Active clinical trials for "Ureteral Calculi"

comparative study of two treatment modalities (ureteroscopy and extracorporeal shock wave lithotripsy) in management of upper third ureteral calculi

The present study aims to investigate the relative efficacy, safety and risk of a single-dose prophylaxis in otherwise healthy adult patients undergoing ureteroscopic procedures for ureteral stones.

Urolithiasis is a universal problem, a large part of patients will be affected by multiple stones throughout their lifetime, with estimated recurrence rates of 75% within 20 years. The high recurrence rate requires an increasing amount of imaging follow-up. US-NCCT real-time fusion (Fusion) enables lesion assessment and follow up using both modalities as reference for each other. Our study proposes a novel approach for short term follow up of patients using Fusion instead of repeat NCCT exams. the goal of the study is to create an initial proof of concept that Fusion is effective for follow up of known urinary stones. the study is a prospective study on Patients with an obstructing ureteral stone found on a NCCT. Patients will undergo Fusion (using General Electric Logiq E9) after NCCT. The primary endpoint was the ability to locate the ureteral stone using US with guidance of the NCCT as a "Road Map".

We will performe a prospective randomized study to evaluate the effects of the addition of alfuzocine xl 10 mg once a day for the conservative treatment of selected ureteral stones. A total of 60 patients with distal ureteral calculi will randomly divide into two treatment groups: group A (n=30) who will receive only analgetic therapy(Dipyrone)and diclofenac i.m. 75mg and group B (n=30) who will receive the same therapy plus alfuzocin xl (10 mg/daily) for a maximum of 2 weeks.No significant differences will be between the groups for age, gender distribution and mean stone size measured in the single largest dimension at presentation.Randomization will be done only with the patients permission after they had read a summary describing the goals of conservative management and a description of the drugs they would be taking. Potential side effects and complications of the drugs were discussed. The expulsion rate will the primary end-point of this study.

Ureteric calculi are one of the most common reasons for frequent Urolithiasis. The estimated prevalence is 8-13% of all calculi. Medical expulsive therapy (MET) is recommended by the European Association of Urology (EAU) (2013) for 5-10 mm ureteric stones to facilitate stone passage. For MET, alpha blockers, mainly tamsulosin, have shown efficacy in several randomized controlled trials. The underlying pathophysiology of this therapy is supported by the presence and distribution of adrenoreceptors in the ureter. Blocking the action of alpha-1 receptors by pharmacological agents (alpha blockers), such as alfuzosin, terazosin, doxazosin, and, most typically, tamsulosin, results in the relaxation of the ureteric smooth muscle. Ureteroscopy (URS) is the most commonly performed procedure for the treatment of ureteral calculi, with a high (>90%) stone-free rate after a single treatment. Advancing a rigid ureteroscope into a non-dilated ureter may be difficult and cause complications. Ureteric dilatation may provide access to stones, but not in all cases, and ureteral mucosal injury up to perforation might occur.

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).

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.

Ureteral stone is a common disease with high prevalence and recurrence rate in Taiwan. Taiwan is located in subtropical zone, where urolithiasis is commonly seen. A national survey in Taiwan determined that 9.6% of the population suffered stones throughout their lifetime. Symptoms of ureteral stone include renal colic, hematuria, and urinary tract infection. Without proper treatment, ureteral stone could lead to renal function impairment such as acute kidney injury (AKI) or chronic kidney disease (CKD). There are several treatment options for ureteral stone, such as ureteroscopic lithotripsy (URSL), flexible urteroscopic lithotripsy (F-URSL), percutaneous nephrolithotomy (PCNL), extracorporeal shock wave lithotripsy (ESWL), and Medical expulsive therapy (MET). However, there are only few minutes from diagnosis of ureteral stone to possible treatment options explanation. It's difficult for patients to well understand all the details of possible treatments under such circumstances. Therefore, we design a patient decision aid (PDA) for unilateral ureteral stone to help patients understand all the treatment options. The PDA is standardized, written in plain language and patient-centered, with pictures attached.

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.