Newborn hearing screening in a South African private health care hospital

Availability of resources for paediatric hearing care in a South African province

BACKGROUND

 Unavailability of healthcare resources can lead to poor patient outcomes. The latter is true for infants with hearing loss and require early hearing detection and intervention (EHDI).

AIM

 To determine the availability and distribution of resources for EHDI in state hospitals in the Eastern Cape (EC) province, South Africa.

SETTING

 Sixteen state hospitals (nine district, four regional and three tertiary hospitals).

METHODS

 Descriptive cross-sectional survey completed between July 2022 and October 2022.

RESULTS

 Thirteen hospitals had audiologists (n = 4) or speech therapists and audiologists (n = 9). Specific to equipment, 10 hospitals had a screening otoacoustic emissions or automated auditory brainstem response, 8 hospitals had diagnostic middle ear analysers and only 3 hospitals had diagnostic auditory brainstem response and/or auditory steady state response. Twelve hospitals did not have visual response audiometry (VRA) and 94% had no hearing aid verification systems. Budget allocations were uneven, with only 10 hospitals, i.e., 4 districts, all regional and 2 tertiary hospitals being allocated varying amounts. Subsequently, only 50% provided newborn hearing screening, 56% provided diagnostic evaluations and 14 hospitals fitted hearing aids.

CONCLUSION

 Results revealed a limited and uneven distribution of resources, which negatively impacted the provision of EHDI. Even distribution of healthcare resources and further research aimed at strengthening hearing health services is recommended as these could potentially improve equitable access to EHDI and the overall quality of healthcare provided.Contribution: This study highlights the need for even distribution of resources and strengthening of health systems, especially in the dawn of the National Health Insurance.

Sociodemographic Factors Affecting Loss to Follow-Up After Newborn Hearing Screening: A Systematic Review and Meta-Analysis

OBJECTIVE

Universal newborn hearing screening (NBHS) has been widely implemented as a part of early hearing detection and intervention (EHDI) programs worldwide. Even with excellent provider knowledge and screening rates, many infants do not receive definitive hearing testing or intervention after initial screening. The objective of this study was to identify sociodemographic factors contributing to loss of follow-up.

DATA SOURCES

PubMed, Scopus, and CINAHL.

REVIEW METHODS

Per Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, the databases were searched from the date of inception through December 28, 2021. Studies containing sociodemographic information on patients who were referred to NBHS were included. Meta-analysis of odds ratios (ORs) was performed comparing rates of sociodemographic variables between patients adherent and nonadherent to follow-up.

RESULTS

A total of 169,238 infants from 19 studies were included. Low birth weight (OR 1.6 [95% confidence interval, CI 1.2-2.2, p < .001), racial minority (OR 1.4 [95% CI 1.2-1.6], p < .001), rural residence (OR 1.5 [95% CI 1.1-1.9], p = .005), lack of insurance (OR 1 [95% CI 1.4-2.5], p < .001), and public or state insurance (OR 1.7 [95% CI 1.2-4.2], p = .008) were associated with missed follow-up after referred NBHS. Associated maternal factors included low maternal education (OR 1.8 [95% CI 1.6-2.0], p < .001), young maternal age (OR 1.5 [95% CI 1.5-1.6], p < .001), unmarried maternal status (OR 1.5 [95% CI 1.1-1.9], p = .003), and current or former maternal smoking status (OR 1.8 [95% CI 1.4-2.2], p < .001).

CONCLUSION

Both infant and maternal sociodemographic factors influence follow-up compliance after referred NBHS. Focused efforts should be made by medical providers and policymakers to address these factors to ensure appropriate newborn hearing care and interventions are achieved.

The Hearing Status of Preterm Infant’s ≤ 34 Weeks as Revealed by Otoacoustic Emissions (OAE) Screening and Diagnostic Brainstem Evoked Response Audiometry (BERA): A Tertiary Center Experience

To know the prevalence of hearing loss in preterm infants & to evaluate the sensitivity & specificity of otoacoustic emission (OAE) in detecting hearing loss in preterm infants ≤ 34 weeks. A total of 70 preterm babies from 28 to 34 weeks of gestational age were enrolled in the study. Detailed prenatal, perinatal, postnatal & family history and physical examination of the babies were carried out. First OAE was done at discharge or two weeks after birth, whichever was earlier and the second OAE assessment was done at 36-40 weeks of corrected age. Diagnostic brainstem evoked response audiometry (BERA) was done in all infants at 36-40 weeks of corrected age, at the time of second OAE. Neonates with hearing impairment were advised for early hearing aid amplification and were referred to the rehabilitation center for further management. The sensorineural hearing loss (SNHL) in either one of the ears was identified in 13 (18.57%) preterm babies. Bilateral profound SNHL was found in 5 (7.14%) babies. Auditory neuropathy profile was found in 7 (53.8%) out of 13 babies who had hearing loss. The sensitivity, specificity, positive and negative predictive values of second TEOAE compared with diagnostic BERA was 46.15%, 85.96%, 42.85%, and 87.5% respectively. Neonatal jaundice (p = 0.009) and history of exchange transfusion (p = 0.019) were found to be significant risk factors of hearing loss in our study. Other risk factors like mode of delivery, birth asphyxia, low APGAR score, meningitis, ototoxic drugs, and seizures were not associated with hearing loss. The prevalence of hearing loss in preterm infants < 34 weeks is very high. OAE alone is not an ideal screening test for high-risk neonates ≤ 34 weeks because of its low sensitivity. OAE combined with diagnostic BERA should be done in all high-risk infants preterm neonates ≤ 34 weeks to identify cases of auditory neuropathy spectrum disorders.

Analysis of barriers and facilitators to early hearing detection and intervention in KwaZulu-Natal, South Africa

Background

Objectives

Method

Results

Conclusion

Hearing Impairment in South Africa and the Lessons Learned for Planetary Health Genomics: A Systematic Review

Hearing impairment (HI) is a silent planetary health crisis that requires attention worldwide. The prevalence of HI in South Africa is estimated as 5.5 in 100 live births, which is about 5 times higher than the prevalence in high-income countries. This also offers opportunity to drive progressive science, technology and innovation policy, and health systems. We present here a systematic analysis and review on the prevalence, etiologies, clinical patterns, and genetics/genomics of HI in South Africa. We searched PubMed, Scopus, African Journals Online, AFROLIB, and African Index Medicus to identify the pertinent studies on HI in South Africa, published from inception to April 30, 2021, and the data were summarized narratively. We screened 944 records, of which 27 studies were included in the review. The age at diagnosis is ∼3 years of age and the most common factor associated with acquired HI was middle ear infections. There were numerous reports on medication toxicity, with kanamycin-induced ototoxicity requiring specific attention when considering the high burden of tuberculosis in South Africa. The Waardenburg Syndrome is the most common reported syndromic HI. The Usher Syndrome is the only syndrome with genetic investigations, whereby a founder mutation was identified among black South Africans (MYO7A-c.6377delC). GJB2 and GJB6 genes are not major contributors to nonsyndromic HI among Black South Africans. Furthermore, emerging data using targeted panel sequencing have shown a low resolution rate in Black South Africans in known HI genes. Importantly, mutations in known nonsyndromic HI genes are infrequent in South Africa. Therefore, whole-exome sequencing appears as the most effective way forward to identify variants associated with HI in South Africa. Taken together, this article contributes to the emerging field of planetary health genomics with a focus on HI and offers new insights and lessons learned for future roadmaps on genomics/multiomics and clinical studies of HI around the world.

Assessing Loss to Follow-up After Newborn Hearing Screening in the Neonatal Intensive Care Unit: Sociodemographic Factors That Affect Completion of Initial Audiological Evaluation

OBJECTIVES

Neonatal intensive care unit (NICU) patients are at high risk for congenital hearing loss. Previous studies have found sociodemographic factors associated with loss to follow-up for newborn hearing screening, but none have specifically studied the NICU population. Our objective is to determine if demographics and socioeconomic status is associated with loss to follow-up in a newborn population with extended NICU stay.

DESIGN

A retrospective cohort study was conducted on 443 NICU infants with extended NICU stay utilizing data extracted from infant and maternal medical records at an urban safety-net hospital.

RESULTS

Younger maternal age (adjusted odds ratio [OR] 0.95, confidence interval [CI] 0.91 to 0.99), higher gravidity (adjusted OR 1.39, CI 1.12 to 1.72), and former smoking status (adjusted OR 2.57, CI 1.07-6.18) were identified as independent predictors of loss to follow-up for NHS after conducting a multivariable logistic regression. Demographic and socioeconomic variables, such as sex, parity, birth weight, mode of birth, highest level of maternal education, maternal race/ethnicity, zip code metrics, and maternal language were not found to be associated with loss to follow-up.

CONCLUSIONS

Maternal age, gravidity, and smoking status are risk factors for loss to follow-up for NHS in newborns with extended NICU stay, a group at high risk for hearing loss. Our findings demonstrate that socioeconomic and demographic factors for loss to follow-up in the extended-stay NICU population are distinct from the well-baby population. Further investigation of these patients will allow prioritization of limited resources to subgroups within the extended-stay NICU population at risk for loss to follow-up for newborn hearing screening.

Community-Based Hearing and Vision Screening in Schools in Low-Income Communities Using Mobile Health Technologies

Introduction Globally, more than 50 million children have hearing or vision loss. Most of these sensory losses are identified late due to a lack of systematic screening, making treatment and rehabilitation less effective. Mobile health (mHealth), which is the use of smartphones or wireless devices in health care, can improve access to screening services. mHealth technologies allow lay health workers (LHWs) to provide hearing and vision screening in communities. Purpose The aim of the study was to evaluate a hearing and vision school screening program facilitated by LHWs using smartphone applications in a low-income community in South Africa. Method Three LHWs were trained to provide dual sensory screening using smartphone-based applications. The hearScreen app with calibrated headphones was used to conduct screening audiometry, and the Peek Acuity app was used for visual acuity screening. Schools were selected from low-income communities (Gauteng, South Africa), and children aged between 4 and 9 years received hearing and vision screening. Screening outcomes, associated variables, and program costs were evaluated. Results A total of 4,888 and 4,933 participants received hearing and vision screening, respectively. Overall, 1.6% of participants failed the hearing screening, and 3.6% failed visual acuity screening. Logistic regression showed that female participants were more likely to pass hearing screening (OR = 1.61, 95% CI [1.11, 2.54]), while older children were less likely to pass visual acuity screening (OR = 0.87, 95% CI [0.79, 0.96]). A third (32.5%) of referred cases followed up for air-conduction threshold audiometry, and one in four (25.1%) followed up for diagnostic vision testing. A high proportion of these cases were confirmed to have hearing (73.1%, 19/26) or vision loss (57.8%, 26/45). Conclusions mHealth technologies can enable LHWs to identify school-age children with hearing and/or vision loss in low-income communities. This approach allows for low-cost, scalable models for early detection of sensory losses that can affect academic performance.

Maternal knowledge and views regarding early hearing detection and intervention in children aged 0-5 years at a semi-urban primary care clinic in South Africa

BACKGROUND

South Africans have an increasing burden of hearing loss, especially in low-income rural areas. Limited information is available regarding caregivers' knowledge and views regarding infant hearing loss, which is essential for the successful implementation of early hearing detection and intervention (EHDI) programmes.

OBJECTIVES

The main aim of the study was to describe the knowledge and views of mothers with children aged between 0 and 5 years old regarding hearing screening, risk factors, symptoms of hearing loss, and intervention options for hearing loss.

METHOD

A survey was employed at a primary care clinic to gain insight into the maternal views on hearing loss and early intervention services for children aged 0-5 years old.

RESULTS

The majority (83.2%) of the mothers believed that hearing can be tested at birth, 90.7% believed in the biomedical model of intervention which is based on cure, prevention, and pathology as opposed to traditional or alternative medicinal beliefs, and 95.3% indicated that they would seek medical attention if they noticed symptoms of hearing loss. Consequences of hearing loss, such as academic, communication and social problems, were indicated by 65.4% of mothers.

CONCLUSION

The findings demonstrated that although cultural beliefs regarding superstitious causes of hearing loss and use of traditional medicine exist, satisfactory maternal knowledge regarding detection and intervention for hearing loss is present. Maternal views are favourable and a general willingness to participate in EHDI programmes was present. This study advocates for the implementation of EHDI programmes at all primary healthcare clinics across South Africa.

Current sedation practices in paediatric audiology clinics in gauteng, South Africa

AIM

The aim was to describe the current practices in sedation during AEP testing in infants and young children in Gauteng.

METHODS

An exploratory qualitative research design was employed, where telephonic and face-to face interviews were conducted with 48 participants in paediatric audiology clinics that have AEP testing facilities in Gauteng, South Africa. Qualitative analysis was done, with inductive thematic analysis used for open ended questions.

RESULTS

Findings revealed that 38% of the participants, majority of which were testing children under the age of 2 years, utilised natural sleep during testing, with only 29% utilizing conscious sedation. While all participants ensured pre-procedure fasting, findings revealed that 83% did not have or were unsure about the availability of monitoring methods, 63% had no emergency equipment, while 67% had no recovery and discharge criteria in their clinics. Conscious sedation at the outpatient clinic was mostly conducted by a registered nurse/an Ear, Nose & Throat specialist, with the anaesthesiologist serving in this role for AEP testing in theatre under general anaesthesia. Oral chloral hydrate and promethazine are the most commonly used medications, with melatonin also listed for conscious sedation. Propofol is the most commonly used for AEP testing in theatre. Three challenges were identified and these add to the implications raised by current findings.

CONCLUSION

Current findings have implications for audiological assessment of the difficult-to-test population in this context; with a need for resource availability and access deliberations highlighted.

Early hearing detection and intervention: Reflections from the South African context

For researchers and clinicians in developing contexts like South Africa, the establishment of universal newborn hearing screening (UNHS) programmes is something which we have strived to achieve. However, we need to ask the question as to whether we have attempted to view our ultimate goal of achieving mandated UNHS programmes from the perspective of the South African healthcare system as a whole. The current manuscript is aimed at providing an overview of audiological services within a broader context, with reflections from a South African perspective, and a suggestion to consider alternatives to UNHS, particularly in the South African public health care sector.

Evaluation of transient-evoked otoacoustic emissions in a healthy 1 to 10 year pediatric cohort in Sub-Saharan Africa

OBJECTIVE

Transient-evoked otoacoustic emissions (TEOAEs) monitor cochlear function. High pass rates have been reported for industrialized countries. Pass rates in low and middle income countries such as Sub-Saharan Africa are rare, essentially lower and available for children up to 4 years of age and frequently based on hospital recruitments. This study aims at providing additional TEOAE pass rates of a healthy Sub-Saharan cohort aged 1-10 years with data from Gabon, Ghana and Kenya. Potentially confounding factors (recruitment site, age) are taken into consideration.

METHODS

Healthy children were recruited in hospitals, schools and kindergartens. Inclusion criteria were age 1-10 years and normal otoscopic findings. Exclusion criteria were any sickness or physical ailment potentially impairing the hearing capacity. Five measurements per ear were performed with Capella Cochlear Emission Analyzer (MADSEN, Germany). An overall wave reproducibility of above 60% served as pass-criterion. Pass rates were compared between recruitment sites and age groups (1-5 and 6-10 years).

RESULTS

Overall pass rate was 87.5% (n = 264; 231 passes vs. 33 fails). Of these 84.0% of hospital recruited children passed (n = 156; 131 passes vs. 25 fails), compared to 92.6% of community recruitments (n = 108; 100 passes vs. 8 fails), which was significantly different p = 0.039). If analyzed by age groups, this difference was only observed in children younger than 6 years (p = 0.007).

CONCLUSION

Hospitals as recruitment sites for healthy controls seem to affect TEOAE pass rates. We advise for a cautious approach when recruiting healthy TEOAE control collectives under the age of 6 in a hospital setting. In children older than 6 years conventional pure-tone audiometry remains the standard method for hearing screening.

Public awareness of audiology, hearing and hearing health in the Limpopo Province, South Africa

BACKGROUND

The burden of hearing loss is on the increase, especially in low-income countries such as South Africa. The need for urgent action to prevent ear and hearing problems is a priority, especially as in many cases permanent hearing loss is preventable. In South Africa, as in other developing countries, there is a limited number of hearing health professionals and audiological resources. The lack of hearing health services may impact the general public's awareness of hearing and hearing health. Limited information is available on the South African public's knowledge of audiologists and the services they provide, especially in underserved rural communities.

AIM

The aim of this study was to describe individuals' awareness of the audiology profession, hearing and hearing loss, and hearing health in a rural area of the Limpopo Province.

METHOD

A cross-sectional survey design was employed for the purpose of this study. Using a random sampling strategy, 297 households in four rural villages were selected and a selfdeveloped questionnaire was administered to one individual (18 years and older) per household. The questionnaire consisted of 23 questions targeting awareness of the audiology profession, as well as knowledge of hearing, hearing loss and hearing health.

RESULTS

Only 14% of participants were aware of the audiology profession, indicating that individuals living in rural communities are not aware of the role of audiologists and the services they provide. Doctors and nurses were identified by participants as the individuals who assist them with hearing-related problems. Although most participants (87%) acknowledged that it is very important to undergo a hearing test, only 5% have previously visited an audiologist. Most participants were aware that ear infections and excessive noise exposure can cause hearing loss. The majority also believed that ears must be kept clean at all times and used cotton buds to maintain ear hygiene.

CONCLUSION

There is a general lack of public awareness of audiologists and the services they offer. This study highlighted the need for the National Department of Health in collaboration with professional associations and hearing health professionals to develop and implement effective strategies to increase the South African public's awareness of the profession and the services they provide. South African universities can also play a significant role in teaching students to develop context-relevant strategies to increase awareness of the profession.

Universal newborn hearing screening in southwestern Iran

OBJECTIVES

The implementation of Neonatal Hearing Screening (NHS) program is still at the preliminary stage particularly in developing countries despite the burden of permanent congenital and early-onset hearing impairment. The purpose of this study was to report results for universal newborn NHS in a cohort of children born in the southwestern region of Iran, as part of a national screening program set up by the Iranian National Health System.

METHODS

During this cross-sectional study, which took place between March 2013 and April 2016, healthy newborns were screened using transient evoked otoacoustic emissions (TEOAEs) and automated auditory brainstem responses (AABRs) methods at several points in time as early as possible after birth. Screening followed a two-stage strategy and newborns referred after the second-stage screening were scheduled for diagnostic evaluation.

RESULTS

A total of 92,521 newborns were screened in the urban (n = 67,780) and rural (n = 24,741) regions. Hearing impairment was confirmed in 223 (2.41 per 1000) newborns. One hundred forty-one (1.52 per 1000) of these newborns were affected bilaterally. More than 87% of these infants (195/223) showed a sensorineural hearing loss, while the defect was found to be conductive in 12 cases (P < 0.001). Of the 223 cases with hearing loss, 28 (12.5%) infants had auditory neuropathy. The majority of the infants, in both urban and rural regions, showed severe hearing impairment. We did not observe any significant difference among the incidences associated with gender (p = 0.29).

CONCLUSION

Our results demonstrated that universal newborn hearing screening program is an adequate program for southwestern of Iran with high coverage, low referral rate, and good follow-up rate.

Diagnostic hearing testing of infants aged 0-36 months in 3 South African provinces - Comparison of audiology records to HPCSA guidelines

INTRODUCTION

Within the Early Hearing Detection and Intervention (EHDI) pathway, which includes the processes of screening, diagnosis and intervention for paediatric hearing loss, paediatric diagnostic audiology involves a battery of specific tests and procedures. International studies have highlighted a golden standard for diagnosis of paediatric hearing loss as based on the Joint Committee of Infant Hearing (2007) diagnostic guidelines, closely resembling the HPCSA diagnostic guidelines. There are limited South African studies on the processes and protocols followed in diagnostic paediatric audiology.

OBJECTIVES

This study aims to provide a comparison for how the tests used for diagnosis of paediatric hearing loss in South Africa (within both the public and private healthcare sectors) compare to the HPCSA recommended diagnostic guidelines.

METHODS

A retrospective record review of paediatric clients with hearing loss (recruited through nonprobability convenience sampling) was conducted. This study is part of a longitudinal study of 711 deaf or hard of hearing children referred to the HI HOPES early intervention programme from September 2006 to December 2011. Diagnostic data from audiology reports of 117 children between 0 and 36 months were coded and analysed.

RESULTS

Large variation was found in the tests included in the diagnostic audiology reports. For 22 children (19%) a comprehensive test battery was used. Health Professions Council of South Africa (HPCSA) recommended guidelines for diagnostic testing were not followed in any of the records analysed. Components of the HPCSA recommended test battery most frequently omitted was bone conduction testing. For both electrophysiology and behavioural testing, there was limited frequency specificity information. This exclusion of information is evidence of deficiencies in data recording and management, as well as having an effect on accuracy of classification of degree and type of hearing loss.

CONCLUSION

There are gaps in age-appropriate assessment protocols, which will have an effect on accurate differential diagnosis of paediatric hearing loss. Reasons for not including all testing components of the HPCSA recommended guidelines, as well as the possibility of developing guidelines more relevant to a developing world context, should be explored. There might be a need for. The impact of South African specific factors that have an effect on provision of accurate paediatric diagnostic audiology services should be determined.

Follow-up in newborn hearing screening - A systematic review

INTRODUCTION

The quality and efficiency of newborn hearing screening programs (NHS) rely heavily on appropriate follow-up. The Joint Committee on Infant Hearing recommends a follow-up rate of more than 95% of infants who fail the initial hearing screening. However, a 70% benchmark is considered to be more feasible. This high loss to follow-up (LTF) rate acts as a threat to the overall success of NHS programs. The objective of the study was to identify and examine the reported rates of LTF, attributed reasons for LTF and strategies undertaken to reduce LTF.

METHODS

Using a systematic search, articles published between 2005 to December 2015 were identified from PubMed/Medline, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Educational Resources Information Center (ERIC), Scopus, Ovid, ProQuest, and Cochrane Library. To be included in the review, the study should be exploring the loss to follow-up or drop-out rate in newborn hearing screening programs and be published in an indexed peer-reviewed journal in the English language. The main outcome measures were overall rate of LTF, factors leading to LTF and measures adopted to overcome LTF.

RESULTS

53 articles were short-listed for data extraction. Out of these, 27 were single-centre studies, 19 were multi-centre, 3 compared multiple databases, and 4 used survey-based methods. Overall LTF rates of 20% in single-centre and 21% in multiple-centre studies were observed. Educational disparity and lack of adequate knowledge among parents were associated with LTF. The most commonly used strategy to overcome LTF suggested by studies was the use of an adequate data management system.

CONCLUSION

This review is a novel attempt to explore the LTF among NHS studies, reasons for LTF and strategies to reduce LTF. This review can act as a basis for planning and execution of effective NHS programs.

Avaliação do programa de triagem auditiva neonatal da Clínica Escola do Univag

RESUMO Objetivo: verificar se a porcentagem de recém-nascidos que falharam na triagem auditiva do serviço da Clínica Escola do Centro Universitário de Várzea Grande está dentro do determinado pelos indicadores de qualidade dos serviços de Triagem Auditiva Neonatal. Método: estudo retrospectivo, no qual foram analisados os resultados dos exames de Emissões Otoacústicas Transientes realizados no período de Outubro de 2013 a Agosto de 2014, em um serviço gratuito de triagem auditiva neonatal opcional do setor privado de uma universidade da cidade de Várzea Grande-Mato Grosso, Brasil. Compuseram a amostra 251 participantes, subdivididos em dois grupos: grupo de baixo risco composto por 210 participantes, sendo 100 do gênero feminino e 110 do masculino e; grupo de alto risco composto por 41 participantes, sendo 17 do gênero feminino e 24 do masculino. Resultados: foram analisados os resultados da triagem auditiva obtidas com o teste das Emissões Otoacústicas Transientes sendo que no grupo de baixo risco 39,52% passaram, 4,76% falharam e 55,71% não compareceram ao serviço para finalização da triagem. Já no grupo de alto risco, 48,78% passaram, 14,63% falharam e 36,59% não compareceram ao serviço para finalização da triagem, conforme demonstrado nas Tabelas 1 e 2. Conclusão: a porcentagem de indivíduos que falharam na triagem auditiva neonatal pelo serviço avaliado está acima do preconizado pela literatura.

Narrative review of EHDI in South Africa

Background

With 17 babies born with hearing loss every day in South Africa, there is a pressing need for systematic Early Hearing Detection and Intervention (EHDI) services. Progress is being made in offering newborn hearing screening and studies have been conducted to document these processes within South Africa. However, due to the lack of a national and holistic overview of EHDI services to date, an accurate picture of the current status of EHDI within the South African context is required.

Objective

To document and profile what has been published within the field of EHDI in South Africa over the last two decades (Jan 1995–Sept 2014) in order to gain a comprehensive overview of the current status and practice of screening and diagnosis in the field of paediatric hearing loss.

Method

A narrative review of peer-reviewed articles related to EHDI in South Africa was conducted by searching the EBSCOHOST, SCOPUS and JSTOR databases for the period January 1995 to September 2014.

Results

Results indicate that over the last two decades research and publications in the field of EHDI have increased considerably. These publications have revealed extensive knowledge related to paediatric hearing screening and intervention services in South Africa; however, this knowledge seems to be limited primarily to the provinces of Gauteng and the Western Cape. Furthermore, studies pertaining to diagnosis have revealed that, although much has been written on the scientific aspects on tools for diagnosis of hearing loss, there is a lack of comprehensive information on diagnostic protocols and procedures.

Conclusion

Despite the clear progress being made in South Africa in the field of early hearing detection and intervention, there is a need for comprehensive studies on protocols and procedures in diagnosing paediatric hearing loss. Finally, the narrative review revealed a clear need to ensure that development and growth in the field of EHDI is a national priority and extends beyond the two provinces currently showing growth.

Neonatal hearing screening in a low-risk maternity in São Paulo state

INTRODUCTION

The literature indicates that neonatal hearing screening should be universal, so a description of programs that adopt this recommendation is relevant.

OBJECTIVE

To describe the results of newborn hearing screening and the profile of mothers and newborns attended to in a low-risk maternity setting, and to correlate the characteristics of this population with the results of transient evoked otoacoustic emissions.

METHODS

A contemporary cross-sectional cohort study. The sample consisted of 670 infants and the procedures performed were audiological history, transient-evoked otoacoustic emissions (TEOAE), distortion product-evoked otoacoustic emissions (DPEOAE), and automated-brainstem auditory evoked potential (ABSAEP).

RESULTS

The rate of success in this program was 98.5%, the failure rate was 0.62%, and that of non-attendance to finalize the diagnostic process, 0.93%. When correlating the variables studied with the results of transient evoked otoacoustic emissions, there was a significant negative correlation only for age of infant.

CONCLUSION

The program of this maternity hospital was effective and complies with national and international recommendations. The population consisted of young mothers with few pregnancy complications and healthy infants. The only variable that influenced transient evoked otoacoustic emission results, after hospital discharge, was the age at which infants were evaluated.

A national system for monitoring the performance of hospitals in Ethiopia

Many countries struggle to develop and implement strategies to monitor hospitals nationally. The challenge is particularly acute in low-income countries where resources for measurement and reporting are scarce. We examined the experience of developing and implementing a national system for monitoring the performance of 130 government hospitals in Ethiopia. Using participatory observation, we found that the monitoring system resulted in more consistent hospital reporting of performance data to regional health bureaus and the federal government, increased transparency about hospital performance and the development of multiple quality-improvement projects. The development and implementation of the system, which required technical and political investment and support, would not have been possible without strong hospital-level management capacity. Thorough assessment of the health sector’s readiness to change and desire to prioritize hospital quality can be helpful in the early stages of design and implementation. This assessment may include interviews with key informants, collection of data about health facilities and human resources and discussion with academic partners. Aligning partners and donors with the government’s vision for quality improvement can enhance acceptability and political support. Such alignment can enable resources to be focused strategically towards one national effort – rather than be diluted across dozens of potentially competing projects. Initial stages benefit from having modest goals and the flexibility for continuous modification and improvement, through active engagement with all stakeholders.

Evaluation of universal newborn hearing screening in South African primary care

BACKGROUND

Universal Newborn Hearing Screening (UNHC) is the gold standard toward early hearing detection and intervention, hence the importance of its deliberation within the South African context.

AIM

To determine the feasibility of screening in low-risk neonates, using Otoacoustic Emissions (OAEs), within the Midwife Obstetric Unit (MOU) three-day assessment clinic at a Community Health Centre (CHC), at various test times following birth.

METHOD

Within a quantitative, prospective design, 272 neonates were included. Case history interviews, otoscopic examinations and Distortion Product OAEs (DPOAEs) screening were conducted at two sessions (within six hours and approximately three days after birth). Data were analysed via descriptive statistics.

RESULTS

Based on current staffing profile and practice, efficient and comprehensive screening is not successful within hours of birth, but is more so at the MOU three-day assessment clinic. Significantly higher numbers of infants were screened at session 2, with significantly less false-positive results. At session 1, only 38.1% of the neonates were screened, as opposed to more than 100% at session 2. Session 1 yielded an 82.1% rate of false positive findings, a rate that not only has important implications for the emotional well-being of the parents; but also for resource-stricken environments where expenditure has to be accounted for carefully.

CONCLUSION

Current findings highlight the importance of studying methodologies to ensure effective reach for hearing screening within the South African context. These findings argue for UNHS initiatives to include the MOU three-day assessment to ensure that a higher number of neonates are reached and confounding variables such as vernix have been eliminated.

National survey of paediatric audiological services for diagnosis and intervention in the South African private health care sector

OBJECTIVE

A national survey of early hearing detection and intervention services was undertaken to describe the current status of diagnostic and intervention services in the South African private health care sector.

METHODS

All private hospitals with obstetric units (n = 166) were surveyed telephonically. The data was integrated with data collected from self-administered questionnaires subsequently distributed nationally to private audiology practices providing hearing screening at the respective hospitals reporting hearing screening services (n = 87). Data was analysed descriptively to yield national percentages and frequency distributions.

RESULTS

Average reported age at diagnosis was 11 months. Most participants (74%) indicated that less than 20% of infants fitted with hearing aids received amplification before the age of 6 months. Most (64%) participants indicated that the average period between confirmed diagnosis and hearing aid fitting was 1 month, on par with international benchmarks. Only 16%-23% of participants included all diagnostic procedures recommended by the Health Professions Council of South Africa's 2007 position statement for minimum diagnostic test batteries for infants and young children.

CONCLUSIONS

Diagnosis of hearing loss, hearing aid fitting and audiological intervention is delayed significantly in the South African private health care sector. Improved services should include integrated systematic hospital-based screening as part of birthing packages with diagnostic referral to specialist paediatric audiologists for accurate assessment and management of patients in a timely manner.

Auditory screening in infants for early detection of permanent hearing loss in northern iran

Background:

Undiagnosed hearing loss can cause disorders in speech and language and delay in social and emotional development.

Aim:

This study aimed to screen for hearing loss in all newborns born in Babol city during 2009-2011.

Subjects and Methods:

Fifteen thousand one hundred and sixty-five newborns (49% [7430/15165] male and 51% [7735/15165] female) born during a 30-month period in Babol, underwent hearing screening by the otoacoustic emission (OAE) test at the age of 15 days. In infants referred at this stage, an auditory brainstem response (ABR) test was the next investigation. Data analyzed using Statistical Package for the Social Sciences software Version 16 (Chicago, IL, USA, 16) through descriptive statistic method.

Results:

In the first screening stage, 10.8% (1648/15165) cases were referred to the second stage for further investigation. 9.4% (154/1648) were lost to follow-up from among the referred cases despite continuous contact and education about the importance of the problem. Among the participants in the second stage, 6.2% (92/1494) were referred to the third stage and underwent ABR and OAE testing. 14.1% (13/92) were lost at this stage. Of the remaining participants, 34.2% (27/79) were diagnosed with a hearing loss. Therefore, the incidence of hearing loss in this study was 1.8/1,000 newborns.

Conclusion:

Given the prevalence of hearing loss in this study, implementation of a universal newborn hearing screening program is recommended.

Why parents refuse newborn hearing screening and default on follow-up rescreening--a South African perspective

OBJECTIVES

This study describes screen refusal and follow-up default characteristics together with caregiver reasons for screen refusal and follow-up default in two South African universal newborn hearing screening programs.

METHODS

A retrospective record review of universal newborn hearing screening conducted at two hospitals (Hospital A n = 954 infants; Hospital B n = 2135) over a 31-33 month period. Otoacoustic emission screening was conducted with rescreen recommended within six weeks for a uni- or bilateral refer. Program efficacy was described according to coverage, referral and follow-up rates. A prospective telephonic interview with caregivers who declined the initial screen (n = 25) and who defaulted on follow-up (n = 25) constituted the next study component. Caregivers were randomly selected from the screening programs for a survey related to reasons for newborn hearing screening refusal and follow-up default.

RESULTS

Screening coverage (89.3% Hospital A; 57.4% Hospital B), initial referral rates (11.6% Hospital A; 21.2% Hospital B) and follow-up return rates (56.1% Hospital A; 35.8% Hospital B) differed significantly between hospitals and were below benchmarks. The most frequent reasons for screen refusal were related to costs (72%), caregiver knowledge of newborn hearing screening (64%) and health care professional knowledge and team collaboration (16%). Almost all caregivers (96%) indicated that if costs had been included in the birthing package or covered by medical insurance they would have agreed to newborn hearing screening. Reasons for follow-up default were most commonly related to caregiver knowledge of newborn hearing screening (32%) and costs (28%). One in four caregivers (24%) defaulted on follow-up because they forgot to bring their infant for a rescreen. Only half of caregivers (48%) who defaulted on follow-up reported being aware of initial screen results while 60% reported being aware of the recommended follow-up rescreen.

CONCLUSION

Caregivers most commonly refused screening due to associated costs and mostly defaulted on follow-up due to an apparent lack of knowledge regarding initial screen outcome and recommendations made for follow-up. Including NHS as a mandated birthing service is essential if coverage is to be increased, while reducing follow-up defaults requires proactive reminders and improved communication with caregivers.

Assessment of the feasibility and coverage of a modified universal hearing screening protocol for use with newborn babies of migrant workers in Beijing

BACKGROUND

Although migrant workers account for the majority of newborns in Beijing, their children are less likely to undergo appropriate universal newborn hearing screening/rescreening (UNHS) than newborns of local non-migrant residents. We hypothesised that this was at least in part due to the inadequacy of the UNHS protocol currently employed for newborn babies, and therefore aimed to modify the protocol to specifically reflect the needs of the migrant population.

METHODS

A total of 10,983 healthy babies born to migrant mothers between January 2007 and December 2009 at a Beijing public hospital were investigated for hearing abnormalities according to a modified UNHS protocol. This incorporated two additional/optional otoacoustic emissions (OAE) tests at 24-48 hours and 2 months after birth. Infants not passing a screening test were referred to the next test, until any hearing loss was confirmed by the auditory brainstem response (ABR) test.

RESULTS

A total of 98.91% (10983/11104) of all newborn children underwent the initial OAE test, of which 27.22% (2990/10983) failed the test. 1712 of the failed babies underwent the second inpatient OAE test, with739 failing again; thus significantly decreasing the overall positive rate for abnormal hearing from 27.22% to 18.36% ([2990-973 /10983)]; p = 0). Overall, 1147(56.87%) babies underwent the outpatient OAE test again after1-month, of whom 228 failed and were referred for the second outpatient OAE test (i.e. 2.08% (228/10983) referral rate at 1month of age). 141 of these infants underwent the referral test, of whom 103 (73.05%) tested positive again and were referred for a final ABR test for hearing loss (i.e. final referral rate of 1.73% ([228-38/10983] at 2 months of age). Only 54 infants attended the ABR test and 35 (0.32% of the original cohort tested) were diagnosed with abnormal hearing.

CONCLUSIONS

Our study shows that it is feasible and practical to achieve high coverage rates for screening hearing loss and decrease the referral rates in newborn babies of migrant workers, using a modification of the currently employed UNHS protocol.

Emissões Otoacústicas Evocadas por Estímulo Transiente: protocolos de Triagem Auditiva Neonatal

OBJETIVO: descrever os resultados de três protocolos de EOAET de um equipamento automático utilizado em um Programa de TAN. MÉTODO: o equipamento utilizado foi programado com três critérios diferenciados de passa/falha. Protocolo A: Passar em 4 bandas de frequência, não precisando ser consecutivas; Protocolo B: Passar em 3 bandas de frequência, não precisando ser consecutivas e Protocolo C: Passar em 2 bandas de frequência, não precisando ser consecutivas. Os parâmetros para considerar presença de respostas foram: reprodutibilidade acima de 50%, relação sinal ruído > que 3dB em 1.0 e 1.5kHz e > 6dB em 2.0, 3.0 e 4.0kHz. RESULTADOS: 574 orelhas foram analisadas, sendo que as bandas de frequência de 2.0, 3.0 e 4.0kHz foram as que apresentaram percentuais de "passa" mais elevados (94,1; 95,8 e 92,7%, respectivamente). A banda de frequência de 1.0kHz obteve resposta presente em apenas 9,9% das orelhas testadas. Verificou-se que a análise do Protocolo C (2 bandas) foi a que apresentou o maior percentual de passa (96,9%). Porém este percentual não é considerado estatisticamente diferente do Protocolo B, 3 bandas, (96,2%) com valor de p=0,520. Assim, ambas as bandas são consideradas iguais, podendo-se utilizar qualquer uma das duas. Entretanto o Protocolo A (4 bandas) obteve 79,8% de percentual de passa, apresentando uma taxa de falha elevada (22,2%). CONCLUSÕES: deve-se pesquisar, com o padrão-ouro, todos os protocolos para verificação daquele com melhor sensibilidade e especificidade, apesar de terem apresentado resultados similares entre critérios de passa para 2 ou 3 bandas de frequência.

Early detection of infant hearing loss in the private health care sector of South Africa

OBJECTIVE

A national survey of early hearing detection services was undertaken to describe the demographics, protocols and performance of early hearing detection, referral, follow-up and data management practices in the private health care sector of South Africa.

METHODS

All private hospitals with obstetric units (n=166) in South Africa were surveyed telephonically. This data was incorporated with data collected from self-administered questionnaires subsequently distributed nationally to audiology private practices providing hearing screening at the respective hospitals reporting hearing screening services (n=87). Data was analyzed descriptively to yield national percentages and frequency distributions and possible statistical associations between variables were explored.

RESULTS

Newborn hearing screening was available in 53% of private health care obstetric units in South Africa of which only 14% provided universal screening. Most (81%) of the healthy baby screening programs used only otoacoustic emission screening. Auditory brainstem response screening was employed by 24% of neonatal intensive care unit screening programs with only 16% repeating auditory brainstem response screening during the follow-up screen. Consequently 84% of neonatal intensive care unit hearing screening programs will not identify auditory neuropathy. A referral rate of less than 5% for diagnostic assessments was reported by 80% of universal programs. Follow-up return rates were reported to exceed 70% by only 28% of programs. Using multiple methods of reminding parents did not significantly increase reported follow-up return rates. Data management was mainly paper based with only 10% of programs using an electronic database primarily to manage screening data.

CONCLUSIONS

A shortage of programs and suboptimal and variable protocols for early hearing detection, follow-up and data management in existing programs mean the majority of babies with hearing loss in the South African private health care sector will not be identified early. Newborn hearing screening must be integrated with hospital-based birthing services, ideally with centralized data management and quality control.

Prevalence of auditory changes in newborns in a teaching hospital

Introduction: The precocious diagnosis and the intervention in the deafness are of basic importance in the infantile development. The loss auditory and more prevalent than other joined riots to the birth.

Objective: Esteem the prevalence of auditory alterations in just-born in a hospital school.

Method: Prospective transversal study that evaluated 226 just-been born, been born in a public hospital, between May of 2008 the May of 2009.

Results: Of the 226 screened, 46 (20.4%) had presented absence of emissions, having been directed for the second emission. Of the 26 (56.5%) children who had appeared in the retest, 8 (30.8%) had remained with absence and had been directed to the Otolaryngologist. Five (55.5%) had appeared and had been examined by the doctor. Of these, 3 (75.0%) had presented normal otoscopy, being directed for evaluation of the Evoked Potential Auditory of Brainstem (PEATE). Of the total of studied children, 198 (87.6%) had had presence of emissions in one of the tests and, 2 (0.9%) with deafness diagnosis.

Conclusion: The prevalence of auditory alterations in the studied population was of 0,9%. The study it offers given excellent epidemiologists and it presents the first report on the subject, supplying resulted preliminary future implantation and development of a program of neonatal auditory selection.

Universal newborn hearing screening in 2010

PURPOSE OF REVIEW

The objectives of this review are to provide the reader with a current and concise review of the data and trends in universal newborn hearing screening. Within a relatively short period of time, the concept of screening all infants for hearing loss at the time of birth has evolved from a nascent process to a truly universal system in most developed countries. As a result, the focus and challenges of universal newborn hearing screening have shifted to topics of developing even more efficient and cost-effective approaches, and potentially melding physiologic hearing screenings with ancillary screening techniques.

RECENT FINDINGS

Enhancement of the universal newborn hearing screening process is likely to be accomplished by implementation of novel tools such as wideband reflectance technologies and intelligent incorporation of screening for common genetic and viral causes of congenital hearing loss.

SUMMARY

With such a rapidly evolving process, it will be critical for clinicians to understand the benefits and limitations of various newborn hearing screening methodologies in order to determine the most appropriate management of children referred from their universal newborn hearing screening. This will entail a working knowledge of emerging audiologic tools as well as infectious and genetic causes of pediatric hearing loss.

Adesão a um Programa de Triagem Auditiva Neonatal

A Triagem Auditiva Neonatal tem se efetivado mundialmente como meio para detecção precoce da surdez. Na Unicamp, desde 2002, os recém-nascidos na maternidade do Centro de Atenção Integral à Saúde da Mulher são agendados para a triagem auditiva no Centro de Estudos e Pesquisas em Reabilitação "Prof. Dr. Gabriel Porto". No entanto, nem todos vêm para a triagem e alguns abandonam o processo de avaliação antes do diagnóstico. O objetivo desta pesquisa foi caracterizar as taxas de adesão de lactentes ao Programa de Triagem Auditiva Neonatal. Tratou-se de pesquisa que utilizou dados contidos nos prontuários dos lactentes que efetuaram a triagem no período de fevereiro a novembro de 2007. Permaneceram no alojamento conjunto do CAISM 2107 lactentes e vieram para a triagem 1310. Dentre aqueles que não passaram na triagem (92 lactentes), realizaram o exame de PEATE-A 73 lactentes. A adesão na primeira etapa da triagem foi de 62,17%, e na segunda, 79,34%. As taxas de adesão são inferiores às preconizadas pelo Joint Comittee on Infant Hearing e encontradas em alguns países desenvolvidos. No entanto, aproximam-se de outras experiências brasileiras de programas de triagem auditiva neonatal. O acompanhamento sistemático às famílias dos lactentes que não passaram na primeira avaliação e a conscientização destas sobre a detecção precoce da perda auditiva e suas consequências podem ter contribuído para o aumento da taxa de adesão na segunda etapa da triagem.

Early detection of hearing loss

The universal newborn hearing screening (UNHS) is currently spreading in Germany, as well, even though there can be no talk of a comprehensive establishment. The introduction of UNHS in several federal states such as Hamburg, Hessen, and Schleswig-Holstein can be ascribed to the personal commitment of individual pediatric audiologists. Apart from the procurement of the screening equipment and the training of the staff responsible for the examination of the newborns, the tracking, i.e. the follow-up on children with conspicuous test results, is of utmost importance. This involves significant administration effort and work and is subject to data protection laws that can differ substantially between the various federal states. Among audiologists, there is consensus that within the first three months of a child's life, a hearing loss must be diagnosed and that between the age of 3 and 6 months, the supply of a hearing aid must have been initiated. For this purpose, screening steps 1 (usually a TEOAE measurement) and 2 (AABR testing) need to be conducted in the maternity hospital. The follow-up of step 1 then comprises the repetition of the TEOAE- and AABR measurement for conspicuous children by a specialized physician. The follow-up of step 2 comprises the confirmatory diagnostics in a pediatric audiological center. This always implies BERA diagnostics during spontaneous sleep or under sedation. The subsequent early supply of a hearing aid should generally be conducted by a (pediatric) acoustician specialized on children.

The role of quality improvement in strengthening health systems in developing countries

Quality of care was recognized as a key element for improved health outcomes and efficiency in the World Health Organization's (WHO) widely adopted framework for health system strengthening in resource-poor countries. Although modern approaches to improving quality are increasingly used globally, their adoption remains sporadic in developing countries. Healthcare leaders and improvement experts representing 15 countries met in October 2008 to catalyze the adoption of quality improvement (QI) methods to improve healthcare quality in resource-poor settings. This paper describes the evidence used to frame deliberations, the proceedings and a proposal for incorporating QI methods into plans for strengthening health systems. The conference participants presented case reports and reviewed a growing body of evidence from peer-reviewed journals demonstrating that QI methods can make significant contributions in resource poor settings. Deliberations focused on the barriers to adoption of QI methods and potential strategies for addressing those barriers. Attendees concluded that QI has the potential to optimize the use of limited resources available from governments and global initiatives targeted at achieving shared aims. Demonstrable improvements in quality may encourage greater investment in health systems in developing countries by increasing donor, population and governmental confidence that resources are being used well.

Early hearing detection and intervention in South Africa

Early hearing detection and intervention programs have become the standard of care to ensure optimal outcomes for infants with hearing loss, their families and society at large. The overwhelming majority of infants with congenital or early-onset permanent bilateral hearing loss are however born in developing countries like South Africa where services are scarce and awareness poor. Despite its comparatively well-developed economic and reasonably developed health care infrastructure in sub-Saharan Africa, limited information on infant hearing loss and the status of early hearing detection and intervention has been available for South Africa. Recently however, an increasing number of initiatives and reports have highlighted the extent of infant hearing loss and the status of identification and intervention services offered in the country. This report provides a review of the available evidence on infant hearing loss and the status of current early hearing detection and intervention services in South Africa.

Community-based infant hearing screening in a developing country: parental uptake of follow-up services

Background

Universal newborn hearing screening is now considered an essential public health care for the early detection of disabling life-long childhood hearing impairment globally. However, like any health interventions in early childhood, parental support and participation is essential for achieving satisfactory uptake of services. This study set out to determine maternal/infant socio-demographic factors associated with follow-up compliance in community-based infant hearing screening programmes in a developing country.

Methods

After health educational/counselling sessions, infants attending routine childhood immunisation clinics at four primary care centres were enrolled into a two-stage infant hearing screening programme consisting of a first-stage screening with transient-evoked otoacoustic emissions and second-stage screening with automated auditory brainstem response. Infants referred after the second-stage screening were scheduled for diagnostic evaluation within three months. Maternal and infant factors associated with completion of the hearing screening protocol were determined with multivariable logistic regression analysis.

Results

No mother declined participation during the study period. A total of 285 out of 2,003 eligible infants were referred after the first-stage screening out of which 148 (51.9%) did not return for the second-stage, while 32 (39.0%) of the 82 infants scheduled for diagnostic evaluation defaulted. Mothers who delivered outside hospitals were significantly more likely to return for follow-up screening than those who delivered in hospitals (Odds ratio: 1.62; 95% confidence intervals: 0.98 – 2.70; p = 0.062). No other factors correlated with follow-up compliance for screening and diagnostic services.

Conclusion

Place of delivery was the only factor that correlated albeit marginally with infant hearing screening compliance in this population. The likely influence of issues such as the number of return visits for follow-up services, ineffective tracking system and the prevailing unfavourable cultural perception towards childhood deafness on non-compliance independently or through these factors warrant further investigation.

Telemedicine for audiology screening of infants

Distortion product otoacoustic emissions (DPOAE) and automated auditory brainstem response (AABR) screening were conducted in infants at a distant hospital using remote computing. Eighteen males and twelve females ranging in age from 11-45 days were tested. Both DPOAE and AABR data were recorded using an integrated test system which was connected to the computer network at the Utah Valley Regional Medical Center. Using a broadband Internet connection, an examiner at Utah State University, 200 km away, could control the DPOAE and the ABR equipment. Identical hearing screening results were obtained for face-to-face and telemedicine trials with all infants. The DPOAE means for face-to-face and telemedicine trials were not significantly different at any frequency. In an analysis of variance, there was no significant difference for the test method (F = 0.8, P > 0.05). These results indicate that remote computing is a feasible telemedicine method for providing DPOAE and ABR hearing screening services to infants in rural communities.

Hospital-based universal newborn hearing screening for early detection of permanent congenital hearing loss in Lagos, Nigeria

OBJECTIVE

To determine the feasibility and effectiveness of hospital-based universal newborn hearing screening programme for the early detection of permanent congenital or early-onset hearing loss (PCEHL) in Lagos, Nigeria.

METHODS

A cross-sectional pilot study based on a two-stage universal newborn hearing screening by non-specialist health workers using transient evoked otoacoustic emissions (TEOAE) and automated auditory brainstem-response (AABR) in an inner-city maternity hospital over a consecutive period of 40 weeks. The main outcome measures were the practicality of screening by non-specialist staff with minimal training, functionality of screening instruments in an inner-city environment, screening coverage, referral rate, return rate for diagnosis, yield of PCEHL and average age of PCEHL confirmation.

RESULTS

Universal hearing screening of newborns by non-specialist staff without prior audiological experience is feasible in an inner-city environment in Lagos after a training period of two-weeks. Notwithstanding excessive ambient noise within and outside the wards, it was possible to identify a test site for TEOAE screening within the hospital. The screening coverage was 98.7% (1330/1347) of all eligible newborns and the mean age of screening was 2.6 days. Forty-four babies out of the 1274 who completed the two-stage screening were referred yielding a referral rate of 3.5%. Only 16% (7/44) of babies scheduled for diagnostic evaluation returned and all were confirmed with hearing loss resulting in an incidence of 5.5 (7/1274) per 1000 live births or a programme yield of 5.3 (7/1330) per 1000. Six infants had bilateral hearing loss and the degree was severe (> or =70 dB nHL) in three infants, moderate (40 dB nHL) in one infant and mild (<40 dB nHL) in two infants. The age at diagnosis ranged from 46 days to 360 days and only two infants were diagnosed within 90 days.

CONCLUSIONS

Hospital-based universal hearing screening of newborns before discharge is feasible in Nigeria. Non-specialist staff are valuable in achieving a satisfactory referral rate with a two-stage screening protocol. However, a more efficient tracking and follow-up system is needed to improve the return rate for diagnosis and age of confirmation of hearing loss.

The universal newborn hearing screening program at the University Hospital of Ferrara: focus on costs and software solutions

In the present paper, the authors report the results of the Universal Newborn Hearing Screening (UNHS) project at the University Hospital of Ferrara. A total of 6,759 full-term newborns and a total of 1,016 NICU babies were tested at the University Hospital of Ferrara, from January 2000 to December 2006. The paper presents information from clinically acceptable screening procedures developed and tested during the 6 years of the program and addresses two questions pertinent to hearing screening: (i) the cost-estimate of a UNHS program based on European economical and administration premises and (ii) the development of a database-structure for the evaluation of the UNHS/NHS performance and the individual patient tracking.