Active clinical trials for "Kidney Calculi"

This study investigates the efficacy and the safety of Lanthanum Carbonate for the reduction of urinary oxalate excretion in patients with secondary hyperoxaluria and nephrolithiasis.

The purpose of this study is to determine if adding a spinal block (medicine that will numb parts of the body to block pain) along with standard pain control at the incision site will decrease the need for narcotics for pain management and decrease the percentage of patients requiring hospital admission for pain control during postoperative , in-hospital, care after a percutaneous nephrolithotomy (PCNL) (surgery to remove kidney stones), commonly called PERC.

To compare the efficacy of Ultrasound guided thoracic paravertebral block versus ultrasound guided caudal epidural block in pediatric patients undergoing percutaneous nephrolithotomy

The authors hypothesize that the RIRS using 150-microm Tm-fiber laser is superior than fiber with larger diameters, as 200-microm Tm-fiber laser or 200-microm holmium fiber laser, in such points as follows: decreasing surgery time and laser-on time due to possibility of 4.3 fold ablation efficacy increase, which has been shown by Andreeva et al.; increasing the flexible ureteroscope tip deflection lower pole stones availability; decreased risk of complications and a better irrigation and visualization due to better irrigation with smaller fiber; increasing of lithotripsy efficacy and laser beam density by lowering of beam focal spot due to using of lesser fiber diameter

Renal stones are one of the most common urological problems and there are multiple methods for their management such as percutaneous nephrolithotomy, mini and ultra-mini percutaneous nephrolithotomy, flexible ureteroscopy and laser lithotripsy, and extracorporeal shock wave lithotripsy. percutaneous nephrolithotomy is the treatment of choice for the management of renal calculi, in spite of the increasing stone clearance rate, the complication rate of this procedure is relatively higher.

Ureteroscopy (URS) is minimally invasive procedure for management of renal stones. URS is often involves concomitant of an indwelling ureteral stents. Placements of these stents include pain, bladder irritability, infection, migration, encrustation and stones. Pain is one of most significant problem of ureteral stents. There are no satisfactory measures to deal with this problem. A novel approach to manage the pain is to load a drug onto ureteral stent and deliver the drug into the urinary tract at controlled release rate. Lidocaine has been proven to be effective for management of the pain associated with interstitial cystitis. This agent has the potential for management of post-URS pain.

Nephrolithiasis is a disease that strikes roughly 10% of the Italian population and its incidence in industrialized countries is on the increase. The most common form of the disease (80%) is Idiopathic Calcium Nephrolithiasis (ICN) with calcium-oxalate (CaOx) and/or calcium-phosphate (CaP) stones. The etiopathogenesis involves both genetic and acquired factors, the interplay of which leads to urinary biochemical anomalies at the root of stone formation. The elements and urinary compounds involved are known as "urinary stone risk factors". The risk factors for CaOx stones consist of low urine volume, hypercalciuria, hyperoxaluria, hyperuricosuria, hypocitraturia and hypomagnesuria. In the case of CaP stones, the hyperphosphaturia and pH parameters are of particular importance; a pH>7 promotes the formation of stones prevalently composed of phosphates, while a pH of between 6 and 7, associated with a volume <1l/day, can raise CaP supersaturation to a dangerously high level and lead to the formation of mixed CaOx and CaP stones. For uric acid stones, the elements involved are hyperuricosuria and pH<5.5. In general, the most prevalent alteration in ICN is hypercalciuria (50%). Hypertension and obesity are also social diseases with important epidemiological similarities to nephrolithiasis. These affinities have led to the search for a common pathogenic moment. As far as hypertension is concerned, various studies have demonstrated high calciuria in hypertensives with a linear relationship between 24-h calciuria and arterial blood pressure. The incidence of stone disease is greater in hypertensives than in normotensives and, by the same token, the incidence of hypertension is greater in stone formers than in non stone formers, but it is not clear whether nephrolithiasis is a risk factor for hypertension or vice versa. Moreover, a linear relationship exists between calciuria and natriuria, where the calcium is the dependent variable, with a much steeper slope of the straight line in stone formers and hypertensives compared to controls. It has, in fact, been demonstrated that to reduce calcium, it is more efficacious to reduce sodium intake as opposed to calcium intake. Finally, BMI and body weight are independently associated with an increase in stone risk even though, due to a number of bias (limited weight categories, low number of obese persons in the study populations, no control group, no recording of food intake) the studies published failed to be conclusive. In the final analysis, stone disease, arterial hypertension and excess weight/obesity prove to be closely interconnected and it is possible to intervene with targeted diets aimed at reducing the risk of illness and death from these diseases. Among such dietary approaches, the reduction of sodium chloride in food, increased hydration and an increased intake of foods with an alkaline potential seem to play an important role. For many years now, the investigators research unit has been involved in projects, partially financed by the Italian Ministry of University and Research (MIUR), geared towards studying the effects induced by dietary changes in patients with calcium stone disease. The aim of the present project is to analyse in depth the relationship between stone disease, hypertension, body weight and water and salt intake both in the general population of the area of Parma (where historically and by gastronomic tradition, the usual diet tends to have a high salt content) and in a selected population of stone formers and hypertensives not under treatment. A representative sample of the population of the area of Parma will be studied, divided on the basis of weight category, in order to assess water and salt intake and relationships with the presence of hypertension, and a sample of normal and hypertensive stone formers randomized to receive for one year either water therapy+low salt diet or water therapy alone.

More specifically, the present invention relates to a 'Herbal Preparation' that is useful for Treatment of Renal calculi Reduction in the stone size & surface area The expulsion of stone Decreased need of Analgesic(Antiinflammatory Effect) Stops the recurrence and reformation of renal

High amounts of calcium in the urine (hypercalciuria) can cause development of kidney stones in children. Treatment for these children includes plenty of fluids, a low-salt diet and medications such as potassium citrate. A major advantage of potassium citrate, as compared to hydrochlorothiazide, is its lack of side effects. One problem the researchers and others have observed is that some children continue to form kidney stones despite correction of hypercalciuria with potassium citrate. One possible explanation is that in some individuals potassium citrate therapy results in an excessive elevation of urine pH, a situation that may predispose to calcium phosphate stone formation. In this study, the researchers will study the effects of potassium citrate on urine chemistries and acid-base balance in three groups of children aged 5-17 years: children who are hypercalciuric stone formers; healthy children without a history of hypercalciuria or kidney stones. Particular attention will be paid to try to identify those who develop a very high urine pH (>8) and the factors leading to this metabolic reaction. The researchers will try to learn whether it is the child's characteristics, the disease manifestations, the dose of the drug, or a combination of the above which may be the cause of the development of very alkaline urine. Based on the results, the researchers hope to be able to better "tailor" the individual treatment for each child with kidney stones.

Efficacy of tranexamic acid on blood loss during percutaneous nephrolithotomy. a double-blind, placebo-controlled randomized clinical trial.