View clinical trials related to Calculi.
Filter by:The purpose of this study is to compare the stone clearance rate treated with different drugs after ESWL in urinary calculus,These drugs are often used in urinary calculus,such as progesterone,tamsulosin,propantheline Bromide and nifedipine.In these study the investigators want to investigate different effect of these drugs use to treat urinary calculus after ESWL.
SWL is widely used in the treatment of patients with renal and ureteral calculi. Several factors determine the success of extracorporeal shockwave lithotripsy (SWL) for kidney stones: stone size, stone location within the collecting system, stone type, and the SWL machine used. Moreover, in some cases it is very difficult to focus on the stone because of its movement as a results of breathing. In order to prevent stone movement we want to use a bronchial blocker, processing a selective ventilation of the opposite side of stone location.
A total of 20 subjects presenting with urinary stone(s) in the kidney or ureter will be treated with an extracorporeal shockwave lithotripsy device to fragment the stones. Subjects will be followed for 14 days. If at the 14 day follow-up visit the subject continues to present with a stone size 4 mm or greater will have an option of retreatment or other intervention. If the subject consents to be retreated at this time, this subject will be followed up for another 14 days.
The purpose of this study is to investigate the lesions, clinical features and outcome in young children with melamine-related-calculus.
The purpose of this clinical study is to evaluate BackStop, a polymer-based device that is intended to be used during ureteroscopic lithotripsy to prevent retrograde stone migration. It is a water soluble polymer with reverse thermosensitive properties; the polymer exists as a liquid at low temperature (below 17 C) and rapidly transitions to a high viscosity gel at body temperature (i.e. in the ureter). BackStop is injected above the stones in the ureter and is intended to prevent retrograde migration of stones during ureteroscopic lithotripsy. Upon completion of the lithotripsy procedure, BackStop dissolves naturally or by irrigation. The study hypothesis is that a greater proportion of patients will experience no retropulsion of a kidney stone when BackStop is used versus no anti-retropulsion device when undergoing intracorporeal lithotripsy.
The objectives of the study are to assess the systemic exposure, safety and efficacy of three concentrations of OMS201 in subjects undergoing retrograde ureteroscopic removal of upper urinary tract stones.
Removal of bile duct stones can be challenging at ERCP, particularly, when the size of the stone is at least 1.2cm, and may require more than one ERCP session. Various techniques for removal of difficult bile duct stones include using a balloon to enlarge the opening of the bile duct (large balloon sphincteroplasty), mechanical lithotripsy or single-operator cholangioscopy guided laser lithotripsy techniques. There are currently no randomized trials comparing laser lithotripsy and sphincteroplasty techniques for the removal of difficult bile duct stones and the aim of this randomized trial is to determine which technique is superior in the removal of difficult bile duct stones.
The presence of plaque on tooth surfaces as a predictor of chlorhexidine side effects has not been evaluated especially because most studies utilized a previous disruption of biofilms in all dental surfaces before the beginning of rinsing. The purpose of this study is to compare staining and calculus formation after 0.12 percent chlorhexidine between previously plaque-free and plaque-covered surfaces by means of an experimental gingivitis model.
Tamsulosin (Flowmax)is approved by the FDA for the treatment for enlarged prostate. Several studies regarding the use of Tamsulosin for the treatment of lower kidney stones have been carried out in the non-Emergency Department setting. This study will compare Tamsulosin 0.4 mg with placebo in regards to rate and time of stone passing and will also look at amount of pain. The purpose of this study is to compare the usefulness of Tamsulosin versus placebo on time to stone passage and pain relief in Emergency Department patients with kidney stones.
Purpose: The purpose of the Stone Centre Serum and Urine Bank is to provide researchers with large numbers of serum and urine samples from kidney stone patients and controls for study of stone disease detection and treatment, and will take into account different genetic backgrounds, ages, and other patient factors to provide a broad sample size for the study of stone disease The Serum and Urine Bank will undoubtedly be an invaluable tool in the quest to understanding urinary stone disease. Objective: The objective of this research is to identify protein species or other compounds responsible for or contributing to kidney stone initiation and propagation.