Skip to content

Peripheral Nerve Conduction Velocity (Radial Nerve)

Published: August 9, 2026Updated: August 16, 2026

This test measures how quickly electrical signals travel along the radial nerve, which runs from your arm to your hand. It helps diagnose nerve damage or disorders affecting nerve function.

Quick summary

["Assesses nerve health and potential nerve damage in your arm and hand."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
98615-8
Short code
Sensory NC velocity R radial n
Synonyms
Sensory NC velocity R radial n
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
nerve-conduction
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 order this test if you have symptoms like numbness, tingling, weakness, or pain in your arm or hand. It can also help evaluate conditions such as carpal tunnel syndrome, nerve compression, or other peripheral nerve disorders.

How the Test Works

Small electrodes are placed on your skin at specific points along the radial nerve. A mild electrical stimulus is applied to measure how fast the signal travels from one point to another. The test is usually quick and painless.

What to Expect Before the Test

No special preparation is needed, but you may be asked to remove jewelry or clothing covering the arm where the test will be done. Wear loose clothing for comfort.

What to Expect During the Test

You’ll lie down comfortably while electrodes are attached to your arm. You may feel a slight tingling or mild shock as the electrical signals are sent through your nerve. The process takes about 15–30 minutes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal results may indicate nerve damage, inflammation, or other conditions affecting nerve conduction. Low velocities could suggest conditions like diabetic neuropathy, nerve compression, or other peripheral neuropathies. High velocities alone are less commonly significant but may indicate demyelinating diseases or other rare conditions.

Short name

Radial Nerve Conduction Velocity

Frequently asked questions

How long does the test take?
The test itself typically takes about 15 to 30 minutes, depending on how many nerves are tested and any additional evaluations needed.
Is this test painful?
You may feel a mild tingling or slight discomfort from the electrical stimulation, but it is generally not painful. Most patients describe it as similar to a mild muscle twitch.
Can I eat or drink before this test?
No special diet or fasting is required for this test. You can eat and drink normally before your appointment.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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