Direct Antihuman Globulin TesT
Detect in vivo coating of IgG and/or complement components on RBCs
Positive direct antiglobulin tests are associated with a variety of conditions which include hemolytic transfusion reaction, autoimmune hemolytic anemia, hemolytic disease of the fetus/newborn, and may be secondary to certain pathological conditions or drug therapy. Note: The presence of a positive direct antiglobulin test does not necessarily correlate with a pathological condition.
Lavender-top (EDTA) tube or yellow-top (ACD) tube
Specimens should be tested as soon as possible or within 72 hours of collection. Samples that cannot be tested immediately should be stored at 2°C to 8°C. Do not freeze.
Gross hemolysis; bacterial or other contamination; specimen more than five days old