Droplet Formation Simulation for Cerebral Aneurysm Embolization

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  • NATSUME Takuya
    Graduate School of Engineering, Tokyo City University
  • OISHI Masamichi
    Institute of Industrial Science, The University of Tokyo
  • MUKAI Nobuhiko
    Graduate School of Engineering, Tokyo City University
  • OSHIMA Marie
    Institute of Industrial Science, The University of Tokyo Initiative in Information Industries, The University of Tokyo

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Other Title
  • 脳動脈瘤塞栓術を目的とした液滴形成シミュレーション
  • ノウ ドウミャクリュウ ソクセンジュツ オ モクテキ ト シタ エキテキ ケイセイ シミュレーション

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Abstract

Although liquid embolization is performed in overseas as a preventive surgical procedure for subarachnoid hemorrhage caused by rupture of a cerebral aneurysm, it is unauthorized in Japan for the sake of safety. Then, the authors developed droplet formation simulation using particle method for its safety verification. The embolic material used in liquid embolization is highly viscous compared to water, so that reducing the simulation time step is necessary according to von Neumann condition. Otherwise, it takes a lot of time to analyze. Therefore, in this study, the viscous term is implicitly solved and the simulation time is reduced. Finally a simulation has been performed, where an embolic material is injected into a water tank that mimics a cerebral aneurysm through a circular tube that imitates a catheter. In addition, we have confirmed that a droplet has been formed, which was similar to the experimental result.

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