Computational model of coil placement in cerebral aneurysm with using realistic coil properties

Journal of Biomechanical Science and Engineering

Masayuki HIRATA¹  Tomoyoshi SHIGEMATSU¹  Satoshi II²  Toshiyuki FUJINAKA¹  Shigeo WADA²  Tomohiko OZAKI¹  Tomohiro OTANI² 

[1] Department of Neurosurgery, Graduate School of Medicine, Osaka University;Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University

关键词: Computational simulation;    Beam element;    Coil placement;    Cerebral aneurysm;   

DOI  :  10.1299/jbse.15-00555

来源: Japan Society of Mechanical Engineers

【 摘 要 】

References(30)This study presents a computational mechanical model of coil placement in cerebral aneurysms with using realistic coil properties. The mechanical behavior of the coil is expressed by solving a variational problem including the kinetic and elastic energies of the coil and geometric constraints due to the multiple contacts. The coil is discretized as a set of beam elements obeying Timoshenko beam theory, in which these elastic properties are determined based on the actual shape and material property of the coil. Numerical examples of the coil placement are presented for four cases with different coil properties in terms of the elastic property (hard and soft) and reference configurations (helical loop and complex loop) within the realistic range. These results exhibit the effects of the coil properties on not only the transition of the coil configuration during the placement process but also the contact force of the coil against the aneurysm wall which has a fatal risk of bleeding in the operation. The proposed computational model will assist surgeons to select the appropriate coil and coil deployment protocol to achieve the sufficient treatment effectiveness with minimizing the risk of bleeding in the view of the mechanical sense.

【 授权许可】

Unknown