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VNG - Videonystagmography

VNG testing is used to determine if a vestibular (inner ear) disease may be causing a balance or dizziness problem, and is one of the only tests available today that can decipher between a unilateral (one ear) and bilateral (both ears) vestibular loss. VNG testing is a series of tests designed to document a person’s ability to follow visual objects with their eyes and how well the eyes respond to information from the vestibular system.

This test also addresses the functionality of each ear and if a vestibular deficit may be the cause of a dizziness or balance problem. To monitor the movements of the eyes, infrared goggles are placed around the eyes to record eye movements during testing. VNG testing is non-invasive, and only minor discomfort may be felt by some patients during testing as a result of wearing the infrared goggles. Appointments usually last about 1.5 hours, and testing is covered by all insurances.

vng-videonystagmography-diagnostic-device

There are 4 Parts to the Test

1. Occular Mobility

The patient is asked to have their eyes follow objects that move around in various patterns. The technician will be looking for any slowness or inaccuracies in their ability to follow visual targets. This may indicate a central or neurological problem, or possibly a problem in the pathway connecting the vestibular system to the brain.

2. Optokinetic Nystagmus

The patient is asked to view a large, continuously moving image to see if their eyes can appropriately track these movements. The technician will again be looking for any slowness or inaccuracies in their ability to follow visual targets. This may indicate a central or neurological problem, or possibly a problem in the pathway connecting the vestibular system to the brain.

3. Positional Nystagmus

The technician will move the patient’s head and body into various positions to make sure that there are no inappropriate eye movements (nystagmus), when your head is in different positions. This test assesses the inner ear system and the condition of the endolymph fluid in the semi-circular canals. The technician is verifying that small calcium carbonate particles called otoconia are not suspended in the fluid, causing a disturbance in the flow of the fluid.

4. Caloric Testing

The technician will stimulate both of the patient’s inner ears (one at a time) with warm and then cold air. They will be monitoring the movements of the patient’s eyes using goggles to make sure that both of their ears can sense this stimulation. This test assesses the functional stimulation response of the vestibular balance system in each ear. This test is the only test available that can decipher between a unilateral and bilateral loss.

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FAQ

Frequently Asked

LET'S TALK

+ What is VNG (Videonystagmography)?

Videonystagmography (VNG) is a diagnostic test used to assess balance and dizziness disorders. It measures involuntary eye movements (nystagmus) to help determine if the symptoms are caused by an inner ear problem or another underlying condition.

+ How does VNG work?

During a VNG test, special goggles are worn to record eye movements. The test involves following visual targets and performing specific movements while the equipment tracks eye responses. This helps doctors analyze how your eyes and inner ear are working together to maintain balance.

+ Why would I need a VNG test?

If you experience dizziness, vertigo, or balance issues, your healthcare provider may recommend a VNG test to determine whether your symptoms are related to an inner ear disorder, such as Benign Paroxysmal Positional Vertigo (BPPV) or other vestibular conditions.

+ Is the VNG test painful?

No, the VNG test is non-invasive and painless. It simply involves wearing goggles and following visual cues. Some patients may feel brief moments of dizziness during certain parts of the test, but this is temporary.

+ How long does the VNG test take?

A typical VNG test can take between 30 to 90 minutes, depending on the specific tests your healthcare provider needs to perform.

+ What do the results of a VNG test show?

The VNG test helps identify whether dizziness and balance problems are caused by an inner ear issue, a neurological problem, or other factors. Based on the test results, your doctor can create a treatment plan tailored to your needs.

+ Are there any risks associated with VNG?

VNG is considered safe and has minimal risks. Some patients may experience temporary dizziness or nausea during certain parts of the test, but these symptoms usually resolve quickly.

+ How soon will I receive my VNG test results?

In most cases, your doctor will review the results and discuss them with you shortly after the test or within a few days.

+ Where can I get a VNG test done?

You can schedule a VNG test through your healthcare provider. Physicians Options offers VNG testing as part of our comprehensive diagnostic services for balance and dizziness disorders.

VNG – Videonystagmography