大動脈弁位における傾斜型ディスク弁の至適弁装着方向とその水力学的特性に関する実験的検討
書誌事項
- タイトル別名
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- Optimal valve orientation of tilting disc valve prostheses in the aortic position and in-vitro evaluation of their hydraulic characteristics.
説明
The effect of valve orientation on the hydraulic characteristics of aortic valve prostheses was studied by using a total mock system of human left heart and aorta. The system replicated the geometry of left heart and aortic arch having a pertinent hydraulic load of the systemic circulation so that the flow process simulated a physiological pulsatile condition. Simultaneous flow visualization study was carried out to investigate the dependence of valve orientation on the flow development in the aortic arch. Five different tilting disc valves, Björk-Shiley spherical, Beörk-Shiley convexo-concave, Björk-Shiley monostrut, Medtronic-Hall, and Omni-Science valves, each having an annulus diameter of 25mm, were evaluated as to how the valve insertion should be oriented. Total hydraulic evaluations regarding systolic energy loss, resistive coefficient as well as the turbulent flow formation suggested that the major orifice of these valves should be oriented towards the aortic outer curvature. The outer curve orientation provided low systolic energy loss and low resistive coefficient. These findings were found to be in good agreement with the clinically and empirically arrived approvals of valve orientation.
収録刊行物
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- 医用電子と生体工学
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医用電子と生体工学 28 (1), 33-41, 1990
一般社団法人 日本生体医工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679531794688
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- NII論文ID
- 130004326763
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- ISSN
- 21855498
- 00213292
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
