HIV RNA Viral Load (Qualitative Nucleic Acid Amplification Test, CSF)
This test detects the amount of HIV genetic material (RNA) in your cerebrospinal fluid (CSF) using a specialized probe to help monitor HIV progression in the central nervous system.
["It helps track how well your treatment is working to control HIV in your brain and spinal cord."]
Key facts at a glance
- LOINC
- 50624-6
- Short code
- HIV 1 RNA Pnl CSF NAA+probe
- Synonyms
- HIV 1 RNA Pnl CSF NAA+probe
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- CPT
- 86701
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your doctor may order this test if you have symptoms like headaches, confusion, or neurological issues that could be linked to HIV affecting your brain. It’s also used in research or specialized care for HIV-related neurological conditions.
How the Test Works
A small sample of your CSF is taken through a procedure called a lumbar puncture (spinal tap). The lab then uses a probe-based test to check for HIV RNA, which helps identify if the virus is present in your brain’s fluid.
What to Expect Before the Test
You’ll likely need to fast or avoid certain medications for a few hours before the test. Your doctor will explain the procedure and any risks, such as mild headache or soreness at the injection site.
What to Expect During the Test
The test involves lying on your stomach and having a needle inserted into your lower back to collect CSF. It usually takes a few minutes, and you may feel pressure or a slight sting. You’ll be given pain relief if needed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
HIV RNA CSF Probe
Frequently asked questions
This test is primarily used in research or specialized care settings to assess HIV activity in the central nervous system, though it’s not a standard part of routine HIV management. It may help doctors evaluate if HIV is causing neurological symptoms or if treatment adjustments are needed for your brain health.
What does a positive result mean?
How often should I get 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