We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Analysis of Aortic Arch Hemodynamics With Simulated Bird's Beak Effects.
- Authors
Gonzalez-Urquijo, Mauricio; Fumagal González, Gerardo Alejandro; Cárdenas Castro, Héctor Manuel; Morales Guzman, Arnulfo Alejandro; Guzman Valladares, Alan Alejandro; MacDonald, Danielle Catherine; Moya Bencomo, Marcos David; Botello Arredondo, Israel; Fabiani, Mario Alejandro
- Abstract
Objective: The objective of this study was to investigate the flow effects in different degrees of thoracic aortic stent graft protrusion extension by creating bird beak effect simulations using accurate 3D geometry and a realistic, nonlinear, elastic biomechanical model using computer-aided software SolidWorks. Methods: Segmentation in 3D of an aortic arch from a computed tomography (CT) scan of a real-life patient was performed using SolidWorks. A parametric analysis of three models was performed: (A) Aortic arch with no stent, (B) 3 mm bird-beak configuration, and (C) 6.5 mm bird-beak configuration. Flow velocity, pressure, vorticity, wall shear stress (WSS), and time average WSS were assessed. Results: The flow velocity in Model A remained relatively constant and low in the area of the ostium of the brachiocephalic artery and doubled in the left subclavian artery. On the contrary, Models B and C showed a decrease in velocity of 52.3 % in the left subclavian artery. Furthermore, Model B showed a drop in velocity of 82.7% below the bird-beak area, whereas Model C showed a decline of 80.9% in this area. The pressure inside the supra-aortic branches was higher in Model B and C compared with Model A. In Model A, vorticity only appeared at the level of the descending aorta, with low to non-vorticity in the aortic arch. In contrast, Models B and C had an average vorticity of 241.4 Hz within the bird beak area. Regarding WSS, Model A, and Model B shared similar WSS in the peak systolic phase, in the aortic arch, and the bird beak area, whereas Model C had an increased WSS by 5 Pa on average at these zones. Conclusion: In the present simulations' lower velocities, higher pressures, vortices, and WSS were observed around the bird beak zone, the aortic arch, and the supra-aortic vessels.
- Subjects
COMPUTER simulation; BIOLOGICAL models; TRANSPLANTATION of organs, tissues, etc.; COMPUTER-aided design; DIAGNOSTIC imaging; THREE-dimensional imaging; SUBCLAVIAN artery; COMPUTED tomography; PARAMETERS (Statistics); ENDOVASCULAR surgery; SURGICAL stents; HEMODYNAMICS; BLOOD vessel prosthesis; MATHEMATICAL statistics; ARTERIAL pressure; BLOOD flow measurement; COMPUTERS in medicine; BLOOD circulation; THORACIC aorta; PROSTHESIS design &; construction; BRACHIAL artery
- Publication
Vascular & Endovascular Surgery, 2024, Vol 58, Issue 6, p595
- ISSN
1538-5744
- Publication type
Article
- DOI
10.1177/15385744241247272