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Impeller Design for a Miniaturized Centrifugal Blood Pump
Author(s) -
Takano Tamaki,
SchulteEistrup Sebastian,
Yoshikawa Masaharu,
Nakata Kinichi,
Kawahito Shinji,
Maeda Tomohiro,
aka Kenji,
Linneweber Joerg,
Glueck Julie,
Fujisawa Akira,
Makinouchi Kenzo,
Yokokawa Michihiro,
Nosé Yukihiko
Publication year - 2000
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.1525-1594.2000.06630.x
Subject(s) - impeller , centrifugal pump , specific speed , materials science , rotational speed , rotodynamic pump , mechanical engineering , hydraulic pump , radial piston pump , engineering , progressive cavity pump
The impeller design for a miniature centrifugal blood pump is an important consideration since the small diameter impeller requires higher rotational speed, which may cause more blood trauma compared to the larger diameter impeller. Three different impeller vanes (straight vanes with a height of 4 mm and 8 mm, and 8 mm curved vanes) of which the diameter was 35 mm were subjected to hydraulic performance and hemolysis tests in the same pump housing. Both straight vane impellers attained left ventricular assist condition (5 L/min against 100 mm Hg) at 2,900 rpm while the curved vane required 3,280 rpm. There was no significant hemolysis difference between the tall and short vanes. The curved impeller vanes did not exhibit sufficient hydraulic performance when compared to the straight vanes. The straight vane impellers, even with different heights, were incorporated into the same pump housings, and the vane heights did not drastically change the hydraulic performance or hemolysis.