• Transfusion · Nov 2013

    Multicenter Study

    Effect of storage of red blood cells on alloimmunization.

    • Saurabh Zalpuri, Henk Schonewille, Rutger Middelburg, Leo van de Watering, Karen de Vooght, James Zimring, Johanna G van der Bom, and Jaap Jan Zwaginga.
    • Center for Clinical Transfusion Research, Sanquin Blood Supply, Leiden, The Netherlands; Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands; Jon J. van Rood Center for Clinical Transfusion Research, Leiden University Medical Center, Leiden, The Netherlands; Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands; Blood Transfusion, Pediatric and Point of Care, Clinical Chemistry and Hematology Laboratory, University Medical Center Utrecht, Utrecht, The Netherlands; Puget Sound Blood Center Research Institute, Seattle, Washington.
    • Transfusion. 2013 Nov 1; 53 (11): 2795-800.

    BackgroundRed blood cells (RBCs) undergo changes during storage. Various studies have suggested a higher risk of adverse and often multifactorial clinical outcomes associated with older-stored RBCs. Our aim therefore was to examine if storage of transfused RBCs is also associated with the risk of RBC-specific alloantibody formation.Study Design And MethodsA two-center retrospective case-referent study was performed where case patients and control subjects were sampled from all consecutive patients who had received their first and subsequent RBC transfusions in one of the two centers only. Cases were defined as patients who developed a first RBC alloantibody. Control subjects were patients without detectable RBC alloantibodies, who were matched to the case patients regarding number of RBC transfusions. Binary logistic regression analysis was used to examine the association between storage time of RBCS and the occurrence of alloimmunization.ResultsA total of 144 cases and 286 controls were selected for our study, who had received a total 5478 RBC units. Comparing patients receiving units stored shorter than a certain number of days versus older units (with various storage periods up to 4 weeks) did not reveal an association or a trend between alloimmunization risk and storage time categories.ConclusionOur findings suggest that storage times of transfused RBCs between 1 and 4 weeks do not affect the risk of alloimmunization.© 2013 American Association of Blood Banks.

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