Biomedical subjects

S L Wirz

Publications and source records attributed to S L Wirz.

13 recordsLinked to original sources

PubMed2006

Ethical issues in screening for hearing impairment in newborns in developing countries.

Screening of newborns for permanent congenital or early-onset hearing impairment has emerged as an essential component of neonatal care in developed countries, following favourable outcomes from early intervention in the critical period for optimal speech and language development. Progress towards a similar programme in developing countries, where most of the world's children with hearing impairment reside, may be impeded by reservations about the available level of support services and the possible effect of the prevailing healthcare challenges. Ethical justification for the systematic introduction of screening programmes for hearing in newborns based on the limitations in current primary prevention strategies, lack of credible alternative early-detection strategies and the incentives for capacity-building for the requisite support services is examined.

Cost-Benefit Analysis↗

PubMed2005

Maternal views on infant hearing loss in a developing country.

BACKGROUND: Parental support for infant hearing loss is essential for a successful infant screening programme. However, in developing countries where unfavourable customs and beliefs towards childhood disabilities have been reported, parental support towards infant screening is uncertain and there is presently no published evidence on the subject. OBJECTIVE: To elicit the views of mothers and would-be mothers in order to ascertain their knowledge on infant hearing loss and their attitudes towards infant hearing screening. METHODS: A structured questionnaire consisting of 15 questions was administered to 101 mothers (mean age 31.6+/-7.3 years, range: 21-55 years) attending two community hospitals in Lagos, Nigeria. The responses were evaluated by descriptive statistics, factor analysis of the principal components and multiple regression analysis. The reliability of the two main domains (knowledge and attitude) was tested for internal consistency by Cronbach's alpha coefficient. RESULTS: Maternal knowledge was highest for measles (73%; mean score 2.54) and ear discharge (73%; mean score 2.51) but low for birth asphyxia (37%; mean score 1.90), traditional medicine (42%; mean score 2.03) and jaundice (47%; mean score 2.09) as causes of hearing loss. Attitude towards neonatal screening was positive in majority of mothers (92%; mean score 2.84) and there was a high acceptance of hearing aids as an early intervention option (84%; mean score 2.70). Five factors (eigenvalue>1) were extracted after principal component analysis with the attitude variables loading highly and exclusively on one factor. Age was the only demographic variable that was associated with a domain (knowledge) after multiple regression analysis. The component scales for the two domains were highly internally consistent (alpha coefficients of 0.84 and 0.83). CONCLUSIONS: Contrary to the concerns often expressed about parental support for infant hearing screening programmes in developing countries, this study suggests that current parental knowledge and attitude favour early detection and intervention of childhood hearing impairment.

Adult↗

PubMed2005

Screening for early childhood hearing loss in Nigeria.

Newborn hearing screening has been recognized as an essential component of public health care in early childhood in developed countries. However, such screening is yet to be widely embraced in the developing world. The new national health policy in Nigeria seeks, for the first time, to reduce the impact of permanent hearing loss on early childhood development through early detection and timely intervention services. The aim of this paper is to ascertain if newborn hearing screening satisfies the conventional criteria for a screening programme as an early detection strategy in this developing country. A review of the available literature shows that permanent childhood hearing loss is a significant health condition and its detection through screening with oto-acoustic emissions and/or auditory brainstem response is feasible in the target population. Amplification with hearing aids is an effective and preferred option for early intervention by parents. The risk of maternal anxiety from potential false-positives or the psychological cost of false assurance from false-negatives is unlikely to outweigh the benefit of screening. Newborn hearing screening is therefore a potential early detection strategy for permanent childhood hearing loss in Nigeria.

Child↗

PubMed2004

Benefits and challenges of newborn hearing screening for developing countries.

The late detection of permanent congenital and early-onset hearing loss (PCEHL) often has severe effects on linguistic, speech, cognitive and educational development in affected children. Since newborn hearing screening (NHS) allows most PCEHL to be detected early enough for optimal intervention, the prospects of its introduction in the developing world are reviewed in this paper. It is observed that a simple generalisation on the feasibility of NHS for the developing countries seems inappropriate in view of the diversities in the health and socio-economic status of these countries and the recent favourable reports of universal newborn hearing screening from the region. NHS empowers parents to make timely choices that will allow their hearing impaired children to be given a good start in life and be fully integrated into the wider community. It also compels attention towards the development of essential hearing healthcare services, besides the specific documented benefits. Existing child-healthcare structures such as the expanded programme on immunisation (EPI), baby friendly hospital initiatives (BFHI) and integrated management of childhood illness (IMCI) provide opportunities for the introduction of some form of NHS in many of these countries where routine or systematic childhood hearing screening does not exist. Limited funding, manpower shortages, inadequate support services, low public awareness and the uncertainty regarding the commitment from healthcare practitioners may present some challenges but these are not insurmountable. Pilot studies are necessary in each country to provide empirical data that will guide healthcare providers who wish to introduce such a programme at any level of healthcare delivery.

Audiometry↗

PubMed2004

Infant hearing screening: route to informed choice.

The decision to participate in infant screening often rests with parents. Medical ethics require that parental decision is elicited from informed choice. Such a decision is influenced by the parental knowledge and attitude towards screening and a careful evaluation of these factors is essential in seeking informed consent for infant hearing screening.

Decision Making↗

PubMed2003

Comparison of armspan, arm length and tibia length as predictors of actual height of disabled and nondisabled children in Dharavi, Mumbai, India.

OBJECTIVES: To investigate appropriate measurements to predict height in children with physical impairments to facilitate the accurate assessment of nutritional status in field studies. DESIGN: Case-control cross-sectional study. SETTING: Dharavi, a large slum in Mumbai, India. SUBJECTS: In total, 141 children with mixed disabilities and 162 nondisabled control children, aged 2-6 y. METHODS: Height/length, armspan, arm length and tibia length were measured to the nearest 0.1 cm using standard procedures. The relations between armspan, arm length and tibia length with height in controls were investigated using linear regression. RESULTS: Armspan (R(2)=0.93, P<0.001, n=158), arm length (R(2)=0.81, P<0.001, n=162) and tibia length (R(2)=0.72, P<0.001, n=161) were found to be strong predictors of height based on data from nondisabled control children. These measurements could be used to determine a more accurate height for children with physical impairments where the nature of the impairment may interfere with height measurements. CONCLUSIONS: Armspan, arm length and tibia length can be used to determine accurate height for children with physical impairments, for example, children with a nonambulatory status or those with kyphosis or scoliosis of the spine.

Anthropometry↗

PubMed2002

Some ethical issues in community-based rehabilitation initiatives in developing countries.

PURPOSE: This commentary provides both theoretical and practical insights into the concept of community-based rehabilitation (CBR) and its application in developing countries. In doing so it explores current practices in CBR and the debate surrounding them, namely the ethical question and how this may impact on future CBR. The main argument in this account is that disability is a development issue; with widespread poverty, inequality and violation of human rights, and should be addressed within the broader context of community development which may include strategies such as CBR. METHOD: A review and analysis of recent literature on CBR has been conducted including the review of a number of empirical research documents from various CBR initiatives in developing countries. RESULTS: CBR has increasingly been under scrutiny in terms of the extent to which these have succeeded in delivering rehabilitation services to those in need in the community as well as the permitted level of participation and control of disabled people over the rehabilitation process. Many programmes have been unsustainable and it has been difficult to evaluate their full usefulness to disabled people. These issues raise an ethical question about CBR being an appropriate strategy for the rehabilitation of people with impairments in developing countries. CONCLUSION: This background emphasizes that new directions in CBR need to be put in place in order to maximize the realization of the ultimate goal: the greatest participation for disabled people in all spheres of life. Effective rehabilitation programmes should allow people with disability to have greater control in the nature of their rehabilitation and that the role of professionals and other stakeholders is one of allies and resources in the rehabilitation process. Moreover, the participation of community members in the rehabilitation policy should be assured.

Adult↗

PubMed1998

The use of non-specialist personnel in providing a service for children disabled by hearing impairment.

PURPOSE: This paper addresses the issue of how to provide health services for hearing-impaired children in the developed world. Most children live in developing countries, with no access to audiological or therapy services. METHOD: The paper reviews the prevalence of hearing impairment in developing countries and stresses the need to examine the details not only of the hearing impairment but also of the disabling consequences of hearing loss, especially in the developing world where the provision of hearing aids (or other amplification) is a financial and/or logistical impossibility for most children. RESULTS: Institutional services in developing countries achieve very low coverage rates. CONCLUSIONS: Community-based rehabilitation (CBR) reaches disabled children more effectively, and the final part of the paper suggests ways in which CBR workers can assist hearing-impaired children.

Child↗

PubMed1981