultrasound‐guided radiofrequency ablation (RFA) may be offered as a treatment option for these patients. The objective of the present study was to evaluate the performance characteristics of monopolar RFA using a 1‐Fr wire electrode in porcine pancreas, liver, gallbladder, spleen, kidney, stomach, and lymph nodes.
Methods
Six Yorkshire pigs were used for this study. The internal organs were accessed after a midline laparotomy. Manual monopolar RFAs were carried out over a 90‐s period using a wide range of power settings (3, 4, 5, 10, 15, and 25 W). The pancreas was exposed at all power settings; the other organs were exposed at power settings of 3, 4, 5, and 10 W. Maximum diameter of coagulative necrosis was measured.
Results
In all study animals, RFA was carried out in the target organs without difficulty. Only the pancreas showed definite coagulative necrosis. Maximum diameter of coagulative necrosis (8.0 ± 1.7 mm) was achieved at 5 W. No definite coagulative necrosis was noted in the other organs.
Conclusions
Monopolar RFA using a 1‐Fr wire electrode resulted in coagulative necrosis in porcine pancreas. RFA at higher power settings resulted in relatively homogeneous necrosis. At a given power setting, the RFA effect is likely to differ according to electrical properties of the target tissue. |
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Bibliography: | ark:/67375/WNG-N9FQL0RS-6 istex:890A06E8C2638F98245B2A13DEDA708186544B91 ArticleID:DEN12575 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0915-5635 1443-1661 |
DOI: | 10.1111/den.12575 |