Comparative investigation of pyrolysis products due to laser and rf surgery with regard to the latest device development

Kai Desinger; Wolfgang Waesche; Hansjoerg Albrecht

doi:10.1117/12.229561

10 January 1996 Comparative investigation of pyrolysis products due to laser and rf surgery with regard to the latest device development

Kai Desinger, Wolfgang Waesche, Hansjoerg Albrecht

Author Affiliations +

Proceedings Volume 2624, Laser-Tissue Interaction and Tissue Optics; (1996) https://doi.org/10.1117/12.229561
Event: BiOS Europe '95, 1995, Barcelona, Spain

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.

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Kai Desinger, Wolfgang Waesche, and Hansjoerg Albrecht "Comparative investigation of pyrolysis products due to laser and rf surgery with regard to the latest device development", Proc. SPIE 2624, Laser-Tissue Interaction and Tissue Optics, (10 January 1996); https://doi.org/10.1117/12.229561

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