VNG Patient Preparation Instructions

  • Videonystagmography (VNG) is used to evaluate patients with vertigo, dizziness, post-concussion syndromes and balance disorders.   During the test, your eye movements will be recorded through goggles as you follow verbal instructions given to you by the doctor. This provides information about the central and peripheral vestibular system. This data, combined with the information gleaned from your clinical examination, is then used to develop a customized treatment plan.                 
  • VHIT (Video Head Impulse Testing) is also utilized to assess Vestibular-Ocular Reflex (VOR) function which is the connection between the inner ear and the eyes. Similar to the VNG, this involves wearing a head sensor while eye and head movements are recorded.  The VHIT system is preferable to the caloric irrigation method, still used in many offices, which can provoke severe dizziness and discomfort. 

  1. Please do not eat solid foods 2-4 hours prior to your scheduled test unless you are instructed to for a medical condition (e.g. diabetes, etc.). 
  2. Please avoid consuming caffeine and caffeinated products for 12 hours prior to your scheduled test. Please continue to drink water to remain hydrated. 
  3. No alcoholic beverages may be consumed for 24 hours prior to your scheduled test. 
  4. If you are taking medications, please consult with your physician to see which you can avoid for 48 hours prior to testing. Specific medications that are important to consult your physician regarding include: tranquilizers, pain pills, muscle relaxants, dizziness pills (e.g. Meclizine, Antivert, Bonamine, etc.) and narcotics/ barbiturates. 
  5. Please avoid wearing facial cosmetics on the day of the test. 

Please do not cease any medications without approval from your physician.


If you have any questions regarding these preparation instructions, please call or email our office.