Establishment of Normative data for Monaural Recordings of Auditory Brainstem Response and its Application in Screening Patients with Hearing Loss: A Cohort Study
Objectives: To establish normative data required for recording Auditory Brainstem Response (ABR) using monaural stimulations in children with normal hearing. Methods: This study was conducted on 40 apparently healthy children. Database was collected after assessing with otological questionnaire...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2013-12-01
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| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://jcdr.net/articles/PDF/3730/7-%206768_E(C)_F(T)_PF1(Bo_PP)_PFA(NC)_OLF_New2_PF2(PP)_u.pdf |
| Summary: | Objectives: To establish normative data required for recording
Auditory Brainstem Response (ABR) using monaural stimulations
in children with normal hearing.
Methods: This study was conducted on 40 apparently healthy
children. Database was collected after assessing with otological
questionnaire, otoscopic examination and audiometric evaluation.
Brainstem Evoked Response Audiometry (BERA) was used as
a tool for establishment of normative data. ABR recordings by
monaural presentation were obtained by following the standard
test protocol given by Hall.
Results: ABR parameters like Absolute latencies, amplitudes,
amplitude ratios, Inter- peak latencies and thresholds were
assessed for their normative values which are required to
establish a baseline data. The Interaural latency difference was
less than 0.2 ms (milliseconds) and was found to be normal limit.
Mean values of absolute latencies for left ear were1.66 ms 3.68
ms and 5.64 ms respectively and for right ear these were 1.66
ms, 3.65 ms and 5.59 ms respectively. Mean values for amplitude
of wave I and V for left ear were 0.32 uV and 0.41 uV respectively.
For right values were 0.31 uV and 0.36 uV respectively. Mean
values of amplitude ratio (V/I) for left and right ears were 1.81 and
1.74 respectively. Mean values of interpeak latencies of wave I-III,
III-V, I-V were 2.02 ms, 2.02 ms and 3.92 ms respectively for left
ear and for right ear values were 2.04 ms, 1.98 ms and 4.03 ms
respectively. Mean values for left and right ear hearing threshold
was 25.25 dBnHL.
Conclusion: ABR parameters shows variation in values
depending upon age, myelination process, maturation of auditory
pathway, environmental factors, laboratory setup etc. Hence it is
concluded that each laboratory should have its own normative
data which can be used as a baseline data for screening of
patients with hearing loss. |
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| ISSN: | 2249-782X 0973-709X |