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Morphological determinants of red cell deformability

H J Meiselman

    Scandinavian Journal of Clinical and Laboratory Investigation. Supplementum
    |January 1, 1981
    PubMed
    Summary
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    Cellular shape significantly impacts red blood cell (RBC) deformability. Altered RBC morphology, like echinocytes or stomatocytes, increases deformability, a crucial factor in blood flow dynamics.

    Area of Science:

    • Biophysics
    • Hematology
    • Cellular Mechanics

    Background:

    • Red blood cell (RBC) rheology is vital for microcirculation.
    • Cellular morphology is a known factor influencing RBC behavior.
    • Understanding RBC deformability is key to diagnosing blood disorders.

    Purpose of the Study:

    • To investigate the impact of cellular morphology on human RBC rheological behavior.
    • To compare fresh and ATP-depleted erythrocytes regarding morphology and rheology.
    • To elucidate the role of shape alterations in RBC deformability.

    Main Methods:

    • Macrorheological measurements using a cone-plate viscometer.
    • Microrheological analysis including high-speed centrifugation for cell deformation.
    • Direct microscopic observation via a counter-rotating rheoscope.

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    Main Results:

    • RBC shape is a critical determinant of RBC deformability.
    • Echinocytic and stomatocytic shape changes enhance RBC deformability.
    • Morphology effects on deformability are shear-stress dependent.

    Conclusions:

    • Cellular morphology is a significant factor influencing RBC response to deforming forces.
    • RBC deformability assessment requires consideration of shape, S/V ratio, and material properties.
    • High shear stress conditions may mask morphology-dependent changes in RBC deformability.