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A pulsatile pump for cardiopulmonary bypass and its clinical use

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Abstract

A pulsatile pump driven by a coil spring, which was designed and constructed by us, is described in this report. It consists of two main parts, a disposable blood chamber and a driving section. The blood chamber has two leaflet valves and a piston, which is covered with two bellofram rolling diaphragms and moves into the housing to draw in and eject the blood. The driving section consists of three cams, an electric motor and a coil spring. The ejection force is wholly produced by the compressed coil spring and is transmitted to the piston in the blood chamber by a rod. This pump allows the ejection pressure, the beat rates, and the stroke volume all to be changed independently. The performance of the pump was tested by using a circulation model where the beat rate was adjusted from 30 to 250 bpm. The output subsequently increased from 0.81/min to 5.71/min and the stroke volume, from 20.4 ml to 36.7 ml. This new pump has been used for clinical cardiopulmonary bypasses in 24 patients of open heart surgery and the pressure traces during perfusion resembled those of the patients’ own hearts.

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Authors and Affiliations

  1. The Division of Surgery, Children’s Research Hospital, Kyoto Prefectural University of Medicine, Kyoto, Japan

    Yoshitaka Sasaki MD, Katsuhiko Nishiyama, Shogo Toda, Tukio Wada, Kazuhiro Kitaura, Shinichi Sato, Shuji Shirakata & Takahiro Oka

  2. The Department of Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamikyo-ku, 602, Kyoto, Japan

    Takahiro Kawai, Yuichiro Murayama, Masaharu Kadowaki, Yutaka Kanki, Takafumi Hashimoto & Koichi Oga

Authors
  1. Yoshitaka Sasaki MD
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  2. Takahiro Kawai
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  3. Katsuhiko Nishiyama
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  4. Yuichiro Murayama
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  5. Shogo Toda
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  6. Tukio Wada
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  7. Kazuhiro Kitaura
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  8. Shinichi Sato
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  9. Masaharu Kadowaki
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  10. Yutaka Kanki
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  11. Takafumi Hashimoto
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  12. Shuji Shirakata
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  13. Koichi Oga
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  14. Takahiro Oka
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Sasaki, Y., Kawai, T., Nishiyama, K. et al. A pulsatile pump for cardiopulmonary bypass and its clinical use. The Japanese Journal of Surgery 18, 487–493 (1988). https://doi.org/10.1007/BF02471480

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  • DOI: https://doi.org/10.1007/BF02471480

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