How to Prepare for a Diagnostic Test

Patients should let the physician know before the testing if they take any medications, if they have a bleeding problem or if they are taking blood thinners.


On the day of your test, please:

     1)  Wear loose-fitting clothing, so that we can test your arms and legs  

     2)  Do not apply lotion or oil to your skin

     3)  Do not wear bracelets or rings

     4)  Do not smoke or drink anything which contains caffeine for 3 hours before the test  




What to expect during the procedure 

Depending on the type of tests being performed, each test will take approximately 20-60 minutes.

For an NCV test:  Recording electrodes are taped to a particular nerve area like your arms, legs, hands or feet. A stimulating electrode is then placed over the nerve which sends a very small electrical current.


For an EMG test:  Small acupuncture-sized needles are inserted into the muscles of the arms, legs, hands or feet. A very small electrical current is then used to stimulate the muscle and record the nerve.




Should you have any questions, please talk to staff about any concerns you have regarding the need for the test, its risks, how it will be done or what the results will mean for your diagnosis and treatment.



How the test will feel

The impulse may feel like an small electrical stimulus. Depending on how strong the stimulus is, you will feel it to varying degrees, and it may be uncomfortable to you, but certainly not painful. Patients tolerate the testing very well.


Occasionally the Nerve Conduction Test is followed by the electromyography (EMG) which involves needles being placed into the muscle and you contracting that muscle. Again, you may feel slightly uncomfortable during the test, but no pain.



Please call for more details: 480.650.2944