Electrodiagnostic Testing

    Why did your doctor order this test?

 An electrodiagnostic study is a test that is ordered in order to help determine if there is a disorder associated with your nerves or muscles.  For example, it may be used to help determine if there is nerve impingement originating from the spine, a nerve entrapment in the extremities or a peripheral neuropathy that may be associated with diabetes or a thyroid condition.  

 How is it performed?

 There are two parts to the study.  The first part assesses the nerves by introducing a small electrical impulse to evaluate how the nerve responds.  The second part assesses the muscles by inserting a small pin into the muscle to evaluate their response.  There are no electrical impulses delivered in the second part of the exam.  Information that is obtained is generated into a waveform that can then be interpreted for pathology.

 Is there risk involved?

 Patients sometimes describe mild discomfort that is associated with nerve and muscle testing.  Often people report a similar sensation as what is experienced from rubbing feet through carpet and getting an electrical shock.  There may be some bruising that is experienced after muscle testing.  All needles are sterile and discarded after single patient use.

 What can I do to prepare for the test?

Please do not apply any lotions or creams on the day of the exam as this may impair the ability to assess nerve conduction.   You may continue taking all medications, although inform the doctor if you are on any blood thinners, such as Coumadin or Heparin.  Patients with low blood indices and patients with a history of cardiac arrhythmia or who have electrical stimulator devices, such as neurostimulators, pacemakers, or implanted defibrillators should consult their physician prior to performing the study in order to obtain clearance for completing the exam.        

Site Last Updated: 24-Sep-09
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