Mohammad Reza Jafari Shahdani - Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran
Behrouz Fattahi - Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran
Mohammad Ghasem Mohseni - Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran
Seyed Mohammad Kazem Aghamir - Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran

Introduction: Retrograde Intrarenal Surgery (RIRS) and Minimally invasive PCNL (also termed mini-PCNL or mini-Perc or mPCNL) mini-perch surgery are two methods of residual stone treatment. We aim to compare the results of mini-perch and RIRS to treat residual stones after PCNL with Hounsfield unit over ۱۰۰۰. In this retrospective cohort study patients with residual stones after PCNL with Hounsfield unit above ۱۰۰۰ or a stone-to-skin distance greater than ۱۰ cm divided into two groups of mini perch or RIRS. Methods: Total number of ۳۲ patients in the RIRS group (mean age ۳۸.۶۸±۸.۰۰) and ۳۵ patients in the mini-perc group (mean age ۴۲.۰۵±۱۳.۲۲) were studied. The hemoglobin loss (p-value=۰.۰۱), need for blood transfusion (p-value=۰.۰۴), hospital stay (p-value=۰.۰۰۶) and surgery time (p-value=۰.۰۰۱) were significantly lower in RIRS group. Results: Although the percentage of success (p-value=۰.۱۷) and Stone Free Rate (SFR) (p-value=۰.۴۰۱) were higher in the mini-perc group, it was not significantly different from RIRS. Complications in the mini-perc group were significantly higher than in the RIRS group (p-value=۰.۰۵). Conclusions: The RIRS method has no significant difference in comparison with mini-perc. RIRS have lower operation time, shorter hospitalization, and less complication.

Retrograde Intrarenal Surgery, Mini-perc, effectiveness, Percutaneous nephrolithotomy