A standard follow-up to antibody identification is antigen phenotyping.
Phenotype the following:
- Patient's red cells (expecting them to lack the corresponding antigen)
- Donor red cells (in this case, those transfused before an antibody was identified or, more typically, to find suitable antigen-negative donors to crossmatch before transfusion)
If you had wanted to type the patient for any antigens at this point in the investigation (2 weeks post-transfusion), which specimen would you have used?
Consider possible antigen typing problems and how to overcome them before proceeding to the next page.
