[Comparison of Mosesᵀᴹ Mode and Conventional Laser in Transurethral Lithotripsy for Kidney Stones]

Transurethral lithotripsy (TUL) using holmium YAG laser has become the standard treatment for kidney stones. Mosesᵀᴹ technology, which delivers the laser with less energy loss, has been introduced and is reported to have advantages over regular laser in terms of shorter operation time and lithotripsy efficiency, but there are few reports from general hospitals. We retrospectively compared the perioperative and postoperative outcome, and complications of 28 cases of TUL using Mosesᵀᴹ mode performed from August 2021 to January 2023 at our hospital, and 25 cases of TUL using regular laser from August 2020 to July 2021. The median stone size was 11.9 and 10.9 mm, the median operation time was 103 and 105 minutes, and the 3-month stone-free rate was 88. 0 and 95.8% for Mosesᵀᴹ mode and regular laser, respectively. No significant difference was observed in the operation time. There was no difference in stone-free rate or complications either. The Mosesᵀᴹ mode group had significantly more cases of ureteral stent removal on the day after placement. In evaluating stone retropulsion on a 4-point scale, Mosesᵀᴹ mode cases showed significantly less retropulsion. TUL using Mosesᵀᴹ mode could be a useful option for treatment of kidney stones.