Document Detail

ABR recordings in newborns using an ear canal electrode.
MedLine Citation:
PMID:  18698524     Owner:  NLM     Status:  MEDLINE    
The objective of this study was to improve the sensitivity of ABR recordings in newborns via a procedure that utilizes the ear canal as a recording site. Conventional recordings were compared to ear canal recordings of the ABR in 45 normally-hearing newborns who passed their newborn hearing screening. Responses were obtained at stimulus levels of 80, 60, 40, and 20 dBnHL using forehead (+) to ear canal (-), versus forehead (+) to mastoid (-) electrode configurations. ABR parameters evaluated included measurement of component amplitudes of wave I and V, absolute latencies of I and V, the I-V interwave interval, and amplitude ratio. At stimulus levels of 80, 60, and 40 dBnHL, wave I amplitude was significantly larger using the ear canal configuration. This investigation shows that the amplitude of wave I is significantly larger and easier to identify when the ear canal is used as one of the recording sites in comparison to more conventional scalp (mastoid) recordings.
Anupa Gaddam; John A Ferraro
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of audiology     Volume:  47     ISSN:  1708-8186     ISO Abbreviation:  Int J Audiol     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-08-13     Completed Date:  2008-09-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101140017     Medline TA:  Int J Audiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  499-504     Citation Subset:  IM    
Audiology Department, Children's Hospital and Regional Medical Center, Seattle, Mail Stop W-6665, PO Box 5371, Seattle, WA 98105-0371, USA.
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MeSH Terms
Analysis of Variance
Audiometry, Evoked Response / instrumentation*,  methods*
Auditory Threshold*
Ear Canal / physiology
Equipment Design
Evoked Potentials, Auditory, Brain Stem*
Infant, Newborn
Otoacoustic Emissions, Spontaneous*
Reaction Time

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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