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  • Title: Easier said than done: ABO compatibility and D matching in apheresis platelet transfusions.
    Author: Dunbar NM, Katus MC, Freeman CM, Szczepiorkowski ZM.
    Journal: Transfusion; 2015 Aug; 55(8):1882-8. PubMed ID: 25757728.
    Abstract:
    BACKGROUND: Many hospital transfusion services prioritize ABO plasma compatibility in platelet (PLT) transfusion to minimize risk for acute hemolytic transfusion reactions. In spite of the low risk of D alloimmunization associated with apheresis PLT transfusion, attempts may also be made to provide D- PLTs to D- patients. This study was undertaken to assess how often ABO compatibility and/or D matching occurs at our institution and how the ABO and D mix of our PLT supply impacts PLT selection. STUDY DESIGN AND METHODS: We retrospectively reviewed the ABO and D type of all PLTs transfused plus the age, sex, and ABO and D type of all PLT recipients between January 2010 and March 2014 (51 months). RESULTS: We provided ABO-identical PLTs for 5281 (54.6%), ABO plasma-compatible and cellular-incompatible for 3136 (32.4%), ABO low-titer plasma-incompatible and cellular-compatible for 1150 (11.9%), ABO plasma-incompatible and cellular-compatible for 30 (0.3%), and ABO plasma-incompatible and cellular-incompatible for 72 (0.7%). PLT supply did not match PLT demand based on patient ABO type, primarily due to a lower than expected supply of group O PLTs and higher than expected supply of group A and AB. D- patients were less likely to receive ABO-identical PLT transfusions (p = 0.0008), but were more likely to receive D- PLT transfusions (p < 0.0001). CONCLUSION: At our hospital, available inventory and PLT selection practices resulted in the majority of group O patients receiving cellular-incompatible PLT transfusions. Efforts to provide D- PLTs to D- patients also resulted in fewer D- patients receiving ABO-identical PLT transfusions.
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