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1998 Fiscal Year Final Research Report Summary

Investigation of the Control Logic in Circulatory System with Hybrid Total Artificial Circulation.

Research Project

Project/Area Number 08457346
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thoracic surgery
Research InstitutionThe University of Tokyo

Principal Investigator

ABE Yusuke  The University of Tokyo, Graduate School of Medicine, Instructor, 大学院・医学系研究科, 助手 (90193010)

Co-Investigator(Kenkyū-buntansha) IMACHI Kou  The University of Tokyo, Graduate School of Medicine, Professor, 大学院・医学系研究科, 教授 (10010076)
Project Period (FY) 1996 – 1998
KeywordsArtificial heart / Physiology / 1 / R control / Equation / Heart rate / Hybrid / Circulation / Control logic
Research Abstract

The control logic in circulatory system was investigated from the physiological control of total artificial heart named 1/R control. In order to analyze hemodynamic responses between natural heart and 1/R control at the same time, hybrid total artificial heart circulation was introduced in goat. In this system, cardiac output was completely controlled with artificial heart and the natural heartbeat could be monitored at the same time. The results showed that a discrepancy was often seen between the pulse rate of artificial heart and the heart rate in absolute value. This phenomenon was considered to be occurred by the absence of heart rate from feedback loop in controlling the cardiac output. Then, the relative changes in pulse rate and heart rate were extracted by using low cut filter and investigated. The response in relative change of pulse rate were quite similar to that of heart rate, indicating that the responses of 1/R control were the duplication of natural cardiac responses in normal daily activity. This result showed that the 1/R control equation described approximate control logic of heart. Further study should be focused to the investigation of control logic in circulatory system with exercise.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 阿部裕輔: "人工心臓の最適制御" 循環制御. 17・4. 523-530 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Abe,et al.: "1/f Fluctuation in Total Artificial Heart." Heart Replacement : Artificial Heart 5(Eds.T.Akutsu and H.Koyanagi.Springer-Verlag). 303-306 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿部裕輔、他: "完全人工心臓1/R制御による532日生存ヤギの長期血行動態と病態生理" 人工臓器. 26・1. 21-26 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Abe,et al.: "Over 500 Days Survival of a Total Artificial Heart Goat with 1/R Control" Heart Replacement : Artificial Heart 6(Eds.T.Akutsu and H.Koyanagi.Springer-Verlag). 34-40 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Abe,et al.: "Physiological Control of a Total Artificial Heart : Conductance-and Arterial Pressure-based Control" J.Appl.Physiol.84・3. 868-876 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿部裕輔、他: "完全人工心臓1/R制御の自然心拍変動による解析" 第37回日本エム・イー学会大会論文集. 36・特別号. 596-596 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿部裕輔、他: "ハイブリッド型人工心臓循環を用いた1/R制御による生体循環系グローバル制御ロジックの解明" 人工臓器. 27・4. S-100-S-100 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y Abe,et al.: "Analysis of 1/R Total Artificial Heart Control by Using Hybrid Artificial Heart" The International Journal of Artificial Organs. 21・10. 644-644 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿部裕輔: "自然循環と人工循環の生理" 計測と制御. (印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y Abe,et al: "Present Status of Total Artificial Heart in The University of Tokyo" Artificial Organs. (印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Abe, et al.: "1/f Fluctuation in Total Artificial Heart." Heart Replacement : Artificial Heart 5 (Eds.T.Akutsu and H.Koyanagi. Springer-Verlag). 303-306 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Abe, et al.: "Long-term hemodynamics and Patho-physiology in a total artificial heart goat survived for 532 days with 1/R control." Jap.J.Artif.Organs. 26 (1). 21-26 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Abe, et al.: "Over 500 Days Survival of a Total Artificial Heart Goat with 1/R Control" Heart Replacement : Artificial Heart 6 (Eds.T.Akutsu and H.Koyanagi. Springer-Verlag). 34-40 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Abe, et al.: "Physiological Control of a Total Artificial Heart : Conductance- and Arterial Pressure-based Control" J.Appl.Physiol.84 (3). 868-876 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Abe, et al.: "Analysis of 1/R Total Artificial Heart Control by Using Hybrid Artificial Heart" The International Journal of Artificial Organs. 21 (10). 644 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Abe, et al.: "Present Status of Total Artificial Heart in The University of Tokyo" Artificial Organs. (in Press).

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

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Published: 1999-12-08  

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