Irreversible electroporation for treatment of metal stent occlusion in biliary tract – ex vivo experimental model

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14110%2F18%3A00103763" target="_blank" >RIV/00216224:14110/18:00103763 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s00270-018-2021-1" target="_blank" >http://dx.doi.org/10.1007/s00270-018-2021-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00270-018-2021-1" target="_blank" >10.1007/s00270-018-2021-1</a>

Result language

angličtina

Original language name

Irreversible electroporation for treatment of metal stent occlusion in biliary tract – ex vivo experimental model

Original language description

Purpose To prove the safety and feasibility of irreversible electroporation (IRE) using tubular catheters to treat biliary metal stent occlusions in an ex vivo experiment model. Material and methods IRE was performed using 3-electrode tubular IRE catheters placed in metal stents (EGIS biliary stent 10x80 mm) in ex vivo porcine liver models. The IRE catheter was connected to an IRE generator, with two electrodes set as active and one as indifferent. One-hundred 100 us pulses at voltages 300V, 650V, 1000V, and 1300V were used. Stent occlusion was simulated using porcine liver tissues of different thickness (2±1 mm and 5±1 mm). Five scenarios of geometry settings between stent, electrodes, and inner tissue were analysed. Values of electric current, impedance, and power output were measured. Potentially dangerous thermal effects were monitored thermographically and visually on the stent and surrounding parenchyma. Results The IRE procedure was feasible for all settings of the voltages of 300V and 650V. The maximum current limit of the generator was exceeded in case of low profile ingrowth tissue connected with one electrode and in all settings with use of 1300V. In these cases, thermal changes of the liver tissue were visualised. In contrast, heat changes in protocols using 300-650V were recorded only in range of 1,0-4,5°C. Significant difference of impedance between one-electrode and two-electrodes ranges of simulated stent occlusion was observed (p = 0,02, Mann-Whitney). Conclusion IRE using a 3-electrode tubular catheter shows feasibility for treatment of metal stent ingrowth in ex vivo experiments. We have established a safe and applicable IRE protocol for further in vivo experiments.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

30224 - Radiology, nuclear medicine and medical imaging

Project

<a href="/en/project/NV15-32484A" target="_blank" >NV15-32484A: New biotechnologies in prevention and treatment of biliary tract stenosis</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů