Talk:Hearing test
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Cite this page: Hill, M.A. (2026, October 5) Embryology Hearing test. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Talk:Hearing_test |
2011
Incidence and clinical value of prolonged I-V interval in NICU infants after failing neonatal hearing screening
Eur Arch Otorhinolaryngol. 2011 Apr;268(4):501-5. Epub 2010 Nov 11.
Coenraad S, Hoeve LJ, Goedegebure A. Source Department of Otorhinolaryngology, Sophia Children's Hospital, Erasmus Medical Center, Dr. Molewaterplein 60, SP-1455, 3015 GJ, Rotterdam, The Netherlands. s.coenraad@erasmusmc.nl
Abstract
Infants admitted to neonatal intensive care units (NICUs) have a higher incidence of perinatal complications and delayed maturational processes. Parameters of the auditory brainstem response (ABR) were analyzed to study the prevalence of delayed auditory maturation or neural pathology. The prevalence of prolonged I-V interval as a measure of delayed maturation and the correlation with ABR thresholds were investigated. All infants admitted to the NICU Sophia Children's Hospital between 2004 and 2009 who had been referred for ABR measurement after failing neonatal hearing screening with automated auditory brainstem response (AABR) were included. The ABR parameters were retrospectively analyzed. Between 2004 and 2009, 103 infants were included: 46 girls and 57 boys. In 58.3% (60 infants) of our population, the I-V interval was recordable in at least one ear at first diagnostic ABR measurement. In 4.9%, the I-V interval was severely prolonged. The median ABR threshold of infants with a normal or mildly prolonged I-V interval was 50 dB. The median ABR threshold of infants with a severely prolonged I-V interval was 30 dB. In conclusion, in case both peak I and V were measurable, we found only a limited (4.9%) incidence of severely prolonged I-V interval (≥0.8 ms) in this high-risk NICU population. A mild delay in maturation is a more probable explanation than major audiologic or neural pathology, as ABR thresholds were near normal in these infants.
PMID 21069370
The influence of epidural anesthesia on new-born hearing screening: A pilot study
J Pharm Bioallied Sci. 2011 Jan;3(1):135-41.
Khoza-Shangase K, Joubert K. Source Department of Speech Pathology and Audiology, School of Human and Community Development, University of the Witwatersrand, Johannesburg, South Africa. Abstract OBJECTIVE: The main aim was to establish if epidural anesthesia had an influence on new-born hearing screening results in newborns born via elective Cesarean section in healthy pregnancies. Specific objectives included determining screening results in a group of newborns born to mothers who had undergone epidural anesthesia during Cesarean section childbirth (experimental group); and comparing the findings with those of a group of newborns born to mothers who had undergone natural delivery without epidural anesthesia (comparison group); while establishing if the time of screening following delivery had any effect on the overall screening results.
MATERIALS AND METHODS: The above objectives were achieved through the use of a prospective quasi-experimental repeated measures design with a comparison group, where 40 newborns (20 in the experimental and 20 in the comparison group) were screened at three different times through transient otoacoustic emissions (TEOAEs) and automated auditory brainstem response (AABR) measures. All participants were screened while resting quietly in open bassinets in an empty new-born nursery. For both test measures, the results were recorded as either pass or refer. Data were analyzed through both descriptive and inferential statistics.
RESULTS: Findings indicated that hearing screening earlier than four hours after birth, for both the experimental and comparison groups yielded more false positive findings than testing conducted after 24 hours. An index of suspicion in relation to the influence of epidural anesthesia on Automated Auditory Brainstem Response (AABR), when conducted less than four hours after birth, was raised, as statistically significant findings (P<0.05) were obtained.
CONCLUSIONS: The findings have implications for timing of screening where universal newborn hearing screening is being implemented.
PMID 21430964
Overview of newborn hearing screening activities in Latin America
Rev Panam Salud Publica. 2011 Mar;29(3):145-52.
Gerner de Garcia B, Gaffney C, Chacon S, Gaffney M. Source Educational Foundations and Research, Gallaudet University, Washington, DC, USA. barbara.gerner.de.garcia@gallaudet.edu Abstract OBJECTIVE: Ascertain the status of early hearing detection and intervention services in Latin America.
METHODS: Between June and November 2007, Gallaudet University, in collaboration with the U.S. Centers for Disease Control and Prevention Early Hearing Detection and Intervention Diversity Committee, disseminated a survey to 11 Latin American countries. It included questions about newborn hearing screening (NHS) procedures, the availability of intervention services for infants with hearing loss, and challenges in identifying infants with hearing loss. In addition, a literature review was conducted to help identify the status of NHS efforts in Latin America.
RESULTS: Six countries (Chile, Costa Rica, Guatemala, Mexico, Panama, and Uruguay) and one U.S. territory (Puerto Rico) responded to the survey. Responses indicated that efforts to identify infants with hearing loss vary within and across countries in Latin America. In some countries, activities have been implemented at a national level; in others, activities have been implemented at a single hospital or region within a country. Common barriers to implementation of NHS programs include a lack of funding, screening and diagnostic equipment, public awareness, and personnel qualified to work with infants and young children.
CONCLUSIONS: In spite of several barriers, NHS programs have been implemented in at least some facilities and regions in Latin America. Additional efforts are needed to expand NHS activities in Latin America.
PMID 21484013
Incidence and Pattern of Hearing Impairment in Children with ≤ 800 Gram Birth Weight in British Columbia, Canada
Acta Paediatr. 2011 Aug 8. doi: 10.1111/j.1651-2227.2011.02437.x. [Epub ahead of print]
Synnes AR, Anson S, Baum J, Usher L. Source Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada Child and Family Research Institute, Vancouver, BC, Canada Neonatal Follow-Up Program, Children's & Women's Health Centre of British Columbia, Vancouver, BC, Canada Audiology and Speech Sciences, University of British Columbia, Vancouver, BC, Canada.
Abstract
Aim: Evaluate changes over time in the characteristics of permanent hearing impairment (HI) in extremely low birth weight (ELBW < 800 grams) children. Methods: Data from sequential visits up to 5 years of age assessing hearing and other neurodevelopmental outcomes was extracted from a cohort of ELBW subjects born 1983-2006 at a single Canadian site. Trends in HI incidence, severity, and association with other impairments were analyzed in three 8 year epochs. Results: Fifty of 586 ELBW children had a HI. HI rates increased from 5% in epoch 1 to 7% in epoch 2 to 13% in epoch 3 (p= 0.01). Mild HI decreased from 78% in epoch 1 to 35% in epoch 3 (p =0.03). Median age at diagnosis decreased from 13 to 8 months. Comorbidities were more common in HI children than non HI children: cerebral palsy (40% vs 14%, p <0.0001)), cognitive (38% vs 12%, p <0.0001) and visual impairments (16% vs 6%, p=0.009). Conclusion: The incidence and severity of hearing impairment in a cohort of extremely low birth weight children increased significantly from 5% to 13% (p= 0.01) over a 24 year period. Comorbidities were common. Potentially modifiable causes are explored.
Acta Paediatrica © 2011 Foundation Acta Paediatrica.
PMID:= 21824192
The use of transient evoked otoacoustic emissions as a hearing screen following grommet insertion
J Laryngol Otol. 2011 Jul;125(7):692-5. Epub 2011 Apr 27.
Dale OT, McCann LJ, Thio D, Wells SC, Drysdale AJ. Source ENT Department, Musgrove Park Hospital, Taunton, UK. otdale@doctors.net.uk
Abstract OBJECTIVE: This study aimed to evaluate the sensitivity of transient evoked otoacoustic emission testing as a screening tool for hearing loss in children, after grommet insertion.
METHOD: A prospective study was conducted of 48 children (91 ears) aged three to 16 years who had undergone grommet insertion for glue ear. At post-operative review, pure tone audiometry was performed followed by transient evoked otoacoustic emission testing. Outcomes for both tests, in each ear, were compared.
RESULTS: The pure tone audiometry threshold was ≤ 20 dB in 85 ears (93.4 per cent), 25 dB in two ears (2.2 per cent) and ≥ 30 dB in four ears (4.4 per cent). Transient evoked otoacoustic emissions were detected in 69 ears (75.8 per cent). The sensitivity of transient evoked otoacoustic emission testing for detecting hearing loss was 100 per cent for ≥ 30 dB loss but only 66.7 per cent for ≥ 25 dB loss.
CONCLUSION: Transient evoked otoacoustic emission testing offers a sensitive means of detecting hearing loss of ≥ 30 dB following grommet insertion in children. However, the use of such testing as a screening tool may miss some cases of mild hearing loss.
PMID 21524331
2008
Detection of perinatal cytomegalovirus infection and sensorineural hearing loss in belgian infants by measurement of automated auditory brainstem response
J Clin Microbiol. 2008 Nov;46(11):3564-8. Epub 2008 Sep 3.
Verbeeck J, Van Kerschaver E, Wollants E, Beuselinck K, Stappaerts L, Van Ranst M. Source Laboratory of Clinical Virology, Rega Institute for Medical Research, Minderbroedersstraat 10, BE-3000 Leuven, Belgium.
Abstract
Since auditory disability causes serious problems in the development of speech and in the total development of a child, it is crucial to diagnose possible hearing impairment as soon as possible after birth. This study evaluates the neonatal hearing screening program in Flanders, Belgium. The auditory ability of 118,438 babies was tested using the automated auditory brainstem response. We selected 194 babies with indicative hearing impairment and 332 matched controls to investigate the association between the presence of human cytomegalovirus (HCMV) in urine samples and sensorineural hearing loss and to analyze the sensibility and specificity of a cell culture assay and a quantitative PCR detection method. Our results indicate that significantly more babies with confirmed hearing impairment were HCMV positive after birth. Further, based on the results of our study, babies with HCMV viral loads above 4.5 log copies/ml urine seem to be 1.4 times more likely to have confirmed hearing impairment. Our follow-up study suggests that the hearing impairment of children infected with HCMV after birth is less likely to improve than that of HCMV-negative infants. Our results confirm that the presence of HCMV before or shortly after birth influences the outcome of hearing impairment.
PMID 18768656
