Preparing for a dizziness study - videonystagmography

How the videonystagmography (VNG) is conducted:

special glasses with an infrared camera are placed on the patient's eyes. In complete darkness, the patient's eye is illuminated by infrared light, but there is no sensation of light. The eye is lit with beams and the image is transmitted directly to the monitor. Various otoneurological tests provide quantitative and qualitative evaluation of eye movements (nystagmus). According to the indications, thermal labyrinth stimulation may be used, i. y. a stream of warm or cold air is blown into the patient's ear canal for a period of time. When the air stops blowing, the eye movements are examined for a set period of time. Eye movements are converted into digital signals, processed by special computer programs and presented as standardized graphs, which are then analyzed by a physician.

It is recommended that an VNG study be conducted for:

• patients who suffer from dizziness and balance disorders of various origins;
• patients with benign paroxysmal positional dizziness (PGPPGS);
• patients with Meniere's disease;
• patients with vestibular neuronitis;
• patients who suffered head injuries;
• those with a history of middle ear infection;
• poisoned.

How to prepare for the VNG:
72 hours it is recommended not to use:

• aspirin,
• non-steroidal anti-inflammatory drugs;
• anti-emetic medicines;
• anti-alergic drugs;
• narcotics;
• alcohol;