J.Jpn. Surg. Soc.. 89(11): 1893-1902, 1988
Original article
IN VITRO EVALUATION OF HYDRODYNAMICS OF PROSTHETIC HEART VALVES
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The 2nd Department of Surgery, Hokkaido University, School of Medicine, Sapporo, Japan Jun Okude |
Using the circulation system, various prosthetic heart valves were tested in the simulative states of normal hemodynamics, low output, arrhythmia, hypovolemia, and vasoconstriction. The flow-pressure gradient analysis demonstrated the characteristics of each valves clearly. The St. Jude Medical valve showed the superior valve characteristics over other mechanical valves.
The opening angles of the tilting disc prosthetic valves were also studied in the same simulative circulation using the photosensor system with real-time monitoring. In contrast to our clinical experiences of poor opening of Omniscience valve in the mitral position, limitatin of the opening angle of the valve was not observed in this in vitro study.
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