Abstract
The properties of cardiovascular device is closely correlated with blood flows. Because they depend on fluid force, excessive high shear stress related to hemolysis, and flow stagnation related to thrombogenesis. Thus, fluid dynamics analysis is a key technology to optimize the geometric design. There are two fluid dynamic analyses which are the CFD (computational fluid dynamics) analysis and EFD (experimental fluid dynamics) analysis. The CFD analysis is mainly used for simple geometry and steady flow with the result's validation of EFD analysis. On the other hand, the EFD analysis is mainly used for complicated geometry and/or unsteady flow. The important thing is that the results from those analyses should be corresponded with the pump properties. The correspondence is easily confirmed concerning the fluid force. But it is not so easily confirmed concerning the hemo-compatibility such as hemolysis or thrombogenesis because it requires enough clinical experiences. The rule of thumb turns to the quantitative index for evaluation established by several experts. Those evaluation technologies should be the powerful tool when developing various cardiovascular devices.
