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Test Code LAB8209 Blood Bank Special Antigen

Additional Codes

Test Name in EPIC EPIC Test Code Mnemonic
BLOOD BANK SPECIAL ANTIGEN LAB8209 BBSAG

 

Test Alias

BB Special Ag, Antigen, paternal

Useful For/Utility

Blood Bank Special Antigen test is used to perform specific antigen testing for the below instances:
1) When a clinically significant maternal antibody is identified, it is recommended the father be tested for the corresponding antigen(s) to determne the fetal risk for hemolytic disease of the fetus and newborn.
2) Life Source testing for A1 antigen.
3) Darzalex (Daratumumab) Order Set – included to order genotype or phenotype, whichever is indicated by testing results.

Methodology

Manual

Test Algorithm

LifeSource group A and AB patients will require an A1 type be performed on a pretransfusion sample.

Clinical Information

Detection of the presence or absence of a requested antigen on human red blood cells.   When a clinically significant maternal antibody has been identified, the liklihood of fetal involvement can be predicted by determining the genotype of the father. If the father does not possess the antigen, the fetus is not at risk. If the father is a heterzygote, there is a 50% chance that the fetus has inherited the antigen.

Specimen Requirements

Specimen Type: Whole blood

Container/Tube: Pink top (K2EDTA)-Lavender top (EDTA) is also acceptable.

Specimen Volume: 6 mL

Specimen Minimum Volume: 4 mL

Collection Instructions: Send specimen in original VACUTAINER.
Additional Information:

1. Antigen type needed is required. Common  antigen types include: c antigen, C antigen, e antigen, E antigen, Kell antigen, Fya antigen, Fyb antigen, Jka antigen, and Jkb antigen.

2. Label specimen appropriately (K2EDTA or EDTA blood).

Specimen Transport Temperature

Ambient/Refrigerate OK/Frozen NO

Day(s) Test Set Up

Upon request

Performing Laboratory

Essentia Health Laboratory-Transfusion Services

St. Joseph's Medical Center Lab

SMDC Clinical Lab, Virginia Hospital

Fargo Hospital Lab

Test Classification and CPT Coding

86905