Hearing test - ABR ranks and latencies (brainstem evoked potentials)
Referral: Not required
Age range: No age restrictions.
Waiting time for the result: Result available immediately after the test.
Hearing test - ABR ranks and latencies (brainstem evoked potentials)180PLN | e-Reservation >>
- During the examination, silence is required, the examinee cannot chew or swallow, and has his eyes closed to reduce visual stimuli.
- In young children, the examination is usually performed after feeding, while the child is asleep:
1) In the nighttime hours or early in the morning before the examination (before the traditional hour of getting up), it is necessary to wake the child and not allow him/her to fall asleep again until arriving at the laboratory so that at the hour of examination the child is sleepy and tired.
Take care that the child does not fall asleep during the journey!
2) The child should be lightly hungry on arrival at the examination, e.g. the child eats the last meal in the evening and then only in the morning at the laboratory before falling asleep.
Feeding the child just before the examination increases the child's chances of falling asleep faster.
Description of the study
Auditory potentials are recorded by air conduction. Two parameters in particular are analyzed: latency and V-wave threshold.
The timing of the appearance of the V-wave depends not only on the type of stimulus used, but also on the intensity of the stimulus. As the intensity of the stimulus decreases, the latency of the response increases and the amplitude decreases. The threshold of the V-wave is correlated with the hearing thresholds determined by audiometric testing.
Based on the ABR response threshold for air conduction, the hearing threshold is estimated, which is, among other things, the basis for selecting a hearing aid in a young child.
It is a hearing test that is used for both screening and diagnostic purposes. It can detect hearing damage in the middle ear, cochlea, auditory nerve and brainstem areas.
Correct answers recorded by the computer testify to the proper functioning of the auditory pathway to the level of the brainstem. They inform not only about the hearing threshold, but also about conduction in the structures of the nervous system.
- suspected hearing impairment in infants and young children,
- suspected sural nerve tumor,
- suspected simulated deafness or hearing loss,
- Monitoring the course of selected neurosurgical operations,
- auditory neuropathy,
- A study to aid in the evaluation of auditory processing disorders.