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Test Code MISC2MAYOA1R A1 Antigen Subtype, Blood

Important Note

Miscellaneous Test


Shipping Instructions


Specimen must arrive within 7 days of collection



Specimen Required


Container/Tube: Pink top (EDTA)

Specimen Volume: 6 mL

Pediatric Volume: 2 mL blood in 6 mL pink-top (EDTA) tube

Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.


Secondary ID

113437

Useful For

Additional proof of alloantibody specificity

 

Assessment of solid organ transplantation donor compatibility

 

This test is not useful for the purpose of establishing paternity.

Method Name

Hemagglutination

Reporting Name

A1 antigen subtype

Specimen Type

Whole Blood EDTA

Specimen Minimum Volume

See Specimen Required

Specimen Stability Information

Specimen Type Temperature Time
Whole Blood EDTA Refrigerated (preferred) 7 days
  Ambient  72 hours

Reject Due To

Gross hemolysis OK

Clinical Information

The presence or absence of a cellular antigen is an inherited trait. Generally, individuals will not make antibody directed against an antigen present on their own red blood cells.

Reference Values

Reported as Negative or Positive

Interpretation

The A1 antigen type will be resulted as "pos," indicating that the antigen is present, or "neg," indicating that the antigen is absent.

Method Description

Agglutination of red blood cells with an antiserum represents the presence of the corresponding antigen in the red blood cells.(Cohn CS, Delaney M, Johnson ST, Katz LM, Schwartz J, eds. Technical Manual. 21st ed. AABB; 2023)

Day(s) Performed

Monday through Friday, Sunday

Report Available

1 to 5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

86905

LOINC Code Information

Test ID Test Order Name Order LOINC Value
A1R A1 antigen subtype 844-1

 

Result ID Test Result Name Result LOINC Value
A1R A1 antigen subtype 844-1