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. 1999 Oct;20(9):1703-5.

Analysis of slipstream flow in two ruptured intracranial cerebral aneurysms

S G Imbesi  1 , C W Kerber
Affiliations

Analysis of slipstream flow in two ruptured intracranial cerebral aneurysms

S G Imbesi et al. AJNR Am J Neuroradiol. 1999 Oct.

Abstract

Replicas of ruptured posterior communicating and basilar artery aneurysms were created from cadaveric specimens and then were placed in a circuit of pulsating non-Newtonian fluid. Individual fluid slipstreams were opacified with isobaric dyes, and images were recorded on film. The slipstreams entered the distal aneurysm neck with impact against the distal lateral wall of the aneurysm. They then swirled slowly in a reverse vortical pattern within the aneurysm sac. Fluid exited the aneurysm at the proximal neck. The flow pattern clearly shows the impact zone of entering slipstreams (the point of aneurysm rupture) and provides information pertaining to aneurysm growth and formation.

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Figures

<sc>fig</sc> 1.
fig 1.
Posterior communicating artery aneurysm. A, Opacified fluid slipstreams enter the aneurysm sac via the distal neck (arrowhead) and impact upon the distal lateral aneurysm wall (arrow). B, Disturbed, nonturbulent reverse vortical flow is seen within the aneurysm. C, Flow exits the aneurysm peripheral to the central incoming jet, usually at the proximal portion of the neck.
<sc>fig</sc> 2.
fig 2.
Basilar artery aneurysm. A, Similarly, slipstreams enter via the distal aneurysm neck (arrowhead) and impact against the distal lateral aneurysm wall (arrow), the site of aneurysm rupture. B, Reverse vortical flow is seen within the aneurysm sac. C, Flow exits the proximal neck peripheral to the distal central incoming jet.
See this image and copyright information in PMC

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