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AJNR - American Journal of Neuroradiology

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Changes of Intra-Aneurysmal Pressure during Coiling

Ajay K. Wakhloo^a

^a Department of Radiology and Neurological Surgery
University of Massachusetts
Worcester, Mass

Baruch B. Lieber^b

^b Department of Radiology and Biomedical Engineering
University of Miami
Coral Gables, Fla

View larger version (53K): [in a new window]   Fig 1. A, Aneurysm geometry. B, Characteristic lengths: R = 4 mm; e1 = 0.3 mm; r1 = 0.5 mm; r2 = 1.6 mm; C = 2 mm. Case 1: e = 0.1 mm; = 0 mm. Case 2: emini = 0.05 mm; = 0.05 mm. C, Aneurysm with 100% coil filling.

View larger version (34K): [in a new window]   Fig 2. Numerical results deduced from simulations of the flow through the aneurysm with various packing of coils. A, = 1 (no coil). B, = 0.5. C, = 0.05. Because of the symmetry of the model, the numerical results are shown for only one quarter of the sac.

View larger version (29K): [in a new window]   Fig 3. Evolution of the ratio Von Mises stress/pressure. Case 1: e = 0.1 mm; = 0 mm. A, Aneurysm without coil. B, Aneurysm with 100% coil filling.

View larger version (31K): [in a new window]   Fig 4. Evolution of the ratio Von Mises stress/pressure. Case 2: emini = 0.05 mm; = 0.05 mm. A, Aneurysm without coil. B, Aneurysm with 100% coil filling.