A1AT; A1-AT; α-1 Antitrypsin
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Alpha-1-Antitrypsin, Serum
Test ID: A1ATSM S
Test
Aliases/Synonyms
Method
Turbidimetric Immunoassay
Report Includes
Alpha 1 Antitrypsin
Specimens
Serum
Test Location
St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8
Test Version
15-Feb-2023
Specimen
Specimens
Serum
Collection Containers
Gold top (clot activator & gel)
Sample Volume
2 mL
Minimum Volume
1 mL
Collection & Handling
Handling Information
Separate as soon as possible. Store and send cold or frozen.
Stability
| Refrigerated | 7 days |
|---|---|
| Frozen | 60 days |
Additional Stability Information
Avoid freeze thaw cycles.
Test Version
15-Feb-2023
Performance / Interpretation
Method
Turbidimetric Immunoassay
Turnaround Time
2 days
Specimen Retention Time
7 days
Results
| Name | Units | Reference Range | Conversion Factor | |
|---|---|---|---|---|
| Alpha-1-Antitrypsin | g/L |
|
||
|
<0.8 - Alpha-1 antitrypsin deficiency likely. AAT phenotyping indicated if not previously tested.
0.8 - 1.0 - Alpha-1 antitrypsin deficiency shuold be considered. Suggest AAT phenotyping if not previously tested. 1.0 - 1.5 - Low-normal AAT does not completely exclude alpha-1 antitrypsin deficiency, especially if tested during an acute phase response. If CRP is elevated, and AAT deficiency is suspected, suggest re-testing when acute phase response has resolved. |
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Test Location
St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8
Test Version
15-Feb-2023
Interface / Setup
HL7 Interface Codes
| Order Code | Result Codes | Units |
|---|---|---|
| A1ATSM S | 64797Alpha 1 Antitrypsin | g/L |
Test Version
15-Feb-2023