نتایج جستجو برای: nitinol
تعداد نتایج: 1341 فیلتر نتایج به سال:
BACKGROUND AND PURPOSE Modifications of aneurysm occlusion devices and other biologically active molecules may reduce the risk of recanalization by promoting vascular cell migration, adhesion, and proliferation. Our purpose was to apply in vitro methods in the qualitative and quantitative analysis of vascular smooth muscle cell (VSMC) interactions with collagen-impregnated microcoils. METHODS...
Objective Pancreatolithiasis is often treated by fragmentation of stones by extracorporeal shock wave lithotripsy, followed by additional endoscopic treatments, such as endoscopic pancreatic sphincterotomy. However, it is difficult to remove minute fragments or protein plugs using the conventional basket catheter. We recently used a newly developed nitinol basket catheter, for endoscopic remova...
Nickel titanium, also know as nitinol, is a prototypical shape memory alloy, property intimately linked to phase transition in the microstructure, which allows meso/macroscopic sample shape...
BACKGROUND Conventional guidewires are not suitable for use during cardiovascular magnetic resonance (CMR) catheterization. They employ metallic shafts for mechanical performance, but which are conductors subject to radiofrequency (RF) induced heating. To date, non-metallic CMR guidewire designs have provided inadequate mechanical support, trackability, and torquability. We propose a metallic g...
BACKGROUND Restenosis after percutaneous transluminal angioplasty (PTA) of the superficial femoral artery (SFA) may occur in 45% of patients at 2 years follow-up. Paclitaxel-coated balloons have been found to reduce neointimal hyperplasia, and thus reduce restenosis. Recently, the Legflow(®) paclitaxel-coated balloon (Cardionovum Sp.z.o.o., Warsaw, Poland) (LPEB) has been introduced. This ballo...
Objective: The purpose of this study was to compare the in vivo corrosion resistance of the implanted titanium, nitinol annular occlusion device to a control device, i.e. an implantable device containing nitinol, approved by the FDA and currently on the market. Methods: The annular occlusion device is a self-closing, implantable clip. Three canines underwent placement of devices on the left and...
OBJECTIVES The purpose of this study is to compare post-dilation strategies of nitinol self-expanding stents implanted in the superficial femoral artery of diabetic patients with peripheral arterial disease. BACKGROUND Endovascular treatment of superficial femoral artery disease with nitinol self-expanding stents is associated with high rates of in-stent restenosis in patients with diabetes m...
PURPOSE We developed a technique for laparoscopic ureterocalicostomy with the use of intracorporeal suturing and subsequently simplified the technique by application of experimental Nitinol clips. MATERIALS AND METHODS We performed laparoscopic ureterocalicostomy on 16 domestic swine divided into four groups of four animals each. The kidney was exposed laparoscopically, and the renal artery w...
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