Document Detail

Ambient noise levels and infant hearing screening programs in developing countries: an observational report.
MedLine Citation:
PMID:  20557274     Owner:  NLM     Status:  MEDLINE    
Considering that current newborn/infant hearing screening (NHS) instruments were designed primarily for use in developed countries, this study set out to ascertain the potential effects of higher ambient noise levels on transient-evoked otoacoustic emissions (TEOAE) in sub-Saharan Africa. Data was drawn from two hospital-based and community-based NHS programs in Lagos, Nigeria, with a total screened population of 11 893 infants. Two automated TEOAE screening devices-Echo-Screen and ECHOCHECK-were available for this study. Ambient noise levels ranged from 61.0-90.5 dBA in the hospital wards and 55.6-82.5 dBA in the community health centers. One TEOAE model could not be activated at the prevailing noise levels. No significant pattern was observed in average noise levels and overall TEOAE referrals across all screening sites. However, the false-positive rates ranged from 1.4-13.8%. This study suggests that valid TEOAE screening is attainable in the Negroid race in settings with ambient noise levels up to 68 dBA but the associated high false-positive rates may necessitate additional screening with auditory brainstem response to achieve acceptable overall referral rates for timely diagnostic evaluation.
Bolajoko O Olusanya
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Publication Detail:
Type:  Journal Article; Multicenter Study    
Journal Detail:
Title:  International journal of audiology     Volume:  49     ISSN:  1708-8186     ISO Abbreviation:  Int J Audiol     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-08     Completed Date:  2010-10-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101140017     Medline TA:  Int J Audiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  535-41     Citation Subset:  IM    
Community Health and Primary Care, College of Medicine, University of Lagos, Lagos, Nigeria.
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MeSH Terms
Cross-Sectional Studies
Developing Countries
Evoked Potentials, Auditory, Brain Stem*
False Positive Reactions
Hearing Disorders / diagnosis*,  physiopathology*
Infant, Newborn
Neonatal Screening*
Otoacoustic Emissions, Spontaneous*

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

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