Final answer:
Before an electronystagmography, patients should bring eyeglasses if needed, report allergies, abstain from eating and drinking for a few hours before, drink fluids slowly afterwards, and avoid caffeine for 24 hours.
Step-by-step explanation:
Electronystagmography (ENG) is a diagnostic test used to evaluate the function of the vestibular portion of the inner ear. For accurate results, certain preparations are necessary. Instructions to a patient scheduled for an ENG may include:
- Bring eyeglasses to the test if they are normally used for vision correction.
- Report an allergy to iodine or shellfish as this can be relevant to the substances used during the test.
- Drinking fluids after the test should be done slowly to avoid nausea or dizziness.
- Ensuring to take nothing by mouth (NPO) for three hours before the test to reduce the risk of nausea.
- Avoiding caffeine products for 24 hours prior to the test as caffeine can affect the vestibular system and therefore the test results.