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Basic research concerning control method of bi-ventricular assist with nonpulsatile flow pump

Research Project

Project/Area Number 11557102
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Thoracic surgery
Research InstitutionNational Cardiovascular Center Research Institute

Principal Investigator

TAKANO Hisateru  National Cardiovascular Center Research Institute, Deputy, 副所長 (60028595)

Co-Investigator(Kenkyū-buntansha) NISHINAKA Tomohiro  National Cardiovascular Center Research Institute, Department of Artificial Organs, Laboratory Chief, 人工臓器部, 室長 (00256570)
TATSUMI Eisuke  National Cardiovascular Center Research Institute, Department of Artificial Organs, Laboratory Chief, 人工臓器部, 室長 (00216996)
TAENAKA Yoshiyuki  National Cardiovascular Center Research Institute, Department of Artificial Organs, Director, 人工臓器部, 部長 (00142183)
TSUKIYA Tomonori  National Cardiovascular Center Research Institute, Department of Artificial Organs, Staff, 人工臓器部, 室員 (00311449)
中村 真人  東京医科歯科大学, 助教授 (90301803)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥12,100,000 (Direct Cost: ¥12,100,000)
Fiscal Year 2001: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2000: ¥4,700,000 (Direct Cost: ¥4,700,000)
Fiscal Year 1999: ¥4,700,000 (Direct Cost: ¥4,700,000)
KeywordsArtificial heart / nonpulsatile flow pump / Continuous flow / biventricular support / Control / Motor Current / 両心補助循環 / 流量制御 / 脳 / 代謝 / 電流 / 心室細動
Research Abstract

Mechanical circulatory support is becoming an important therapeutic option both as a bridge to heart transplantation and for permanent use. Several types of nonpulsatile flow pumps are being developed for long-term circulatory support, having the advantage of compactness and low cost as compared to pulsatile pumps. The pathophysioloey of long-term nonpulsatile ventricular support, however, is not yet clearly understoocL The control method of continuous flow pumps especially in bi-ventncular assist with nonpulsatile flow pump has not been established. We have attempted basic research concerning control method of bi-ventricular assist with nonpulsatile flow pump. The hemodynamics under ventricular assist with continuous flow pump is quite particular including reduction in arterial pulsatility. We firstly evaluated physiological changes due to ventricular assist with the nonpusatile flow pump. We found that the diminution of systemic yasoconstrictive function and progression of cardiac parasympathetic nervous activity. However no obvious changes were not observed in central nervous system, baroreceptor function, hormonal factors, and pulmonary system. The control tactics for the optimized operation of a continuous-flow VAD using the driving motor current has been proposed. The good correlation between the motor current and flow rate allowed us to detect adverse pumping condition such as inflow cannulae sucking and even to estimate assist status by the VAD. The control of the continuous-flow pumps for biventricular support has also been examined. Maintenance of the circulatory balance between the left and the right pump was attempted by adjusting the hydrodynamic characteristics of the rignt pump. Use of additional resistance of the outflow tubing could successfully reduce the flow rate fluctuation caused by the change in circulatory resistance. The flow rate of the right pump was stabilized by this device.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] Tsukiya T., Taenaka Y., Nishinaka T.et al.: "Application of indirect flow rate measurement using motor driving with an integrated motor"Artificial Organs. 25. 692-696 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tsukiya T., Taenaka Y., Tatsumi E.et al.: "Performance of newly developed implantable centrifugal blood pump"ASAIO Journal. 47. 559-562 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T.et al.: "Change in vasoconstrictive function during prolonged non pulsatile left heart bypass"Artificial Organs. 25. 371-375 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T.et al.: "Effects of reduced pulse pressure to the cerebral metabolism during prolonged nonpulsatile left heart bypass"Artificial Organs. 24. 676-679 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T.et al.: "Cardiac autonomic nervous function during long-term nonpulsatile left heart bypass"Artificial Organs. 23. 500-503 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishimura T., Tatsumi E., Nishinaka T.et al.: "Prolonged nonpulsatile left heart bypass diminishes vascular comtractility"Int J Artif Organs. 22. 492-498 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishimura T., Tatsumi E., Nishinaka T. et al: "Prolonged nonpulsatile left heart bypass diminishes vascular comtractility"Int J Artif Organs. 22. 492-498 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T. et al: "Cardiac autonomic nervous function during long-term nonpulsatile left heart bypass"Artificial Organs. 23. 500-503 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T. et al: "Effects of reduced pulse pressure to the cerebral metabolism during prolonged nonpulsatile left heart bypass"Artifi Organs. 24. 676-679 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T. et al: "Change in vasoconstrictive function during prolonged non pulsatile left heart bypass"Artificial Organs. 25. 371-375 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tsukiya T., Taenaka Y., Tatsumi E. et al: "Performance of newly developed implantable centrifugal blood pump"ASAIO Journal. 47. 559-562 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tsukiya T., Taenaka Y., Nishinaka T. et al: "Application of indirect flow rate measurement using motor driving signals to a centrifugal blood pump with an integrated motor"Artif Organ. 25. 692-696 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tsukiya T., Taenaka Y., Nishinaka T.et al.: "Application of indirect flow rate measurement using motor driving signals to a centrifugal blood pump with an integrated motor"Artif Organs. 25・9. 692-696 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tsukiya T., Taenaka Y., Tatsumi E.et al.: "Performance of newly developed implantable centrifugal blood pump"ASAJO Journal. 47・5. 559-562 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T.et al.: "Change in vasoconstrictive function during prolonged non pulsatile left heart bypass"Artif Organs. 25・5. 371-375 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T.et al.: "Effects of reduced pulse pressure to the cerebral metabolism during prolonged nonpulsatile left heart bypass"Artif Organs. 24・9. 676-679 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nishinaka T., Tatsumi E., Nishimura T.et al.: "Cardiac autonomic nervous function during long-term nonpulsatile left heart bypass"Artif Organs. 23・6. 500-503 (1999)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nishimura T., Tatsumi B., Nishinaka T.et al.: "Prolonged nonpulsatile left heart bypass diminishes vascular comtractility"Int J Artif Organs. 22・7. 492-498 (1999)

    • Related Report
      2001 Annual Research Report
  • [Publications] 高野久輝 他: "体内植え込み型人工心臓開発の背景と現況"医科器械学. 69(7). 299-304 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nishinaka T, et al.: "Cardiac autonomic nervous function during long-term nonpulsatile left heart bypass."Artificial Organs. 23(6). 500-503 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nishinaka T, et al.: "Effects of reduced pulse pressure to the cerebral metabolism during prolonged nonpulsatile left heart bypass."Artificial Organs. 24(9). 676-679 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nishinaka T, et al.: "Effect of prolonged nonpulsatile left heart bypass on vascular control status."J Artif Organs. 3(1). 34-38 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nishinaka T, et al.: "Influence of pulsatile and nonpulsatile left heart bypass on the hormonal circadian rhythm."ASAIO Journal. 46(2). 582-586 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 高野久輝: "体内植え込み型人工心臓開発の背景と現況"医科器械学. 69(7). 299-304 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Nishinaka T: "The effect of prolonged nonpulsatile left heart bypass on vascular control status"Journal of Artificial Organs. (in press).

    • Related Report
      1999 Annual Research Report
  • [Publications] Nishinaka T: "Effects of long-term nonpulsatile left heart bypass on the mechanical properties of the aortic wall"ASAIO Journal. 45(5). 455-459 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Nishimura T: "Aortic reaction to prolonged nonpulsatile left heart bypass"J Artif Organs. 2. 141-145 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Nishinaka T: "Cardiac autonomic nervous function during long-term nonpulsatile left heart bypass"Artificial Organs. 23(6). 500-503 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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