Flow characteristics of five types of prosthetic valves

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Flow characteristics of five types of prosthetic valves were evaluated with pulsatile flow.Valves tested were the Starr-Edwards valve, the Björk-Shiley valve, the Hall-Kaster valve, the S. J. M. valve and the Hancock xengraft.Aluminium micro-leaves were mixed into the water of the pulse duplicating system. Flow characteristics of the valves were observed and photographed in each phase by 16mm movie and 35mm black and white film.The Starr-Edwards valve caused extensive stagnation of flow.The Björk-Shiley valve and the Hall-Kaster valve produced turblance flow with similar direction. The stagnation at the small aperture side of the Hall-Kaster valve was smaller than that of the Björk-Shiley valve. The S. J. M. valve showed two stagnation near the central portion arround the hinge. The Hancock xenograft showed central jetting flow and the stagnation caused by the cusp.
一般社団法人日本人工臓器学会の論文