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Valvo-Pump : Axial Blood Pump Implanted at the Heart Valve Position

Research Project

Project/Area Number 01870061
Research Category

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

Allocation TypeSingle-year Grants
Research Field Thoracic surgery
Research InstitutionKeio Univ.

Principal Investigator

YOZU Ryohei  Keio Univ. Dept. of Surg., Staff Surgeon, 医学部, 助手 (30129738)

Co-Investigator(Kenkyū-buntansha) MITAMURA Y  Hokkaido Tokai Univ., Dept. of Eng., Prof., 工学部電子情報工学部, 教授 (70002110)
KOKAJI K  Keio Univ. Dept of Surg., Staff Surgeon, 医学部, 助手 (20186638)
SOMA Y  Keio Univ. Dept of Surg., Staff Surgeon, 医学部, 講師 (40051437)
鈴木 孝明  慶應義塾大学, 医学部, 助手 (10196834)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1990: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1989: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsValvo-Pump / Artificial Heart / Nonpulsatile blood Pump / Axial flow Pump / Nonpulsatile Flow / Heart Valve / Heart Replacement / Implantable Artificial Heart / Axial flow Pump / Non pulsatile flow / Heart valve / Implantable Antificial Heart / 人工循環 / Valvo-pump / 軸流ポンプ / 人工心臓 / 補助人工心臓 / 定常流血液ポンプ / 遠心ポンプ / 無拍動流血液ポンプ
Research Abstract

The Valvo-Pump, axial nonpulsatile blood pump implanted at the heart valve position preserving the diseased heart muscle, has several advantages over artificial heart replacement. They are (a) good anatomical fitting to the natural heart, (b) less blood contacting surface, and (c) easy implantation technique as heart valve replacement. Feasibility of the concept of the Valvo-Pump was studied.
The housing of the prototypical pump is a straight tube of 37 mm in diameter and 33 mm in length. Within the housing an impeller with 10 vanes is located. The impeller is connected to a samarium cobalt rare earth magnet DC brushless motor measuring 23.8 mm in diameter and 30.2 mm in length. Sealing is achieved by means of Teflon seal. A guiding wheel with four vanes is located behind the impeller.
Pump was studied on a hydraulic mock circulation system to evaluate its performance characteristics. Pump flow of 5 l/min was obtained for the pump differential pressure of 90 mmHg at 4800 rpm, and 15 l/min for 70 mmHg at 4900 rpm.
The Valvo-Pump will be feasible by developing a small high output power motor and an enduable seal and also by optimizing impeller design.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 四津 良平: "新方式,人工心臓の開発.ー超小型血液ポンプの心内埋め込みー" 日本臨床. 49. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Mitamura Y.,Yozu R.,Tanaka T.: "ValvoーPump:Axial nonpulsatile blood Pump implanted at the heart Valve position" Artificial Heart 3 SpringerーVerlarg. 3. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] R.Yozu,Y.Mitamura,T.Tanaka,K.Yamazaki: "Toward a Totally Implantable Artificial Heart:Axial Nonpulsatile Blood Pump Implanted at the Heart Valve Position (ValveーPump)" ASAIO. 37. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Mitamura Y, Yozu R, Tanaka T: "Valvo-Pump : Axial nonpulsatile blood pump implanted at the heart valve position." Artificial Heart. 3. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 四津 良平: "新方式,人工心臓の開発ー超小型血液ポンプの心内埋め込みー" 日本臨床. 49. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Mitamura,Y,Yozu R,Tanaka T,: "ValvoーPump:Axial nonpulsatile blood pump implanted at the heart valve position." Artificial Heart 3 springerーVerlarg. 3. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] R.Yozu,Y.Mitamura,T.Tanaka.K,Yamazaki: "Toward a Totlly Implantable Artificial Heart:Axial Nonpulsatile Blood Pump Implanted at the Heart Valve Position (ValvoーPump)" ASAIO.37. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yoshinori Mitamura: "Valvo-Pump:Axial nonpulsatile blood pump implanted at the heart valve position" Artifical Heart 3-Springer-Verlag Tokyo. (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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