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Acta Neurochirurgica
Published in: Acta Neurochirurgica 2/2011

01-02-2011 | Experimental research

Influence of parent vessel dominancy on fluid dynamics of anterior communicating artery aneurysms

Authors: Tamer Hassan, Amr Ali Hassan, Yaser Mohamed Ahmed

Published in: Acta Neurochirurgica | Issue 2/2011

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Abstract

Background

Parent vessel plays an important role in aneurysm formation and rupture. The diameter of either the A1 arteries is the peculiar key controlling the flow of the anterior communicating artery (ACOMA) aneurysms (ANs).

Objective

The purpose is to study the effect of parent vessel dominancy, that is, the diameter of the A1 artery, on the flow characteristics of the ACOMA ANs.

Methods

Numerical simulations for the flow patterns in six artificial models have been studied. Three models are designed with aneurysms and three models without. The two A1s were equal in two models. In the other two models, the nondominant A1 diameters were decreased by 50%. Again, the nondominant A1s were decreased by another 50% in the last two models. Each pair was designed with and without aneurysms in the ACOMA.

Findings

The ACOMA shows lower velocity magnitudes and wall shear stresses when the two A1s are equal. However, if one A1 is dominant with a 50% difference from the other A1, there is higher shear stress on the ACOMA itself and in the inflow zone of the aneurysm that increases more with further reduction of the nondominant A1 by another 50%. An area of high corner pressure at the bifurcation of the dominant A1 into the ACOMA and A2 exists and increases in value with the decrease of diameter of the other nondominant A1.

Conclusion

Aneurysms located in the ACOMA with differences of 50% or more between the two A1s are subjected to more flow stresses.
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Metadata
Title
Influence of parent vessel dominancy on fluid dynamics of anterior communicating artery aneurysms
Authors
Tamer Hassan
Amr Ali Hassan
Yaser Mohamed Ahmed
Publication date
01-02-2011
Publisher
Springer Vienna
Published in
Acta Neurochirurgica / Issue 2/2011
Print ISSN: 0001-6268
Electronic ISSN: 0942-0940
DOI
https://doi.org/10.1007/s00701-010-0824-1

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