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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44614


    Title: Turbulence measurements in the vicinity of bileaflet aortic valve prostheses in steady flow
    Authors: Liu, Jia-Shing;Lu, Po-Chien;Chu, Shu-Hsun
    Contributors: 淡江大學水資源及環境工程學系
    Date: 1998
    Issue Date: 2010-03-26 16:31:56 (UTC+8)
    Publisher: Singapore: World Scientific Publishing Co. Pte. Ltd.
    Abstract: A two dimensional laser Doppler anemometer system has been used to measure the turbulent shear fields in the immediate downstream vicinity of a variety of mechanical and bioprosthetic aortic heart valves. The measurements revealed that all the mechanical valves studied, created regions of elevated levels of turbulent shear stress during the major portion of systole. The tissue bioprostheses also created elevated levels of turbulence, but they were confined to narrow regions in the bulk of the flow field. The newer generation of bioprostheses create turbulent shear stresses which are considerably lower than those created by the older generation tissue valve designs. All the aortic valves studied (mechanical and tissue) create turbulent shear stress levels which are capable of causing sub-lethal and/or lethal damage to blood elements.
    Relation: Biomedical engineering: applications basis communications 10(5), pp.257-261
    Appears in Collections:[水資源及環境工程學系暨研究所] 期刊論文

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