Biomedical Engineering Reference
In-Depth Information
will present a study of stress analysis in saccular aneurysm model
with bleb. Figure 6.13 shows the luoroscopic image of an aneurysm
with bleb.
Bleb
Aneurysm
Figure 6.13
Fluoroscopic image of cerebral aneurysm with bleb.
6.5.1
Saccular Aneurysm with Bleb Model Design
As cerebral arteries are prone to the formation of saccular aneurysms,
anterior cerebral artery was used for reference. This artery has an
average inner diameter of 4 mm, as general guideline for aneurysms
with 5 mm diameter in this blood vessel present a rupture risk of 1%
within the irst year and surgery is not recommended at this stage
[11-12].
Height
Neck Width
Aspect Ratio =
5mm
Height
Dome
4.5mm
2.8mm
Neck
a)
b)
70mm
Figure 6.14
(a) Deinition of aspect ratio for aneurysms. (b) Designed
aneurysm.
Also when the aneurysm aspect ratio is above 1.6 the risk of
rupture is high, this rupture risk increases with this aspect ratio
[13-14]. Therefore, the aneurysm diameter was selected to be
Search WWH ::
Custom Search