Active clinical trials for "Peripheral Arterial Disease"

The objective of this study is to evaluate the performance of the Zilver PTX stent thumbwheel delivery system.

Comparison of recurrent-restenosis rates 6 months after angioplasty of in-stent restenoses or in-stent reocclusions in the superficial femoral artery (SFA) using either a standard balloon (Admiral Xtreme, Invatec) or a paclitaxel-eluting balloon (In.Pact™ Admiral, Invatec).

Aimed to compare the success in the peripheral intravenous puncture (PIP), progression and placement of PICC in children, according to the use of Doppler vascular ultrasound (DVUS) or traditional method; to identify the influence of the DUVS in the time expended to PICC placement. Methods: Clinical, randomized and controlled trial conducted after ethical merits of research endorsement and the obtaining of consent for those responsible for the children. The sample, calculated in 42 PICC to obtain a power of 0,85, was distributed randomly into two groups, experimental group (EG) and controlled group (CG). To the statistical analyzes Pearson Chi-square, Fisher's Exact Tests, Generalization of Fischer's Exact and Mann-Whitney tests was applied (5%). Of the 42 catheters, 21 (50.0%) were implemented in EG and 21 (50.0%) in CG. The PIP was obtained in the first attempt in 90.5% of the punctures of the EG and in 47.6% of the GC, (p=0.003). PICC were implanted successfully in 18 (85.7%) children of GE and 11 (61.1%) of CG (p = 0.019). The median of the time spent to the procedure was significantly higher (p=0.001) in CG (50 minutes) when compared to EG (median 20 minutes).

This randomized, post-market clinical study is intended to evaluate the delivery and deployment of longer Zilver PTX stents (≥ 100 mm) compared to shorter Zilver PTX stents (≤80 mm) for treatment of lesions of the above-the-knee femoropopliteal artery.

The proposed project is a prospective observational, single-center cohort study aimed to examine the progression of atherosclerotic alterations of the carotid arteries (IMT, plaque volume) during a follow-up of up to four years and to correlate the observed changes with traditional and novel biomarkers of atherosclerosis. A total of 600 subsequent patients with or established cardiovascular disease or at least one cardiovascular risk will be tested with a high-frequency ultrasound probe equipped with automated IMT measurements and 3D quantitative plaque volumetry. Plasma samples will be collected and tested for traditional and novel cardiovascular risk factors. Both ultrasound examinations and blood sampling will be repeated once per year to assess changes in these parameters over time depending on treatment modalities, which are left to the discretion of the treating physicians. The primary endpoint of the planned study will be the correlation between P-selectin and the progression of atherosclerosis as measured by plaque volume and IMT in the carotid and femoral arteries, respectively. Secondary endpoints will include the correlation of established (hypertension, smoking, diabetes, dyslipidemia) and novel risk factors (hsCRP, P-selectin, cholesteryl ester transfer protein (CETP), intercellular adhesion molecule-1 (ICAM-1), CETP TaqIb polymorphism) with the progression of atherosclerosis, the correlation of cardiovascular events with the progression of atherosclerosis and the additional predictive value of plaque volume and IMT compared to an established risk score (SCORE card).

CLARITY I is a pilot study to identify the clinically appropriate endpoint(s) of a larger, statistically powered pivotal trial for treatment of patients with Critical Limb Ischemia (CLI).

IVUS imaging will be utilized to assess performance of the Sponsor's Orbital Atherectomy System (OAS) followed by adjunctive balloon angioplasty (BA) in patients who have symptomatic peripheral artery disease (PAD) occurring in the Superficial Femoral Artery (SFA), Popliteal (POP), and/or Tibioperoneal Trunk (TPT).

Despite recent advances in stent technology and its widespread application in the treatment of peripheral vascular disease (PVD), incidences of partial or complete blockage of stent lumen (in-stent restenosis) due to in growth of cells (neo-intimal proliferation) is unacceptably high. In diabetics with long superficial femoral artery (SFA) lesions, in-stent restenosis rates are higher than in non-diabetics. Consequently interventional techniques that curtail in-stent restenosis have to be explored. Cryoplasty is a stent expansion method in which a balloon is expanded using pressurized nitrous oxide gas. As the nitrous oxide expands in the balloon it cools the surroundings to about -10 degrees C. This induces programed death (apoptosis) of the smooth muscle cells in arterial wall. The investigators hypothesize that Cryoplasty, by inducing an apoptotic smooth muscle cell response, when applied to post-dilation of nitinol self-expanding stents in the Superficial Femoral Artery (SFA) of diabetics, would lead to decreased in-stent restenosis due to decreased neointimal proliferation.

This is a multi-center, non-randomized, single arm study of the SilverHawk™ /TurboHawk™ plaque excision systems when used in conjunction with SpiderFX™ embolic protection device in treatment of moderate to severely calcified peripheral arterial disease in the superficial femoral and/or popliteal arteries.

The purpose of this study is to investigate the performance of the ABSOLUTE™ .035 peripheral self-expanding stent system in preventing restenosis of occluded or stenotic superficial femoral or proximal popliteal arteries.