Alex1221 Posted August 7, 2019 Share Posted August 7, 2019 When performing Lot Verification on Blood Bank reagents, what is the lowest agglutination strength deemed acceptable when establishing acceptance criteria for a new lot? We are leaning on 2+ or greater. Alex Link to comment Share on other sites More sharing options...
AMcCord Posted August 8, 2019 Share Posted August 8, 2019 Before you set a specific number across the board, I would suggest that you check you package inserts. Some of the human source rare antisera have positive agglutination defined as 2+ or greater and don't usually give much stronger reactions. The monoclonal rare antisera usually seems to react 3-4+. I would also expect stronger reactivity for anti-A or anti-B, depending on what you are testing them against. I would see 2+ reactivity for them as an indication that the reagent is not OK. We look for reactivity consistent w/ previous lots - +/- one grade of agglutination. David Saikin and Yanxia 2 Link to comment Share on other sites More sharing options...
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