NDLI: A mathematical model of bipolar radiofrequency-induced thermofusion

Content Provider	IEEE Xplore Digital Library
Author	Wagenpfeil, J. Nold, B. Fischer, K. Neugebauer, A. Rothmund, R. Kramer, B. Brucker, S. Mischinger, J. Schwentner, C. Schenk, M. Wallwiener, D. Stenzl, A. Enderle, M. Sawodny, O. Ederer, M.
Copyright Year	2014
Description	Author affiliation: ERBE Elektromedizin GmbH, Tübingen, Germany (Nold, B.; Fischer, K.; Neugebauer, A.; Enderle, M.) \|\| Inst. for Syst. Dynamics, Univ. of Stuttgart, Stuttgart, Germany (Wagenpfeil, J.; Sawodny, O.; Ederer, M.) \|\| Univ. Hosp. Tubingen, Tübingen, Germany (Rothmund, R.; Kramer, B.; Brucker, S.; Mischinger, J.; Schwentner, C.; Schenk, M.; Wallwiener, D.; Stenzl, A.)
Abstract	Bipolar radiofrequency-induced thermofusion has become a widely accepted method successfully used in open and particularly in minimally-invasive surgery for the sealing of blood vessels and tissue of up to several millimeters diameter. Despite its wide-spread application, the thermofusion process itself is not well understood on a quantitative and dynamic level, and manufacturers largely rely on trial-and-error methods to improve existing instruments. To predict the effect of alternative generator control strategies and to allow for a more systematic approach to improve thermofusion instruments, a mathematical model of the thermofusion process is developed. The system equations describe the spatial and temporal evolution of the tissue temperature due to Joule heating and heat transfer, and the loss of tissue water due to vaporization. The resulting effects on the tissue properties, most importantly the electrical resistivity, heat capacity and thermal conductivity, are considered as well. Experimental results indicate that the extent of the lateral thermal damage is directly affected by Joule heating of the lateral tissue. The experimental findings are supported by simulation results using the proposed mathematical model of thermofusion.
Sponsorship	IEEE Eng. Med. Biol. Soc.
Starting Page	5683
Ending Page	5686
File Size	3051628
Page Count	4
File Format	PDF
ISBN	9781424479290
ISSN	1557170X
DOI	10.1109/EMBC.2014.6944917
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mathematical model Heat transfer Instruments Resistance heating Water heating Temperature measurement Electrodes
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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