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TECHNICAL BRIEFS

Finite-Element Modeling of the Hemodynamics of Stented Aneurysms

[+] Author and Article Information
Gordan R. Stuhne, David A. Steinman

Imaging Research Labs, Robarts Research Institute, 100 Perth Dr., P.O. Box 5015, London, Ontario, Canada N6A 5K8 Department of Medical Biophysics, University of Western Ontario, Medical Sciences Building, London, Canada N6A 5C1, Phone: (519) 663-5777 ext. 34113, Fax: (519) 663-3078

J Biomech Eng 126(3), 382-387 (Jun 24, 2004) (6 pages) doi:10.1115/1.1762900 History: Received July 29, 2003; Revised October 10, 2003; Online June 24, 2004
Copyright © 2004 by ASME
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References

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Aenis,  M., Stancampiano,  A. P., Wakhloo,  A. K., and Lieber,  B. B., 1997, “Modeling of flow in a straight stented and nonstented side wall aneurysm model,” J. Biomech. Eng., 119, pp. 206–212.
Lieber,  B. B., Stancampiano,  A. P., and Wakhloo,  A. K., 1997, “Alteration of hemodynamics in aneurysm models by stenting: influence of stent porosity,” Ann. Biomed. Eng., 25, pp. 460–469.
Imbesi,  S. G., and Kerber,  C. W., 2001, “Analysis of slipstream flow in a wide-necked basilar artery aneurysm: evaluation of potential treatment regimens,” AJNR Am. J. Neuroradiol., 22, pp. 721–724.
Lieber,  B. B., and Gounis,  M. J., 2002, “The physics of endoluminal stenting in the treatment of cerebrovascular aneurysms,” Neurol. Res., 24, Suppl 1, pp. S33–42.
LaDisa,  J. F., Guler,  I., Olson,  L. E., Hettrick,  D. A., Kersten,  J. R., and Warltier,  D. C., and Pagel,  P. S., 2003, “Three-dimensional computational fluid dynamics modeling of alterations in coronary wall shear stress produced by stent implantation,” Ann. Biomed. Eng., 31, pp. 972–980.
Groden,  C., Laudan,  J., Gatchell,  S., and Zeumer,  H., 2001, “Three-dimensional pulsatile flow simulation before and after endovascular coil embolization of a terminal cerebral aneurysm,” J. Cereb. Blood Flow Metab., 21, pp. 1464–71.
C. R. Ethier, D. A. Steinman, and M. Ojha, “Comparisons between computational hemodynamics, photochromic dye flow visualization and magnetic resonance velocimetry,” in The haemodynamics of arterial organs—comparison of computational predictions with in vivo and in vitro data, M. W. Collins, Ed. Southampton: WIT Press, 1999, pp. 131–183.
Ethier,  C. R., Prakash,  S., Steinman,  D. A., Leask,  R. L., Couch,  G. G., and Ojha,  M., 2000, “Steady flow separation patterns in a 45° junction,” J. Fluid Mech., 411, pp. 1–38.
Maday,  Y., Patera,  A. T., and Ronquist,  E. M., 1990, “An operator-integration-factor splitting method for time-dependent problems: Application to incompressible fluid flow,” J. Sci. Comput. 5, pp. 263–292.
Prakash,  S., and Ethier,  C. R., 2001, “Requirements for mesh resolution in 3D computational hemodynamics,” ASME J. Biomech. Eng., 123, pp. 134–144.
Stuhne, G., and Steinman, D. A., “Mesh resolution requirements for the numerical simulation of flow through stented aneurysms,” Proc. ASME Bioengineering Conference, Key Biscayne FL, 2003.
Ma,  D., Lin,  F., and Chua,  C. K., 2001, “Rapid prototyping applications in medicine. Part 1: NURBS-based volume modeling,” Int. J. Adv. Manuf. Technol., 18, pp. 103–117.

Figures

Grahic Jump Location
NURBS surface rendering indicating the isoparametric lines and patch structure of the stented aneurysm model. Front and side views illustrate the symmetry of the model and indicate the key model dimensions.
Grahic Jump Location
Physiological time variation of Re (computed on the basis of vessel diameter and RMS inflow velocity) over one cardiac cycle.
Grahic Jump Location
Surface triangulation from the most finely resolved stented mesh (with Δ=425 μm,2δ/d=0.35). Faces of quadratic elements are subdivided into linear triangles, and close-ups of two representative details are shown.
Grahic Jump Location
Surface distributions of WSS from the steady stented simulations with 2δ/d=1.00 (top), 2δ/d=0.60 (middle), and 2δ/d=0.35 (bottom). WSS is shown as a fraction of the asymptotic value for a straight cylindrical artery.
Grahic Jump Location
Sample streamlines in stented pulsatile flow near peak systole (top) and peak diastole (bottom). Streamlines are traced forward and backward from seed points along the diagonals of the overlaid regular 4×4 grid.

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