Endovenous Simulated Laser Experiments at 940 nm and 1470 nm Suggest Wavelength-Independent Temperature Profiles

Renate van den Bos, PWM van Ruijven, CWM van der Geld, MJC van Gernert, HAM Neumann, Tamar Nijsten

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Background: EVLA has proven to be very successful, but the optimum methods for energy delivery have still not been clarified. A better understanding of the mechanism of action may contribute to achieving a consensus on the best laser method and the most effective use of laser parameters, resulting in optimal clinical outcomes, maintaining high success rates with minimal adverse events. The aim of this study is to assess the impact of wavelength, pullback speed and power level on the endovenous temperature profile in an experimental setting. Methods: In an experimental setting, temperature measurements were performed using thermocouples. The experimental set-up consisted of a transparent box in which a glass tube was fixed. Different laser parameters (wavelength and power) and 2 different pullback speeds (2 and 5 mm/s) were used. Thermocouples were placed at different distances from the fiber tip. Validity of the experimental setting was assessed by performing the same temperature measurements using a stripped varicose vein. The max Results: The experiments showed that decreasing the pullback speed (2 mm/s) and increasing the power (up to 14 W) both cause higher maximal temperature and a longer time above the temperature for collagen denaturation. The use of different laser wavelengths (940 or 1470 nm) did not influence the temperature profile. Conclusion: The results of our experiments show that wavelength on its own has not been demonstrated to be an important parameter to influence the temperature profile. (C) 2012 European Society for Vascular Surgery. Published by Elsevier Ltd. All rights reserved.
Original languageUndefined/Unknown
Pages (from-to)77-81
Number of pages5
JournalEuropean Journal of Vascular and Endovascular Surgery
Issue number1
Publication statusPublished - 2012

Research programs

  • EMC MM-03-61-05-A

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