FOR MEDICAL PROFESSIONALS ONLY
What information does the iVNG balanceback™ system provide?
The iVNG Balanceback™ system is a complete iVNG system. iVNG (videonystagmography) is considered the the gold standard in evaluation of ear related vestibular disorders. The test battery incorporates oculomotor tests, positional and positioning tests and caloric irrigations. The oculomotor tests are sensitive to central disorders while the other tests are most sensitive to ear related disorders. iVNG should be used as part of a battery of tests to fully evaluate complaints of dizziness or imbalance.
Will the iVNG balanceback™ system confirm abnormalities in patients suspected of having balance disorders?
The purpose of iVNG testing is to determine whether or not the patient complaints of dizziness or imbalance are due to inner ear disease. If not caused by the inner ear, the problem may be due to central causes in which the oculomotor portion of iVNG testing is sensitive to. However, balance problems may be due to other areas such as muscle weakness and neuropathy. Therefore more testing may be needed.
Can the iVNG balanceback™ system produce abnormal results when my physical exam is normal?
Yes, depending on the issue, a iVNG test can be more sensitive than a physical examination. In ddition, if a problem is noted, the iVNG can help to determine the origin of the issue.
Can the iVNG balanceback™system produce a normal result when my physical exam is abnormal?
Yes. Again, depending on the issue. The iVNG is most sensitive to ear related disorders as well as providing central information. If, for example, the patient’s problem is related to blood pressure issues, the iVNG may come out “normal”.
What is the difference between CNS and Vestibular disorders? Does the iVNG balanceback system detect between CNS and Vestibular disorders or other conditions?
A central disorder of dizziness or imbalance refers to problems caused by the brain’s inability to correctly process input provided from the balance system – somatosensory, vision and vestibular. The oculomotor portions of the VNG are sensitive to central issues.
Vestibular disorders are often referred to as “ear related” disorders. This is considered a disorder of a peripheral origin and is associated with the vestibular system of the inner ear. The iVNG is considered the “gold standard” for diagnosis of ear related vestibular disorders.