These three pieces are parts from the Lillehei-Nakib Toroidal Disc Mitral valves. There is one donut, one valve without a cloth suture, and one complete valve. The design is toroidal, meaning donut ...

This is a Lillehei-Kaster tilting-disc valve made of pyrolytic carbon. Approximately 17,500 of these valves were distributed. It is made of titanium and pyrolite-coated graphite. It has a low embolic ...

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Fluid-handling devices are not basically concerned with the modulation of power, but only with the movement of fluid. Choosing a fluid-handling valve used to be easy, because each one had its own area ...