View clinical trials related to Ureteral Calculi.
Filter by:The aim of this study was to evaluate the role of flexible cystoscopy in preventing malpositioning of the ureteral stent after laparoscopic ureterolithotomy in male patients. From April 2009 to June 2015, 97 male patients with stones >1.8 cm in the upper ureter underwent intracorporeal double-J stenting of the ureter after laparoscopic ureterolithotomy performed by four different surgeons. In the last 50 patients who underwent laparoscopic ureterolithotomy flexible cystoscopy was performed through the urethral route to confirm the position of the double-J stent, while in the first 47 correct positioning of the stent was confirmed through postoperative KUB.
The study will be a prospective randomized double-blind placebo-controlled trial of mirabegron for medical expulsive therapy (MET) in patients with a CT (Computed Tomography) scan-proven ureteral stone between 4 to 10 mm undergoing expectant management.
One of the most effective strategies to decrease radiation exposure during ureteroscopy is to use low dose. However, the quality of the image obtained is inferior to full dose image. The main concern is to maintain the stone free and complication rate despite the inferior quality of image obtained. Our aim was to evaluate if reducing the dose of fluoroscopy to ¼ instead of full dose would impact in a reduction of total radiation exposure despite a possible increase in fluoroscopy time. Also, if this strategy would impact in operation time, stone free rate and complication rate of unilateral semi-rigid ureteroscopy for ureteral stone treatment due too less than optimal fluoroscopy image. All patients over 18 years old diagnosed with ureteral stone from 5 mm to 20 mm in diameter by CT scan were counseled regarding their treatment options. Patients who failed spontaneous passage or medical treatment or chose endourologic treatment were included in this study. Patients with abnormal urinary anatomy such as horseshoe kidney, pelvic kidney or duplex system were excluded from the study.
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.
This is a single institution, prospective study to evaluate the prognostic significance of renal and bladder ultrasound with ureteral jet assessment and its utility to evaluate the spontaneous stone passage rate of 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".
Urolithiasis is one of the most common urological diseases. The risk of urolithiasis is estimated to be between 5% and 12% all over the world with increased incidence in male rather than female (2:1) respectively . Ureteral stones account for 20% from all urinary tract stones, more than 70% of the ureteral stones found in the lower third of the ureter . The incidence of urinary stones has been increasing day by day. Medical expulsive therapy (MET) of ureteral stones is the investigators' concern in this study. Stone location, size, number, ureteral spasm, mucosal edema or inflammation and ureteral anatomy are the factors affecting passage of the ureteral stones. So, MET is based on mechanism that stone passage is facilitated by the relaxation of ureteral smooth muscle , increasing hydrostatic pressure proximal to the stone and decreasing exciting edema . There are many oral medication could be used as MET such as adrenergic blockers, calcium channel blockers, prostaglandin synthesis inhibitors, glyceryl trinitrate and steroid treatment . Calcium-channel blockers and adrenergic α-antagonists are the main that has been proposed to enhance stone passage as expulsive medical therapy. Cyclic nucleotides are degraded by phosphodiesterases enzymes (PDEs). So using of PDE inhibtors may play role in relaxation of smooth muscle of the ureter. A study was done for evaluation of three PDE5 inhibtors, sildenafil , vardenafil and tadalafil, they found that PDE5 inhibitors can reverse the tension of isolated human ureteral smooth muscle via cGMP-mediated pathways.
This study will be conducted to compare the success and complication rates of ureteroscopy, and shockwaves lithotripsy for treatment of upper ureteric stones ≤1 cm.
Ureteral calculi, commonly known as kidney stones, are a frequent cause of Emergency Department (ED) visits. These stones can get caught in the ureter (the tube connecting the kidney to the bladder) and cause symptoms including pain, nausea, and vomiting. As long as the obstructing stone meets certain conditions and the patient isn't too sick, the patient is usually sent home to try and pass the stone without surgery. This treatment is known as medical expulsive therapy (MET), and routinely involves the use of a drug called tamsulosin, which relaxes the smooth muscle of the urinary system to help the stone pass. Silodosin is a drug in the same class of tamsulosin, but which is thought to have a more selective action and a quicker onset, which would theoretically make it better for aiding in kidney stone passage. The purpose of this study is a head-to-head, blinded comparison of these two drugs to see how quickly they result in stone passage. Subjects are patients presenting to the ED with acute kidney stone shown by CT scan, and who are appropriate for MET. The main study intervention is randomization to receiving either tamsulosin or silodosin. The hypothesis is that silodosin will have decreased time to stone passage compared to tamsulosin. Subjects who qualify and consent are randomized to a two-week course of either silodosin or tamsulosin. They are also given prescriptions for standard of care medications for pain and nausea, as well as a pain diary. They receive a follow-up phone call after one week to remind them of their follow-up appointment, ask about adverse events, and determine if their stone has passed. They have a follow-up visit with study staff at the end of their two week treatment to collect their pain diary, pill count, adverse events, and to determine if their stone has passed. Study participation ends after this follow-up visit.
Extracorporeal shockwave lithotripsy (ESWL) for urinary stone is common and widespread nowadays. Approximately 80% of urinary stones are treated by ESWL. Traditionally distal ureteric stones are treated with ESWL in the prone position. However, as some patients cannot tolerate lying in the prone due to medical illness such as chronic obstructive pulmonary disease (COPD), some authors have reported using the supine approach of ESWL for treatment of distal ureter stones. No serious complications had developed in the patients who underwent supine approach. Only minor complications such as self-limiting blood in the urine, painful passage of urine, or local pain that had responded to oral painkillers. There were no serious complications encountered in children as well. In the most recent retrospective review by Tolley et al, they had revealed that patients who had underwent supine ESWL for distal ureteric stones had an improved stone-free rate compared with the traditional prone approach. Patient with radio-opaque distal ureteric stones (stones below the sacroiliac joint) on KUB X-ray, who have opted for ESWL treatment, are randomized into two groups: one undergoing ESWL in the supine position and the other undergoing ESWL in the prone position. Patients will be observed for two hours after ESWL before being discharged. Oral painkillers as necessary will be provided to the patient. The patients will have a KUB Xray at 2 weeks post-ESWL, and then monthly afterwards if required. If there are residual stones at the 2-week follow-up, the patient will be offered ESWL again. Patients are free to withdraw from the study at any time and will continue to be managed as per usual. The investigators aim to have 130 patients, with 65 patients in each group with an interim analyses to be performed when 66 patients have been recruited (33 patients in each group).