An Antibody Screen on a Patient with a Prior History

Multiple Choice

An antibody screen on a patient with a prior history of transfusion was negative. The crossmatch, performed at immediate spin and antihuman globulin, was incompatible with 1 unit selected. The next step in the investigation would be to:

A) perform a panel on the patient's serum.
B) perform a direct antiglobulin test on the incompatible unit.
C) redraw the patient and begin a new crossmatch.
D) crossmatch a new unit and discard the incompatible unit.