Active clinical trials for "Urolithiasis"

The aim of the study is to evaluate the predictors of success of oral dissolution therapy in radiolucent renal stones in a large series of patients from a tertiary referral center in order to define the optimum case scenarios where oral dissolution therapy could be implemented.

The purpose of this study is to assess if patients treated with silodosin will have a higher spontaneous passage rate of their ureteral stone than those treated with placebo.

The purpose of this study is to assess whether one of two ureteral access sheaths is safer for patients undergoing ureteroscopy. Both sheaths are FDA approved devices and commercially available. The investigators will compare the ability of sheaths to access the kidney through the ureter and will compare damage done to the ureter after completion of the procedure. Access sheaths are standard of care for this procedure; this study seeks to optimize outcomes for patients. Patients undergoing ureteroscopy who do not have ureteral stents in place and who have not had an ipsilateral procedure within 90 days will be recruited and consented.

Patients with recurrent calcium oxalate stones undergoing endourological procedures for renal stones at our institution from June 2013 to June 2014 were considered eligible for enrolment. Enrolled patients underwent a baseline unenhanced CT scan before the urological procedure; after endoscopic removal of their stones, the patients were instructed to drink at least 2 L/day of a hypotonic, oligomineral water low in sodium and minerals (fixed residue at 180°C <200 mg/L) for at least 12 months. Finally, the patients underwent a follow-up unenhanced CT scan during hydration regimen.

The aim of the study is to compare URS lithotripsy performed with Holmium:YAG laser and Thulium Fiber Laser. The study is designed as a prospective clinical randomised trial, where the study participants are randomised to either URS with Holmium:YAG laser or URS with Thulium Fiber Laser. The outcomes of the URS procedures are compared for the two treatment arms.

To evaluate and compare the results of conventional and stepwise shock wave lithotripsy treatment modalities in pediatric urinary lithiasis.

This study will include patients aged between 18 and 70 who will undergo retrograde intrarenal surgery (RIRS) due to renal stone(s). A total of 80 patients (male or female) will be recruited, and will be randomized into 2 groups consisting of 40 patients in each group. The first group of patients will undergo RIRS with a ureteral access sheath (UAS) positioned prior to surgery; and the second group will undergo RIRS without UAS. As use of UAS decreases the pressure in the renal pelvis during RIRS, it is aimed to evaluate whether using UAS or not affects the level of pain felt by patients in the postoperative period.

Purpose: The aim of this present study is to compare the result of fluoroscopy, ultrasonography (US) and US combined with fluoroscopy in the guidance of minimally invasive percutaneous nephrolithotomy (MPCNL). Methods: The investigators will enroll 450 patients who are candidates for MPCNL in our study. By simple random sampling technique, patients will be assigned to three 150-patient groups (group 1, US-guided MPCNL, group 2, fluoroscopy-guided MPCNL and group 3, US combined with fluoroscopy-guided MPCNL). In addition to approaches in guidance of MPCNL, the rest of the procedure is the same in all three groups.The end point of the study is the comparison of outcome of procedure including stone free rate, transfusion rate, operation time, access time, length of stay and complications.

Kidney stone disease affects almost 10% of overall population, often requiring a surgical intervention. Currently, shock wave lithotripsy is considered a first-line treatment option for patients suffering from symptomatic kidney stones smaller than 2.0 cm, providing reasonable stone-free rate. Actually, the outcomes from SWL vary largely due to several factors including stone burden, stone density, stone-skin distance (SSD), and patient's body habitus. Furthermore, the imaging exam modality (i.e. ultrasound versus computed tomography scan) performed to assess the presence of residual fragments also impacts on SWL outcome analysis. We aim to perform a well-controlled prospective evaluation of all variables that may impact on fragmentation and clearance of lower pole calculi after SWL. These variables are assessed exclusively by a noncontrast computed tomography scan (NCCT), eliminating the necessity of an intravenous urography to study renal collecting system anatomy; an imaging exam that is not routinely performed anymore for kidney stone patients.

Despite an overall reduction in the perioperative complication rate, post operative pain management after ureteroscopic removal of stones (URS) remains a major factor delaying discharge of patients. The investigators hypothesize that perioperative usage of intranasal ketorolac will provide a reduction in post operative opioid requirements, better post operative pain control, higher anesthesia satisfaction and faster recovery.