Biomedical Engineering Reference
In-Depth Information
0.08
No coils
0.06
0.04
0.02
With coils
0.00
0.0
1.0
2.0
Time (sec)
3.0
4.0
FIGURE 6.6
The effect of the endovascular coil on the temporal variation of the average
velocity magnitude at the aperture of a narrow-necked aneurysm.
(a)
(b)
FIGURE 6.7
(a) Basilar aneurysm, (b) angiogram shows complete occlusion of the
aneurysm.
6.9 Future Work
One of the major computational challenges in cardiovascular fluid mechan-
ics is accurate modeling of the fluid-structure interactions (FSI) between the
blood flow and arterial walls. The flow vectors are determined by the arte-
rial geometry, and the deformation of the arterial wall depends significantly
on the accurate values of the mechanical properties of the aneurysm wall
(Young's modulus and Poisson's ratio) as well as on the pressure values. Exist-
ing publications on computational models of flow and wall mechanics in brain
aneurysms have either displayed the fluid field assuming rigid walls or have
 
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