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Rheology of bovine bone marrow.

J D Bryant, T David, P H Gaskell

    Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
    |January 1, 1989
    PubMed
    Summary
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    Bovine bone marrow viscosity differs significantly between proximal and distal sites. Proximal marrow solidifies below 30°C, while distal marrow remains liquid below 20°C, impacting its flow properties.

    Area of Science:

    • Biophysics
    • Materials Science
    • Veterinary Medicine

    Background:

    • Bone marrow viscosity is crucial for understanding skeletal biomechanics and marrow function.
    • Variations in bone marrow properties can influence physiological and pathological processes.

    Purpose of the Study:

    • To investigate the rheological properties of bovine bone marrow.
    • To determine the influence of temperature and anatomical site on bone marrow viscosity.

    Main Methods:

    • Viscosity measurements were performed on bovine bone marrow samples from proximal and distal radii.
    • Experiments were conducted across a range of temperatures and shear rates.

    Main Results:

    • Bone marrow viscosity was independent of shear rate and temperature above critical thresholds (37°C distal, 42°C proximal).

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  • Above these temperatures, viscosity stabilized at a lower limit of 0.04 Pas.
  • Significant viscosity differences were observed below critical temperatures: proximal marrow was 10-15 times more viscous than distal marrow.
  • Proximal marrow solidified below 30°C, while distal marrow remained liquid until below 20°C.

    • Conclusions:

    • Bovine bone marrow exhibits distinct temperature-dependent rheological behaviors based on anatomical location.
    • Proximal bone marrow possesses a higher viscosity and solidifies at higher temperatures compared to distal marrow.
    • These findings have implications for understanding bone marrow transport phenomena and mechanical properties.