| Numerical simulation of hemodynamics in the ascending aorta induced by different aortic cannulas. | |
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MedLine Citation:
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PMID: 21417846 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Abstract There is still a lack of quantitative information concerning optimal blood flow in the aorta and in the carotid arteries during extracorporeal circulation (ECC). Problems are not only based on the location of the aortic cannula, they are furthermore associated with the cannula design itself and the effects on blood cells and aortic wall shear stresses. We simulated a two-phase fluid flow induced by different cannulas in the ascending aorta during ECC. Three commercially available cannulas were examined according to their influence on red blood cells (RBC). Additionally, mass flow in the carotid vessels and wall shear stresses acting on the aortic wall were evaluated. A constant volume flow of blood (3.4 L/min) was applied. Numerical results demonstrate a strong relation between the mass flow rate in the carotid vessels and the geometry of the aortic outflow cannula. RBC distributions both in the aorta and the carotid vessels changed depending on cannula geometry. Maximum blood velocities, shear stresses on the aortic wall, and the fluid mechanical load acting on RBCs varied depending on each cannula design. This numerical approach demonstrates the significant influence of the cannula design on the distribution of RBCs in the carotid vessels during ECC. |
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Authors:
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Sebastian Stühle; Daniel Wendt; Heinz Jakob; Wojciech Kowalczyk |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Minimally invasive therapy & allied technologies : MITAT : official journal of the Society for Minimally Invasive Therapy Volume: 20 ISSN: 1365-2931 ISO Abbreviation: Minim Invasive Ther Allied Technol Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9612996 Medline TA: Minim Invasive Ther Allied Technol Country: England |
Other Details:
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Languages: eng Pagination: 125-31 Citation Subset: IM |
Affiliation:
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Chair of Mechanics and Robotics, University of Duisburg-Essen, Duisburg, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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