Active clinical trials for "Nephrolithiasis"

Pain associated with renal stone disease is typically caused by an obstructing stone that obstructs the flow of urine, which results in renal collecting system dilatation. Non-obstructing renal calculi that do not cause renal collecting system dilatation are thought to be painless. The objective of this study is to prospectively determine if the removal of non-obstructing renal calculi can reduce or eliminate participant's pain and/or improve their quality of life.

Percutaneous nephrolithotomy (PCNL) is a first-line treatment for kidney stones >2cm. Frequently, patients require multiple procedures to address their stone burden. The decision to proceed with a second-look procedure is based on follow-up CT imaging, which is obtained postoperatively. In this study, we propose the use of a portable CT scan technology to obtain follow-up imaging while the patient is still under anesthesia for the initial procedure. The goal of this study is to determine whether this allows the surgeon to identify residual fragments and render the patient stone-free within a single anesthetic event.

The aim of this study is to identify the root cause for the significant discolouration of Boston Scientific Percuflex based stents.

Tamsulosin (Flowmax)is approved by the FDA for the treatment for enlarged prostate. Several studies regarding the use of Tamsulosin for the treatment of lower kidney stones have been carried out in the non-Emergency Department setting. This study will compare Tamsulosin 0.4 mg with placebo in regards to rate and time of stone passing and will also look at amount of pain. The purpose of this study is to compare the usefulness of Tamsulosin versus placebo on time to stone passage and pain relief in Emergency Department patients with kidney stones.

The purpose of this study is to determine whether continuous intravenous ketorolac infusion reduces pain in patients who are having percutaneous nephrolithotomy for kidney stone disease.

The patient will be asked to participate in a research project designed to determine the best way to prevent bleeding and promote patient comfort after having kidney stones removed. Two standard methods for ending the surgery are being compared to a newer method. In one standard method, the patient will have a tube draining urine from the kidney after the procedure. This tube may also prevent bleeding from the kidney. In another standard method the patient will have a tube left internally that drains urine from the kidney to the bladder and a stitch will be used to close the incision and deeper tissues in the back. In the third potential option, a tube would be left internally to drain urine from the kidney to the patient's bladder and the surgical site would be filled with a clot promoting agent (FloSeal) which is a FDA approved agent specifically formulated to stop bleeding during surgical procedures.

The response to opioids varies greatly among individuals. Some of these variability is accounted for by genetic factors. The present study was designed to evaluate the possibility that genetic polymorphism in the gene encoding for mu opioid receptor may explain variability in the response to alfentanil during lithotripsy.

This study will assess improvement in the percentage of spontaneous stone passage for distal ureteral calculi for alfuzosin compared to placebo, decrease of pain and narcotic/analgesic use associated with stone passage, decrease of the time to spontaneous stone passage, shift in the size distribution of stones passed towards larger sizes.

Extracorporeal shock wave lithotripsy (SWL) was first described for pediatric nephrolithiasis in 1986; SWL has been a mainstay of treatment for both renal and ureteral calculi in children . SWL is currently regarded as first-line therapy for most renal and upper ureteral calculi <2.0 cm according to the EAU/ESPU guidelines . Meanwhile, the American Urological Association (AUA) considers SWL to be a first-line option along with URS for renal or ureteral calculi <2.0 cm, and a first-line option along with PNL for renal calculi >2.0 cm . The shock waves are better transmitted and spontaneous clearance of fragmented stones in pediatric kidneys is higher than adults' kidneys; thus, SWL treatment seems likely to be more successful in the pediatric population compared to the adult population .Younger age is associated with better stone clearance in children treated with SWL, and this is related mostly to increased ureteral compliance (shorter, more elastic and distensible) and shorter skin-to-stone distance .

The objective of this research is to investigate the surgical outcomes of minimally invasive percutaneous nephrolithotomy(MPCNL) and retrograde intrarenal surgery (RIRS)for patients with renal stone larger than 1cm.