Computational study for the effects of coil configuration on blood flow characteristics in coil-embolized cerebral aneurysm

Tomohiro Otani, Satoshi Ii, Tomoyoshi Shigematsu, Toshiyuki Fujinaka, Masayuki Hirata, Tomohiko Ozaki, Shigeo Wada

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Coil embolization of cerebral aneurysms with inhomogeneous coil distribution leads to an incomplete occlusion of the aneurysm. However, the effects of this factor on the blood flow characteristics are still not fully understood. This study investigates the effects of coil configuration on the blood flow characteristics in a coil-embolized aneurysm using computational fluid dynamics (CFD) simulation. The blood flow analysis in the aneurysm with coil embolization was performed using a coil deployment (CD) model, in which the coil configuration was constructed using a physics-based simulation of the CD. In the CFD results, total flow momentum and kinetic energy in the aneurysm gradually decayed with increasing coil packing density (PD), regardless of the coil configuration attributed to deployment conditions. However, the total shear rate in the aneurysm was relatively high and the strength of the local shear flow varied based on the differences in coil configuration, even at adequate PDs used in clinical practice (20–25 %). Because the sufficient shear rate reduction is a well-known factor in the blood clot formation occluding the aneurysm inside, the present study gives useful insight into the effects of coil configuration on the treatment efficiency of coil embolization.

Original languageEnglish
Pages (from-to)697-710
Number of pages14
JournalMedical and Biological Engineering and Computing
Volume55
Issue number5
DOIs
StatePublished - 1 May 2017
Externally publishedYes

Keywords

  • Cerebral aneurysm
  • Coil embolization
  • Computational fluid dynamics

Fingerprint

Dive into the research topics of 'Computational study for the effects of coil configuration on blood flow characteristics in coil-embolized cerebral aneurysm'. Together they form a unique fingerprint.

Cite this