MP03-20 DUSTING EFFICIENCY COMPARISON BETWEEN MOSES TECHNOLOGY OF HO:YAG LASER AND SUPERPULSE THULIUM FIBER LASER

INTRODUCTION AND OBJECTIVES:At present, the Ho:YAG laser is the most commonly used laser for treating urolithiasis. A new technology of the Ho:YAG laser (Moses technology) was designed to increase ablation efficiency and to reduce stone retropulsion. Recently, a thulium fiber laser (TFL) has been suggested as an alternative laser source, with a potential for higher ablative efficiency and lower retropulsion. The aim of this study was to compare the efficiency of stone dusting between a Ho:YAG laser with Moses technology and a SuperPulse TFL.METHODS:A SuperPulse TFL generator was compared to a Ho:YAG laser generator with Moses technology. 200 µm fibers were used in all experiments. Laser lithotripsy was performed with a flexible ureteroscope (Pusen) for direct vision and fiber control. Uric acid stones were used in this study. Irrigation pressure was 40 cm H2O. Lithotripsy was performed in a specially constructed vessel of 13 mm in diameter, with 2 mm holes drilled in the walls at a height of 40 mm to allo...