A blood bank technologist needed to confirm the presence of anti-P1 in a patient specimen. Fresh cells were not available for use, so an old panel that contained cells positive for P1 was used. No cells positive for the antigen reacted at any phase of the antiglobulin test, whereas cells from the screening cells showed specificity for the presence of anti-P1. What is a possible explanation for this?
A) Technician omitted LISS
B) Patient expresses the p phenotype
C) P1 antigen deteriorates rapidly upon storage
D) Technician forgot to add AHG
Correct Answer:
Verified
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