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Red Cell Rheology in Pulsative Flow

Research Project

Project/Area Number 61480100
Research Category

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

Allocation TypeSingle-year Grants
Research Field General physiology
Research InstitutionEhime University

Principal Investigator

SHIGA Takeshi  Ehime University, Professor, 医学部, 教授 (10028350)

Co-Investigator(Kenkyū-buntansha) KON Kazunori  Ehime University, Lecturer, 医学部, 講師 (40093926)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1987: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1986: ¥2,700,000 (Direct Cost: ¥2,700,000)
KeywordsPulsative Flow / Erythrocytes / Deformation / Blood Flow / 圧力汲伝播
Research Abstract

The flow properties of red cells affect the rheological characteristics of circulating blood. However, a little is known about red cell behavior under the pulsative shear flow which is physiological circumstance in arteries. Therefore, we studied the red cell rheology in pulsative flow with a rheoscope and a pulsative flow system built in our laboratory.
(1) To reveal the response of red cell deformation to a rapid change in shear stress, the time-dependent process of red cell deformation in a diluted suspension was observed with a rheoscope. Shear stress was modulated sinusoidally. At a modulation frequency of above 2Hz, the retarded response was detected in the up-phase of the sinusoidally modulated shear stress. The response was affected by (i) intracellular viscosity, (ii) membrane stiffness, and (iii) intracellular calcium content.
(2) The effect of hematocrit on red cell deformation in pulsative shear flow was studied with the pulsative shear flow system controlled by a computer. (i) The enhancement of deformation was detected with increasing hematocrit. (ii) The time dependent red cell deformation showed that shape recovery to biconcave shape in the down phase of pulsative shear stress was retarded at high hematocrit.
(3) The effect of red cell deformation on the pressure-flow relationship of pulsative flow was studied with the pulsative flow system equipped with a rigid tube of 250 um in diameter. Lateral pressure was measured at two points along the tube with pressure transducers to measure the efficiency of pressure transmission between the two points. It was revealed that suspension viscosity, but not red cell deformability, affected the efficiency of the pressure transmission.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] K. Kon;J. Murakami;M. Okazaki and T. Shiga: Japanese Journal of Physiology. 37. 337-340 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K. Kon;N. Maeda and T. Shiga: Blood. 69. 727-734 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K. Kon;J. Murakami and T. Shiga: Biorheology. 24. 530-530 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K. Kon;J. Murakami;K. Takaoka and T. Shiga: Biorheology. in press. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K. Kon;J. Murakami;M. Okazake and T. Shiga: Microcirulation annual. 1987. 129-130 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M. Tsuchiya and M. Asano (ed. );K. Kon;J. Murakami and T. Shiga: "Microcirculation-an update" Elsevier Science Publishers, 792(2) (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Seguchi and K. Hayashi (ed. );K. Kon;J. Murakami and T. Shiga: "Biomechanics in Japan, USA and China" Mita Press, (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kon, J.Murakami, M.Okazaki and T.Shiga: "A novel method for measuring the erythrocyte deformability under oscillatory stress." Japanese Journal of Physiology. 37. 337-340 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kon, N.Maeda and T.Shiga: "Erythrocyte deformation in shear flow: Influences of internal viscosity, membrane stiffness, and hematocrit." Blood. 69. 727-734 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kon, J.Murakami and T.Shiga: "Erythrocyte behavior in pulsative flow." Biorheology. 24. 530-530 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kon, J.Murakami, K.Takaoka and T.Shiga: "Oscillatory deformation of human erythrocyte in sinusoidally modulated shear flow." Biorheology. in press. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kon, J.Murakami, M,Okazaki and T.Shiga: "Erythrocyte deformation under oscillatory shear stress." Microcirculation annual. 1987. 129-130 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kon,J.Murakami and T.Shiga: M.Tsuchiya and M.Asano (ed.) Elsevier Science Publishers. Microcirculation - an update, (2) 792 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kon, J.Murakami and T.Shiga: Y.Seguchi and K.Hayashi (ed.) Mita Press. Biomechanics in Japan, USA and China, (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 昆和典,村上順子,前田信治,志賀健: 第38回日本生理学会中国四国地方会(予稿集). 38. 19-19 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 昆和典,村上順子,谷口拓也,近藤圭一,志賀健: 第9回生体膜と薬物の相互作用シンポジウム(予稿集). 9. 97-98 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 昆和典,村上順子,岡崎正治,志賀健: 第12回日本微小循環学会総会(予稿集). 12. 26-26 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 昆和典: 第10回日本バイオレオロジー学会.

    • Related Report
      1986 Annual Research Report
  • [Publications] Kon,K.;Murakami,J.;Shiga,T.: Fourth World Congress for Microcirculation.

    • Related Report
      1986 Annual Research Report
  • [Publications] Kon,K.;Murakami,J.;Okazaki,M.;Shiga,T.: Japanese Journal of Physiology.

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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