Duffy (Fya/Fyb) Antigen Phenotype
| Label Mnemonic: | DUFFY |
| Epic code: | LAB9538 |
DeGowin Blood Center - Blood Bank
C271 GH
356-2561
C271 GH
356-2561
Specimen(s):
Blood
Collection Medium:
 | or |  | or |  |
| Pink top tube 6 mL (K2-EDTA) | Lavender top tube 3 mL (EDTA) | Lavender top tube 0.5 mL (EDTA) |
Minimum:
Adults (18 years and older): Full 6mL Pink top tube
Pediatrics (1 year through 17 years old): Full 3mL Lavender top tube
Pediatrics (4 months up to 1 year old): 1mL in a 3mL Lavender tube
Neonates (0 - < 4 months old): 0.5 mL in Lavender Microtainer®
If these age/container guidelines are not followed, it will result in a rejected sample and a new one will have to be collected.
Rejection Criteria:
Specimen must be labeled with patient’s first and last name and medical record number. Specimens will be rejected if information is not on the label when received.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around
Time:
24 hours upon receipt at reference laboratory (upon receipt in laboratory)
Reference Range:
Red cell antigens are tested with antisera to determine phenotype.
Methodology:
Tube test
CPT Code:
86905
Duffy antigen testing is useful to identify patients at risk for Duffy-Null Associated Neutrophil Count (DANC). Patients negative for both FyA and FyB are considered at risk for DANC.