Rirs Technique
The patients in this group were placed in the lithotomy position, and a
semirigid ureteroscope (Karl Storz 9-11F, Tuttlingen, Germany), followed
by a9.5-11-F access sheath (Boston Scientific, USA)were inserted with a
through a sensor guide (PTFE-Nitinol Guidewire with Hydrophilic Tip,
Boston Scientific, Marlborough, USA) under fluoroscopy control. The
stone was accessed using a flexible ureteroscope (7,95 F Olympus, USA),
and fragmentation was performe dusing Holmium YAG laser with 272-µm
laser fibers(Quanta System, Litho Holmium, YAG Laser, Turkey).Large
fragments were extracted using a 1.7 F retrieval basket (Zerotip, Boston
Scientific Corp, Natick, MA, USA).