|
 |
 |
BAER or brainstem auditory evoked potential is a painless noninvasive diagnostic test that evaluates the neurological pathways from the ear to the brainstem.
It is usually performed to evaluate multiple sclerosis, acoustic neuromas or problems with hearing. BAER testing usually requires approximately 90 minutes.
| How is a BAER recorded? |
| |
Before the test, a technologist will obtain a thorough history. The patient’s head will be measured, marked and four electrodes will be applied to the scalp. In most cases, the electrodes are applied with a special tape that is easily removed when the test is finished.
After the electrodes have been applied, the technologist will ask the patient to lie in a bed and relax. BAERs are best recorded on patients that can relax and preferably fall asleep. The technologist will look into the patient’s ear using an otoscope, a special flashlight, to ensure that the ear canal is not blocked.
Headphones will then be placed over the patient’s ears. The headphones deliver a rapid click which is the stimulation that travels through the neurological structures from the eardrum to the brainstem. The electrodes on the patient's scalp record how the brainstem processes this stimulation.
When the test has been completed, the patient’s scalp is cleaned. |
| Preparing for the BAER |
| |
Patients should continue taking their medication as normal. Please bring a list of current medications. Fasting is not required for a BAER, in fact, eating a meal or a snack prior to the test is advised. |
| |
Patients do not need to refrain from consuming caffeine products such as coffee, tea or soda. |
| |
Do not consume alcohol 12 hours before testing. |
| |
Make sure your hair is clean and dry. |
| |
Do not wear makeup, hair spray, gels or earrings. |
| Common Misconceptions |
| |
The BAER does not involve shocks, needles or hair cutting. Patients can have their family members in the room during the test. No small children please. |
| Testing Young Children |
| |
In order to accurately record a BAER, it is necessary for the patient to minimize their movements during head measurement and electrode application.
Unfortunately, young children and babies are generally not able to lay still for long periods of time. For this reason, small children usually need to have their movements restricted. We invite the parents to help with this process.
In addition, the electrodes will frequently need to be applied with a special glue to ensure a good contact throughout the test. The glue that is used does not harm the hair or skin.
When the testing is completed, the glue is removed with a solvent that also will not harm the hair or skin. |
| Test Results |
| |
A neurologist will interpret the BAER and results will be made available to the primary care physician within seven to ten business days. |
|
|
 |
Neurodiagnostic Lab
PHONE: (503) 561-5268 |
|
Services
