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Volume 48, Issue 2 , Pages 303-310 , August 2008

A computational fluid dynamic study of stent graft remodeling after endovascular repair of thoracic aortic dissections

Presented at the Twentieth Annual Meeting of the Western Vascular Society, Kona, Hawaii, Sep 8-11, 2007.

Stephen W.K. Cheng, MS
- Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
- Reprint requests: Stephen W. K. Cheng, Division of Vascular Surgery, Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, Pokfulam Road, Hong Kong.
Edward S.K. Lam, MPh
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China
George S.K. Fung, PhD
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China.
Pei Ho, MB, BS
- Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
Albert C.W. Ting, MS
- Department of Surgery, University of Hong Kong Medical Centre, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
Kwok W. Chow, BS, PhD
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China

Received 12 December 2007 ,Accepted 27 March 2008.

Blood flow waveform (a) and blood pressure waveform (b). The period is one second per cycle. Peak flow occurred at 0.25 seconds and peak pressure at 0.3 seconds.

Blood flow waveform (a) and blood pressure waveform (b). The period is one second per cycle. Peak flow occurred at 0.25 seconds and peak pressure at 0.3 seconds.
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a, Geometric parameters defining the stent graft model. b, Surface mesh elements created for the fluid domain. d, Diameter of the stent graft; θ, position of deployment of stent graft in clockwise dir

a, Geometric parameters defining the stent graft model. b, Surface mesh elements created for the fluid domain. d, Diameter of the stent graft; θ, position of deployment of stent graft in clockwise direction from aortic valve; D, diameter of curvature of the aortic arch.
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Patient-derived CFX model of fluid dynamics velocity and vector plot in a thoracic stent graft before (left) and after (right) remodeling.

Patient-derived CFX model of fluid dynamics velocity and vector plot in a thoracic stent graft before (left) and after (right) remodeling.
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Relationship between the drag force acting on the stent graft and the cardiac cycle.

Relationship between the drag force acting on the stent graft and the cardiac cycle.
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Relationship between the drag force due to net momentum change and the internal diameter of the thoracic stent graft (d) (a), the deployment position of the thoracic stent graft (θ) (b), and the diame

Relationship between the drag force due to net momentum change and the internal diameter of the thoracic stent graft (d) (a), the deployment position of the thoracic stent graft (θ) (b), and the diameter of curvature of the aortic arch (D) (c).
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Changes in the inlet area (a), the outlet area (b), and the drag force of the thoracic stent grafts (c).

Changes in the inlet area (a), the outlet area (b), and the drag force of the thoracic stent grafts (c).
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