教師資料查詢 | 類別: 期刊論文 | 教師: 盧博堅 LU PO-CHIEN (瀏覽個人網頁)

標題:Measurement of retrograde flow field of bileaflet artificial heart valves
學年87
學期1
出版(發表)日期1999/01/01
作品名稱Measurement of retrograde flow field of bileaflet artificial heart valves
作品名稱(其他語言)
著者Lu, Po-chien; Hsu, Jui-lien; Chu, Shu-hsun
單位淡江大學水資源及環境工程學系
出版者Singapore: World Scientific Publishing Co. Pte. Ltd.
著錄名稱、卷期、頁數Biomedical engineering: applications basis communications 11(1), pp.11-18
摘要This study focuses on a series of in-vitro tests on retrograde flow fields of four clinically-used artificial bileaflet aortle valves, St. Jude Medical (SJM), CarboMedics (CM), Edwards Tekna modified DuroMedics (DM), and Sorin Bicarbon (SB). The flow fields of the valves were measured with a laser Doppler anemometer (LDA) at the upstream area near the valves. The measurement points were concentrated at the locations where the greatest retrograde flow occurs when the leaflets close, which are the gaps in between the leaflets, in between the leaflets and housing ring, and at the hinges. The valves were placed inside a circulatory mock loop in which the heart rate was set at 70 beats per minute, the cardiac output was maintained at 5 liters per minute, and the aortic pressure wave forms were kept within the physiological range. The valves were compared according their mean velocities, Reynalds stresses, as well as their effects on retrograde flow fields and blood cell damage. The mean velocities of the retrograde flow fields of SJM, CM, DM, and SB valves all reach maximum values at the center of the gap between the closed leaflets during the early stages of diastole. SB has the greatest mean velocity and principal Reynolds shear stress values, followed by DM, SJM, and CM. The maximum Reynolds shear stress values of all four valves exceed the threshold of platelet damage, thus increasing the possibility of thrombosis.
關鍵字
語言英文
ISSN1016-2372;1793-7132
期刊性質國外
收錄於EI
產學合作
通訊作者
審稿制度
國別新加坡
公開徵稿
出版型式紙本
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