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NCT06746779
This study investigates the role of preoperative ureteral diameter measurements in predicting difficult access during retrograde intrarenal surgery (RIRS) in patients with kidney stones. A retrospective analysis was conducted on 234 patients who underwent RIRS, evaluating factors such as preoperative ureteral diameters (measured at distal, iliac, and upper ureteral levels via CT scans), stone size, patient demographics, operation duration, and surgical success rates. The findings aim to determine whether ureteral diameter measurements can serve as reliable predictors for surgical challenges, ultimately improving preoperative planning and patient outcomes.
NCT06741917
In the treatment of kidney stones and upper ureteral stones, flexible ureteroscopic lithotripsy has become the mainstream choice due to its minimally invasive nature and high safety. However, there is still no universal consensus on the use of prophylactic antibiotics before surgery. Taiwan, located in the subtropical region, is one of the areas in the world with a high incidence of urinary tract stones. Currently, there are no established guidelines for the use of prophylactic antibiotics before flexible ureteroscopic lithotripsy in Taiwan. This study aims to evaluate the differences between single-dose, different types of prophylactic antibiotics in generally healthy adult patients undergoing flexible ureteroscopic lithotripsy.
NCT06138704
There is a global increase in the prevalence of urolithiasis in children attributed to lifestyle changes, dietary habits, climate changes, childhood obesity, and the wider availability of ultrasonography. The rising incidence of the disease with its recurrent nature emphasizes the need for minimally invasive therapeutic options. Patients in whom RIRS has been performed in the last four years with increasing experience will be presented, and complications, stone-free rates, and technical details will be discussed. This retrospective Cohort study included children who underwent RIRS. Medical history, serum electrolytes, midstream urine culture, urinalysis, serum creatinine, complete blood count, and coagulation assessments were performed preoperatively. Ultrasonography (USG) was performed three months, 6 months, and 1 year after the procedures to evaluate stone recurrence and hydronephrosis. The investigators analyzed the stone-free rate ,complications, and the conversion to open procedure
NCT05269108
Aiming to reduce radiation exposure to patients and physicians, the investigators conduct this study protocol to evaluate the possibility of performing retrograde intrarenal surgery (RIRS) under direct visualization without fluoroscopy. the investigators will prospectively evaluate the outcome of fluoroscopy-free RIRS for renal stones in comparison with the standard technique. The investigators expected that the fluoroscopy-free technique has high safety and efficacy even in complicated cases.
NCT05738304
Several studies evaluated the benefit of a short-term external ureteral catheter (UC) compared to double-J (DJ) ureteral stent after flexible ureteroscopy (URS); the results were controversial. These studies had combined analyses of ureteral and renal stones with a high risk of selection bias. Studies comparing external UC and DJ stent after flexible URS for isolated renal stones are lacking. In the present study, the investigators will compare the outcomes of using a one-day external UC versus a DJ internal ureteral stent for ureteral drainage after retrograde flexible URS (retrograde intrarenal surgery "RIRS") for renal stones. The investigators aim to identify the best ureteral drainage method after RIRS regarding stone clearance, complications, and stent-related symptoms.
NCT05648877
Role Of Retrograde Intrarenal Surgery In Management Of Renal Stones: Single Center Experience
NCT05197088
Aim is to study if 1 week of pre operative tamsulosin would enable easier insertion of ureteral access sheath in primary retrograde intrarenal surgery for renal stone disease