Computational fluid dynamics of blood flow in coil-embolized aneurysms: effect of packing density on flow stagnation in an idealized geometry View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2013-03-26

AUTHORS

Tomohiro Otani, Masanori Nakamura, Toshiyuki Fujinaka, Masayuki Hirata, Junko Kuroda, Katsuhiko Shibano, Shigeo Wada

ABSTRACT

Coil embolization is performed to induce flow stagnation in cerebral aneurysms and enhance blood clot formation, thus preventing rupture and further growth. We investigated hemodynamics in differently positioned aneurysms coiled at various packing densities to determine the effective packing density in terms of flow stagnation. As a first step, hemodynamic simulations were conducted for idealized geometries of both terminal- and sidewall-type aneurysms. Porous media modeling was employed to describe blood flow in coil-embolized aneurysms. The stagnant volume ratio (SVR) was analyzed to quantify the efficacy of coil embolization. Regardless of aneurysm type and angle, SVR increased with increasing packing density, but the increase in SVR varied depending on type. For sidewall-type aneurysms, the packing density required to achieve 60 % SVR was 20 %, roughly independent of aneurysm angle; flow stagnation was achieved at low packing density. In contrast, in terminal-type aneurysms, the packing density required to achieve 60 % SVR was highly dependent on aneurysm angle, accomplishing a 20 % packing density only for lower angles. Indications are that a relatively high packing density would be required, particularly when these aneurysms are angled against the parent artery. The packing density required for flow stagnation varies depending on aneurysm type and relative position. More... »

PAGES

901-910

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11517-013-1062-5

DOI

http://dx.doi.org/10.1007/s11517-013-1062-5

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1015349958

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/23529587


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