Active clinical trials for "Calculi"

The investigators aim at this study to prospectively assess procedure-related outcomes after RIRS for renal calculi less than 20 mm, including stone free rate (SFR), predictors of successful outcome, complications types/rate, readmission rate and the need of auxiliary procedures. In addition, patient-reported outcomes after this modality of intervention are going to be assessed.

The aim of the present study to perform a full cost analysis for the complete clearance of calyceal stones by retrograde intrarenal surgery (RIRS) and percutaneous nephrolithotomy (PNL) for the treatment of lower calyceal stones between 1 and 2 centimeters (cm) in size.

The objective of this study is to evaluate the influence of low-calorie diet on serum and urinary metabolic parameters of obese adults with urinary calculi and lithogenic metabolic abnormalities.

Patients with a ureteral or kidney stone that causes symptoms, like pain, frequently have small kidney stones that don't cause symptoms. If these small kidney stones are determined to be asymptomatic (not causing any problems or pain), then most urologists will simply remove the symptomatic ureteral stone and leave the additional stones in the kidneys. However, symptomatic kidney stones started as small stones that didn't cause symptoms. This means that the small stones remaining in the patient's kidney may cause problems later. The purpose of our research is to test if removing small stones from the kidney prevents future stone episodes.

To prospectively compare non-complex biliary stone clearance using fluoroscopy/radiation-free direct solitary cholangioscopy (DSC) utilizing the SpyGlass™ system with non-complex biliary stone clearance using standard endoscopic retrograde cholangiography (ERC).

Shockwave lithotripsy (SWL) is a safe, non-invasive treatment for renal calculi. During SWL energy is focused on in order to break kidney stones and this energy can be varied in size from a narrow (or small) focal zone to a wide (or large) focal zone. This is a multi-centered, randomized study comparing the single treatment success rates of narrow and wide focal zones during SWL.

ERCP plays an important role in management of common bile duct stones. Herein the investigators compare preoperative against intraoperative ERCP. 210 were included but only 198 patients were randomly divided into two groups; PES/LC (100 patients) and LC/IOES (98 patients). The total hospital stay were significantly shorter in the group of LC/IOES

Approximately 10-15% of all patients with gallstones have coexisting common bile duct (CBD) stones. However CBD stones can also be formed in the absence of gallbladder stones. The current standard of treatment for calcular obstructive jaundice is endoscopic removal of the stones. Endoscopic sphincterotomy (ES) is widely accepted as the treatment of choice for patients with CBDS. Stone extraction is successful in up to 97% of patients The time interval between ERCP and laparoscopic cholecystectomy (LC) is a matter of debate that may vary from days to months. Some retrospective and other prospective studies have investigated this issue without sharp clue or definite conclusion This study planned to compare early LC (within admission) versus late LC (after 1 month) after ERCP as regard technical difficulties and surgical outcomes.

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.

A thin tube, called a ureteral stent, is inserted into the ureter and is commonly used as treatment of urinary stone disease. Stents are designed to help provide drainage of the kidney in the setting of an obstructing stone, or postoperative swelling of the ureter. Though their presence is only temporary, stents are associated with a significant amount of patient discomfort and bother, which can negatively impact overall satisfaction. Over the past decades, there have been refinements in stent technology and usage philosophy. Smaller and softer stents are now available for use in patients, though studies evaluating the relative benefits have been conflicting. The investigators aim to evaluate the effect of stent size and composition upon outcomes after the treatment of stone disease, including patient comfort and satisfaction.