Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational Study
A three-dimensional (3D) computational fluid dynamics study of shear rates around distal end-to-side anastomoses has been conducted. Three 51% and three 75% cross-sectional area-reduced 6 mm cylinders were modeled each with a bypass cylinder attached at a 30-degree angle at different placements dist...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Engineering |
| Online Access: | http://dx.doi.org/10.1155/2013/185823 |
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| _version_ | 1850167141136859136 |
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| author | John Di Cicco Ayodeji Demuren |
| author_facet | John Di Cicco Ayodeji Demuren |
| author_sort | John Di Cicco |
| collection | DOAJ |
| description | A three-dimensional (3D) computational fluid dynamics study of shear rates around distal end-to-side anastomoses has been conducted. Three 51% and three 75% cross-sectional area-reduced 6 mm cylinders were modeled each with a bypass cylinder attached at a 30-degree angle at different placements distal to the constriction. Steady, incompressible, Newtonian blood flow was assumed, and the full Reynolds-averaged Navier-Stokes equations, turbulent kinetic energy, and specific dissipation rate equations were solved on a locally structured multiblock mesh with hexahedral elements. Consequently, distal placement of an end-to-side bypass graft anastomosis was found to have an influence on the shear rate magnitudes. For the 75% constriction, closer placements produced lower shear rates near the anastomosis. Hence, there is potential for new plaque formation and graft failure. |
| format | Article |
| id | doaj-art-db7817a4194d4eeba83f79a51e92540f |
| institution | OA Journals |
| issn | 2314-4904 2314-4912 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Engineering |
| spelling | doaj-art-db7817a4194d4eeba83f79a51e92540f2025-08-20T02:21:16ZengWileyJournal of Engineering2314-49042314-49122013-01-01201310.1155/2013/185823185823Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational StudyJohn Di Cicco0Ayodeji Demuren1Department of Mechanical and Aerospace Engineering, Old Dominion University, Norfolk, VA 23529, USADepartment of Mechanical and Aerospace Engineering, Old Dominion University, Norfolk, VA 23529, USAA three-dimensional (3D) computational fluid dynamics study of shear rates around distal end-to-side anastomoses has been conducted. Three 51% and three 75% cross-sectional area-reduced 6 mm cylinders were modeled each with a bypass cylinder attached at a 30-degree angle at different placements distal to the constriction. Steady, incompressible, Newtonian blood flow was assumed, and the full Reynolds-averaged Navier-Stokes equations, turbulent kinetic energy, and specific dissipation rate equations were solved on a locally structured multiblock mesh with hexahedral elements. Consequently, distal placement of an end-to-side bypass graft anastomosis was found to have an influence on the shear rate magnitudes. For the 75% constriction, closer placements produced lower shear rates near the anastomosis. Hence, there is potential for new plaque formation and graft failure.http://dx.doi.org/10.1155/2013/185823 |
| spellingShingle | John Di Cicco Ayodeji Demuren Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational Study Journal of Engineering |
| title | Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational Study |
| title_full | Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational Study |
| title_fullStr | Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational Study |
| title_full_unstemmed | Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational Study |
| title_short | Distal Placement of an End-to-Side Bypass Graft Anastomosis: A 3D Computational Study |
| title_sort | distal placement of an end to side bypass graft anastomosis a 3d computational study |
| url | http://dx.doi.org/10.1155/2013/185823 |
| work_keys_str_mv | AT johndicicco distalplacementofanendtosidebypassgraftanastomosisa3dcomputationalstudy AT ayodejidemuren distalplacementofanendtosidebypassgraftanastomosisa3dcomputationalstudy |