This report examines the feasibility and the affectiveness of ureteroscopic holmium: YAG lasertripsy (URSL) for the upper ureteral stones. Patients and methods: 124 patients, at Binh Dan hospital from the Jan to August 2009, who were treated with URSL, using a 7.5 / 9.5 F Stortz semirigid tapered ureteroscope, and Dornier Holmium: YAG laser, under spinal anesthesia.