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Wyszukujesz frazę "angioplasty." wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Finite element analysis of the percutaneous coronary intervention in a coronary bifurcation
Autorzy:
Bukała, J. K.
Małachowski, J.
Kwiatkowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/307501.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
angioplastyka
FEA
symulacja
angioplasty
balloon
kissing
simulation
Opis:
Purpose: The paper presents the process of numerical modeling and simulation of balloon angioplasty of the coronary artery using Finite Element Method. Methods: The authors focused on the issue of adequate pressure applying in an arterial tissue during the post-dilatation process in the 'kissing balloon' stenting technique applied to patients with bifurcation stenosis. Despite great progress in the field of interventional cardiology, angioplasty in bifurcations still belongs to the most difficult interventions, generally being less effective and more risky than in the cases of straight stenosis.Results: During the modeling procedures and further simulations, the authors focused on mutual cooperation of non - compliant angioplasty balloons and the coronary artery. The other goal was to develop a sufficiently accurate model of the coronary artery fragment, including its bifurcation and angioplasty balloons, however it was decided to ignore the modeling of coronary stents.Conclusions: The undertaken issue is considered as relatively complicated and complex but, in the authors opinion, the implementation of advanced computer aided engineering techniques may, in this case, answer several important questions without the need of performing costly and aggravating in vivo tests.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 4; 23-31
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical and experimental analysis of balloon angioplasty impact on flow hemodynamics improvement
Autorzy:
Tomaszewski, Michał
Sybilski, Kamil
Małachowski, Jerzy
Wolański, Wojciech
Buszman, Piotr P.
Powiązania:
https://bibliotekanauki.pl/articles/27324133.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
angioplasty
stent
artery
hemodynamics
cfd analysis
PIV method
angioplastyka
tętnica
hemodynamika
analiza CFD
metoda PIV
Opis:
Purpose: The paper focuses on the numerical and experimental evaluation of the fluid flow inside chosen fragments of blood vessels. In the first stage of the study, the experimental tests were conducted using a research test stand, designed to be used in this evaluation. The study evaluated the blood flow through a silicone vessel with an implanted coronary stent. Methods: The PIV method was used in order to visualize the flow vectors inside a silicone vessel. Deformed vessel geometry implemented for computational fluid dynamics purposes was obtained owing to a non-linear simulation of the stent expansion (angioplasty process) in a silicone vessel. Additionally, a vessel model with a statistical 55% area stenosis and an irregular real vessel with an atherosclerotic plaque were also subjected to analysis from the hemodynamic flow point of view. A vessel with a statistical stenosis was also used to simulate the angioplasty process, which resulted in obtaining a flow domain for the vessel with an atherosclerotic plaque after the stent implantation. Results: For each case, distributions of parameters such as OSI or TAWSS were also analyzed and discussed. The areas of low TAWSS values appear close to the stent struts. Conclusions: Stents with increased diameters, compared to the normal vessel diameter, create a higher risk of occurrence of the areas with low WSS values. Excessive stent deformation can cause inflammation by injuring the vessel and can initiate the restenosis and thrombotic phenomena through the increased vessel diameter.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 3; 169--183
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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