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Pulsatile blood pump with a linear drive actuator

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Abstract

The main purpose of this study was to develop an implantable direct-electromagnetic left ventricular assist system driven by a linear actuator (linear LVAS). The linear LVAS is a pulsatile pump with a pusher plate that is driven directly by a linear oscillatory actuator (LOA) without any movement converters. This prototype pump unit with a LOA was 100 mm in diameter, 50 mm in thickness, and weighed 740 g. The full-fill/full-eject driving method was applied to the control algorithm. In addition, a mechanism to detect and release sucking was realized to overcome this problem that accompanies the active-filling type of VAS. The performance of the linear LVAS was evaluated in a long-term animal experiment using a goat (56 kg). The goat survived for 42 days. The reason why we terminated this experiment was that thrombus was found in the pump. There was no frictional debris found around the LOA. The linear LVAS did not exhibit electrical or mechanical problems during the first animal experiment.

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Authors and Affiliations

  1. Department of Clinical Engineering, Faculty of Health Science, Kyorin University, 476 Miyashitacho, Hachioji, Tokyo, 192-8508, Japan

    Kazuyoshi Fukunaga PhD

  2. Department of Artificial Organs, National Cardiovascular Center Research Institute, Osaka, Japan

    Akihiko Homma PhD, Eisuke Tatsumi MD, Yoshiyuki Taenaka MD & Soichiro Kitamura MD

  3. Department of Electronic and Computer Engineering, Tokyo Denki University, Saitama, Japan

    Akio Funakubo PhD & Yasuhiro Fukui PhD

Authors
  1. Kazuyoshi Fukunaga PhD
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  2. Akihiko Homma PhD
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  3. Akio Funakubo PhD
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  4. Eisuke Tatsumi MD
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  5. Yoshiyuki Taenaka MD
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  6. Soichiro Kitamura MD
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  7. Yasuhiro Fukui PhD
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Corresponding author

Correspondence to Kazuyoshi Fukunaga PhD.

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Fukunaga, K., Homma, A., Funakubo, A. et al. Pulsatile blood pump with a linear drive actuator. J Artif Organs 10, 77–84 (2007). https://doi.org/10.1007/s10047-007-0375-2

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  • DOI: https://doi.org/10.1007/s10047-007-0375-2

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