Bronchial Lavage Fluid Alpha-1 Antitrypsin (A1AT) Concentration
This test measures the level of alpha-1 antitrypsin, a protein that helps protect your lungs from damage caused by enzymes released during inflammation. It may be used to assess lung health or inflammation in conditions like chronic obstructive pulmonary disease (COPD).
["This test helps evaluate lung function and inflammation by checking for abnormal levels of alpha-1 antitrypsin in lung fluid."]
Key facts at a glance
- LOINC
- 14557-3
- Short code
- M tb DNA Bronch Ql NAA+probe
- Synonyms
- M tb DNA Bronch Ql NAA+probe
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like persistent cough, shortness of breath, or lung-related conditions such as COPD, cystic fibrosis, or other inflammatory lung diseases. It can also be used to monitor lung function in certain genetic disorders or after lung injury.
What to Expect Before the Test
Bronchial lavage involves inserting a thin tube through your nose or mouth into your airways to collect fluid from your lungs. You may experience mild discomfort, but it is generally well-tolerated. Follow any specific instructions your provider gives you, such as avoiding certain medications or foods before the procedure.
What the Test Results Mean
Abnormally low levels of alpha-1 antitrypsin in lung fluid may indicate lung damage or inflammation. High levels could be related to certain genetic conditions or other underlying health issues. Your healthcare provider will discuss the results in the context of your overall health and symptoms.
Common Conditions Monitored or Diagnosed
This test can help diagnose or monitor conditions like alpha-1 antitrypsin deficiency, which can lead to lung diseases such as emphysema. It may also be used to assess lung inflammation in other respiratory conditions.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
A1AT in Bronchial Lavage Fluid
Frequently asked questions
What does a low level of alpha-1 antitrypsin in lung fluid mean?
How often will I need this test?
Can I eat or drink anything before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy