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Laboratory: Clinical Immunology
Test Name:
ALPHA-1-ANTITRYPSIN - (S)
Test Code: AATD
Clinical Information:
Alternate Name(s): Prolastin, AAT (Alpha-1-Antitrypsin), A1-Antitrypsin, A1A, Anti-Alpha-1-Trypsin

Measurement of alpha1-antitrypsin aids in the diagnosis of juvenile and adult cirrhosis of the liver.  Alpha1-antitrypsin deficiency has been associated with neonatal respiratory distress syndrome, severe protein-losing disorders, and pulmonary emphysema.
 
Values should be used in conjunction with other laboratory and clinical findings.
 
Collection Devices:
Specimen Required:
Serum: 1.0 mL

Refrigerated: 14 days
Frozen: 30 days
Referral:
Serum: 1.0 mL

Shipping & Storage: Separate serum and ship refrigerated.

Testing Laboratory (MB): Health Sciences Centre Immunology Laboratory
Requisition:
Reference Values:
Adult 19+: 0.90 – 2.00 g/L
 
Adult reference values adopted from Binding Site, Optilite Alpha-1-Antitrypsin Kit, INS034.OPT, ver 30th September 2020.
 
Reference values have not been established for patients that are less than 19 years of age. 

Method of Analysis: Turbidimetry – Binding Site Optilite
 
Availability:
Within 1 Week
See Also:
More Information:
If sample requirements are met, patients with quantitative results below 0.900 g/L will be sent to In-Common Laboratories for Proteotype testing.  If the mass spectrometry proteotype and quantitative serum levels are discordant, phenotyping will be added and reported.

Reportable Range: 0.35 – 5.00 g/L
 
High levels of alpha-1-antitrypsin may be present in patients with acute inflammation.