| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 94 === The aims of this study are using numerical approaches to simulate flow variations in pulmonary artery of patients of Tetralogy of Fallot, which is one of the congenital heart diseases in children. We analyze the flow patterns in an in vitro bifurcation pulmonary artery and consider effects of various regurgitation ratios(b/f) in left pulmonary artery(LPA) and right pulmonary artery(RPA). We do not only observe the variation of flow patterns, but also analyze the results of b/f and volumetric flow rates in LPA and RPA. In general, the b/f of LPA is higher than RPA in the mesured data provided by Kaohsiung veterans general hospital. We validate the result using numerical approaches to analyze the flow patterns in pulmonary artery in this study.
We use predicted flow patterns to explain why the b/f of LPA is higher than RPA. It is because the duration of regurgitation in LPA is longer than in RPA. In terms of predicted results, we can know if the b/f of main pulmonary artery(MPA) increases, so will b/fs of LPA and RPA. The b/f of LPA is higher than RPA both in this study and the mesured data of the hospital. It is consistent with the flow patterns predicted by this study. We also can find the difference of netflow between LPA and RPA is tiny when the b/f of MPA is low. On the contrast, the difference of netflow between LPA and RPA will increase if the b/f of MPA is raised.
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