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AuthorMuhammed Furkan, Tercanlı
AuthorOlcay, Ali Bahadır
AuthorMutlu, Onur
AuthorBilgin, Cem
AuthorHakyemez, Bahattin
Available date2021-10-21T09:57:16Z
Publication Date2021-12-31
Publication NameJournal of Clinical Neuroscience
Identifierhttp://dx.doi.org/10.1016/j.jocn.2021.10.007
CitationTercanlı, M. F., Olcay, A. B., Mutlu, O., Bilgin, C., & Hakyemez, B. (2021). Investigation of the effect of anticoagulant usage in the flow diverter stent treatment of the patient-specific cerebral aneurysm using the Lagrangian coherent structures. Journal of Clinical Neuroscience, 94, 86-93.
ISSN09675868
URIhttps://www.sciencedirect.com/science/article/pii/S0967586821005142
URIhttp://hdl.handle.net/10576/24632
AbstractAnticoagulants are prescribed to the flow diverter treated patients to diminish the risk of embolism in the arteries. In the present study, digital subtraction angiography images of a 49-year-old female patient with a left paraophthalmic aneurysm were used to build a numerical model to investigate the effect of an anticoagulant on hemodynamics at the aneurysm site. The Carreau-Yasuda viscosity model was utilized to define blood viscosity, and the coefficients of the viscosity model were updated based on the usage of warfarin. The five-cardiac cycle-long numerical simulations were performed, and Lagrangian coherent structures, hyperbolic time, and fluid particle analyses were also employed in the numerical models. These analyses allowed us to evaluate the formation of stagnated regions, recirculation zones, and the number of jailed particles inside the aneurysm sac following a flow diverter placement. It is realized that anticoagulant use caused blood to be less viscous, yielding a substantial amount of incoming blood flow to enter the aneurysm sac. Only 12% of the nearly 25,000 fluid particles seeded from the artery inlet have stayed inside the sac. Furthermore, the deviation between warfarin added blood and normal blood flow becomes more extensive, with every heartbeat undermining the effectiveness of patient-specific CFD models when the use of anticoagulants is overlooked in the viscosity models.
SponsorThis work has been supported by TUBITAK (The Scientific and Technological Research Council of Turkey) under 1001 Program, Project #: 117M491.
Languageen
PublisherElsevier
SubjectAnticoagulants
Warfarin
Flow diverter
Computational fluid dynamics
Lagrangian coherent structures
TitleInvestigation of the effect of anticoagulant usage in the flow diverter stent treatment of the patient-specific cerebral aneurysm using the Lagrangian coherent structures
TypeArticle
Pagination86-93
Volume Number94
dc.accessType Open Access


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