Importance of Getting a Sample for ABO Type Early in a Resuscitation
Testing for patient ABO type is important for two reasons. First, it allows the transfusion service to know which blood products are compatible with the circulating ABO isoagglutinins in the patient’s plasma. Second, it allows a switch in product support from “universal donor” products to ABO type-specific products. This is the most effective way to protect the community blood supply, particularly because more than 50% of patients will have a blood type other than O, and most patients are RhD positive. If a massive transfusion occurs before a sample is obtained for ABO type, it may be impossible to discern the patient’s native type. Further product support will entail risking the community supply of universal components in the effort to save the patient.
KeywordsPostpartum hemorrhage Uncrossmatched RBC ABO typing ABO discrepancy
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