Document Detail

Auditory brainstem responses to bone-conducted brief tones in young children with conductive or sensorineural hearing loss.
MedLine Citation:
PMID:  22988461     Owner:  NLM     Status:  PubMed-not-MEDLINE    
The bone-conduction (BC) tone ABR has been used clinically for over 20 years. The current study formally evaluated the test performance of the BC tone-evoked ABR in infants with hearing loss. Method. By comparing BC-ABR results to follow-up behavioural results, this study addressed two questions: (i) whether the BC tone ABR was successful in differentiating children with conductive versus sensorineural hearing loss (Study A; conductive: 68 ears; SNHL: 129 ears) and (ii) the relationship between BC ABR and behavioural hearing loss severity (Study B: 2000 Hz: 104 ears; 500 Hz: 47 ears). Results. Results demonstrate that the "normal" BC-ABR levels accurately differentiated normal versus elevated cochlear sensitivity (accuracy: 98% for 2000 Hz; 98% for 500 Hz). A subset of infants in Study A with elevated BC-ABR (i.e., no response at normal level) had additional testing at higher intensities, which allowed for categorization of the degree of cochlear impairment. Study B results indicate that the BC ABR accurately categorizes the degree of cochlear hearing loss for 2000 Hz (accuracy = 95.2%). A preliminary dBnHL-to-dBHL correction factor of "0 dB" was determined for 2000 Hz BC ABR. Conclusions. These findings further support the use of BC tone ABR for diagnostic ABR testing.
Jennifer L Hatton; Renée M Janssen; David R Stapells
Publication Detail:
Type:  Journal Article     Date:  2012-09-04
Journal Detail:
Title:  International journal of otolaryngology     Volume:  2012     ISSN:  1687-921X     ISO Abbreviation:  Int J Otolaryngol     Publication Date:  2012  
Date Detail:
Created Date:  2012-09-18     Completed Date:  2012-09-19     Revised Date:  2013-04-02    
Medline Journal Info:
Nlm Unique ID:  101518366     Medline TA:  Int J Otolaryngol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  284864     Citation Subset:  -    
School of Audiology and Speech Sciences, The University of British Columbia, Vancouver, BC, Canada V6T 1Z3 ; Audiology Department, Britsh Columbia's Children' Hospital, Vancouver, BC, Canada V6H 3V4 ; British Columbia Early Hearing Program, Provicial Health Services Authority Victoria, BC, Canada V8V 3K3.
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