Ripple reduction control of the undulation pump total artificial heart

Itsuro Saito, Tsuneo Chinzei, Shuichi Mochizuki, Yusuke Abe, Takashi Isoyama, Kiyotaka Iwasaki, Takafumi Suzuki, Tatsuro Karita, Toshiya Ono, Akimasa Kouno, Mitsuhiko Ishimaru, Atsushi Baba, Toshinaga Ozeki, Takahiro Tohyama, Shin Ichi Kobayashi, Kou Imachi

    Research output: Contribution to journalArticle

    Abstract

    An undulation pump total artificial heart (UPTAH) in which the revolutions of the motor are converted to undulation motion of a disk has been developed. In an experiment, a goat using the UPTAH survived for 54 days. However, a large ripple was observed in the device's output pressure and flow waveform. In calculating the spectrum of the ripple, we found that the ripple mainly comprised 2 frequency sine waves: 1 having the same frequency as and 1 having double the frequency of the motor revolutions. To reduce the ripple, 2 sine waves, 1 having the same frequency as and 1 having double the frequency of the motor revolutions, were provided to the motor current to modulate the pulse width of the pulse width modulation controlling the motor revolutions. This ripple control method reduced the pressure ripple by 90% in a mock circulation and by 70% in animal experiments. These results revealed that the ripple generated in the UPTAH could be controlled through the use of motor control software.

    Original languageEnglish
    Pages (from-to)40-44
    Number of pages5
    JournalArtificial Organs
    Volume26
    Issue number1
    DOIs
    Publication statusPublished - 2002

    Fingerprint

    Artificial heart
    Artificial Heart
    Pumps
    Pressure
    Goats
    Software
    Equipment and Supplies
    Pulse width modulation
    Animals
    Experiments

    Keywords

    • Ripple reduction control
    • Total artificial heart
    • Undulation pump

    ASJC Scopus subject areas

    • Biophysics

    Cite this

    Saito, I., Chinzei, T., Mochizuki, S., Abe, Y., Isoyama, T., Iwasaki, K., ... Imachi, K. (2002). Ripple reduction control of the undulation pump total artificial heart. Artificial Organs, 26(1), 40-44. https://doi.org/10.1046/j.1525-1594.2002.06798.x

    Ripple reduction control of the undulation pump total artificial heart. / Saito, Itsuro; Chinzei, Tsuneo; Mochizuki, Shuichi; Abe, Yusuke; Isoyama, Takashi; Iwasaki, Kiyotaka; Suzuki, Takafumi; Karita, Tatsuro; Ono, Toshiya; Kouno, Akimasa; Ishimaru, Mitsuhiko; Baba, Atsushi; Ozeki, Toshinaga; Tohyama, Takahiro; Kobayashi, Shin Ichi; Imachi, Kou.

    In: Artificial Organs, Vol. 26, No. 1, 2002, p. 40-44.

    Research output: Contribution to journalArticle

    Saito, I, Chinzei, T, Mochizuki, S, Abe, Y, Isoyama, T, Iwasaki, K, Suzuki, T, Karita, T, Ono, T, Kouno, A, Ishimaru, M, Baba, A, Ozeki, T, Tohyama, T, Kobayashi, SI & Imachi, K 2002, 'Ripple reduction control of the undulation pump total artificial heart', Artificial Organs, vol. 26, no. 1, pp. 40-44. https://doi.org/10.1046/j.1525-1594.2002.06798.x
    Saito, Itsuro ; Chinzei, Tsuneo ; Mochizuki, Shuichi ; Abe, Yusuke ; Isoyama, Takashi ; Iwasaki, Kiyotaka ; Suzuki, Takafumi ; Karita, Tatsuro ; Ono, Toshiya ; Kouno, Akimasa ; Ishimaru, Mitsuhiko ; Baba, Atsushi ; Ozeki, Toshinaga ; Tohyama, Takahiro ; Kobayashi, Shin Ichi ; Imachi, Kou. / Ripple reduction control of the undulation pump total artificial heart. In: Artificial Organs. 2002 ; Vol. 26, No. 1. pp. 40-44.
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