頁籤選單縮合
題 名 | Analysis of the Effect of Sewing Ring Geometry on Fluid Flow Past Bi-Leaflet Mechanical Heart Valves |
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作 者 | Hsu, Cheung-hwa; | 書刊名 | Biomedical Engineering: Applications, Basis and Communications |
卷 期 | 19:2 2007.04[民96.04] |
頁 次 | 頁129-136 |
分類號 | 410.1644 |
關鍵詞 | Sewing ring; Aortic valve; Opening angle; |
語 文 | 英文(English) |
英文摘要 | This paper concentrates on the effect of sewing ring geometry design on fluid flow past the prototype bi-leaflet aortic valve. To simulate the hemodynamic characteristics of the blood flow, CFX-4.3 software with finite volume method of analyzing the three-dimensional Rehynolds-averaged Navier-Stokes equations is adopted. With the analysis model, we predict the blood velocity and the shear stress over the flow filed. The data provide information for the improvement of sewing ring geometry in order to minimize occurrence of hemolysis. An analysis of hemodynamic study for the St. Jude valve with various opening angles is present first and the geometry change is then recommended. After modifying the geometry of the sewing ring, the blood velocity slows down obviously. Maximum flow velocity reduces 54% compared to that of the original St. Jude model at peak systole. On the other hand, shear stress of aortic wall decreases accordingly. This wuld ease possible damage of endothelial cell of the aorta. |
本系統中英文摘要資訊取自各篇刊載內容。