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Flow Visualization Studies of Bifurcation Aneurysm
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- UJIIE Hiroshi
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University
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- YOSHIMOTO Shigeka
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University
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- HORI Tomokatsu
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University
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- INAGAKI Susumu
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University
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- ISHIBASHI Yukio
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University
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- TAKEDA Shuichiro
- Department of Neurosurgery, Neurological Institute, Tokyo Women's Medical University
Bibliographic Information
- Other Title
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- 分岐部動脈瘤の流れの可視化
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Description
We conducted flow visualization studies and measurements of intraaneurysmal flow volume using a flat three-dimensional acrylic aneurysm model. Flow visualization was done by the tracer particle technique and the particle streamlines were pursued through a charge-coupled device (CCD) camera. Analysis of intraaneurysmal flow volume was carried out by means of dye injection. Monitoring of time-related concentration of the aneurysms allowed calculation of the mean transit time (MTT) using the height-over area method. Fundamental intraaneurysmal flow was composed of inflow, circulation flow, and outflow. These fundamental flow patterns were strongly influenced by the flow ratio into the distal branches. A nearly symmetric flow ratio failed to achieve full intraaneurysmal flow. The critical flow ratio to raise inflow into an aneurysm was considered to be 3:1, and the best flow ratio to develop intraaneurysmal flow in our three-dimensional model was 4:1. An increase of the aneurysmal size and changes in geometrical features such as the daughter formation, the dumbbell shape narrowing and narrowing of the neck led to a stagnant area or very sluggish flow area at the dome side. Geometries favoring aneurysmal rupture are considered to be closely associated with low-flow condition.
Journal
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- Surgery for Cerebral Stroke
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Surgery for Cerebral Stroke 27 (6), 439-445, 1999
The Japanese Society on Surgery for Cerebral Stroke
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Details 詳細情報について
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- CRID
- 1390001205464721024
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- NII Article ID
- 130004668674
- 10005593955
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- NII Book ID
- AN10061756
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- ISSN
- 09145508
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
