28th May 2023

Following an acute reaction to red cell transfusion, a direct antiglobulin test (DAT) is performed

Following an acute reaction to red cell transfusion, a direct antiglobulin test (DAT) is performed on a blood sample taken from the patient. The result is positive.

What is the likely mechanism for the positive DAT?

Select the SINGLE most appropriate option from the list below. Select ONE option only.