View clinical trials related to Stents.
Filter by:To assess safety and effectiveness in the long term of percutaneous insertion of Biodegradable (BD) Biliary Stents for the treatment of benign biliary strictures, in a single center experience.
Spanish registry of resorbable stent implantation in biliary benign strictures. This registry is sponsored by the Spanish Society of Vascular and Interventional Radiology (SERVEI) and conducted by the Research Group GITMI (Group of Research in Minimally Invasive Techniques) of the University of Zaragoza (Spain). A software tool hosted on the official website of SERVEI and the journal Intervencionismo will be used for data collection a(https://estudios.watsoncme.com).
This study was designed to identify high platelet reactivity (HPR) who might have in-stent thrombosis in unruptured aneurysm with intracranial stent placement with light transmittance platelet aggregometry (LTA). For HPR patients, higher ischemic stroke rate maybe occurred, and we hypothesis that dose adjustment of aspirin and clopidogrel based on LTA monitoring maybe reduces the rate of ischemic stroke compared to a standard strategy after intracranial stent implantation at early periprocedural period and 1 month follow-up period.
Although expert consensuses recommend the use of statins in the treatment of atherosclerotic renal artery stenosis, in patients with severe atherosclerotic renal artery stenosis undergoing stent placement, the related investigation focused on renal protection by intensive lipid-lowering therapy is scant , and the optimal target level for lipid reduction remain uncertain. Therefore, we hypothesized that intensive lipid lowering could offer more benefits with respect to renal function in the patients with percutaneous renal artery stenting. We conducted the prospective randomized unblinded trial to compare the renal-protective effect of intensive lipid lowering with that of conventional lipid lowering in patients underwent renal artery stenting (75 patients in each study group)
The investigators will collect prospectively baseline, procedural and follow-up data of all patients receiving successful percutaneous coronary intervention (PCI) and stent implantation. Angio-based flow fractional reserve (quantitative flow ratio, QFR, Medis medical imaging systems Leiden, The Netherlands) will be estimated in all patients. Especially, the investigators at the end of the procedure (this is defined according operator's judgement) will record 2 orthogonal angiograms (as suggested by QFR instructions) at 15 frames/second and the same 2 orthogonal angiograms at 30 frames/second. An independent corelab (blinded to procedural data and clinical outcome) will estimate QFR value (one with the angiograms at 15 frames and one with those at 30 frames
The Evolution® Biliary Stent System Clinical Study is a clinical trial on a commercially available device to gather physician experience with the Cook Evolution® Biliary Stent System for the palliation of cancer in the biliary tree. Patients will be treated as per usual medical practices.
The CLARITY study is a clinical trial approved by US FDA to study the removal of the Evolution® Esophageal Stent-Fully Covered in malignant and benign indications.
The Investigators will test the hypothesis that MGuard net protective stent, the investigational device, would be superior to conventional revascularization strategy (i.e. bare-metal stenting plus manual thrombectomy), for STEMI patients undergoing urgent percutaneous coronary interventions.
Background: Safety concerns regarding use of drug eluting stent systems (DES) are related mostly to late stent thrombosis, which is facilitated by incomplete stent endothelial coverage. Specific information about time course and amount of endothelial strut coverage of different DES is required, in order to further refine the concept of antiplatelet therapy after DES implantation. Optical coherence tomography (OCT) is emerging as a new gold standard for endovascular imaging of stents, atherosclerosis progression, vulnerable plaque and neointimal proliferation. Very limited OCT data about endothelial coverage of DES are currently available. Aim of this study is a comparative evaluation of XIENCE V® everolimus eluting stent (Abbot Vascular) and of the bare metal stent (BMS) Coroflex® Blue postdilated with the drug-eluting balloon (DEB) SeQuent® Please (paclitaxel-eluting balloon, B. Braun Melsungen AG) in terms of endothelial coverage and neointimal proliferation using OCT. Study Design: A number of 80 patients scheduled for elective percutaneous coronary intervention (PCI) with a native coronary stenosis suitable for DES implantation and OCT imaging are openly randomized 1:1 to either XIENCE V® or Coroflex® Blue/Sequent® Please. The study is prospectively conducted at a university high-volume PCI center with OCT expertise (Jena, Germany). Angiographic follow-up and OCT imaging with motorized pull-back at 1 mm/s are planned in all patients 6 months after implantation of the study stents. OCT endpoints are: (1) endothelial coverage, expressed as % of struts without coverage and % of stent length containing non-covered struts, and respectively (2) neointimal proliferation, given as % neointimal volumetric proliferation within the whole stent and also as focal peak % neointimal area proliferation. The study is not powered for clinical endpoints, which are: subacute or late stent thrombosis and need for revascularization of the stent segment. Given the high number of measurements (15 cross-section images / 1 mm stent length), OCT endpoints are likely to reach significance at the level P < 0.05 even at a follow-up drop-out rate up to 20%.
The effectiveness, safety, and deliverability of second generation drug eluting stents (DES), including Xience V, will need to be examined in real world patients to provide the same level of evidence base and comfort that has accompanied the use of the first generation devices. Randomized clinical trials provide the fairest evaluation of outcomes by controlling for confounding patient and procedural characteristics; however, randomized clinical trials also exclude the very high risk patients that account for upwards of 80% of real world patient populations such as those at Wake Forest University Baptist Medical Center (WFUBMC). Clinical follow-up data including non-fatal MI, all cause mortality and stent thrombosis, as well as medications compliance, of patients undergoing stent therapy including Xience V in a real world patient population will be collected at WFUBMC. Existing data for several control groups will be used to compare outcomes with Xience V including a consecutively treated bare metal stent (BMS) cohort of 1,200 patients, and a DES cohort of 1,200 patients (900 sirolimus-eluting and 300 paclitaxel-eluting) treated between April 2004 and April 2005. Patients undergoing stent therapy in the year prior to use of Xience V, and contemporaneous patients receiving non-Xience V stent therapy during Xience V use will serve as additional controls. All patient data will be de-identified using unique blinded identification codes after data collection is completed. The null hypothesis of this study states that safety outcomes (stent thrombosis, non-fatal MI, death) with Xience V will be equivalent to historical and contemporaneous controls; effectiveness outcomes (target lesion and target vessel revascularization) with Xience V will be superior to historical and contemporaneous BMS controls, and equivalent to historical and contemporaneous DES controls; and the need for crossover to another stent type will be equal to that observed with historical DES controls. Outcomes will be reported using contemporary measures of clinical outcomes and analyzed using Cox proportional hazards survival analysis methodology. These data should provide important information on the clinical effectiveness and safety of Xience V in routine practice.