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A Seal‐less Centrifugal Pump (Baylor Gyro Pump) for Application to Long‐Term Circulatory Support
Author(s) -
Minato Naoki,
Sakuma Ichiro,
Sasaki Tatsuya,
Shiono Motomi,
Ohara Yasuhisa,
Takatani Setsuo,
Noon George P.,
Nose Yukihiko
Publication year - 1993
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.1525-1594.1993.tb00383.x
Subject(s) - impeller , centrifugal pump , rotodynamic pump , axial flow pump , rotor (electric) , stator , bearing (navigation) , volute , mechanical engineering , gyroscope , engineering , seal (emblem) , hydraulic pump , reciprocating pump , progressive cavity pump , physics , aerospace engineering , astronomy , art , visual arts
Abstract: We are developing a new centrifugal pump, the Baylor Gyro Centrifugal Pump (Gyro Pump), which can function for more than 2 weeks. The concept of the Gyro Pump is that a one‐piece rotor‐impeller with embedded permanent magnets, driven directly by a brushless direct current motor stator placed outside, rotates like a “gyro‐scope,” and the rotor‐impeller is supported by one pivot bearing at the bottom in accordance with the gyroscopic principle. This concept enables us to eliminate a driving shaft and a seal between the driving shaft and the blood chamber, which results in extending the life of the centrifugal pump. The blood passes through the space between the motor stator and the rotor to the impeller portion. In this preliminary phase, two pivot bearings were applied to support the rotor‐impeller at the top and the bottom inside the blood chamber. Both pivot bearings showed less blood trauma and less thrombogenicity in in vitro and in vivo studies. The Gyro Pump is a promising second‐generation centrifugal pump for long‐term circulatory support in the near future.