Active clinical trials for "Nephrolithiasis"

This study is intended to be a prospective registry of patients undergoing any kind of stone treatment that have a pre-operative CT available. This imaging will be used to measure the stone burden in three different ways: in a single dimension (cumulative stone diameter), in two dimensions (surface area) and in three dimensions (volume).The primary purpose is to identify what way of measuring stone burden is most predictive of outcomes after stone treatment such as stone free status, operative time and complications.

The purpose of this study is to determine whether new software processing of ultrasound images can improve detection and size determination of kidney stones.

The primary aim is to study the natural history of single-calyx asymptomatic nonobstructing stone disease. The Secondary aim is to determine the predictors of the need for intervention and of cure in such population.

The purpose of this study is to measure the impact of Microbial Transplant Therapy (MTT) on 24-hour urine parameters in recurrent hypercalciuric and hyperoxaluric kidney stone formers.

Recent investigations from this group have identified that genetic variants of genes associated with monogenic forms of nephrolithiasis are expressed in idiopathic calcium oxalate kidney stone patients and could influence stone forming risk. Utilizing patient samples from the Mayo Clinic Florida Kidney Stone Registry, we will demonstrate that expression of these heterozygous mutations in idiopathic nephrolithiasis act as genetic modifiers of disease presentation increasing risk of kidney stone formation. Complimented by the analysis of environmental and lifestyle risk factors, these studies will define environmental and genetic susceptibility factors involved in kidney stone formation and reoccurrence.

To predict the outcome of flexible ureteroscopy in the management of renal stones based on preoperative scoring module using five preoperative parameters that have effect on stone free status postoperatively.

Metabolic acidosis recovers a wide range of diseases in which an oral alkalinization could be useful. This therapeutic intervention has been said to increase extracellular volume leading to rising blood pressure. No prospective data has been published in clinical routine. Here, investigators propose to follow patients in which an oral alkalinization is indicated: blood pressure, body weight, and a clinical evaluation of the extracellular compartment will be performed at the beginning and during the follow-up of participants. The principal criterion of evaluation will be the variation in the extracellular compartment.

to assess safety, efficacy of Flexible ureteroscopy (FURS) holmium:YAG laser lithotripsy (LL) compared to extracorporeal shockwave lithotripsy (ESWL) in management of lower calyceal stones (LC) stones.

This is a prospective randomized trial to study the effect of assigning the control of the fluoroscopic x-ray activation to the surgeon as compared to the radiation technologist. Radiation exposure will be assessed from the collected data, fluoroscopy time, and dose parameters (cumulative absorbed dose and dose area product). From exposure data, entrance skin dose (ESD) and midline absorbed dose (MLD) will be calculated. The primary outcome in this study will be total fluoroscopy time for the procedure. A secondary outcome will be the ESD. The investigators will further analyze the contribution of clinical predictors (e.g. stone size/location) and procedural predictors on fluoroscopy times and ESD. It is hypothesized that a 30% reduction in fluoroscopy time will occur when the operating surgeon is controlling the activation of the x-ray beam.

Ultraslow full-power SWL versus slow power-ramping SWL in stones with high attenuation value