نتایج جستجو برای: profile stent system
تعداد نتایج: 2447894 فیلتر نتایج به سال:
background ureteral stents are widely used in many urologic practices. however, stents can cause significant complications including migration, fragmentation, and encrustation and it may possibly be forgotten. successful management of a retained, encrusted stent requires combined endourological approaches. objectives to present our experience with the approaches for treating forgotten ureteral ...
Neointimal hyperplasia, a process of smooth muscle cell re-growth, is the result of a natural wound healing response of the injured artery after stent deployment. Excessive neointimal hyperplasia following coronary artery stenting results in in-stent restenosis (ISR). Regardless of recent developments in the field of coronary stent design, ISR remains a significant complication of this interven...
The ideal stent must fulfil a broad range of technical requirements. Stents must be securely crimped onto the delivery balloon and, in this form, must have a low profile and be sufficiently flexible to facilitate deliverability to the lesion site without distortion or displacement. Following expansion, stents must exert sufficient radial force on the vessel wall to overcome lesion resistance an...
ترومبوز stent به عنوان یک عارضه آنژیوپلاستی عروق کرونر اغلب با حوادث کشنده ای مانند انفارکتوس قلبی و مرگ ناگهانی همراه است. تعاریف ترومبوز stent در مطالعات بالینی مختلف همسان نبوده است. در بیماری که معرفی می شود 2 حمله انفارکتوس قلبی همراه با بالا رفتن قطعه (stemi) st elevation myocardial infarction stتقریبا 2 سال بعد از گذاشتن یک stent دارویی (des) drug eluting stent رخ داده است و وجود ترومبوز...
Abstract Left subclavian artery occlusion is frequently treated by stent placement. The most commented on In-Stent Restenosis excessive thrombus that squeezes the and leads to vessel occlusion. In this paper, an automatic system provided segment left arteries aortic arches from chest MRI (Magnetic Resonance Imaging) images, then identify of based gray-levels extracted arch. Experimental results...
Monotherapy drug-eluting stents (DES) suppress neointimal proliferation and reduce the 1-year target lesion revascularization rate better than bare-metal stents but have other issues about safety and efficacy. Inadequate endothelial strut coverage causes stent thrombosis requiring stringent dual-antiplatelet therapy. Late catch-up with cumulative increase in the target lesion revascularization ...
مشکلات قلبی عروقی امروزه مشکلات زیادی را برای افرادی زیادی ایجاد کرده است. یکی از عواملی که باعث سکته قلبی می- شود گرفتگی رگ قلب می باشد که به وسیله ی ضایعاتی مانند چربی به وجود می آید. یکی از راه های مقابله با این مشکل استفاده ازاستنت ها قلبی می باشد.حال این استنت ها به دو صورتbare-metal stent وdrug-eluting stent عرضه می-شود.طریقه عملکرد این استنت ها به این صورت می باشد که وقتی در داخل رگ قرار...
Double-J (DJ) stent is placed temporarily in the ureter after urology surgery and is removed after 2-6 weeks. It is relatively rare for a patient to forget about the indwelling DJ ureteral stent. Major complications associated with such situation include DJ fracture, infection and encrustation. Increasing the thickness of the stent causes the adhesion of the urinary tract, therefore, the stent ...
BACKGROUND Foreshortening is a recognized problem that is present in angiography and results from views that are not perpendicular to coronary lesions. This limits visual coronary analysis as well as 2D quantitative coronary angiography systems (QCA). The CardiOp-B System is a 3D image acquisition and processing software system designed as an add-on to conventional X-ray angiography system. Car...
OBJECTIVE To assess stent implantation without previous dilation with a conventional balloon catheter to treat coronary artery obstructions, by using low profile guiding catheters and the transradial approach. METHODS The transradial approach is attractive due to the possibility of avoiding the trauma caused by the balloon, its shorter time of performance, reduced exposure to radiation, and t...
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