Nerve Conduction Velocity (NCV) with Waveform Latency Measurement
This test measures how quickly electrical signals travel along your nerves, focusing on the time it takes for signals to reach different points (waveform latency). It helps diagnose nerve damage or disorders like neuropathy or peripheral nerve issues.
["This test assesses nerve function and can help identify problems that may cause tingling, weakness, or pain."]
Key facts at a glance
- LOINC
- 98705-7
- Short code
- Min F-wave latency Time Nerve
- Synonyms
- Min F-wave latency Time Nerve
- 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 Is This Test Done?
Your doctor may recommend this test if you have symptoms like numbness, tingling, muscle weakness, or pain in your arms or legs. It can also be used to monitor nerve function before or after treatments for nerve-related conditions.
What Does the Test Involve?
You’ll lie down on an exam table while electrodes are placed on your skin at specific nerve sites. A mild electric current is passed through these electrodes to stimulate nerves, and the time it takes for the signal to travel is measured. This process is usually painless and quick.
How Is the Test Performed?
The test involves gentle stimulation of nerves in your arms or legs using electrodes. Sensors detect the electrical response, and the speed of signal travel is recorded. Multiple measurements are taken to create an accurate profile of nerve function.
What Are Common Symptoms to Watch For?
Common symptoms that may prompt this test include persistent tingling, burning sensations, muscle weakness, or loss of sensation in parts of your body. These could indicate nerve damage or dysfunction.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
NCV Latency Test
Frequently asked questions
Your doctor may ask, 'What does a nerve conduction velocity test tell me about my health?'
Your doctor may ask, 'How often should I get this test?'
Your doctor may ask, 'What are the risks or side effects of 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