Vestibular Function Test
Health Checkups
estimated about CNY 200-500
(estimated about USD 30-70)
30 min
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Description
A vestibular function test evaluates inner ear balance disorders causing dizziness or vertigo, recommended for patients with unexplained falls or motion sensitivity; ChinaMedicalHub helps coordinate hospital appointments and interpreter support, with costs typically ranging ¥200–¥500.
Main Uses
Vestibular function tests are primarily used to diagnose and assess balance disorders, dizziness, and vertigo. They help in identifying the cause of symptoms related to the inner ear or brain, guiding treatment decisions, and monitoring the effectiveness of interventions. These tests are applicable in scenarios where patients experience unexplained dizziness, imbalance, or hearing loss, and when there is a need to differentiate between peripheral and central causes of these symptoms.
Normal Range
The normal range for vestibular function tests varies depending on the specific test being conducted. For example, in caloric testing, a normal response shows a nystagmus (involuntary eye movement) with a slow phase velocity of 5-10 degrees per second and a directional preponderance less than 25%. In rotational chair testing, gain values (eye velocity/head velocity) typically fall between 0.8 and 1.2, and time constants are usually around 15-20 seconds.
Low Values - Possible Causes
Low values or responses in vestibular function tests can be caused by: 1. Vestibular neuritis, 2. Labyrinthitis, 3. Benign paroxysmal positional vertigo (BPPV), 4. Ototoxicity due to certain medications, 5. Congenital abnormalities affecting the inner ear
High Values - Possible Causes
High values or abnormal responses in vestibular function tests might indicate: 1. Meniere's disease, 2. Acoustic neuroma, 3. Central nervous system disorders such as multiple sclerosis, 4. Migraine-associated vertigo, 5. Perilymph fistula
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