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Related Experiment Videos

Evaluation of a large-scale frozen blood program

I O Szymanski, E J Carrington

    Transfusion
    |September 1, 1977
    PubMed
    Summary

    This study evaluated previously frozen red blood cells, finding that specific glycerolization and dry heat thawing methods optimize recovery and safety. These frozen red blood cells maintained essential components and showed good in vivo survival for transfusions.

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    Area of Science:

    • Blood banking
    • Cryopreservation
    • Cellular recovery

    Background:

    • Large-scale cryopreservation of red blood cells (RBCs) is crucial for blood banking.
    • Optimizing freeze-thaw-wash recovery and ensuring safety are key challenges.

    Purpose of the Study:

    • To evaluate the characteristics of previously frozen RBCs prepared using the Red Cross method.
    • To assess the impact of modified glycerolization and thawing procedures on RBC recovery and safety.

    Main Methods:

    • Evaluation of RBC recovery using the original Red Cross method and modified glycerolization techniques.
    • Assessment of in vitro recovery with gradient glycerol addition.
    • Investigation of bacterial contamination risks associated with waterbath thawing.
    • Analysis of ATP and 2,3-DPG levels in frozen RBCs.
    • In vivo 24-hour survival studies.

    Main Results:

    • Original Red Cross method yielded ~91% freeze-thaw-wash recovery.
    • Modified glycerolization decreased recovery; gradient glycerol addition improved in vitro recovery.
    • Waterbath thawing poses a bacterial contamination risk; dry heat thawing is advisable.
    • Previously frozen RBCs maintained normal ATP and 2,3-DPG levels.
    • Therapeutic transfusions demonstrated acceptable 24-hour in vivo survival.

    Conclusions:

    • The Red Cross method for freezing RBCs is effective, with specific modifications enhancing recovery.
    • Dry heat thawing is recommended to prevent bacterial contamination.
    • Previously frozen RBCs retain critical biochemical properties and are suitable for transfusion.

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