Respiratory Viral RNA (Lower Respiratory Tract) Qualitative Probe
This test checks for the presence of viruses in a sample taken from your lower respiratory tract, such as sputum or induced sputum, to help diagnose infections like respiratory syncytial virus (RSV), influenza, or other viruses.
["This test helps identify viral infections in your lungs or airways that may require treatment or further medical evaluation."]
Key facts at a glance
- LOINC
- 88595-4
- Short code
- RSV A RNA Lower resp Ql NAA+probe
- Synonyms
- RSV A RNA Lower resp 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
What This Test Measures
The test detects genetic material (RNA) from specific viruses that cause lower respiratory infections. It does not measure virus levels or severity but confirms whether a virus is present in your sample.
How the Test Works
A healthcare provider will collect a sample (e.g., sputum or induced sputum) from your respiratory tract. The sample is then analyzed using a molecular probe to identify viral RNA. This method is highly sensitive for detecting viruses.
When You Might Need This Test
You may need this test if you have symptoms like coughing, difficulty breathing, or fever and your doctor suspects a viral infection in your lungs or airways. It is often used in patients with respiratory conditions or those at higher risk of infections.
What to Expect Before the Test
No special preparation is needed, but you may be asked to rinse your mouth with water before the test to avoid contamination. If the sample is collected via sputum induction, you might be instructed to drink fluids and cough deeply to produce a sample.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test plays a critical role in diagnosing viral lower respiratory infections, guiding treatment decisions, and monitoring the effectiveness of interventions. Accurate identification of the virus can help differentiate between viral and bacterial infections, ensuring appropriate care.
Short name
Viral RNA Test (LRT)
Frequently asked questions
Why might my doctor order this test?
How long does it take to get results?
Can I take anything before or after the 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