Videonystagmography (VNG) [also referred to as Electronystagmography (ENG)] is a group of tests used to study your balance system. A camera attached to a pair of goggles records your eye movement under different situations - as a series of lights move on the wall in front of you and after having water (warm and cool) introduced into your ear canals. It is not painful and does not leave ill effects, but you may notice dizziness for a few seconds during parts of the test. This test assists the doctor in determining the cause of dizziness or vertigo and in monitoring vestibular function over time. (Total test time is approximately one hour.)
To get accurate results there are a number of medications that should be discontinued 48 hours prior to testing. These include pain pills (with codeine), sleeping pills, cold or allergy pills, antihistamines, tranquilizers,
anti-nausea pills, sedatives, alcohol, and anti-dizziness pills. If you have any questions about your medications, please consult your referring physician or family doctor.
Make-up can also interfere with test results so it is advised not to wear any on the day of testing.
If nausea is common with your balance problem, avoid eating for two hours prior to your appointment. The total test time is approximately one hour and cannot be interrupted during that time. Please take this into account when making parking arrangements. If your balance problem interferes with driving, it would be advisable for you to have a companion with you.
Click here for instuction sheet for clients on day of test