Nerve Conduction Velocity (NCV) Test
Health Checkups
estimated about CNY 500-1000
(estimated about USD 75-150)
30 min
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Description
A nerve conduction velocity (NCV) test measures how quickly electrical signals travel through nerves to diagnose conditions like carpal tunnel syndrome or peripheral neuropathy, typically costing ¥500–¥1,000 in China; ChinaMedicalHub helps coordinate hospital appointments and interpreter support.
Main Uses
Nerve conduction velocity (NCV) tests are primarily used to: 1. Evaluate the function of the peripheral nervous system, 2. Diagnose and differentiate between types of peripheral neuropathies, 3. Assess the extent and location of nerve damage, 4. Monitor the progression or recovery from nerve injuries or diseases, 5. Guide treatment decisions in neurological disorders
Normal Range
The normal range for nerve conduction velocity (NCV) varies depending on the specific nerve being tested, but generally, it falls between 50-60 meters per second for motor nerves and 20-30 meters per second for sensory nerves. Latency (the time it takes for a signal to travel along the nerve) should be within 2-4 milliseconds for most upper limb nerves and 3-5 milliseconds for lower limb nerves.
Low Values - Possible Causes
Low NCV values can indicate: 1. Peripheral neuropathy, 2. Diabetic neuropathy, 3. Guillain-Barré syndrome, 4. Chronic inflammatory demyelinating polyneuropathy (CIDP), 5. Vitamin B12 deficiency
High Values - Possible Causes
High NCV values are less common and usually not reported as an issue; however, abnormally high readings might suggest: 1. Technical errors during testing, 2. Early stages of certain diseases before demyelination or axonal loss occurs, 3. Hyperthyroidism, 4. Certain hereditary conditions affecting myelin, 5. Recovery phase of some neuropathies where re-myelination is occurring
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