Characterization of laser-tissue interaction processes by low-boiling emitted substances

Hans-Juergen Weigmann; Juergen Lademann; Ulrike Serfling; W. Lehnert; Wolfram Sterry; H. Meffert

doi:10.1117/12.229552

10 January 1996 Characterization of laser-tissue interaction processes by low-boiling emitted substances

Hans-Juergen Weigmann, Juergen Lademann, Ulrike Serfling, W. Lehnert, Wolfram Sterry, H. Meffert

Proceedings Volume 2624, Laser-Tissue Interaction and Tissue Optics; (1996) https://doi.org/10.1117/12.229552
Event: BiOS Europe '95, 1995, Barcelona, Spain

Abstract

Main point in this study was the investigation of the gaseous and low-boiling substances produced in the laser plume during cw CO₂ laser and XeCl laser irradiation of tissue by gas chromatography (GC)/mass spectrometry. The characteristic emitted amounts of chemicals were determined quantitatively using porcine muscular tissue. The produced components were used to determine the character of the chemical reaction conditions inside the interaction zone. It was found that the temperature, and the water content of the tissue are the main parameter determining kind and amount of the emitted substances. The relative intensity of the GC peak of benzene corresponds to a high temperature inside the interaction area while a relative strong methylbutanal peak is connected with a lower temperature which favors Maillard type reaction products. The water content of the tissue determines the extent of oxidation processes during laser tissue interaction. For that reason the moisture in the tissue is the most important parameter to reduce the emission of harmful chemicals in the laser plume. The same methods of investigation are applicable to characterize the interaction of a controlled and an uncontrolled rf electrosurgery device with tissue. The results obtained with model tissue are in agreement with the situation characteristic in laser surgery.

Citation Download Citation

Hans-Juergen Weigmann, Juergen Lademann, Ulrike Serfling, W. Lehnert, Wolfram Sterry, and H. Meffert "Characterization of laser-tissue interaction processes by low-boiling emitted substances", Proc. SPIE 2624, Laser-Tissue Interaction and Tissue Optics, (10 January 1996); https://doi.org/10.1117/12.229552

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