Working out MU for a Blood Group???

[Rashmi]

Further responses from UKTLC Colleagues:

Regarding how UoM might be determined for a test that produces truly qualitative results, it was discussed that antigen and antibody concentrations could possibly be used to apply UoM when close to the limits of detection.
The general feeling is that if internal controls are used, setting a limit at which the reaction strength is acceptable +/- one reaction grade is a good approach, and anything outside of this warrants investigation. We also think that when UKAS refer to UoM for transfusion tests, they in fact mean 'confidence', since there are so many stages in a transfusion test that lead to the end result.

Please also see link to a presentation from UKAS- has some useful info on working out Kleihauer MU.
https://www.ukneqash.org/download/543/UKNEQASHaematologyAnnualMeeting2019MsCarolStearn-MeasurementUncertainty