What Is a Nerve Conduction Velocity Test

A nerve conduction velocity test determines how rapidly a nerve conducts electricity. It's used to detect possible nerve injury. When a patient complains of discomfort, numbness, or muscular weakness, the test might assist in determining a diagnosis since a nerve may be unable to function properly. Nerve conduction velocity tests measure the speed of peripheral nerves.

To conduct the test, two electrodes are implanted on the skin along the nerve being examined. The first electrode transmits an electrical impulse or shock to activate the nerve, and the second electrode detects when it arrives. Knowing the distance between the two electrodes helps us to compute the speed.

What Illnesses Does a Nerve Conduction Velocity Test Show?

Nerve conduction investigations may be performed to identify a specific nerve damage, such as carpal tunnel syndrome. Other types of peripheral nerve injuries include sciatica and nerves squeezed by herniated discs in the neck and back.

Nerve conduction tests can also assist in detecting disorders that impact several nerves, such as Guillain-Barré syndrome, in which the immune system assaults the whole peripheral nerve system, resulting in widespread muscular paralysis. Nerve conduction investigations can detect a variety of additional causes of peripheral neuropathies (neuro=nerve + pathy=disease) that produce broad weakness and numbness. Diabetes, thyroid illness, alcoholism, cancer, autoimmune disorders, malnutrition, chemotherapy, and other conditions can all cause neuropathy. Nerve conduction velocity testing can also assist in identifying nerve damage caused by trauma.

Will a Nerve Conduction Velocity Test Indicate Neuropathy?

The nerve conduction test will show if the nerve being checked conducts electricity normally or whether the electrical signals are slower than expected. The test cannot diagnose itself. However, the information obtained by the test may aid the healthcare professional in the identification of a neuropathy if one exists.

Why Would Your Doctor Prescribe a Nerve Conduction Velocity Test? 

The nerve conduction velocity test can be performed to validate a suspected diagnosis or to measure the severity of nerve injury. The test results will assist in guiding treatment for the individual nerve condition.

What Is the Process For Measuring Nerve Conduction Velocity?

The nerve conduction study does not require hospitalization and can be done as an outpatient.

The region being tested must be unclothed. The neurologist will determine the location of the nerve(s) to be examined. The technician will apply a little quantity of gel to the skin and then implant two electrode patches along the nerve's course. The stimulating electrode transmits the electrical signal along the nerve, while the recording electrode receives it.

A small electric shock is delivered along the nerve, recorded, and the speed is examined using a monitor and computer. Depending on the circumstances, the nerve may be stimulated more than once, or other nerves may be evaluated. The test typically takes less than an hour to complete.

Is the Nerve Conduction Velocity Test Painful?

This test is not unpleasant, however, there may be some little discomfort when an electrical impulse is used to test the nerve. It is often regarded as more surprising than unpleasant.

What Do the Nerve Сonduction Velocity Test Findings Indicate?

The nerve conduction investigation is designed to identify whether a patient's complaint or physical finding is the result of aberrant nerve or muscle function. An aberrant nerve conduction study may aid in the identification of a range of diseases or injuries, or it may guide subsequent tests that aid in the diagnosis.

What Is the Normal Nerve Conduction Velocity Test?

The typical conduction speed of a peripheral nerve in the body is 50-60 meters per second (110-130 miles per hour). However, the usual speed of each nerve in the body varies significantly.