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Study of Secondary Flow in Centrifugal Blood Pumps Using a Flow Visualization Method with a High‐Speed Video Camera
Author(s) -
Sakuma Ichiro,
Fukui Yasuhiro,
Dohi Takeyoshi
Publication year - 1996
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.1996.tb04477.x
Subject(s) - impeller , centrifugal pump , flow visualization , hemolysis , specific speed , flow (mathematics) , visualization , high speed camera , flow velocity , volumetric flow rate , mechanics , blood flow , materials science , computer science , physics , artificial intelligence , computer vision , medicine , immunology
Four pump models with different vane configurations were evaluated with flow visualization techniques using a high‐speed video camera. These models also were evaluated through in vivo hemolysis tests using bovine blood. The impeller having the greatest fluid velocity relative to the impeller, the largest velocity variance, and the most irregular local flow patterns in the flow passage caused the most hemolysis. Even if the pumps were operated at almost the same speed (rpm) at the same output, the impeller showing more irregular flow patterns had a statistically greater rate of hemolysis. This fact confirms that the existence of local irregular flow patterns in a centrifugal blood pump deteriorates its hemolytic performance. Thus, to optimize the design of the pump, it is very important to examine the secondary flow patterns in the centrifugal blood pump in detail using flow visualization with a high‐speed video camera.