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胸主动脉病变
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The Influence of Different Types of St..
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A computational fluid dynamic study of s..
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Circumferential and longitudinal cyclic ..
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On stent-graft models in thoracic aortic..
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Effects of flat, parabolic and realistic..
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(作者:J.W. van Keulen, K.L. Vincken, J. van Prehn, J.L. Tolenaar, L.W. Bartels, M.A. Viergever, F.L. M 刊发时间:2009-10)(查看:3011 下载:11)
概述:Objective: Dynamic imaging provides insight into aortic shape changes throughout the cardiac cycle. These changes may be important for proximal aortic stent graft fixation, sealing and durability. The objective of this study is to analyse the influence of different types of stent grafts on dynamic changes of the aneurysm neck. Methods: Pre- and postoperative electrocardiography (ECG)-gated computed tomographic angiography (CTA) scans were obtained in 30 abdominal aortic aneur
(作者:Tina M. Morrison 刊发时间:2009-04)(查看:2650 下载:6)
概述:Objective: We developed a novel method using anatomic markers along the thoracic aorta to accurately quantify longitudinal and circumferential cyclic strain in nondiseased thoracic aortas during the cardiac cycle and to compute age-related changes of the human thoracic aorta. Methods: Changes in thoracic aorta cyclic strains were quantified using cardiac-gated computed tomography image data of 14 patients (aged 35 to 80 years) with no visible aortic pathology (aneurysms or dissection). We me
(作者:Liam Morris[|] 刊发时间:2006-01)(查看:2490 下载:6)
概述:Computational fluid dynamics modelling of bifurcated stent grafts positioned across Abdominal Aortic Aneursysms (AAAs) is influenced significantly by the boundary conditions and geometry. To assess these influencing factors, simulations using three different steady inlet profiles and two geometries were run. The steady velocity inlet profiles (flat, parabolic and realistic) were used as input boundary conditions with a constant pressure outlet for each model. The geometry of an out-of-plane r
(作者:Steven W.F.Cheng 刊发时间:2008-05)(查看:2273 下载:11)
概述:Significant stent graft remodeling commonly occurs after endovascular repair of thoracic aortic dissections because of continuing expansion of the true lumen.A suboptimal proximal landing zone, minimal oversizing, and lack of a healthy distal attachment site are unique factors affecting long-term stent graft stability. We used computational fluid dynamic techniques to analyze the biomechanical factors associated with stent graft remodeling in these patients.
(作者:George S.K. Funga,∗,[|] 刊发时间:2008-01)(查看:2210 下载:13)
概述:In treating thoracic aortic diseases, endovascular repair involves the placement of a self-expanding stent-graft system across the diseased thoracic aorta. Computational fluid dynamic techniques are applied to model the blood flow by numerically solving the three-dimensional continuity equation and the time-dependent Navier–Stokes equations for an incompressible fluid. From our results, high blood pressure level and high systolic slope of the pressure waveform will significantly increase the
 
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