Antigen Phenotype Fya

Clinical information

Diagnostic Utility:

This test is used to determine the presence or absence of the Fy^a antigen on red blood cells. It is part of the study of the erythrocyte phenotype. It is also useful in the context of studying the specificity of irregular antibodies to demonstrate that in the presence of an anti-Fy^a specificity, the individual who has developed the antibody is Fy^a negative.

Method:                                            

Hemagglutination.

Reference Values

Possible results are: Negative, Positive.
In cases where the result is doubtful, due to previous transfusions or because the sample has a positive direct antiglobulin test, the same is reported and the need for additional studies to unequivocally categorize the Fy^a phenotype is indicated.

Diagnostic Algorithm:

Not applicable.

Turnaround Time:

1 day.

Specimen information

Sample: Whole blood
Tube: EDTA K3 10 ml tube
Minimum volume: 6 ml
Stability:

• At room temperature: 2 days
• In refrigeration: 2 days

Transport instructions: Preferably at room temperature
Rejection reason: Highly hemolyzed sample

Administrative information

BST Code: 0520
Test Description: Antigen Fy^a phenotype
Synonyms: Ag Fy^a
Section: Immunohematology
BST Rate: Check the updated rates here.

Profiles:

Test 0520 Antigen Fy^a phenotype is performed within the following profiles:

References

AABB Technical Manual. 19th edition. Editat per MK Fung, AF Eder, SL Spitalnik, CM Westhoff: AABB 2017