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Test Code A1R A1 Antigen Subtype, Blood

Reporting Name

A1 antigen subtype

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

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Whole Blood EDTA


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.


Specimen Minimum Volume

See Specimen Required

Specimen Stability Information

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

Reject Due To

Gross hemolysis OK

Reference Values

Reported as Negative or Positive

Day(s) Performed

Monday through Friday, Sunday

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

Secondary ID

113437

Clinical Information

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

Interpretation

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

Cautions

No significant cautionary statements

Clinical Reference

Fung MK, Eder AF, Spitalnik SL, Westhoff CM: Technical Manual. 19th ed. AABB; 2017

Method Description

Agglutination of red blood cells with an antiserum represents the presence of the corresponding antigen in the red blood cells.( MK, Eder AF, Spitalnik SL, Westhoff CM: Technical Manual. 19th ed. AABB; 2017)

Report Available

1 to 5 days

Specimen Retention Time

14 days

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.