Development of a novel centrifugal pump: Magnetic rotary pump

Shigeru Naganuma, Tomoyuki Yambe, Taro Sonobe, Shin Ichi Kobayashi, Shin Ichi Nitta

Research output: Contribution to journalReview articlepeer-review

2 Citations (Scopus)


The rotational axis of the centrifugal pump has some associated problems such as blood destruction and sealing between the axis and pump housing. To improve upon these deficits we have developed a new type of blood pump, the magnetic rotary pump (MRP). The MRP has an original design with no rotational axis and no impellers. We made a prototype MRP and examined its hemodynamics in mock circulation. The prototype MRP flow rate is only 1.0 L/min with an afterload of 30 mm Hg, and we have made some modifications in the size and drive mechanisms from these results. The modified MRP can achieve high flow rates and rotational speeds (6.0 L/min with an afterload of 100 mm Hg, 2,000 rpm) in a mock circuit, and the modified MRP was used for left heart assistance in an acute animal experiment. The MRP could maintain the hemodynamics of an anesthetized adult goal. These results suggest that the MRP needs to be improved in several areas, but the MRP may be useful as a blood pump.

Original languageEnglish
Pages (from-to)746-750
Number of pages5
JournalArtificial Organs
Issue number7
Publication statusPublished - 1997


  • Linear motor drive
  • Magnetic rotary pump
  • New centrifugal pump


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