Serum grouping is weak (<2) or missing reactions Perform patient history Add 2 additional drops of patient plasma/serum to the A1 and B cells Reactions are enhanced Reactions are not enhanced Perform a final clerical check and Add 4 drops of patient plasma/serum to record the results AC,O1,O2,A1 and B 30 mins, RT Record results 51
Reporting Interpret and report all resolved If the discrepancy is not resolved, the report discrepancies. should state “the ABO cannot be determined at this time”. Document all procedures(s) used to resolve The patient’s transfusion history should be the discrepancy updated with the blood group discrepancy for future testing Document all results obtained If it is necessary to contact another facility for a patient’s history, that facility must provide documentation of the information. Unresolved ABO and/or Rh grouping discrepancies must be reviewed by the Divisional Chief or designate. 52
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