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Mayo Clinic Laboratories

Test Code LAB274 Direct Antihuman Globulin Test (Coombs)

Important Note

If DAT is positive with polyspecific AHG, DAT's with anti-IgG and anti-C3b-C3d will be performed.

Specimen Requirement

6.0 mL EDTA Whole Blood - Pink top (Preferred)

4.0 mL EDTA Whole Blood - Purple top (Acceptable)

Specimen must be free of hemolysis.

Testing Schedule

Daily

Testing Department

Transfusion

Method

Test Method: Tube

CPT Code

86880

Alias

DAT

STAT Turnaround Time

3 hours

ASAP Turnaround Time

6 hours

Routine Turnaround Time

24 hours