Mp43-11 Comparison of the Efficacy of a New Pulsed Thulium: Yag Laser Versus a Pulse-Modulated Holmium: Yag Laser on Dusting Lithotripsy: In Vitro Analysis Using an Optical Motion Capture System

You have accessJournal of UrologySurgical Technology & Simulation: Instrumentation & Technology II (MP43)1 May 2024MP43-11 COMPARISON OF THE EFFICACY OF A NEW PULSED THULIUM: YAG LASER VERSUS A PULSE-MODULATED HOLMIUM: YAG LASER ON DUSTING LITHOTRIPSY: IN VITRO ANALYSIS USING AN OPTICAL MOTION CAPTURE SYSTEM Takashi Yoshida, Kazuyoshi Nakao, Kenta Takayasu, Keiki Chuman, Takahiro Nakamoto, Tadao Matsunaga, and Hidefumi Kinoshita Takashi YoshidaTakashi Yoshida , Kazuyoshi NakaoKazuyoshi Nakao , Kenta TakayasuKenta Takayasu , Keiki ChumanKeiki Chuman , Takahiro NakamotoTakahiro Nakamoto , Tadao MatsunagaTadao Matsunaga , and Hidefumi KinoshitaHidefumi Kinoshita View All Author Informationhttps://doi.org/10.1097/01.JU.0001008720.96896.83.11AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: The aim of this study was to evaluate the dusting efficacy of the new pulsed thulium: yttrium-aluminum-garnet laser (p-Tm: YAG), not a superpulse thulium fiber laser, with that of the conventional holmium: YAG (Ho: YAG) laser with a pulse modulation technology. METHODS: We conducted an in vitro experiment using 20 canine struvite stones, with an average of 24.31 mm3. We set the laser energy at 0.2 J×30 Hz, with short-pulse mode (SP), long-pulse mode (LP), or MOSES distance mode (MOSES) for the Ho: YAG laser system (Lumenis Pulse 120), and SP and LP for the p-Tm: YAG system (Revolix HTL). The endpoints were the mean operative time (i.e., time to ablate the stone into particles of<1 mm), laser irradiation time, total laser energy, total endoscopic working distance evaluated by an optical motion tracking system (OptiTrack Flex3), and velocity of the endoscope tip movement. We performed the experiments four times for each laser setting. RESULTS: p-Tm: YAG-SP/LP demonstrated the fastest operative time, followed by MOSES and Ho: YAG-SP/LP (p<0.001). Ho: YAG-LP showed the longest irradiation time, followed by Ho: YAG-SP, MOSES, and p-Tm: YAG-SP/LP (p<0.001). Ho: YAG-LP showed the highest total laser energy value, followed by Ho: YAG-SP and MOSES, and p-Tm: YAG-SP/LP (p<0.001). The working distance of the endoscope was longest for Ho: YAG-SP and shortest for p-Tm: YAG-SP/LP (p<0.001). Ho: YAG-LP and p-Tm: YAG-SP/LP showed relatively lower velocities of endoscope movement compared to the other lasers. CONCLUSIONS: In dusting lithotripsy, the new p-Tm: YAG showed improved surgical efficacy compared to the conventional pulse-modulated Ho: YAG laser. Further clinical investigation is needed. Source of Funding: none © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 211Issue 5SMay 2024Page: e698 Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Takashi Yoshida More articles by this author Kazuyoshi Nakao More articles by this author Kenta Takayasu More articles by this author Keiki Chuman More articles by this author Takahiro Nakamoto More articles by this author Tadao Matsunaga More articles by this author Hidefumi Kinoshita More articles by this author Expand All Advertisement PDF downloadLoading ...