A computational fluid dynamic study of stent graft remodeling after endovascular repair of thoracic aortic dissections Stephen W.K. Cheng, MS, Edward.

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Presentation transcript:

A computational fluid dynamic study of stent graft remodeling after endovascular repair of thoracic aortic dissections Stephen W.K. Cheng, MS, Edward S.K. Lam, MPh, George S.K. Fung, PhD, Pei Ho, MB, BS, Albert C.W. Ting, MS, Kwok W. Chow, BS, PhD Journal of Vascular Surgery Volume 48, Issue 2, Pages 303-310 (August 2008) DOI: 10.1016/j.jvs.2008.03.050 Copyright © 2008 The Society for Vascular Surgery Terms and Conditions

Fig 1 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. Journal of Vascular Surgery 2008 48, 303-310DOI: (10.1016/j.jvs.2008.03.050) Copyright © 2008 The Society for Vascular Surgery Terms and Conditions

Fig 2 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. Journal of Vascular Surgery 2008 48, 303-310DOI: (10.1016/j.jvs.2008.03.050) Copyright © 2008 The Society for Vascular Surgery Terms and Conditions

Fig 3 Patient-derived CFX model of fluid dynamics velocity and vector plot in a thoracic stent graft before (left) and after (right) remodeling. Journal of Vascular Surgery 2008 48, 303-310DOI: (10.1016/j.jvs.2008.03.050) Copyright © 2008 The Society for Vascular Surgery Terms and Conditions

Fig 4 Relationship between the drag force acting on the stent graft and the cardiac cycle. Journal of Vascular Surgery 2008 48, 303-310DOI: (10.1016/j.jvs.2008.03.050) Copyright © 2008 The Society for Vascular Surgery Terms and Conditions

Fig 5 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). Journal of Vascular Surgery 2008 48, 303-310DOI: (10.1016/j.jvs.2008.03.050) Copyright © 2008 The Society for Vascular Surgery Terms and Conditions

Fig 6 Changes in the inlet area (a), the outlet area (b), and the drag force of the thoracic stent grafts (c). Journal of Vascular Surgery 2008 48, 303-310DOI: (10.1016/j.jvs.2008.03.050) Copyright © 2008 The Society for Vascular Surgery Terms and Conditions