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Proceedings Paper

Comparative investigation of pyrolysis products due to laser and rf surgery with regard to the latest device development
Author(s): Kai Desinger; Wolfgang Waesche; Hansjoerg Albrecht
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Paper Abstract

Cutting and vaporization of biological tissue, performing surgical procedures are always connected with the generation of pyrolysis products due to heat increase caused by laser radiation, direct thermal heating or radiofrequency- (RF-) current application. This paper presents quantitative and qualitative results on the produced pyrolysis products considering latest device developments. Volatile organic compounds were adsorbed using a multisorbent sampler and evaluated with a gas chromatography system coupled with a FTIR spectrometer. The calibration of the system together with geometrical considerations of the adsorption allows for a quantitative determination of some toxicological relevant substances. For a quantitative statement, a standardized application of optical and electrical energy is requested. Therefore, in vitro investigations were performed Nd:YAG laser radiation and radiofrequency current in monopolar and bipolar technique were used for simulation of cutting in open surgery. We used a 600 micrometers bare fiber, a monopolar and a bipolar needle electrode with similar geometric shape for tissue incisions. The depth and speed of cutting was standardized for all experiments. The cutting parameters for laser and RF application were chosen in such a way that the quality and the depth of the coagulation zone are comparable for all applications.

Paper Details

Date Published: 10 January 1996
PDF: 6 pages
Proc. SPIE 2624, Laser-Tissue Interaction and Tissue Optics, (10 January 1996); doi: 10.1117/12.229561
Show Author Affiliations
Kai Desinger, Laser-und Medizin-Technologie GmbH (Germany)
Wolfgang Waesche, Freie Univ. Berlin (Germany)
Hansjoerg Albrecht, Laser-und Medizin-Technologie GmbH (Germany)

Published in SPIE Proceedings Vol. 2624:
Laser-Tissue Interaction and Tissue Optics
Guy P. Delacretaz; Rudolf W. Steiner; Lars Othar Svaasand; Hansjoerg Albrecht; Thomas H. Meier, Editor(s)

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