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Nerve Conduction Velocity (NCV) Test
What is a nerve conduction velocity (NCV) test?
A nerve conduction velocity test (NCV) is an electrical test that is used to determine the adequacy of the conduction of the nerve impulse as it courses down a nerve. This test is used to detect signs of nerve injury.
In the nerve conduction velocity (NCV) test, the nerve is electrically stimulated by one electrode while other electrodes detect the electrical impulse "down stream" from the first electrode. The distance between electrodes and the time it takes for electrical impulses to travel between electrodes are used to calculate the speed of impulse transmission (the nerve conduction velocity, or NCV). A decreased speed of nerve conduction indicates nerve disease.
Why is the NCV used?
NCV is usually ordered in patients who are experiencing weakness or numbness in the arms or legs and can help determine the severity of a nerve injury. NCV is often combined with an Electromyelogram (EMG).
Is there any preparation for a NCV?
On the day of your test, we ask you to do the following:
- Wear loose-fitting clothing so we can easily test your arms, legs, etc.
- Avoid applying any lotion or oil to your skin.
- Do not wear jewelry such as bracelets, watches and rings.
- Tell the EMG doctor if you are taking medications such as aspirin, blood thinners or have a pacemaker
What can I expect after the test?
There may be some slight tenderness in some of the muscles that have been tested. This should last no longer than 24 hours. Applying ice over the affected area should help to alleviate any discomfort.
If you have any other questions with regard to your study please contact our office at 713-383-7100. For the Beaumont office, please call 409-767-8221.
