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Dynamic Electrical Impedance in Bipolar Tissue Welding

[+] Author Affiliations
Xiaoran Li, Russell Borduin, Wei Li

University of Texas at Austin, Austin, TX

Roland Chen

Washington State University, Pullman, WA

Paper No. MSEC2017-3091, pp. V004T05A012; 6 pages
doi:10.1115/MSEC2017-3091
From:
  • ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing
  • Volume 4: Bio and Sustainable Manufacturing
  • Los Angeles, California, USA, June 4–8, 2017
  • Conference Sponsors: Manufacturing Engineering Division
  • ISBN: 978-0-7918-5075-6
  • Copyright © 2017 by ASME

abstract

Bipolar tissue welding is a material joining process where high frequency alternating current is applied to biological tissue in medical procedures such as wound closure and blood vessel sealing. The process is often performed with a set of laparoscopic forceps in a minimal invasive surgery to achieve less bleeding and shorter recovery time. However, problems such as tissue sticking, thermal damage, and joint failure often occur and need to be solved before the process can be reliably used in more surgical procedures. In this study, experiments were conducted to investigate dynamic behavior of the tissue welding process through electrical impedance measurements. Both scissor-type and parallel electrodes were used with various compression and power settings in the experiment. It was found that the electrical impedance of tissue was lower when parallel electrodes were used. It can be used to understand the results and dynamic behavior of the tissue welding process, including the size of heat affected zone, tissue sticking, and the compression force effect.

Copyright © 2017 by ASME

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