What Is Auditory Brainstem Response?
The auditory brainstem response is a short-latency potential and is usually tested with short sounds. It can be used in combination with other audiological tests to identify the nature of hearing loss; it is most commonly used to check for the presence of post-cochlear lesions: such as prolonged wave latency, prolonged wave interval, significant difference in interauricular latency or wave interval, and waveform differentiation The difference indicates the possibility of the presence of retro-cochlear lesions.
Auditory brainstem response
Right!- Chinese name
- Auditory brainstem response
- Foreign name
- ABR (auditory brainstem response)
- Genus
- Short latency potential
- General use
- Test short
- The auditory brainstem response is a short-latency potential and is usually tested with short sounds. It can be used in combination with other audiological tests to identify the nature of hearing loss; it is most commonly used to check for the presence of post-cochlear lesions: such as prolonged wave latency, prolonged wave interval, significant difference in interauricular latency or wave interval, and waveform differentiation The difference indicates the possibility of the presence of retro-cochlear lesions.
- The main differential diagnosis of ABR is as follows: Transmissive hearing loss: The threshold of V wave response is increased but the threshold latency is in the normal range. Sonic latencythe intensity function curve shifts to the right. Meniere's disease: deafness with revitalization manifests as an increase in V-wave threshold, but when acoustic stimulation is within 20 dB above the threshold, the latency period is shortened and reaches a normal value; auditory neuroma: I-V wave interval is extended or V The wave disappears, but if the patient's I wave can not be definitely confirmed, the false positive rate is very high. At this time, comprehensive analysis should be combined with the cochlear electrogram to improve the diagnostic accuracy. The IV gap between the two ears is greater than 0.4ms, or the IV gap between the two ears is greater than 4.6ms (age and gender factors should be considered), suggesting that there is a snail lesion; diagnosis of brainstem lesions: multiple sclerosis, brainstem vascular disease and brainstem Tumors can also cause the amplitude of the evoked potential to decrease, the latency to prolong, or the waveform to disappear, which should be identified in conjunction with the medical history and related examinations. Functional deafness and pseudo-deafness: Objective hearing thresholds can be assessed objectively, but it should be noted that short-latency potentials and short-sound examinations tend to underestimate low-frequency residual hearing.