NERVE CONDUCTION STUDIES

  • At Sydney Neurologist and Medical Specialists, we use nerve conduction studies for the evaluation of paresthesias (numbness, tingling, burning) and/or weakness of the arms and legs. Some of the common disorders we can diagnose or rule out by nerve conduction studies are:

  • Peripheral neuropathy

  • Carpal tunnel syndrome

  • Ulnar neuropathy

  • Guillain-Barré syndrome

  • Facioscapulohumeral muscular dystrophy

  • Spinal disc herniation

  • Charcot-Marie-Tooth disease

  • Sciatic nerve problems

What is a Nerve Conduction Study (NCS) and its clinical application?

Nerve conduction testing, also known as a nerve conduction study (NCS), is a diagnostic test that determines the extent of nerve damage. Commonly referred to as a nerve conduction velocity, this test measures the speed at which an electrical impulse travels through nerves. This test can differentiate nervous system complications from musculoskeletal issues. Additionally, nerve conduction testing can pinpoint the source of the damage and diagnose the cause.

What is the duration of a NCS?

Typically, a NCS takes approximately 30-60 minutes to complete. However, the duration may vary depending on the number of nerves and limbs that need to be evaluated. The specific requirements are determined by the referral question, the distribution of symptoms, and the obtained results.

When is a NCS necessary and how can it be obtained?

To undergo a NCS, a referral from a general practitioner (GP) or a specialist is required.

They would recommend a NCS if:

  • Numbness or tingling sensation occurs in specific areas of the hand.

  • There is a presence of burning, numbness, or tingling in the feet.

  • Weakness is experienced in an arm or leg.

  • Suspicions of muscle disease (myopathy) arise.

Once our staff have received the referral, we recommend contacting us to schedule an appointment.

Is any preparation necessary for a NCS?

It is advisable to wear loose clothing that can be easily rolled up, as most tests require access above the knee and elbow. If this is not feasible, a gown may be provided for the study.

It is important not to apply creams, moisturizers, or other skin care products before the test, as they can interfere with the electrodes and affect the reliability of the results.

Regular medications can still be taken, but it is essential to inform our staff in advance if you are currently using any blood-thinning medications such as Warfarin.

Fasting is not required, and you can consume meals and beverages as usual.

If you have a permanent pacemaker, deep brain stimulator, or any other implantable electronic devices, they will not be affected by the NCS.

However, please inform the doctor or technician conducting the test if you have any of these devices.

Pregnant women can undergo a NCS, but it is recommended that the potential benefits of the procedure be carefully considered by the referring doctor.

Please inform our staff if you are pregnant.

What occurs during a Nerve Conduction Study?

During a NCS, the integrity of your peripheral nerves, particularly in the arms and legs, is assessed by measuring the size and velocity of their electrical signals.

A small handheld stimulator delivers mild electrical impulses along the nerve being examined. Recording electrodes, placed strategically over the nerves and muscles, detect these impulses at a distance from the initial stimulation. While the impulses may cause slight discomfort, they are not painful and are akin to a brief static electricity shock.

In some cases, electromyography (EMG) may be necessary to complete the test.

Are there any complications associated with a Nerve Conduction Study?

There are no known complications associated with a Nerve Conduction Study (NCS).

Contact Us Today!

If you have any questions or comments, or if you want to learn more about the services we provide, please call us on 02 95252099