The performance limits of acceptability required by CLIA for proficiency testing of participants are as follows: ABO grouping, 100%; Rh D typing, 100%; antibody detecting, 80%; antibody identifying, 80%; and crossmatching, 100%.
From 2005 to 2010, the most respondents reporting an ABO grouping result was 3793.
The test tube is the preferred ABO grouping method.
Among useful problems are identification of atypical red blood cell antibodies, unusual requests for blood components (or requests for unusual blood components), mismatched forward and reverse ABO groupings
, transfusion reaction workups, mislabeled pre-transfusion blood specimens, and nettlesome decisions regarding blood component inventory.