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Pressure and temperature: do high-power lasers pose a threat?

Principal Investigator
Prof. Evangelos Liatsikos, University of Patras, Greece
EAU 2020
In his state-of-the-art lecture, Prof. Evangelos Liatsikos (University of Patras, Greece) argued that both the high-power holmium laser and the superpulse thulium fibre laser can cause significant temperature and pressure damage in the absence of adequate irrigation, even with just 5 Watt (W). Using a ureteral access sheath (UAS) with a diameter of ≥10/12 French (Fr) helps regulating pressure, as well as improving visibility. To avoid damage, it is important to use 40 mL/min irrigation up to a power of 40 W, but in general, high laser power settings require high irrigation flows [1]. “For many years, we have been using both flexible laser lithotripsy and mini-percutaneous nephrolithotomy (PCNL) like video games without wondering what kind of pressures or what kind of temperatures we are generating inside the kidney,” Prof. Liatsikos stated. Previous research has shown that even with just 1 second of power dangerous tempera...

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