Test Overview
Method
Immunoturbidimetry
Result Included
Alpha 1 Antitrypsin
Aliases/Synonyms
A1AT; A1-AT; α-1 Antitrypsin
Specimen
Specimen Type
SerumContainers
Collection Containers
Gold top (clot activator & gel)
Volume
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 | Frozen |
|---|---|
| 7 days | 60 days |
Avoid freeze thaw cycles.
Performance & Interpretation
Turnaround Time
2 days
Specimen Retention Time
7 days
Results
Name
Units
Reference Range
Conversion
-
Alpha-1-Antitrypsing/L0.84 - 2.18
Comment
<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.
Referral Location
Canada
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| A1ATSM S | Alpha 1 Antitrypsin | 64797 | g/L |
Test Version
Last Updated
2023-02-15