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1993 Fiscal Year Final Research Report Summary

Toward an implantable Axial intra-Cardiac Blood Pump : The Valvo-pump

Research Project

Project/Area Number 04557061
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Thoracic surgery
Research InstitutionKeio University

Principal Investigator

YOZU Ryohei  Keio Univ.Sch.of Med.Assistant Prof., 医学部, 講師 (30129738)

Co-Investigator(Kenkyū-buntansha) ONOKUCHI Katsuhisa  Keio Univ.Sch.of Med.Resident., 医学部, 助手 (00214198)
ITO Tsutomu  Keio Univ.Sch.of Med.Resident., 医学部, 助手 (00232455)
MITAMURA Yoshinori  Hokkaido Tokai Univ, Sch.of Eng, Prof., 工学部, 教授 (70002110)
Project Period (FY) 1992 – 1993
KeywordsValvo-pump / Circulatory support / Axial flow pump / Artificial heart / Nonpulsatile flow / Blood pump / Assisted Circulation / Ferrofluidic seal
Research Abstract

We have developed the Valvo-Pump, an axial flow blood pump, which is implanted at the natural heart valve position. This device has several advantages ; it fits well anatomically, its blood-contacting surface is small because the left or right ventricular cavity is used as the blood storage reservoir, and it is implanted as easily as an artificial heart valve replacement. The Valvo-Pump consists of an impeller and a motor, both of which are encased in a housing. An impeller with 5 vanes (22.0mm in diameter) is connected to a samariumm-cobalt-rare earth magnet direct current (DC) brushless motor (21.3mm in diameter and 24.9-mm-long). Sealing is achieaved by means of aferrofruidic seal. A pump flow of 16.11/min was obtained at a pump differential pressure of 7.7 kPa (58mmHg), and a flow of 5.01/min at 18.4 kPa (318mmHg) with a motor speed of 8500 revolutions per min (rpm). Sealing was kept perfect against a pressure of 29.3 kPa (220mmHg) at 9000 rpm. The Valvo-Pump is a very promising and simple method of circulatory support.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 四津良平,三田村好矩 他: "新方式、人工心臓の開発 超小型血液ポンプ(Valvo-Pump)の心内埋め込み" 日本臨床. 49. 230-236 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 古梶清和,四津良平 他: "補助循環から置換外科へ 心臓移植、Valvo-Pumpへの補助人工心臓(VAS)" 人工臓器. 21. 52-58 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 四津良平 他: "遠心ポンプの臨床 補助循環に対する応用" 人工臓器. 21. 123-129 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山崎健一,四津良平 他: "心臓弁位置埋込型人工血液ポンプ(Valvo-Pump)の開発" 人工臓器. 21. 567-571 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kenichi Yamazaki,Ryohei Yozu,et al: "THOUGHTS AND PROGRESS:The Valvo-Pump,An Axial Blood Pump Implanted at the Heart Valve Position:Concept and Initial Results" Artificial Oragans. 16. 297-299 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Mitamura R.Yozu,et al: "TOWARD ANINTRA-CARDIAC AXIAL FLOW PUMP 開催地 三重" The First congress of the international society for Rotary Blood Pump. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Yozu,Y.Mitamura,et al: "Artificial Heart 4 Toward an Implantable Axial Intra-Cardiac Blood Pump:The Valvo-Pump p.267-272" Springer-Verlag,Tokyo T.Akutsu,H.Hoyanagi(Eds.), 424 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Mitamura, R.Yozu, et al: "Valvo-Pump" INFA INTERNATIONAL SCHOOL 1992 INTERNATIONAL SYNPOSIUM ON ROTARY BLOOD PUMP - THE 2ND GENERATION CARDIOPULMONARY BYPASS PUMP AND BEYOND (Houston TX). (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Mitamura, R.Yozu, et al: "Toward An Intra-Cardiac Axial Flow Pump." THE FIRST CONGRESS OF THE INTERNATIONAL SOCIETY FOR ROTABY BLOOD PUMPS. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.Yozu, Y.Mitamura, et al: "Artificial Heart 4 Toward an implantable axial intra-cardiac blood pump : The Valvo-Pump" Springer - Verlag, Tokyo T.Akutsu, H.Koyanagi (eds). 267-272 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kenichi Yamzaki, Ryohei Yozu, et al: "THOUGHTS AND PROGRESS The Valvo-Pump, An Axial Blood Pump Implanted at the Heart Valve Position : Concept and Initial Results" Artificial Organs. 16. 297-299 (1992)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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