Auditory Brainstem Response Measurements in Newborns: Which Electrode Placement Is Better?

Area of Science:

• Audiology
• Neuroscience
• Pediatrics

Background:

• Early detection of hearing loss in infants is crucial for developmental outcomes.
• Auditory Brainstem Response (ABR) is a key diagnostic tool for infant hearing assessment.
• Optimizing ABR protocols enhances diagnostic efficiency and patient comfort.

Purpose of the Study:

• To identify the most efficient and effective Auditory Brainstem Response (ABR) protocol for audiological diagnosis in infants up to three months old.
• To compare the speed and reliability of two different electrode montages for ABR testing in newborns.
• To evaluate the impact of electrode placement on test duration and wave latencies.

Main Methods:

• Twenty-two newborns (0-63 days) underwent ABR testing using click stimuli.
• Two electrode montages were employed: ipsilateral/contralateral mastoid/vertex and nape/vertex/cheek.
• Analysis focused on latencies of waves I, III, V and overall test duration at various intensity levels (20-70 dBnHL).

Main Results:

• Wave V latencies were shortest at 70 dBnHL and longest at 20 dBnHL across both montages.
• Significant differences in test duration between montages were observed at 50 dBnHL.
• Test times at 70 dBnHL varied significantly between age groups (1-30 days vs. 31-63 days) in the first montage.

Conclusions:

• The second electrode montage (nape, vertex, cheek) is more practical and comfortable for single-channel ABR systems in pediatric audiology.
• Efficient and reliable ABR testing is vital for early diagnosis in infants.
• This study provides evidence for optimizing ABR protocols to improve the diagnostic experience for both newborns and audiologists.