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Geometry and respiratory-induced deformation of abdominal branch vessels and stents after complex endovascular aneurysm repair  Brant W. Ullery, MD, Ga-Young.

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Presentation on theme: "Geometry and respiratory-induced deformation of abdominal branch vessels and stents after complex endovascular aneurysm repair  Brant W. Ullery, MD, Ga-Young."— Presentation transcript:

1 Geometry and respiratory-induced deformation of abdominal branch vessels and stents after complex endovascular aneurysm repair  Brant W. Ullery, MD, Ga-Young Suh, PhD, Jason T. Lee, MD, Brian Liu, BS, Robert Stineman, BS, Ronald L. Dalman, MD, Christopher P. Cheng, PhD  Journal of Vascular Surgery  Volume 61, Issue 4, Pages (April 2015) DOI: /j.jvs Copyright © 2015 Society for Vascular Surgery Terms and Conditions

2 Fig 1 Three-dimensional (3D) model construction for endograft, stents, and vessels. A, Computed tomography angiography (CTA) images were loaded to SimVascular software.5 B, Hand-picked paths were constructed along the centers of the lumens of the aorta, celiac artery, superior mesenteric artery (SMA), left renal artery (LRA), and right renal artery (RRA). The lumen of (C) arterial stents, (D) aortic endograft, (E) aorta exterior to the endograft, and (F) visceral arteries was segmented to a set of contours on cross-sectional slices. Examples of cross-sectional slices are shown with lumen contours (red) for corresponding stent, endograft, and native vessel. G, Lumen contours were lofted to form a 3D model with endografts in red and native aorta and visceral arteries in grey. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

3 Fig 2 Quantification of vessel branch angle, end-stent angle, and radius of curvature. A, The branch angle was the angle between the orthogonal axis of the abdominal aorta and the vessel vector from its ostia to 10 mm of arc length distal on the centerline. B, The end-stent angle was the angle between the stent vector and vessel vector originating from the distal boundary of the stent (10 mm of arc length for each). C, The radius of peak curvature was defined from the circumscribed circle formed by three points (spanning 10 mm) on the vessel path at the location of highest curvature within the proximal 30 mm of the branch vessel. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

4 Fig 3 Respiration-induced geometry changes of celiac, superior mesenteric, and renal arteries with stents (red) during inspiration (grey) and expiration (yellow). Examples shown are with (A) snorkeled (Sn)-renal and (B) fenestrated (F)-renal branches with the maximum end-stent angle change in each Sn and F group. L, Left; R, right. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

5 Fig 4 Distribution of end-stent angle change (expiration–inspiration) for (A) snorkel-left renal artery (Sn-LRA), (B) Sn-right renal artery (Sn-RRA), (C) fenestrated-LRA (F-LRA), and (D) F-RRA groups. The end-stent angle change was sorted from lowest to highest. The mean value of end-stent angle change is depicted with a dashed line. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

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