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Nephrolithiasis clinical trials at UC Health
4 in progress, 2 open to eligible people

  • Endourology Disease Group Excellence (EDGE) Consortium: Antibiotics (Abx) for Percutaneous Nephrolithotomy (PCNL) Part 2

    open to all eligible people

    This study will be a multi-institutional randomized clinical trial of a short course of pre-operative antibiotic prophylaxis in addition to perioperative antibiotics prior to undergoing percutaneous nephrolithotomy. The select patient population will be those patients deemed to be at a moderately increased risk of postoperative infectious complications. These higher risk patients are those with indwelling urinary drainage tubes and those with a positive preoperative urine culture.

    at UCSD

  • Ultrasound First Clinical Decision Support for Suspected Nephrolithiasis

    open to eligible people ages 18-75

    This is a randomized trial to determine the effectiveness of a clinical decision support tool on image ordering for patients with suspected nephrolithiasis. Patients who present with acute unilateral flank or abdominal pain in whom emergency department providers suspect nephrolithiasis will receive either the clinical decision support tool or no tool (usual care).

    at UCSF

  • Contrast-enhanced Ultrasound Versus CT Scan for Kidney Stone Patient Management

    Sorry, not yet accepting patients

    This study will be a randomized controlled study comparing the use of two clinical management strategies in nephrostomy tube management following percutaneous nephrolithotomy (PCNL). The first strategy entails using contrast-enhanced ultrasound (CEUS) to evaluate the renal collecting system (1). This is a new imaging approach applying ultrasound machines with special software in combination with intraluminal ultrasound contrast agent (Lumason) injection, which is an FDA-approved ultrasound contrast agent (2). The second strategy is a nephrostomy tube capping trial combined with low dose non-contrast computed tomography (CT) scan, one of the most frequently utilized clinical management strategies currently used in clinical practice (3).

    at UCSF

  • Trial of Tadalafil, Tamsulosin and Combination for Access Sheath Deployment

    Sorry, accepting new patients by invitation only

    Extensive literature exists on the use of alpha-blocker medications for the removal of kidney stones. Alpha blockers relax certain muscles and help small blood vessels remain open. They work by keeping the hormone norepinephrine (noradrenaline) from tightening the muscles in the walls of smaller arteries and veins, which causes the vessels to remain open and relaxed. This improves blood flow and lowers blood pressure. There are studies that demonstrate alpha-blockers decrease ureteral pressure and help the ureter "relax." Recent studies have shown that phosphodiesterase inhibitors may also help with ureteral stone passing. A phosphodiesterase inhibitor is a drug that blocks an enzyme that inhibits relaxation of smooth muscle. This means that it can help smooth muscle, such as the muscle that lines the ureter, to relax. While ureteral relaxation is helpful in the passage of ureteral stones, our study seeks to use this finding by pretreating participants with an older generation alpha blocker or a phosphodiesterase inhibitor prior to passage of a ureteral access sheath in cases in which ureteroscopy is being used to approach a ureteral or renal stone. By relaxing the ureter, it is possible that a larger access sheath can be safely placed. This may allow for facilitating passage of the ureteroscope and extraction of stone fragments while precluding the development of potentially damaging intrarenal pressure from the flow of irrigant. The ureteral access sheath also protects the ureter from damage during the procedure. Placement of the largest access sheath possible is helpful in that larger stone fragments can be retrieved, the flow of irrigant is improved, and the surgical field is kept clear of blood or debris. To date, nobody has studied whether use of an uro-selective alpha blocker, alone, or in combination with a 5 phosphodiesterase inhibitor will result in passage of larger access sheaths. In this study participants will be randomized into 1 of 4 categories: Flomax (alpha-blocker), Cialis (5-phosphodiesterase inhibitor), a combination of the 2, or a placebo arm. In this study the placebo, or no active drug, is the current standard of care and will serve as a control from the other 3 groups.

    at UC Irvine

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