Development of the pulsation device for rotary blood pumps

Tomoyuki Yambe, Yasuyuki Shiraishi, Kazumitsu Sekine, Mune Ichi Shibata, Tasuku Yamaguchi, Liu Hong Jian, Makoto Yoshizawa, Akira Tanaka, Hidetoshi Matsuki, Fumihiro Sato, You Ichi Haga, Masayoshi Esashi, Kouichi Tabayashi, Yoshinori Mitamura, Hiroshi Sasada, Shin Ichi Nitta

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A rotary blood pump (RP) is desirable as a small ventricular assist device (VAD). However, an RP is nonpulsatile. We tried to develop a device that attaches a pulse to the RP. We also tried to develop a pulse-generating equipment that was not air-pressure driven. The ball screw motor was considered a candidate. The application of a small-sized shape memory alloy was also attempted. An electrohydraulic system was adopted, and actuator power was connected to the diaphragm. The diaphragm was placed on the outer side of the ventricle. Most RPs that have been developed all over the world drain blood from the ventricle. The wave of a pulse should be generated if a pulse is added by the drawn part. The output assistance from the outer side of the ventricle was attempted in animal experiments, and the device operated effectively. This device can be used during implantable operation of RP. This may serve as an effective device in patients experiencing problems in peripheral circulation and in the function of internal organs.

Original languageEnglish
Pages (from-to)912-915
Number of pages4
JournalArtificial Organs
Issue number11
Publication statusPublished - 2005 Nov


  • Artificial myocardium
  • Ball screw
  • Electrohydraulic
  • Pulsation device
  • Rotary blood pump

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering


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