Hydrodynamic characteristics of the tilting disk valves, including newly-developed EMIKS valve.

概要

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In-vitro hydrodynamic tests of six disk-type prosthetic heart valves including newly-developed EMIKS(E-M)valve were performed. This EMIKS valve was made in Soviet Union and its configuration was similar to that of Bjork Shiley mono-strut valve(BS(MS)). The results were as follows; 1)The pressure gradients across the E-M under steady flow were similar to those across other disk valves. 2)In the aortic position, E-M had the same effective orifice area(EOA)as Bjork Shiley or BS (MS). 3)In the mitral position, the EOA of E-M was larger than that of B-S. Opening and closing response at a high pulse rate condition of E-M was the excellent among the valves tested in terms of pressure gradient and pump flow. In conclusion, this E-M would be considered to have an adequate hemodynamic characteristics for clinical use.
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