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Development of Design Methods for a Centrifugal Blood Pump with a Fluid Dynamic Approach: Results in Hemolysis Tests
Author(s) -
Masuzawa Toru,
Tsukiya Tomonori,
Endo Seiko,
Tatsumi Eisuke,
Taenaka Yoshiyuki,
Takano Hisateru,
Yamane Takashi,
Nishida Masahiro,
Asztalos Balazs,
Miyazoe Yuki,
Ito Kazuyuki,
Sawairi Toshio,
Konishi Yoshiaki
Publication year - 1999
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 - 10.1046/j.1525-1594.1999.06417.x
Subject(s) - impeller , hemolysis , centrifugal pump , casing , mechanics , rotodynamic pump , blood flow , materials science , engineering , mechanical engineering , radial piston pump , progressive cavity pump , physics , medicine , variable displacement pump , immunology
The purpose of this study was to examine the relationship between local flow conditions and the hemolysis level by integrating hemolysis tests, flow visualization, and computational fluid dynamics to establish practical design criteria for centrifugal blood pumps with lower levels of hemolysis. The Nikkiso centrifugal blood pump was used as a standard model, and pumps with different values of 3 geometrical parameters were tested. The studied parameters were the radial gap between the outer edge of the impeller vane and the casing wall, the position of the outlet port, and the discharge angle of the impeller vane. The effect of a narrow radial gap on hemolysis was consistent with no evidence that the outlet port position or the vane discharge angle affected blood trauma in so far as the Nikkiso centrifugal blood pump was concerned. The radial gap should be considered as a design parameter of a centrifugal blood pump to reduce blood trauma.