Evaluation of 200 Mm, 365 Mm and 500 Mm Fibers of Laser Ho YAG in Transurethral Lithotripsy of Ureteral Stone

Introduction: at present, different holmium: yag laser caliber for endoscopic stone treatment are used, which includes 200, 365, 500 and 1000 mm fiber. currently there are not enough studies to compare the performance of these fibers. in this retrospective investigation the outcome of 200, 365 and 500 mm fibers of laser ho yag in transurethral lithotripsy of ureteral stone evaluated. methods: seventy-four subjects with mean age of 35.3 ± 5.4 years old treated by endoscopic laser management from january 2016 to june 2017. the main purpose of investigation was to evaluation mean operation time(mot), stone free rate (sfr) and complications of 200 mm, 365 mm and 500 mm fibers of laser ho yag in transurethral lithotripsy. results: mot and sfr were significantly different in 500 mm laser caliber (p = 0.046, p = 0.029, respectively). there was no remarkable difference between the three groups in this regard. conclusion: based upon our data, the clinical potency of the ho: yag laser was great in all three fiber calibers. the most important results of this comparison were the significantly higher sfr with increased laser caliber.