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master's thesis
Ispitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:643621
Šegon, Ana Marija
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Šegon, A. M. (2023). Ispitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:643621

Šegon, Ana Marija. "Ispitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:643621

Šegon, Ana Marija. "Ispitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:643621

Šegon, A. M. (2023). 'Ispitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 30 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:643621

Šegon AM. Ispitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 November 30] Available at: https://urn.nsk.hr/urn:nbn:hr:235:643621

A. M. Šegon, "Ispitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:643621

Metadata
TitleIspitivanje upotrebljivosti stentova promjenjivih promjera izrađenih od polimera s memorijom oblika
Title (english)Feasibility analysis of shape memory polymer stents with variable diameter
AuthorAna Marija Šegon
MentorLana Virag (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-07-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Abstract
Ateroskleroza je jedna od najčešćih kardiovaskularnih bolesti, a tijekom njezinog razvoja dolazi do zadebljanja i oštećenja stijenke krvnih žila stvaranjem različitih aterosklerotskih promjena, najčešće plaka. Liječenje se može provesti kirurškim ili endovaskularnim pristupom. Endovaskularni pristup često uključuje ugradnju stenta. Stentovi se, prema načinu ugradnje, dijele na one koje se šire balonom (npr. metalni stentovi) i samoekspandirajuće (izrađeni od legura ili polimera s memorijom oblika). Samoekspandirajući stentovi uzrokuju manje oštećenja stijenke prilikom ugradnje, ali je s druge strane poznato da polimerni stentovi imaju lošija mehanička svojstva od metalnih. Međutim, razvoj novih i unapređenje postojećih materijala i tehnologija izrade omogućuje izradu složenijih geometrija stentova, pa tako i prilagođavanje oblika stenta svakom pacijentu posebno. Primjerice, da bi se osigurala dovoljna radijalna čvrstoća polimernog stenta, moguće je izraditi stent koji ima promjenjiv promjer, umjesto često korištene ravne mrežaste cjevčice. U sklopu ovog diplomskog rada definirana je pojednostavljena geometrija karotide s aterosklerotskim plakom kako bi se procijenila upotrebljivost stentova izrađenih od polimera s memorijom oblika i promjenjivim promjerom stenta. Razvijen je numerički postupak ugradnje stenta u karotidnu arteriju, koristeći hiperelastične modele za opisivanje materijala stijenke i stenta. Analizirana je upotrebljivost stentova s promjenjivim promjerom koristeći naprezanja u stentu kao kriterij, te je ocijenjena učinkovitost predloženih stentova s obzirom na smanjenje stenoze nakon ugradnje.
Abstract (english)
Atherosclerosis is one of the most common cardiovascular diseases, characterized by thickening and damage to the blood vessel walls due to the formation of various atherosclerotic changes, most commonly plaques. Treatment can be performed through surgical or endovascular approaches. The endovascular approach often involves the implantation of a stent. Stents are divided based on the method of implantation, into those that expand with a balloon (e.g., metal stents) and self-expanding stents (made of shape memory alloys or polymers). Self-expanding stents cause less damage to the vessel wall during implantation, but it is known that polymer stents have inferior mechanical properties compared to metal stents. However, the development of new and improved materials and manufacturing technologies allows for the production of more complex stent geometries, including customized stent shapes for individual patients. For example, to ensure sufficient radial strength of a polymer stent, it is possible to create a stent with a variable diameter instead of the commonly used straight mesh tube. In this thesis, a simplified geometry of the carotid artery with an atherosclerotic plaque was defined to assess the usability of shape memory polymer stents with a variable diameter. A numerical procedure for stent implantation in the carotid artery was developed using hyperelastic models to describe the material behavior of the vessel wall and stent. The usability of stents with a variable diameter was analyzed using stress in the stent as a criterion, and the effectiveness of the proposed stents in reducing stenosis after implantation was evaluated.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:643621
Study programmeTitle: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering, Mechatronics and Robotics, Autonomous Systems
Course: Engineering Modelling and Computer Simulation
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-07-13 12:37:04