الفهرس 
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Abstract
Over the last decade, SFR after RIRS was the main topic of research in order to precisely determine the success rate of this innovating technology in management of renal calculi. Aim of the work : We aimed at this study to prospectively assess procedure-related outcomes after RIRS for renal calculi less than 20 mm, including stone free rate, predictors of favorable outcome, operative room time (predictors), perioperative complications, impact of different preoperative and procedural settings on treatment outcomes, post-operative pain, unplanned visits and readmission after the procedures. In addition, we assessed the impact of drainage method after the procedure on patients reported outcomes using a validated questionnaire. Patients & Methods : Patients were recruited for participation in the study between January 2018 and December 2020. Out of 414 patients, 340 patients met the inclusion criteria and were eligible for participation in the study. Preoperatively, all patients were thoroughly evaluated by medical history and physical examination including body mass index (BMI), routine laboratory assessment. Results : In our study, favorable stone free outcome (No residual fragments at POD1& less than 4 mm residual fragments at POD1 which were cleared or asymptomatic at POM3) was noted among 288 (84.7%) patients. On multivariate logistic regression analysis, stone surface area (SA), stone volume (SV) and surgeon experience were independently affecting stone free status (p=0.02, 0.001 and 0.001, respectively). 67 (19.7%) patients developed post-operative complications. The majority (62 patients) was low grade complications (Grade 1 or 2) with post-operative fever as the most encountered complication (46 patients). Conclusion & Recommendations : Various treatment outcomes including procedure-related and patient-reported outcomes should be considered when sharing decision of optimal treatment modality with the patients. The high efficacy and lower rate and grade of complications have positioned RIRS as the treatment of choice for renal stones up to 20 mm. Different patients’, stone and procedural parameters should be clearly defined and shared when considering RIRS as the management option to optimize the outcomes and improve patient satisfaction.