Which lab studies are performed in the evaluation of allergic transfusion reactions?

Updated: Jan 02, 2019
  • Author: S Gerald Sandler, MD, FACP, FCAP; Chief Editor: Emmanuel C Besa, MD  more...
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Answer

In allergic reactions, the presence of red plasma or urine, discordant pretransfusion and posttransfusion ABO blood types, or a positive antiglobulin (Coombs) test indicates other diagnoses in addition to an allergic reaction. Allergic transfusion reactions usually do not cause an increased number of eosinophils in subsequent white blood cell (WBC) differential counts.


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