EDTA glycine acid treatment of red blood cells
Kosanke, J.
Immunohematology 28(3): 95-96
2012
ISSN/ISBN: 0894-203X PMID: 23286556 Document Number: 659621
IgG dissociation is necessary when a sample is direct antiglobulin test (DAT) positive and antigen testing using blood grouping serum reactive by the antiglobulin test is performed. Exposure of IgG-coated red blood cells (RCBs) to a low pH of 3.0 with EDTA glycine acid successfully dissociates the IgG, rendering the RCBs DAT negative 82 to 85 percent of the time. The procedure takes one minute or less and leaves RBC antigens intact and able to be typed except for those antigens in the Kell blood group system and for the high-prevalence antigen Er(a).