バルサルバ洞の有無が大動脈弁周辺の血流動態と弁機能に及ぼす影響 : 実形状モデルを用いた生体外模擬実験による定量評価 Influence of Valsalva Sinus on Flow Field around the Aortic Valve and the Valve Characteristics : Quantitative Evaluation by Experiments in vitro Using a Realistic Model

この論文をさがす

著者

抄録

One of the well known cures for the annuloaortic ectasia is a vascular grafting surgery using a composite graft as an artificial ascending aorta and an artificial valve. Although, almost all conventional grafts do not have Valsalva sinus at the aortic root, the influence of omitting the Valsalva sinus have not yet been clarified. In order to understand the effect of the Valsalva sinuses at aortic root on the valve characteristics and flow field around the valve and furthermore the coronary blood flow, the authors have fabricated some realistic models of aortic valve using three-dimensional modeling machine, and have investigated the effect of the sinus existence by particle image velocimetry (PIV). As the result, the fluctuation of flow rate at coronary artery in the case of the straight wall model was larger than the Valsalva sinus model. The valve leaflets were pulled to the left ventricle, which could cause a diastolic regurgitant flow from the aorta into the left ventricle. The leaflet suction in the Valsalva sinus model was weaker than the straight wall model. Flow visualization results showed that vortex flow occurred in the Valsalva sinus due to jet flow through the valve leaflets during systole. At early diastole, flow into coronary artery around the Valsalva sinus was smoothly than the straight wall model. Consequently it was concluded from a standpoint of flow and valve characteristics that the Valsalva sinus had an important role for the aortic valve and the inlet of the coronary circulation.

収録刊行物

  • 日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B

    日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B 73(725), 231-238, 2007-01-25

    一般社団法人日本機械学会

参考文献:  11件中 1-11件 を表示

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    110006165278
  • NII書誌ID(NCID)
    AN00187441
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03875016
  • NDL 記事登録ID
    8663747
  • NDL 雑誌分類
    ZN11(科学技術--機械工学・工業)
  • NDL 請求記号
    Z16-109
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS 
ページトップへ