Active clinical trials for "Constriction, Pathologic"

Prospective study to evaluate the safety and efficacy of using buccal mucosal graft for repairing complex cases of iatrogenic pelvi ureteric junction obstruction and long segment ureteric stricture disease.

This single-centre, single-arm, prospective study will enroll 30 subjects presenting with clinical and hemodynamic abnormalities in arteriovenous graft (AVG) in the arm. Subjects will be treated with the Jetstream™ atherectomy device and Ranger™ Drug Coated Balloons (DCB). Subjects will be followed up clinically via office visit or phone visit at 6 and 12 months post procedure. This study is to demonstrate safety and assess the clinical use and outcomes of the Jetstream ™atherectomy device and Ranger™ DCB for the treatment of dysfunctional AV graft.

A prospective study investigating the effectiveness and safety in lumbar stenosis patients receiving integrative Korean medicine treatment at 3 locations of Jaseng Hospital of Korean Medicine through assessment of pain, functional disability, and quality of life

Investigators aim to study the effectiveness and safety of inhaling hydrogen-oxygen which produced by a hydrogen generator with nebulizer to decreases inspiratory effort for the patients with tracheal stenosis.

The Stenting of Renal Artery Stenosis in Coronary Artery Disease (RASCAD) study is a randomized controlled trial designed to evaluate the effect of renal artery stenting+medical therapy versus medical therapy alone on left ventricular mass progression and cardiovascular morbidity and mortality in patients affected by coronary artery disease and renal artery stenosis.

Study aims: to compare two intervention strategies for bifurcation treatment - provisional T-stenting (PTS) with drug-eluting stent (sirolimus eluting), with kissing balloon inflation at the end of procedure - the best treatment strategy at the moment, with stenting of bifurcation lesions with dedicated bifurcation drug-eluting stent BiOSS Lym.

The aim of the present study was to compare the effect of unilateral versus bilateral stenting in patients with malignant hilar obstruction.

Renal artery stenosis (RAS) usually refers to a disease of the large extra-renal arterial vessels and most frequently is caused by atherosclerotic obstructions. The prevalence of atherosclerotic RAS increases with age, male gender, traditional cardiovascular risk factors (hypertension, diabetes, smoking, hyperlipidemia) and atherosclerotic comorbidities like coronary artery or peripheral artery disease (PAD). A prevalence up to 40% has been reported in patients with PAD. Undoubtedly, atherosclerotic RAS is a progressive disease, as more than half of the patients exhibit an increasing degree of stenosis within five years after diagnosis, and one out of five patients with a critical stenosis (>60%) suffers renal atrophy and renal failure during this period. RAS may be treated conservatively by so called best medical treatment, surgically, or by endovascular interventions using balloon angioplasty and stenting. The purpose of the investigators study is to determine the incidence and the predictors of RAS in patients with PAD, and to compare the effect of renal artery stenting versus best medical treatment in patients with hypertension and ostial renal artery stenosis in a randomized controlled trial.

The aim of this study is to evaluate the efficacy of local injected mitomycin C at the time of internal urethrotomy in order to prevent the recurrence of urethral strictures.

This study aims to evaluate mitomycin C as an adjunct to endoscopic treatment of esophageal strictures. This is a crossover, controlled, clinical trial in which children with esophageal stricture will be randomized in two groups to receive either topical mitomycin or no additional treatment during standard esophageal dilation session.