Serum A-1-antitrypsin
What is this test for?
This test is prescribed when a doctor wants to detect an alpha-1-antitrypsin deficiency, a genetic condition that can lead to serious diseases such as pulmonary emphysema, even in people who have never smoked, or chronic liver diseases like cirrhosis.
When is it recommended?
Your doctor may prescribe this test if you have any of the following:
- Unexplained pulmonary obstruction (shortness of breath, persistent chronic cough)
- Chronic liver disease without an identified obvious cause
- Family history of alpha-1-antitrypsin deficiency
- Early emphysema appearing before age 45
- COPD symptoms in a non-smoker or light smoker
Results Interpretation
The results must be interpreted by a doctor, taking into account your overall clinical situation.
| Result | Indicative rate | Possible meaning |
|---|---|---|
| Normal | 0.9 – 2.0 g/L | Adequate protective rate |
| Bass | Less than 0.9 g/L | Possible genetic deficiency, liver failure, malnutrition |
| Raised | 2.0 g/L | Acute inflammatory reaction, active infection |
How do you prepare?
No special preparation is usually required for this test. It can be performed at any time of the day. Your doctor will inform you if specific precautions apply to your situation, especially if you are taking medication.
Where to get this test done in Quebec?
This laboratory test is available at Clinique Omicron service points in Quebec. A medical prescription is required. Our healthcare professionals can assist you with the prescription, performance, and interpretation of your results.
The content of this page is provided for informational purposes only and is not intended to replace the advice of a qualified healthcare professional. Consult a physician for any symptoms, questions or decisions you may have regarding your health.
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