Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 178 for “"Stent"”.
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Finite element tool for modelling stent deployment to aid stent design
Includes bibliographical references (leaves 141-143).
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Dynamics of endovascular stent expansion
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Retrieving a Stent Navigating Deep Complications
… proximal right coronary artery. Angioplasty and stenting were performed without complications. A second stent was advanced to treat a distal lesion. During the advancement, stent dislodgement from the guidewire, with entrapment in the struts of the previously placed stent and migration to the …
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Bioactive surfaces for improved coronary stent performance
Drug eluting stents (DES) are widely used to treat coronary heart disease. Although current DES generally perform well, restenosis and delayed endothelium healing still remains an issue following stent implantations. Research efforts are now focused on the development of stent coatings that address …
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Computational analysis on stent geometries in carotid artery
Stent implantation is an altemative invasive technique for treating the narrowed artery or stenosis in carotid artery to restore blood to the brain. However, the restenosis process is usually observed after a few weeks of carotid stenting due to abnormal progression of atherosclerosis and …
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Experimentelle Untersuchungen am porzinen „over-sized coronary stent“-
… at the porcine over-sized coronary stent-model for in-stent-restenosis rate after implantation of uncoated niob-zirkonium stents and niob-zirkonium stents coated with iridiumoxide. Background: The treatment of atherosclerotic stenosis in coronary artery disease with balloon …
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Quantifying AAAs and developing FEA models for stent grafts
… (EVAR) is preferred, via the introduction of a stent graft into the aneurysmal region. In this thesis, finite element analysis (FEA) techniques have been developed to model the AnacondaTM stent graft. The aim is to produce the necessary numerical tools to allow for personalized EVAR simulations …
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Arterial Calcification and the Clinical Implications on Stent Function
… peripheral arterial disease (PAD), endovascular stenting can be a promising therapy that alleviates plaque obstruction and restores blood flow. However, stent fracture is a serious problem and it can lead to vascular complications, including restenosis. Stent fracture can be affected by type of …
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An investigation into stent expansion using numerical and experimental techniques
… in the mechanical loading induced in vessels stented with various different stent designs and the influence of this loading on restenosis outcome. This study investigates the experimental validation of these numerical stent expansions using compliant mock arteries. The development of this …
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Production of Polyhydroxyalkanoates and their application for coronary stent development
Development of coronary artery stents have revolutionised the treatment of coronary artery disease. However, the currently available stents have several limitations and side effects, which still need to be addressed. Within this group of biomaterials Polyhydroxyalkanoates (PHAs), which are …
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Long-term patency of nitinol stent placement in dysfunctional hemodialysis
Purpose: To evaluate the long-term patency of stents placement on dysfunctional hemodialysis shunt after failed balloon angioplasty and analysis the factors affecting the patency of nitinol stent. Materials and methods: Eighty-three patients with dysfunctional dialysis shunts underwent bail-out …
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Stent Reliability and Maintenance: Integrating Probabilistic and Physics-of-Failure Models
… study of such new devices. More than one million stents are implanted in human arteries each year. These devices are subject to a wide range of stress due to biological and procedural factors. Fatigue and structural damage can occur to stents that may lead to tumor formation, allergies or even …
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Innovation in medical devices : a case study of the coronary stent
… a case study of introduction of the coronary stent into the percutaneous transluminal coronary angioplasty (PTCA) industry. The industry evolution is analyzed within the industrial life cycle framework developed by Utterback, Tushman and others. The coronary stent was first introduced in 1994, …
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Μηχανισμοί του μη θανατηφόρου οξέος εμφράγματος του μυοκαρδίου όψιμα μετά από εμφύτευση stent : ο ρόλος της επαναστένωσης, της θρόμβωσης του stent και της προόδου της στεφανιαίας νόσου
… ή της θρόμβωσης της στεφανιαίας ενδοπροθέσεως (stent), καθώς και της προόδου της στεφανιαίας νόσου σε άλλο σημείο του αγγειακού δικτύου, ως υπεύθυνων μηχανισμών του οξέος εμφράγματος του μυοκαρδίου (ΟΕΜ) μετά την τοποθέτηση stent, δεν είναι αποσαφηνισμένη Μέθοδοι: Μετά από ανασκόπηση της βάσης …
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Aplicación de la tomografía de coherencia óptica en la trombosis del stent
… de la enfermedad coronaria con el implante de stents farmacoactivos de última generación es un procedimiento seguro y eficaz. La complicación más grave de este procedimiento es la trombosis del stent (TS), que, si bien tiene una baja incidencia con los stent utilizados en la actualidad, …
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Promoting endothelialisation to reduce vascular injury following coronary angioplasty and stent implantation
… outcomes in patients undergoing angioplasty and stenting for coronary artery disease. I sought to establish a new cellular model to study the coronary endothelium in patients with acute myocardial infarction, and to utilise this model to identify novel polymer substrates that promote …
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Finite Element Analysis of a Novel Design for a Non-Migrating Biliary Stent
Biliary stenting is most frequently caused by an interruption in the ability to drain bile into the duodenum. This obstructive jaundice is commonly a result of a stricture from a tumor located at the pancreas’s head, peri-ampulary area, bile duct, or gall bladder. Jaundice can also occur from …
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Clinical Aspects on Chimney Stent Graft Technique in Endovascular Repair of the Aorta.
… proximal and distal sealing zone for the aortic stent graft. Fenestrated and branched stent grafts have made the repair possible for complex but elective cases that do not have an adequate sealing zone. Urgent complex cases and patients with midaortic occlusive diseases do not have any …
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