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[Change in erythrocyte sedimentation during compression and decompression].

O V Kostina, V N Krylov, G Ia Levin

    Aviakosmicheskaia I Ekologicheskaia Meditsina = Aerospace and Environmental Medicine
    |March 25, 2000
    PubMed
    Summary

    Compression and decompression of blood alters erythrocyte orientation, increasing sedimentation rate. Blood density also increases irreversibly after compression, suggesting potential gas microcavities within erythrocytes.

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    Area of Science:

    • Hematology
    • Biophysics

    Background:

    • Erythrocyte sedimentation is a fundamental hemorheological parameter.
    • Understanding blood's response to mechanical stress is crucial for transfusion and medical device applications.

    Purpose of the Study:

    • To investigate the effects of compression and decompression on erythrocyte sedimentation and blood density.
    • To explore the potential role of gas microcavities in altered blood properties.

    Main Methods:

    • Mechanical manipulation (compression/decompression) of blood and blood suspensions.
    • Observation of erythrocyte orientation and sedimentation rates.
    • Measurement of blood density changes in vitro.

    Main Results:

    • Erythrocytes in naturally sedimented blood adopt a near-vertical orientation during compression/decompression cycles.

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  • The sedimentation rate of erythrocytes significantly increases under these conditions.
  • Blood density exhibits an irreversible increase post-compression.

    • Conclusions:

    • Mechanical stress alters erythrocyte morphology and behavior, impacting sedimentation.
    • Irreversible density changes suggest physical alterations within the blood, possibly related to gas microcavities.
    • Further research is warranted to confirm the presence and function of erythrocyte-associated gas microcavities.