50+ Lifestyles

Ask the Audiologist

By Margaret Christiansen, Au.D.
Audiology Consultants, P.C.

What is a VNG Test?

    I have been scheduled for a VNG test. What is it and why do I have to stop taking certain medications prior to the test?

Videonystagmography, more commonly referred to as VNG, is a test performed to help identify the cause of
dizziness. This test is able to gather information regarding systems that help maintain balance and is helpful in locating the problem area in dizziness and related conditions.

The term dizziness means different things to different people. This term is often used to describe a spinning sensation, lightheadedness or imbalance. Prior to a VNG test, the audiologist will ask in depth questions to gain a better understanding of the symptoms you are experiencing and the pattern in which they occur.  This information, in conjunction with the results of the VNG test, is valuable for helping locate the cause of dizziness.

When a person gets dizzy, the eyes make a distinctive back and forth motion. These eye movements are measured using infrared goggles and serve as a window into the balance system.

The VNG test consists of three main parts: 1) following a light with your eyes; 2) moving into different head and body positions; and 3) irrigating the ears with warm and cool air.  Individuals may experience periods of dizziness or vertigo throughout the test, but this sensation is usually mild and brief.

In order to get the most complete information from this test, it is important to carefully follow the pre-test instructions. Certain restrictions apply for 48 hours prior to testing.  This is to allow time for certain substances (alcohol or medications for dizziness to name a few) to leave the body. Certain substances in the body can affect the test results and can lead to inaccurate or unclear results.

Dizziness can be caused by many different conditions. If you have concerns regarding your balance or dizziness, consult with your physician about the appropriate next steps. A VNG test is one of the tests your doctor may have you undergo to help locate or rule out areas of concern.

Margaret Christiansen is an audiologist at Audiology Consultants, P.C.  For more information consult our ad in this publication for store locations and phone numbers.