Search Results
Results 351 - 400 of 2907
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Vergnat Mathieu - - 2009
OBJECTIVE: Balloon-expandable stent valves require flow reduction during implantation (rapid pacing). The present study was designed to compare a self-expanding stent valve with annular fixation versus a balloon-expandable stent valve. METHODS: Implantation of a new self-expanding stent valve with annular fixation (Symetis, Lausanne, Switzerland) was assessed versus balloon-expandable stent valve, ...
Wakhloo Ajay K - - 2009
In 2008 we witnessed a rapid advancement in stent technology, which is reflected in the high number of case reports, publications of case series, and randomized trials. Stents not only served for a combined intrasaccular and extrasaccular treatment of challenging aneurysms but also assisted the revascularization in acute and chronic ...
Shah Qaisar A - - 2009
Symptomatic occlusive lesions at the origins of the supra-aortic vessels pose challenges for treatment. Endovascular angioplasty and stent placement via the transfemoral approach is possible, but obtaining a stable position for the guide catheter via this approach is technically difficult. The authors describe the case of a 56-year-old man presenting ...
Lee Sun Hwa - - 2009
We describe here a 63-year-old woman, who consecutively developed a stent-related coronary aneurysm of left circumflex artery, which was associated with spontaneous healing, and sequential late stent malapposition of left anterior descending artery following the implantation of two different kinds of drug-eluting stents, respectively. She did not experience any cardiac ...
Liatsikos Evangelos - - 2009
For three decades, intraureteral tubular devices have been used to maintain ureteral patency. The contribution of stents to modern urology is invaluable, since these devices are closely associated with everyday urologic practice. Polymeric stents represent the most commonly used type of stent, while metal stents are indicated in selected cases. ...
Ramcharitar Steve - - 2009
BACKGROUND: A 63-year-old man presented with class II anginal symptoms. INVESTIGATIONS: Cardiac catheterization, intravascular ultrasound (IVUS) virtual histology, optical coherence tomography and off-line palpography. DIAGNOSIS: The patient was diagnosed as having a culprit lesion in the left circumflex artery and a vulnerable plaque in the left anterior descending artery. MANAGEMENT: ...
Shomura Y - - 2009
BACKGROUND: Although metallic stents are characterized by strong expanse of force, thin walls, and easy stent deployment, their removal from the body is usually difficult or impossible due to the difficulty of unraveling their mesh structure. A stent built of a composite material comprising a metallic wire and a polylactic ...
Xu Gelin - - 2009
Evolvement of endovascular devices and increase of operator expertise have made angioplasty and stenting in intracranial vessels technically possible. Stenting has been reported in treating stenosis in middle and anterior cerebral arteries with favorable outcomes. However, the feasibility of stenting for stenosis in posterior cerebral artery (PCA) has not been ...
Bussière Miguel - - 2009
OBJECT: Hemodynamic instability may complicate carotid angioplasty and stenting in up to 40% of patients. The authors have previously demonstrated that primary self-expanding stent placement alone can gradually dilate severely stenosed carotid arteries without the use of balloons. The authors hypothesized that eliminating the balloon would reduce carotid baroreceptor stimulation, ...
Veselka Josef - - 2009
OBJECTIVES: To report on early outcomes of prospective single-center registry, which evaluated feasibility, safety, and effectiveness of direct carotid stenting using FilterWire EZ Embolic Protection System in high-risk patients. BACKGROUND: Little is known about the use of direct carotid stenting with FilterWire EZ Embolic Protection System and different carotid stents. ...
Choo Ki Seok - - 2009
Our retrospective study aimed to determine whether 16-slice computerized tomography (CT) angiography optimized sharp kernel is suitable for the evaluation of visibility, luminal patency and re-stenosis of intracranial stents in comparison with conventional angiography. Fifteen patients with symptomatic intracranial stenotic lesions underwent balloon expandable stent deployment of these lesions (10 ...
Rangwala Hussain S - - 2009
Partially polyurethane-covered stent (PPCS) is proposed for the treatment of cerebral aneurysms. The PPCSs were observed to substantially modify the flow entering the aneurysm in a patient-specific aneurysm phantom (PSAP). These stents can act as flow modulators and the polyurethane (PU) membrane can provide a smooth scaffold for restoring the ...
Yevzlin Alexander - - 2009
Vascular access stenosis in patients undergoing chronic hemodialysis is a major issue that is associated with increased morbidity, mortality, and cost of medical care. Recent data have emphasized that endovascular stents could be used in the treatment of central as well as peripheral stenotic lesions. In general, a peripheral or ...
Oki Masahide - - 2010
The silicone stent has been widely used to re-establish airway patency for patients with airway stenosis. The ideal shape of the stent should be well adapted to the tracheobronchial anatomic structures, and its optimal length should cover the entire inner wall of the stenotic airway. Although the silicone Y-stent was ...
Watkinson A F - - 2009
Subintimal wire dissection is a well-established method for traversing difficult vascular occlusions. This technique relies on re-entry of the true lumen distal to the occlusion, which may be difficult in diseased vessels with significant calcification. This case report describes a novel "cheese wire" technique to allow stent positioning without the ...
Suzuki Shigeru - - 2009
We wanted to evaluate the performance of prospective electrocardiogram (ECG)-gated axial scans for assessing coronary stents as compared with retrospective ECG-gated helical scans. As for a vascular model of the coronary artery, a tube of approximately 2.5-mm inner diameter was adopted and as for stents, three (Bx-Velocity, Express2, and Micro ...
Sun Zhonghua - - 2009
Fenestrated endovascular repair of an abdominal aortic aneurysm has been developed to treat patients with a short or complicated aneurysm neck. Fenestration involves creating an opening in the graft fabric to accommodate the orifice of the vessel that is targeted for preservation. Fixation of the fenestration to the renal arteries ...
Li Xiao-Ming - - 2010
PURPOSE: To assess the accuracy of 64-slice multi-detector row computed tomography (MDCT) angiography in the evaluation of peripheral artery in-stent or peristent restenosis, with conventional digital subtraction angiography (DSA) as the reference standard. MATERIALS AND METHODS: Forty-one patients (30 men, 11 women; mean age, 69.8+/-9.2 years) with symptomatic peripheral arterial ...
Wakhloo Ajay K - - 2009
In 2008 we witnessed a rapid advancement in stent technology, which is reflected in the high number of case reports, publications of case series, and randomized trials. Stents not only served for a combined intrasaccular and extrasaccular treatment of challenging aneurysms but also assisted the revascularization in acute and chronic ...
Kretschmar Oliver - - 2009
OBJECTIVES: Relief of pulmonary artery stenosis before and after cavopulmonary connections (CPC) in patients with single ventricle malformation is essential to optimize pulmonary hemodynamics. We evaluated the risk factors for pulmonary artery stenosis and assessed the outcome after stent implantation. INTERVENTIONS: Seventeen stents in twelve patients were implanted for pulmonary ...
Wang C - - 2009
BACKGROUND AND PURPOSE: Endovascular detachable balloon occlusion and coil occlusion are 2 well-established options for the treatment of direct carotid cavernous fistulas (DCCFs). In recent years, covered stents have been applied in the treatment of neurovascular pathologies such as aneurysms, pseudoaneurysms, arterial dissections, and DCCFs. The purpose of this study ...
Tsunoda Taro - - 2009
OBJECTIVES: To investigate stent deformation by torsional stress after implantation at the ostium of a model coronary artery. BACKGROUND: Little is known about coronary stent deformation, especially the association between stent design and deformation at the coronary ostium. Recent reports have suggested that mechanical factors are important for stent restenosis. ...
Kawasaki Tomohiro - - 2009
BACKGROUND: Various two-stent techniques have been applied to aggressively treat bifurcation lesions as the introduction of drug-eluting stents (DES) and the importance of the bifurcation angle and three-dimensional (3D) structure has come to be recognized. Recent 64 multislice computed tomography (MSCT) technology provides accurate information about the 3D bifurcation geometry ...
Kurimoto Yoshihiko - - 2009
BACKGROUND: Endovascular stent-grafting with intentional coverage of the left subclavian artery may be used to treat aortic isthmus injury, but this procedure may have serious neurologic sequelae and may not provide an adequate proximal landing zone. In 2005, in an effort to mitigate these problems, we began to use fenestrated ...
Siewiorek Gail M - - 2009
Carotid artery stenting has gained popularity due to its minimally invasive approach. However, several design concerns preclude the successful use of carotid stents. Technical issues, such as open versus closed cells, scaffolding, trackability, foreshortening, and changes in local geometry and hemodynamics, affect stent performance. Previous clinical and experimental studies have ...
Gualis Javier - - 2009
We report the case of a severe prosthetic aortic stenosis in a 61-year-old male patient with an aortic Mitroflow LF bioprosthesis (Sorin Group) at early (6 months) postoperative echocardiographic follow-up. At reintervention, we found significant stent deformation, asymmetric orientation of the posts, and subsequent central kinking and prolapse of one ...
Zhong Hongshan - - 2009
PURPOSE: To present a new endovascular technique for placing handmade partially covered stent-grafts in rabbit aortas that is promising for experimental study of direct gene delivery to the aortic wall. METHODS: A 7-mm-diameter Z-stent made from the inner core of a guidewire was covered with a 7-mm-diameter, 10-mm-long polyester fabric ...
Murasato Yoshinobu - - 2009
BACKGROUND: Fluoroscopy and intravascular ultrasound (IVUS) lack sufficient resolution for assessing the results of complex stenting in true bifurcation lesions. OBJECTIVES: After diverse bifurcation stenting at the left main coronary artery (LM) bifurcation model, the results were examined using microfocus computed tomography (MFCT). METHODS: The strut distribution of three kinds ...
Chisci E - - 2009
Peripheral artery rupture as a late complication of an endovascular stenting, due to the protrusion of a stent, has never been described in the literature in thigh arteries. Here we describe two anecdotic cases of artery rupture after superficial femoral artery (SFA) stenting. In both cases the endovascular procedure was ...
Haji-Zeinali Ali-Mohammad - - 2009
PURPOSE: To prospectively assess the efficacy of self-expanding nitinol aortic stents in the treatment of coarctation of the aorta (CoA). METHODS: Between July 2005 and July 2008, 21 patients (14 men; mean age 19.2+/-5.5 years, range 11-34) with CoA were treated with self-expanding Sinus-Aorta stents. The predilation balloon was selected ...
Mewissen Mark W - - 2009
The 1- to 2-year primary patency rates associated with self-expanding nitinol stents for the treatment of symptomatic femoropopliteal disease are superior to those for percutaneous transluminal angioplasty (PTA) and the first-generation stainless steel balloon-expandable stents. The advantages of nitinol stents include improved radial strength and flexibility, the ability to recover ...
Szabolcs Zoltan - - 2009
A 57-year-old man complaining of chest pain presented with signs of lower limb ischemia 1 year after implantation of a stent graft at the aortoiliac bifurcation. A computed tomography scan revealed the presence of a type A aortic dissection and complete collapse of the stent graft by bulging of the ...
Idelchik Gary M - - 2009
PURPOSE: To determine the safety and efficacy of percutaneous treatment for popliteal artery aneurysms (PAA) using self-expanding stent-grafts. METHODS: From October 2000 through September 2007, 29 patients (27 men; mean age 68+/-6 years, range 54-88) underwent endovascular exclusion of 33 PAAs. All had symptoms of claudication, and all were atherosclerotic ...
Puri A S - - 2009
Summary: We describe a case of unusual Enterprise stent navigation through the Circle of Willis in a patient with a basilar tip aneurysm, left internal carotid artery (ICA) occlusion and previous right ICA stenting. Basilar tip aneurysms are known for their therapeutic challenges, especially when the posterior cerebral arteries (PCAs) ...
Jongen Lisa M - - 2009
PURPOSE: To examine the prevalence of in-stent lesions 1 month after carotid artery stent placement with multidetector computed tomography (CT) angiography and to evaluate their possible causes and their consequences during 1-year follow-up. MATERIALS AND METHODS: Sixty-nine patients with symptomatic carotid artery stenosis underwent multidetector CT angiography of the carotid ...
Andreini Daniele - - 2009
Noninvasive assessment of coronary in-stent restenosis (ISR) is clinically useful but 4- and 16-slice multidetector computed tomography is limited due to stent strut artifacts. We evaluated the feasibility and accuracy of 64-slice multidetector computed tomography in the diagnosis of ISR to validate its accuracy in ISR quantification and identify factors ...
Zhu Yue-Qi - - 2009
PURPOSE: To assess the efficacy and biocompatibility of balloon-expandable stainless-steel stents covered with various membrane types. MATERIALS AND METHODS: Stents covered with biomembrane (ie, piglet greater omentum vein), polyurethane, or expanded polytetrafluoroethylene (ePTFE; n = 12 each) were implanted into the 36 bilateral carotid arteries of 18 dogs to treat ...
Chlapoutaki Chrysanthi Emmanouil - - 2009
We report an 8-month-old girl with portal hypertension secondary to biliary atresia. The decision to treat with TIPS was made at the age of 8 months due to recurrent variceal bleeding. The procedure was carried out with a 6-mm bare stent due to her small size. Radiological follow-up with Doppler ...
Brekenfeld C - - 2009
BACKGROUND AND PURPOSE: The major goal of acute ischemic stroke treatment is fast and sufficient recanalization. Percutaneous transluminal balloon angioplasty (PTA) and/or placement of a stent might achieve both by compressing the thrombus at the occlusion site. This study assesses the feasibility, recanalization rate, and complications of the 2 techniques ...
Macdonald Sumaira - - 2009
To develop a scoring system to facilitate case selection for carotid artery stenting based on anatomic features. Twelve experts comprising a multinational and multispecialty panel were convened. Delphi consensus methodology was applied over 4 "rounds" involving emailed questionnaires, private decision-making, structured interaction and explicit aggregation. In round 1 panelists proposed ...
Nahab F - - 2009
There are limited data on the relationship between patient and site characteristics and clinical outcomes after intracranial stenting. We performed a multivariable analysis that correlated patient and site characteristics with the occurrence of the primary endpoint (any stroke or death within 30 days of stenting or stroke in the territory ...
Zong Gang-Jun - - 2009
OBJECTIVE: The goal of this study was to evaluate valvular functionality after transcatheter pulmonary valve replacement in sheep using a novel pulmonary valve stent. METHODS: Fresh porcine pericardium cross-linked with 0.6% glutaraldehyde was treated with L-glutamine to eliminate glutaraldehyde toxicity and sutured onto a valve ring before mounting on a ...
Sun Zhonghua - - 2009
The purpose of the study was to investigate the hemodynamic effect of stent struts (wires) on renal arteries in patients with abdominal aortic aneurysms (AAAs) treated with suprarenal stent-grafts. Two sample patients with AAA undergoing multislice CT angiography pre- and postsuprarenal fixation of stent-grafts were selected for inclusion in the ...
Wei G - - 2009
BACKGROUND: Endovascular repair by stent graft has been developed as a safe and less-invasive treatment for descending thoracic and abdominal aortic diseases. In case of involvement of the aortic arch, the challenge in endovascular repair is to maintain blood flow to the brain and upper extremities. Several studies have been ...
Blasel Stella - - 2009
The detection of clinically silent ischemic lesions on postprocedural diffusion-weighted magnetic resonance images has become a preferred method for the description of embolic risks. The purpose of this single-center study was to evaluate whether diffusion-weighted imaging (DWI) could determine material related or technical risk factors of filter-protected carotid stenting. Eighty-four ...
Ozkan Ugur - - 2009
The aim of this study was to report our experience in endovascular treatment of total aortoiliac occlusion. Five patients who underwent endovascular recanalization procedures including manual aspiration thrombectomy, balloon angioplasty, and stent placement for total aortoiliac occlusion in a 4-year period were reviewed retrospectively. The mean age of patients was ...
Siddiqui Mohammed Aslam - - 2009
INTRODUCTION: The purpose of the study is to describe our experience in eight cases of horizontal stenting across the circle of Willis in patients with terminal aneurysms. METHODS: Eight patients were treated with horizontal stent placement and aneurysm coiling. All aneurysms had highly unfavourable dome to neck ratios. All patients ...
Hiramoto Jade S - - 2009
None of the commercially available stent grafts are supplied in a tapered configuration suitable for the endovascular repair of common iliac artery aneurysms. We describe a simple technique for reversing the proximal and distal orientation of a standard flared bell-bottom stent graft limb from the Zenith system of abdominal aortic ...
Pierce Damon S - - 2009
The differential effect of open-cell vs closed-cell stent design configuration on carotid velocities detected by duplex ultrasound (DUS) imaging has not been established. To identify possible stent design differences in carotid velocities, we analyzed DUS studies obtained before and immediately after carotid artery stenting (CAS). In a series of 141 ...
Xie J - - 2009
BACKGROUND AND PURPOSE: The carotid siphon is a natural barrier to intracranial interventions. Our aim was to make a model of the human intracranial internal carotid artery (ICA) and to test the navigability of covered stents for intracranial applications. MATERIALS AND METHODS: A digital tube was made on the basis ...
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