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Pivot wear of a centrifugal blood pump developed for circulatory assist

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Abstract

We are developing a monopivot centrifugal pump for circulatory assist for a period of more than 2 weeks. The impeller is supported by a pivot bearing at one end and by a passive magnetic bearing at the other. The pivot undergoes concentrated exposure to the phenomena of wear, hemolysis, and thrombus formation. The pivot durability, especially regarding the combination of male/female pivot radii, was examined through rotating wear tests and animal tests. As a result, combinations of similar radii for the male/female pivots were found to provide improved pump durability. In the extreme case, the no-gap combination would result in no thrombus formation.

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References

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Authors and Affiliations

  1. National Institute of Advanced Industrial Science and Technology, Namiki 1-2-1, Tsukuba, 305-8564, Japan

    Takashi Yamane, Katsunobu Nonaka, Hisashi Miyoshi, Osamu Maruyama, Masahiro Nishida & Ryo Kosaka

  2. School of Engineering, University of Tsukuba, Tsukuba, Japan

    Yoshiyuki Sankai

  3. School of Clinical Medicine, University of Tsukuba, Tsukuba, Japan

    Tatsuo Tsutsui

Authors
  1. Takashi Yamane
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  2. Katsunobu Nonaka
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  3. Hisashi Miyoshi
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  4. Osamu Maruyama
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  5. Masahiro Nishida
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  6. Ryo Kosaka
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  7. Yoshiyuki Sankai
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  8. Tatsuo Tsutsui
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Corresponding author

Correspondence to Takashi Yamane.

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Yamane, T., Nonaka, K., Miyoshi, H. et al. Pivot wear of a centrifugal blood pump developed for circulatory assist. J Artif Organs 11, 232–237 (2008). https://doi.org/10.1007/s10047-008-0431-6

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  • DOI: https://doi.org/10.1007/s10047-008-0431-6

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