Active clinical trials for "Kidney Calculi"

To evaluate the efficacy and stone free rate of placebo versus tamsulosin as medical expulsive therapy post-SWL in patients with renal stone less than 20 mm

The purpose of this study is to evaluate the effect of ALLN-177 to reduce urinary oxalate excretion in patients with recurring kidney stones and enteric or idiopathic hyperoxaluria.

Research Problem: Shock wave lithotripsy (SWL) dramatically changed the management of renal and ureteral calculus disease. In vitro studies suggest that progressive increase in lithotripter energy output voltage could produce the best overall stone comminution in comparison with constant or deescalating energy output. However, it is possible that the beneficial impact of slow rate SWL on comminution of stones and stone free rates has masked any marginal benefits for energy output escalation. The Escalating SW method adds the benefit of less renal tissue injury. Research Significance:The present study will signifies and evaluates the stone free rates of three groups of patients with renal stones treated with different SWL energy outputs (Escalating, Constant and Reduction energy output). Research Objectives: The aim of this research project is to study the effect of dose adjustment strategies on success rate of Shock Wave Lithotripsy in the clinical setting and to optimize the conditions for successful Shock Wave Lithotripsy. Research Methodology: This clinical trial will be conducted at a tertiary care university hospital. 150 patients referred to the Shock wave lithotripsy unit will be evaluated for eligibility to be randomized into three groups (Dose Escalation, Dose reduction and constant dose). Parameter of the three groups will be compared to detect the treatment difference.

The purpose of this study is to compare the analgesic efficacy and side effects induced by administration of two different infusion rates of remifentanil, 0,05 mcg/ Kg/ min versus 0,1mcg/ Kg/ min, in order to determine which one is the most appropriate analgesic treatment to face extracorporeal shock wave lithotripsy.

The investigators will investigate the safety and effectiveness of an Iranian traditional medicine regarding its ability to dissolve existing kidney stones. Calcium stone formers will be recruited for a 12 week trial. Each subject will receive Lapis judaicus or placebo in random order. End points are changes in urinary chemistries and stone burden by Ultra sonography / CT scan. It will be used in proven calcium stone forming adults who are not pregnant. This phase is a double blind, randomized, placebo controlled Entry, first and 12 week 24 hour urine supersaturations, pH and sodium determinations will be collected. Entry and final stone quantification Ultra sonography / CT scan will be performed. End points will be changes in urine chemistry/supersaturation and stone quantitative stone volume.

This prospective, randomized study is aimed to assess the efficacy and safety of paravertebral block compared to epidural anesthesia for percutaneous nephrolithotomy. The investigators suppose that paravertebral block is not inferior in controlling the perioperative pain for percutaneous nephrolithotomy compared to epidural block.

The purpose of this study is to determine if preemptive B&O suppository placement will decrease post-operative pain in patients undergoing ureteral stent placement.

compare the efficacy of of ultrasound guided SWL versus dissolution therapy versus combined SWL and dissolution therapy in management of 1 - 2.5 cm renal stones.

The purpose of this study is to determine which type of percutaneous nephrolithotomy is better in large kidney stones

Patients with large or otherwise complex renal calculi are commonly treated by percutaneous nephrolithotomy (PNL; PERC). PERC requires the creation of an approximately 10 mm channel through the renal parenchyma, into the intra-renal collecting system, in order to effect stone fragmentation and extraction. Although the nephrostomy tract is confined to a small fraction of the renal parenchyma (approximately 1%), the trauma associated with the creation of the tract will affect blood flow and oxygen delivery to regions beyond the immediate site of injury. It is possible that this could result in a significant functional renal impairment. There are several reports describing the effect of PERC on renal function, but interpretation of these studies is difficult, due to a lack of uniformity in patient selection and variability in the timing of peri-operative evaluation. Recent data from the investigators' lab, obtained from a porcine model, suggest that, acutely, PERC causes a significant decrease in renal function as measured by para amino hippurate (PAH) clearance. The purpose of this study is to determine, in a rigorous and standardized fashion, the acute effects of PERC on renal function, as measured by nuclear renography.