Test Overview
To detect IgG immunoglobulin and/or complement adherence to red cells, as seen in immune hemolytic anemia or in a delayed hemolytic transfusion reaction. Positive tests will be further evaluated for bound and unbound antibody specificities associated with Cold Hemagglutinin Disease, Warm Autoimmune Hemolytic Anemia, and delayed reaction to transfusion. Positive tests will be further evaluated to determine the specific type(s) of protein adhering to the red cells and present in the serum (indirect test).
Negative
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Use of red top tubes or serum separator tubes may cause false positive reactions.
Test Details
1 - 72 hours
- Coombs Antibody
- Coombs Test
- IgG DAT
- C3 DAT
- DAT Study
- Direct Coombs`
Specimen Requirements
Collect specimens in two pink top tubes. Send intact specimens at room temperature. Specimens are unacceptable if collected in serum separator tube, contaminated, or grossly hemolyzed. Specimens sent for Blood Bank testing cannot be split for use by other laboratories.
Additional Information
If the DAT is positive at 1+ or less, additional antiglobulin testing and an antibody screen will be performed at an additional charge (for subsequent specimens on the same patient that are positive at 1+ or less, the antibody screen will not be performed). If the DAT is positive at 2+ or greater, monospecific testing and an eluate/absorption panel will be performed at an additional charge. If the antibody screen is positive, an RBC identification panel will be performed at an additional charge. Tests for drug directed antibodies performed following consultation. By ordering this test the clinician acknowledges that additional reflex testing will be performed and billed at a separate additional charge if indicated.