Monopolar Electrosurgical Thermal Management for Minimizing Tissue Damage

In this study, a novel thermal management system (TMS) is developed for the minimization of thermal spread created by a monopolar electrosurgical device, the most commonly used surgical instrument. The phenomenon of resistive heating of tissue is modeled using the finite-element method (FEM) to anal...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 2012-01, Vol.59 (1), p.167-173
Main Authors: Dodde, Robert E., Gee, Jacob S., Geiger, James D., Shih, Albert J.
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Coagulation
Computer-Aided Design
Computerized, statistical medical data processing and models in biomedicine
Cooling
Cryotherapy - instrumentation
Dogs
Electrodes
Electrosurgery
Electrosurgery - instrumentation
Equipment Design
Equipment Failure Analysis
Feedback
Finite element methods
finite-element method (FEM)
Heating
Medical sciences
Miscellaneous
Models and simulation
Models, Biological
monopolar
Spleen - pathology
Spleen - physiopathology
Spleen - surgery
Studies
Surgery
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgery, Computer-Assisted - methods
Temperature
Temperature measurement
thermal management
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Summary:In this study, a novel thermal management system (TMS) is developed for the minimization of thermal spread created by a monopolar electrosurgical device, the most commonly used surgical instrument. The phenomenon of resistive heating of tissue is modeled using the finite-element method (FEM) to analyze the electrical potential and temperature distributions in biological tissue subjected to heat generation during monopolar electrosurgery. Ex vivo experiments are used to validate the FEM by comparing the model predicted and experimentally measured temperatures. The predicted FEM maximum temperature 1.0 mm adjacent to the electrode is within 1% of the experimentally measured maximum temperature using a standard monopolar pencil electrode. A TMS consisting of adjacent cooling channels produces coagulation volumes 80% that of standard monopolar procedures while maintaining comparable temperatures in the targeted tissue below the electrode. In vivo temperatures using a device incorporating a TMS at distances of 2 and 3 mm adjacent to the electrode edge are maintained below temperatures known to damage tissue.
ISSN:0018-9294
1558-2531
DOI:10.1109/TBME.2011.2168956