Conclusion
RIRS is an effective and safe surgical method in the treatment of renal stones. In our study, the presence of abnormal kidney anatomy, multiple stones, operative time, and residual stones were determined as independent predictive factors for complication development after RIRS whereas the presence of residual stones was the only independent predictive factor for major complications. MCCS and SCS are fast and easily applicable classification systems for grading RIRS-related complications.