Brachial Plexus Neurochemistry Profile (Screening)
This test measures certain substances in your blood that may help assess nerve function in the brachial plexus, a network of nerves connecting the arm to the spinal cord. It is often used to evaluate potential nerve damage or dysfunction.
["This screening helps identify possible nerve-related issues in your arm’s nerve network."]
Key facts at a glance
- LOINC
- 24582-9
- Short code
- MR Brachial plexus
- Synonyms
- MR Brachial plexus
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 44
- Ref high
- 147
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- mr
- CPT
- 84075
- SNOMED
- 27550007
- 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 Is Done
Your doctor may recommend this test if you’ve experienced symptoms like numbness, tingling, weakness, or pain in your arm or hand, or if you’ve had trauma (such as a fall or injury) to the neck or shoulder region that could affect the brachial plexus nerves.
What to Expect Before the Test
You’ll typically have a simple blood draw from a vein in your arm. The process is quick and usually painless. No special preparation is needed, but fasting may be advised depending on the specific tests included.
What the Test Measures
This screening evaluates the presence of specific biomarkers (such as neurotransmitters, metabolites, or proteins) that can indicate nerve health or dysfunction in the brachial plexus. Results help determine if further evaluation or treatment is needed.
Possible Results and Next Steps
If your results are abnormal, your doctor may order additional tests (like nerve conduction studies) or recommend treatments tailored to your symptoms, such as physical therapy or medications.
Reference range
Adult: 44-147 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Brachial Plexus Screening
Frequently asked questions
What does an abnormal result mean?
Can this test detect all brachial plexus issues?
How soon will I get results?
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