Active clinical trials for "Constriction, Pathologic"

The investigators propose a randomized non-blinded comparison of dorsal vs. ventral approach for buccal mucosa graft urethroplasty in the bulbar urethra. Buccal mucosa graft is a common method of repairing the strictured urethra. Current evidence suggests the two approaches for placement of the graft are equally successful at correcting the stricture and the two approaches have similar risks of complications. The investigators propose to randomly assign appropriately selected patients to either a dorsally- or ventrally-placed graft. No additional procedures beyond normal care protocol will be required of the patients. Success will be assessed via objective and subjective methods; complications will be tallied in a standardized fashion. Outcomes will be measured at two years.

To demonstrate the safety and effectiveness of the Perceval S heart valve when used to replace a diseased or dysfunctional aortic valve or aortic valve prosthesis.

This study is designed to compare the safety and efficacy of paclitaxel-eluting balloon (DEB) versus conventional percutaneous transluminal angioplasty (PTA) for the treatment of hemodynamically significant recurrent cephalic arch stenosis in brachial cephalic fistulas in hemodialysis patients.

This is a randomized, prospective, double-blind, placebo-controlled clinical trial of the use of mitomycin-C topical application as an adjunctive treatment in the endoscopic surgical treatment of patients with laryngotracheal stenosis. We hypothesize that the use of mitomycin-C improves patient outcome in the endoscopic surgical treatment of laryngotracheal stenosis.

The purpose of this clinical trial is to evaluate the safety and effectiveness of the DIAM Spinal Stabilization System as a method of treating patients with symptoms of degenerative lumbar spinal stenosis at a single level from L2 to L5.

The purpose of this study is to evaluate the safety and effectiveness of the In-Space compared to the X STOP Interspinous Process Distraction (IPD) device ("X STOP") for the treatment of patients experiencing intermittent neurogenic claudication secondary to moderate degenerative lumbar stenosis at one or two lumbar levels.

The purpose of this study is to demonstrate the efficacy of a PTFE covered stent-graft in the prevention of outflow re-stenosis in loop fistula in a prospective trial.

Plastic biliary stents which are a new larger size will remain free of obstructions for a longer period of time than currently used 10 French stents in cancer in the common bile duct.

To compare the effect of lumbar spinal manipulation, physical therapy and surgical management in the treatment of lumbar spinal stenosis.

The NORDSTEN- OS(Observational study) aim to study the natural course in patients with mild to moderate symptomatic lumbar spinal stenosis with and without degenerative spondylolisthesis. 10 years follow-up is planned. The NORDSTEN-OS is one of three studies in The NORwegian Degenerative Spondylolisthesis and Spinal STENosis studies. The two other studies are: NORDSTEN-SST (Spinal stenosis trial) (NCT02007083); a randomized controlled trial comparing the clinical and radiological results in three different decompression techniques in patients with lumbar spinal stenosis. The NORDSTEN-DS (Degenerative spondylolisthesis) (NCT02051374); a randomized controlled trial comparing the outcome of surgery with decompression without fixation and decompression with fixation in patients with lumbar spinal stenosis and concurrent degenerative spondylolisthesis.