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HelpTest Code A1R A1 Antigen Subtype, Blood
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.
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 subtypeSpecimen Type
Whole Blood EDTASpecimen 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 |
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.
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.
Cautions
No significant cautionary statements
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)
Day(s) Performed
Monday through Friday, Sunday
Report Available
1 to 5 daysSpecimen Retention Time
14 daysPerforming 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 |