期刊論文
| 學年 | 88 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2000-04-01 |
| 作品名稱 | Turbulence Characteristics Downstream of Bileaflet Aortic Valve Prostheses |
| 作品名稱（其他語言） | |
| 著者 | 劉佳興; Liu, Jia-Shing; 盧博堅; Lu, Po-chien; Chu, Shu-hsun |
| 單位 | 淡江大學水資源及環境工程學系 |
| 出版者 | American Society of Mechanical Engineers (ASME) |
| 著錄名稱、卷期、頁數 | Journal of biomechanical engineering 122(2), p.118-124 |
| 摘要 | This study was focused on a series of in vitro tests on the turbulent flow characteristics of three bileaflet aortic valves: St. Jude Medical (SJM), CarboMedics (CM), and Edwards Tekna (modified Duromedics, DM). The flow fields of the valves were measured in a pulsatile flow model with a laser-Doppler anemometer (LDA) at the aortic sinus area downstream of the valves. 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. Cycle-resolved analysis was applied to obtain turbulence data, including mean velocity, Reynolds stresses, autocorrelation coefficients, energy spectral density functions, and turbulence scales. The Reynolds shear stresses of all three valves induced only minor damage to red blood cells, but directly damaged the platelets, increasing the possibility of thrombosis. The smallest turbulence length scale, which offers a more reliable estimate of the effects of turbulence on blood cell damage, was three times the size of red blood cells and five times the size of platelets. This suggests that there is more direct interaction with the blood cells, thus causing more damage. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0148-0731 |
| 期刊性質 | 國外 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44670 ) |