What is an NCV Test?

Nerve Conduction Studies
NCVs test how well signals travel along a nerve and can help find the cause of abnormal nerve function. Signals are made to travel along the nerve by applying small electric pulses to the nerve at one site and recording the response at a different place along the nerve. The small electric pulses cause a short, mild tingling feeling. The nerve's response is picked up by a recording instrument and then is measured by the physician or technologist performing the test. Several nerves may need to be tested depending on the type of problem.

Special Precautions
You should inform the physician prior to the examination if:

1. You are on blood thinners or have hemophilia.2. The physician should also be informed if you have a cardiac pacemaker.3. Transcutaneous electrical nerve stimulator (TENS) unit.4. Dorsal Column Stimulator (Spinal Cord Stimulator).5. Avoid using skin lotions the day of the test.6. If you have myasthenia gravis you should ask your physician whether or not to take medications, such as Mestinon, before the examination.

Results
When the examination is completed, the technician will analyze the results and report them to the physician who referred you for the tests. Your referring physician will use the test results to help decide on proper management.

Patient Questions
This document is not a substitute for an informed discussion between a patient and his or her physician about the examination.

If you have questions, they will be answered at the time of your examination.