Active clinical trials for "Calculi"

The aim of this study was to identify some risk factors of failure of surgical management of common bile duct stones, in our center between 2007 and 2019.

The aims of this study were to investigate what measures were taken when common bile duct stones (CBDS) were found intraoperatively in Sweden during the period May 2005 to December 2009 by using data from this population-based nationwide registry, and analyze the outcome in terms of complications and success rates of bile duct clearance in relation to various stone sizes and interventions used. In order to further characterize the natural course of CBDS of various sizes, particular interest was focused on patients with positive findings where no peroperative measures to clear the bile ducts were taken or planned postoperatively.

The goal of this observational study is to analyse the occurence of urinary calculi after bladder augmentation in children: location of the calculi (kidney or bladder) type of bladder augmentation with higher rate of urinary calculi and why Find risk factors of urinary calculi in bladder augmentation (age, sex, other bladder procedures..)

Gallstone disease affects over 20 million Americans. Among patients with gallbladder disease, the prevalence of choledocholithiasis (stones in the bile duct) is estimated to be 10-20%. Endoscopic retrograde cholangiopancreatography (ERCP) is considered the standard of care for removing stones in the bile duct utilizing a variety of conventional methods including biliary sphincterotomy, sphincteroplasty, extraction balloon, retrieval basket, and mechanical lithotripsy. After removal of stones from the bile duct, an occlusion cholangiogram is usually performed to confirm complete bile duct clearance. However, cholangiogram can miss residual stones in 11- 30% of cases - especially in the setting of a dilated bile duct, large stones, severe pneumobilia, juxtapapillary diverticulum, primary sclerosing cholangitis, and after lithotripsy (mechanical, electrohydraulic, or laser). The approach to patients with choledocholithiasis requires careful attention because missed bile duct stones can cause recurrent biliary symptoms, pancreatitis, cholangitis, and has significant cost implication with the need for repeat imaging and/or procedures.

Kidney stones cause severe pain. Patients with a stone lodged in the ureter (the tube that drains the bladder), require urgent treatment with a stent to relieve the blockage. This tube, or ureteral stent, gives the patient relief until they can have their stone treated. This study is to evaluate a new type of ureteral stent to relieve pain from kidney stones. This stent is designed to drain the kidney and unlike other ureteral stents, is also designed to widen the ureter to help the stone pass on its own.

The purpose of this research is to assess the role of non-contrast helical computerized tomogram in predicting the treatment outcome of upper ureteric stone by extracorporeal shock wave lithotripsy (ESWL).

This study will use magnetic resonance imaging (MRI) to identify brain regions involved in solving algebraic math problems. It will examine brain activation according to the level of difficulty and the number of steps required to solve the problem. This information will help identify a possible correlation between problem-solving strategies and patterns of brain activation. Undergraduate or graduate students between 19 and 36 years of age who have completed at least 2 years of college, have had at least one college course in integral calculus, and who have no history of neurological disease may be eligible for this study. Candidates will be screened with a medical history, including psychiatric and neurological information. Participants will be asked to mentally solve a variety of integral calculus problems while undergoing MRI scanning, a procedure that uses a strong magnetic field and radio waves to produce images of structural and chemical changes in the brain. During the scan, the subject lies on a table in a narrow cylinder (the scanner) containing a magnetic field. A problem and possible solution are presented to the subject, who presses a button to verify if the answer is correct. At the end of the test, the participant completes a follow-up questionnaire to determine the problem-solving strategies used.

The goal of this observational study is to compare the use of Airseal versus a standard insufflation, in children who underwent laparoscopic cholecystectomy, between January 2021 and December 2022. The main questions it aims to answer are: amount of analgesics consumed postoperatively mean digital pain scale Data are directly extracted from patients medical files. The investigators will compare the Airseal group (A group) to the Standard insufflation group (S group) to see if the A group consumes significatively less analgesics and are less painful than the S group.

Background: The exit strategy after ureteroscopy for stone treatment remains a topic for discussion. Current EAU guidelines on urolithiasis state that postoperative stenting is indicated in patients at increased risk of postoperative complications. Stenting is not considered necessary in all other cases, and after uncomplicated procedures. Objective: To analyse the postoperative ureteral stenting strategy in clinical practice looking at the indication, type of stents used and the duration of stenting after ureteroscopy for stone treatment. Furthermore, the investigators will examine in what setting the stents are being removed postoperatively. Study design: This study is a prospective, observational, international, multicentre registry study executed by uCARE. Study population: All patients >18 years with a ureter or renal stone who are planned for ureteroscopic treatment by semi-rigid and/or flexible ureteroscopy are eligible for this study.

Authors want to investigate the usefulness of flexible cystoscopy in performing laparoscopic pyelolithotomies and ureterolithotomies by comparing operative results of a single surgeon's experience.