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Flow analysis of medical blood pump for assist circulation is important method to evaluate pump character. CFD (computer fluid dynamics), flow visualization, used to apply for these analysis. These methods could not evaluate the all surface of real blood pump. In this study, we used PSP (Pressure Sensitive Paint) to analyze the pump surface especially impeller surface of centrifugal blood pump. The impeller of centrifugal pump painted on PtTFPP was in the test circulation system and changed the oxygen concentration of water by oxygenator (artificial lung). The intensity of PtTFPP was measured by CCD camera with UV LED excitation. When concentration of oxygen induced into the oxygenator changed from 21% to 100%, the intensity changed on Stern-Volmer's low.

PSP measurements for impeller surface of blood centrifugal pump