Coil embolization is one of the most popular methods to treat cerebral aneurysms. We investigated hemodynamics in differently positioned aneurysms coiled at various volume embolization ratios (VER) to determine the effective VER in terms of flow stagnation. Simulations were conducted for patient specific aneurysm and idealized aneurysm. Porous media modeling was used to describe blood flow within the coil-embolized aneurysm. The ratio of flow stagnation volume to aneurysm volume (stagnant volume ratio, SVR) was analyzed to quantify the efficacy of coil embolization. The results showed that SVR tended to increase with increasing VER for both patient-specific and idealized aneurysms. For the idealized model, SVR was almost 100% at 20% of VER. In contrast, SVR in the patient specific aneurysm was approximately 40% for VER of 20%. These results suggested the importance of taking account of geometrical features of aneurysms when treating them by coil embolization.
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ASME 2012 International Mechanical Engineering Congress and Exposition
November 9–15, 2012
Houston, Texas, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4518-9
PROCEEDINGS PAPER
Effects of the Extent of Coil Embolization on Flow Stagnation in Cerebral Aneurysms
Tomohiro Otani,
Tomohiro Otani
Osaka University, Toyonaka, Osaka, Japan
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Masanori Nakamura,
Masanori Nakamura
Saitama University, Saitama, Saitama, Japan
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Toshiyuki Fujinaka,
Toshiyuki Fujinaka
Osaka University, Suita, Osaka, Japan
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Masayuki Hirata,
Masayuki Hirata
Osaka University, Suita, Osaka, Japan
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Junko Kuroda,
Junko Kuroda
Osaka University, Suita, Osaka, Japan
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Katsuhiko Shibano,
Katsuhiko Shibano
Osaka University, Suita, Osaka, Japan
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Shigeo Wada
Shigeo Wada
Osaka University, Toyonaka, Osaka, Japan
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Tomohiro Otani
Osaka University, Toyonaka, Osaka, Japan
Masanori Nakamura
Saitama University, Saitama, Saitama, Japan
Toshiyuki Fujinaka
Osaka University, Suita, Osaka, Japan
Masayuki Hirata
Osaka University, Suita, Osaka, Japan
Junko Kuroda
Osaka University, Suita, Osaka, Japan
Katsuhiko Shibano
Osaka University, Suita, Osaka, Japan
Shigeo Wada
Osaka University, Toyonaka, Osaka, Japan
Paper No:
IMECE2012-89174, pp. 175-176; 2 pages
Published Online:
October 8, 2013
Citation
Otani, T, Nakamura, M, Fujinaka, T, Hirata, M, Kuroda, J, Shibano, K, & Wada, S. "Effects of the Extent of Coil Embolization on Flow Stagnation in Cerebral Aneurysms." Proceedings of the ASME 2012 International Mechanical Engineering Congress and Exposition. Volume 2: Biomedical and Biotechnology. Houston, Texas, USA. November 9–15, 2012. pp. 175-176. ASME. https://doi.org/10.1115/IMECE2012-89174
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