Biomedical Engineering Reference
In-Depth Information
Fig. 8.8
Maximum principal stress contours of the carotid bifurcation with different degrees of
stenosis (
a
) 10 % occlusion; (
b
) 25 % occlusion and (
c
) 50 % occlusion. The maximum principal
stress scale is in Pa
Fig. 8.9
Plots of the
maximum principal stress on
stenosis in diseased carotid
bifurcations. At peak flow
rate, the maximum princi-
pal stress decreases from
approximately to − 400 to
− 4000 Pa when the degree
of stenosis increases from 10
to 25 %
mum principal stress pattern seems highly symmetrical. However, as we increase
the degree of stenosis, the distribution starts to become non-symmetrical.
The maximum principal stress distribution is plotted in Fig.
8.9
. For the 25, 50 %
blockage cases, the maximum principal stresses at the proximal end of the stenosis
are greater than those at the distal end for the peak and minimum flow rates. The
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