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Active clinical trials for "Nephrolithiasis"

Results 321-330 of 341

Study to Look for Artifact on Computed Tomography (CT) Representing Kidney Stones

Kidney Stones

Patients suspected of having a kidney stone are usually evaluated by computed tomography (CT) scan. The investigators hypothesize that ultrasound (U/S) should be sufficient to evaluate kidneys for suspected renal stones.

Completed2 enrollment criteria

Brushite Kidney Stones: A Registry and Database of Clinical and Laboratory Findings

Nephrolithiasis

Brushite kidney stones are a unique form of calcium phosphate stones that have a tendency to recur quickly if patients are not aggressively treated with stone prevention measures. Little research has been undertaken to better understand the clinical history and potential urinary abnormalities that may predispose one to these troublesome kidney stones.

Completed2 enrollment criteria

Staged Bilateral Percutaneous Nephrolithotomy

StoneKidney1 more

To determine the optimal time between the first and second operations in patients with bilateral kidney stones and scheduled percutaneous nephrolithotomy for the contralateral kidney. Patients who underwent percutaneous nephrolithotomy to the contralateral kidney 2-4 weeks and 4-6 weeks after the first operation will be compared.

Completed4 enrollment criteria

Influence of Polymorphisms in the ATP6V1 Gene of the V-ATPase on the Development of Incomplete Distal...

AcidosisRenal Tubular2 more

Purpose To compare the performance of the two currently employed urinary acidifications tests in stone formers, the furosemide/fludrocortisone and ammonium chloride loading test. To study the impact of polymorphisms in the genes ATP6V1B1, ATP6V0A4 and SLC4A1 on urinary acidification in stone formers.

Completed5 enrollment criteria

Health-related Quality of Life in Rare Kidney Stone

Primary HyperoxaluriaCystinuria2 more

Assessment of Health-related Quality of Life in Rare Kidney Stone Formers in the Rare Kidney Stone Consortium

Completed6 enrollment criteria

Ureteral Stenting After Ureteroscopy for Stone Treatment, A Global Perspective on Indications and...

Stone;RenalStone2 more

Background: The exit strategy after ureteroscopy for stone treatment remains a topic for discussion. Current EAU guidelines on urolithiasis state that postoperative stenting is indicated in patients at increased risk of postoperative complications. Stenting is not considered necessary in all other cases, and after uncomplicated procedures. Objective: To analyse the postoperative ureteral stenting strategy in clinical practice looking at the indication, type of stents used and the duration of stenting after ureteroscopy for stone treatment. Furthermore, the investigators will examine in what setting the stents are being removed postoperatively. Study design: This study is a prospective, observational, international, multicentre registry study executed by uCARE. Study population: All patients >18 years with a ureter or renal stone who are planned for ureteroscopic treatment by semi-rigid and/or flexible ureteroscopy are eligible for this study.

Completed3 enrollment criteria

Role of Flexible Cystoscopy in Laparoscopic Stone Surgery

Kidney Calculi; Ureteral Calculi

Authors want to investigate the usefulness of flexible cystoscopy in performing laparoscopic pyelolithotomies and ureterolithotomies by comparing operative results of a single surgeon's experience.

Completed3 enrollment criteria

Evaluation of the NV-VPAC1 Prostate Cancer (PCa) Urine Diagnostic Test in Subjects With Biopsy-confirmed...

Prostate CancerBenign Prostatic Hypertrophy2 more

This is a double-blind, study to evaluate the performance of NV-VPAC1 PCa Urine Diagnostic Test in three distinct populations being treated at the Intermountain Urology Clinic. The first population (positive control) is comprised of men with biopsy-confirmed PCa who are scheduled for prostatectomy. The second population (negative control) is comprised of men with benign prostatic hypertrophy (BPH) who are scheduled for transurethral resection of the prostate (TURP). The third population (negative control) is comprised of men or women with bladder/kidney stones who are scheduled for a cystoscopy.

Unknown status23 enrollment criteria

The Role Of FGF23, Klotho, And Sclerostin In Kidney Stone Formers

Kidney Stones

Kidney stones are very common in industrialized countries and the lifetime risk is about 10 to 15% in this population. Kidney stones are composed of inorganic and organic components. Calcium containing stones are the most common stone type accounting for more than 80% of kidney stones. Many factors predispose or contribute to the development of kidney stones, including genetic variants or mutations, diet, environmental factors, and behavior. To date, little is known on fibroblast growth factor (FGF23) levels in patients with calcium nephrolithiasis. FGF23 is crucial for phosphate homeostasis including physiological and pathophysiological conditions such as X-linked hypophosphatemic rickets and it seems that FGF23 is probably the most important regulator of serum phosphate and calcitriol (1,25(OH)2D3) levels in addition to parathyroid hormone (PTH) produced by the parathyroid gland. Novel factors such as Klotho and Sclerostin, which are involved in the bone-kidney-parathyroid endocrine axis, have been identified recently. Klotho is a putative aging suppressor gene and its deficiency results in osteopenia, hyperphosphaturia, and calcification. Klotho is mainly expressed in the kidney but also in the parathyroid gland and acts as a FGF23 specific co-receptor mediating FGF23 participation in the bone-kidney-parathyroid endocrine axis as described above. Sclerostin is a protein secreted by osteocytes that inhibits bone formation by osteoblasts. However, the potential role of FGF23, Klotho, and Sclerostin in nephrolithiasis is still poorly under-stood or even unexplored. The aim of this study is to test if levels of FGF23, Klotho, and Sclerostin are differentially regulated in kidney stone formers.

Unknown status1 enrollment criteria

Standard-PCNL vs Mini-PCNL vs Super-mini PCNL for the Treatment of ≥2 cm Renal Stone

StoneKidney2 more

Background: Standard-PCNL was considered as the first choice for ≥2 cm renal stones. Miniaturized technique Mini-PCNL has also been implicated in the past two decades. Recently, Super-mini PCNL (SMP) was introduced to treated ≤2.5cm renal stone. The miniaturized techniques seemed to take a longer operating time and have risk of getting infectious complications. However, there is no high quality of evidence showing that which kind of PCNL is best or what kind of patients is suitable for standard-PCNL, mini-PCNL or SMP. Objective: To compare the efficacy and safety of Standard-PCNL (≥24Fr), Mini-PCNL (12-20Fr) and SMP(10-14Fr) for the treatment of ≥2 cm renal stones Study design: This study is a prospective, observational, international, multicenter registry cohort study Study population: All patients ≥14 years with ≥2 cm renal stone who are planned for Standard-PCNL, Mini-PCNL or SMP are eligible for this study.

Unknown status3 enrollment criteria
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