Abstract
Objective To assess and evaluate the intraoperative power settings during clinical laser lithotripsy using the Ho:YAG laser in respect to calculus formation, size and position. Material and methods In total 145 operations for 99 solitary and 46 multiple kidney and ureter stones were retrospectivly analyzed. Laser fibers with core diameters of 220, 365 and 600 μm were used. Results Mean stone size was 10 mm2, mean operation time was 90 min, mean laser-related fragmentation time (lrft) was 365 s. There was a correlation between stone position throughout the collecting system, the overall operating time, the laser-related fragmentation time and the applied laser power (mJ). Overall applied laser power did also correlate with the predominant calculus composition. Conclusion In Ho:YAG laser treatment of urinary calculi, operation- and laser-related fragmentation times are directly related to stone size, composition and position.
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