View clinical trials related to Nephrolithiasis.
Filter by:This observational study aims to look at the connections between kidney stones, insulin resistance, and inflammation. The researchers hypothesize that people who form calcium kidney stones and have insulin resistance may have higher levels of inflammation because they have more visceral fat (fat around the abdominal organs). The study will recruit 20 people who have had calcium kidney stones but don't have diabetes, and 20 healthy people who haven't had kidney stones. All the participants will come to the research center at the University of Chicago Medicine. Participants will have a dual-energy X-ray absorptiometry (DEXA) scan to measure their visceral fat, and give blood and urine samples. The blood will be tested for insulin resistance, inflammatory markers, and other metabolic factors. The urine will be analyzed for substances that increase kidney stone risk. The main goal is to see if the kidney stone formers with insulin resistance have more visceral fat compared to those without insulin resistance and the healthy participants. The researchers will also compare inflammatory marker levels between groups, and look at how visceral fat, inflammatory markers, insulin resistance, and urine stone risk factors are related. The findings may help explain how kidney stones are connected to metabolic conditions like diabetes and cardiovascular disease. Researchers hope this information will help identify stone formers at risk early and develop preventive treatments in the future.
Neutrophils are first responders to any kind of threat the body faces: infection, severe trauma, cancer, surgery... They produce the cytokines, induct oxidative stress and de-granulate toxic proteins to kill pathogens. However the new mechanism related to the neutrophil extracellular traps release has been recognized as a new way of cell necrosis and has been called a NETosis. NETosis is a hugely important new mechanism of human immune responses also described in various forms of acute kidney injury (ischemic, toxic, autoimmune). In certain kidney diseases, neutrophils release NETs and induce cell necrosis. Whether neutrophils die along with NET release, and if they do die, remains under study and is most likely context dependent. Extracellular traps (ETs) can be released also by macrophages. The ETs formation as well as macrophages extracellular traps (MET's) especially in kidney disease are cytotoxic and elicit inflammation, contributing to necro-inflammation of the early-injury phase of acute tubular necrosis in anti-neutrophil cytoplasmic antibody-related renal vasculitis, anti-glomerular basement membrane disease, lupus nephritis. Finally, acute kidney injury-related releases of dying renal cells or ETs promote organ injuries - for example, acute respiratory distress syndrome. According to the recent review the term 'NET formation' has been proposed as a better term to use instead of 'NETosis'. The formation of neutrophil extracellular traps (NETs) has been recently recognized as a unique modality of pathogen fixation (sticky extracellular chromatin) and pathogen killing (cytotoxic histones and proteases) during host immune responses, as well as collateral tissue damage. Histones are potent mediators of injury in various cells. Indeed, extracellular histone induce microvascular endothelial cells and renal epithelial cells death in vitro, forms the pores that disrupt cell integrity and induce the cytolysis by their capacity of binding with membrane phospholipids and activation of inflammasome in the kidney leading to auto-entrainment of inflammation. The activation of inflammation has been demonstrated in the experimental model of crystalline nephropathy related to the uncontrolled oxalate urinary excretion. Inhibition of inflammasome activation has been related with the preservation of kidney function. In patients with kidney stone disease the presence of crystals in the urine has been demonstrated to induce tubular epithelial cells injury that can theoretically trigger the NET's or MET's release and tissue inflammation. NETs are now increasingly described as new targets for therapies, however largely under-estimated. The role of release of ETs from neutrophils and macrophages during the kidney stone disease has never been studied in urine but the neutrophil extracellular trap (NET) formation-NETosis - was found significantly increased in the papillae of patients with brushite stones compared with CaOx stones. The key objectives of this study are: 1. to assess NET/MET's excretion in the urine as a non-invasive method of NET/MET'osis measurement in patients with kidney diseases as a new biomarker of early stage of cells damages reflecting kidney injury occurring in patients with uncontrolled stones and other renal diseases; 2. to compare the NET/MET's concentrations in the urine with those in plasma
The purpose of this registry is to collect data on patients who have undergone minimally invasive treatments for urinary system stone disease, including percutaneous nephrolithotomy (PCNL), shock wave lithotripsy (SWL), semi-rigid ureterorenoscopy (URS), and flexible ureterorenoscopy (F-URS).
Large renal pelvic stones are frequently managed with percutaneous nephrolithotomy (PCNL) but laparoscopic pyelolithotomy (LPL) can be an alternative procedure when performed by skilled surgeons to achieve excellent outcomes in terms of stone free status, operative time, postoperative kidney function, hospitalization duration, and complications. there are two methods for LPL surgery : Transperitoneal (TLP) and Retroperitoneal (RLP). RLP associated with shorter mean time for oral intake, and mean hospital stay after surgery. The surgical exposure in the transperitoneal route for LP is familiar to the majority of surgeons. Also, a much larger working space is available and there are various established anatomical landmarks for performing the surgery effectively. This study introduces a modified technique that creates application of posterior pyelotomy in TLP to achieve the advantages of RLP
This research aims to study the effectiveness of silodosin in the management of lower ureter stones larger than 6 mm in diameter in terms of affected ureter (right or left), the size of the stone, the degree of hydronephrosis, the rate of stone expulsion(day), whether the stone was completely expelled or not, and the side effects of silodosin.
Nearly 10% of the Belgian population suffer from kidney stone disease. Recent reviews reported that kidney stones represent an underestimated risk factor for further kidney function deterioration. Preventive measures are recommended in lithiases patients to prevent the formation of new stones. The individual effects of different medicated prosthetic interventions have been documented in clinical trials. However, there is little data on the effectiveness of combining these different preventive measures in routine clinical practice (real-world context). Patients with kidney stone disease require a complete metabolic assessment. The three main factors contributing to the stone's formation are the patient's metabolism, diet and lifestyle. Metabolic work-up is recommended by the American Urology Association to identify and correct the factors responsible for urinary stone formation such as hypercalciuria, hyperoxaluria, hyperuricuria, hypocitraturia or abnormalities of urinary pH. The metabolic work-up includes at minimum the 24h urine test, a blood test and spot urine test. Dietary habits and lifestyle are assessed by means of a questionnaire. The CHU Brugmann Hospital has a specialized multidisciplinary clinic for renal lithiases and mineral metabolism. Preventive personalized and interdisciplinary care in CHU Brugmann consists of a full metabolic work-up allowing the identification of lithogenic risk factors by nephrologists, dietary assessment by specialized dieticians and specific treatment protocol associated with regular follow-up. The aim of this study is to evaluate, in the context of a retrospective single-center cohort study, the effect of preventive personalized and interdisciplinary care on the evolution of all urinary lithogenic risk factors and the recurrence of kidney stones (rate of renal colics, emergency room admissions, and urological interventions).
Rcompare high-energy versus low-energy laser settings in renal stone lithotripsy using low power machines) Holmium YAG 30 watts, examining their respective advantages, limitations, and overall efficacy.
The incidence of kidney stone disease continues to rise globally. Although the treatment of kidney stone disease has dramatically improved in recent years, surgical management remains invasive and expensive. Patients who develop kidney stones are at high risk of recurrence during their lifetime; therefore, prevention of stones should be a primary focus. Low levels of citrate and acidic urine are risk factors for the formation of kidney stones such as calcium oxalate and uric acid, respectively. Calcium oxalate stones are the predominant stone composition in the United States, accounting for over 2/3rds of stones. Citrate is a key inhibitor of calcium oxalate crystal formation and thus increasing it in the urine of a calcium oxalate stone former is quite beneficial. Uric acid stones account for approximately 10 percent of all stone types. These stones form primarily due to an acidic urinary environment which is a prerequisite for crystal formation. Common medications for stone formers include potassium citrate which help to make the urine more alkaline. Although effective, these medications have side effects and may prove to be too expensive (upwards of $450/month). Consuming baking soda (sodium bicarbonate) may prove to be an inexpensive ($0.34/month) equally effective alternative with respect to increasing urinary citrate levels and alkalinizing the urine. Investigators hypothesize that twice a day oral baking soda in a liquid medium (e.g., water, orange juice, soda, etc.) can be an effective, and inexpensive alternative to urocit K with regard to alkalinizing the urine and raising urinary citrate levels.
The goal of this clinical trial study is to test if patients with idiopathic calcium oxalate kidney stones have an increased absorption of dietary oxalate, which would lead to increased urinary excretion of oxalate. The study will recruit adult patients with a history of calcium oxalate kidney stones and healthy volunteers without kidney stones. Participants will - ingest fixed diets containing low and moderately high amounts of oxalate for 5 days at a time - ingest a soluble form of oxalate and sugar preparations to test gut permeability - collect urine, blood, stool and breath sample during the fixed diets and the soluble oxalate test
The purpose of the study is to assess procedural completion, the post-operative stone clearance and the safety profile following robotic mini-Percutaneous Nephrolithotomy (PCNL) performed with the MONARCH Platform, Urology.