A direct antiglobulin test is ordered on a patient sample.This test detects:

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A direct antiglobulin test (DAT) is also known as a direct Coombs test and is used to identify if antibodies are coating red blood cells in vivo. The test detects the presence of immunoglobulin G (IgG) or complement components bound to the surface of red blood cells. This can indicate the presence of autoimmune hemolytic anemia or a transfusion reaction. The other choices (B, C, and D) are not related to the purpose of the direct antiglobulin test.

A Direct Antiglobulin Test Is Ordered on a Patient Sample