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I'm only a year out of MT school and now the blood bank supervisor at a small hospital. I was wondering what kind of testing you all do on donor blood. We receive our units from Lifeblood and currently do ABORH on all units and additional weak D testing on the negative units. Reading the technical manual I take it that we only need to be doing ABO on units labeled positive and ABORH on units labeled negative with no weak D testing. Is this common practice or do most still do the additional testing? Also, would it be acceptable to just change this procedure or is there more to it than that? THanks for your help.