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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 27:1861-1865, October 2006
© 2006 American Society of Neuroradiology

Technical Note
INTERVENTIONAL

Saccular Aneurysms on Straight and Curved Vessels Are Subject to Different Hemodynamics: Implications of Intravascular Stenting

H. Meng^a,b,c, Z. Wang^a,b,c, M. Kim^a,b,c, R.D. Ecker^a,b and L.N. Hopkins^a,b

^a Toshiba Stroke Research Center, University at Buffalo, State University of New York, Buffalo, NY
^b Department of Neurosurgery, University at Buffalo, State University of New York, Buffalo, NY
^c Department of Mechanical and Aerospace Engineering, University at Buffalo, State University of New York, Buffalo, NY

Please address correspondence to: Hui Meng, PhD, Toshiba Stroke Research Center, State University of New York at Buffalo, 447 Biomedical Research Bldg, Buffalo, NY 14214; e-mail: huimeng{at}buffalo.edu

SUMMARY: Our aim was to examine hemodynamic implications of intravascular stenting in the canine venous pouch (sidewall or straight-vessel) and rabbit elastase (curved-vessel) aneurysm models. Flow dynamics in stented (Wallstent) and nonstented versions were studied by using computational fluid dynamics simulations and in vitro flow visualization, with a focus on stent placement effects on aneurysmal flow stagnancy and flow impingement. Results show that sidewall and curved aneurysm models have fundamentally different hemodynamics (shear-driven versus inertia-driven) and thus stent placement outcomes.

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