Endoscopic radiofrequency ablation has gained interest for treating abdominal tumors. The radiofrequency ablation electrode geometry largely determines the size and shape of the ablation zone. Mismatch between the ablation zone and tumor shapes leads to reoccurrence of the cancer. Recently, work has been published regarding a novel deployable multi-tine electrode for endoscopic radiofrequency ablation. The prior work developed a thermal ablation model to predict the ablation zone surrounding an electrode and a systematic optimization of the electrode shape to treat a specific tumor shape. The purpose of this work is to validate the thermal ablation model through experiments in a tissue phantom that changes color at ablation temperatures. The experiments highlight the importance of thermal tissue damage in finite element modeling. Thermal induced changes in tissue properties, if not accounted for in finite element modeling, can lead to significant overprediction of the expected ablation zone surrounding an electrode.
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2019 Design of Medical Devices Conference
April 15–18, 2019
Minneapolis, Minnesota, USA
ISBN:
978-0-7918-4103-7
PROCEEDINGS PAPER
A Deployable Multi-Tine Endoscopic Radiofrequency Ablation Electrode: Simulation Validation in a Thermochromic Tissue Phantom
Bradley Hanks,
Bradley Hanks
Pennsylvania State University, University Park, PA
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Fariha Azhar,
Fariha Azhar
Pennsylvania State University, University Park, PA
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Mary Frecker,
Mary Frecker
Pennsylvania State University, University Park, PA
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Ryan Clement,
Ryan Clement
Actuated Medical Inc., Bellefonte, PA
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Jenna Greaser,
Jenna Greaser
Actuated Medical Inc., Bellefonte, PA
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Kevin Snook
Kevin Snook
Actuated Medical Inc., Bellefonte, PA
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Bradley Hanks
Pennsylvania State University, University Park, PA
Fariha Azhar
Pennsylvania State University, University Park, PA
Mary Frecker
Pennsylvania State University, University Park, PA
Ryan Clement
Actuated Medical Inc., Bellefonte, PA
Jenna Greaser
Actuated Medical Inc., Bellefonte, PA
Kevin Snook
Actuated Medical Inc., Bellefonte, PA
Paper No:
DMD2019-3214, V001T06A001; 6 pages
Published Online:
July 19, 2019
Citation
Hanks, B, Azhar, F, Frecker, M, Clement, R, Greaser, J, & Snook, K. "A Deployable Multi-Tine Endoscopic Radiofrequency Ablation Electrode: Simulation Validation in a Thermochromic Tissue Phantom." Proceedings of the 2019 Design of Medical Devices Conference. 2019 Design of Medical Devices Conference. Minneapolis, Minnesota, USA. April 15–18, 2019. V001T06A001. ASME. https://doi.org/10.1115/DMD2019-3214
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