Download or read book Otoacoustic Emission Testing in the Early Identification of Noise induced Hearing Loss in South African Mineworkers written by Adele Laura Clark and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study assessed the role of otoacoustic emission screening for the early identification of noise-induced hearing loss in South African mineworkers. Transient otoacoustic emissions and distortion product otoacoustic emissions were recorded in 106 noise exposed mineworkers (212 ears) aged between 20 and 55 years, and in 17 non-exposed novice workers (34 ears) aged between 18 and 29 years. All subjects had normal hearing acuity, otoscopic examinations and immittance measurements. Four otoacoustic emission (OAE) measurements were taken per ear and repeated by a second audiologist for the evaluation of inter-test reliability. Age and number of years of noise exposure was additionally evaluated as well as the specificity and sensitivity of the tests for this population group. In general the OAEs were diminished at four KHz for both the exposed and non-exposed groups. Age was found to be the primary predictor of diminished OAE tracings. Poor inter-test reliability was obtained. These results indicate that further research is required within this population group before OAE testing can be implemented for screening for noise-induced hearing loss.
Download or read book Measurement of Distortion Product Otoacoustic Emissions in South African Gold Miners at Risk for Noise induced Hearing Loss written by Anita Lynne Edwards and published by . This book was released on 2009 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Occupational noise induced hearing loss written by Katijah Khoza-Shangase and published by AOSIS. This book was released on 2023-03-01 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the well-documented understanding of occupational noise-induced hearing loss (ONIHL) being a complex occupational health condition requiring the adoption of the complex interventions approach to management, challenges confronting hearing conservation programmes (HCPs) within the African context need clear characterisation and insightful deliberation. Guided by the systems theory, to be realistic about the implementation, monitoring, as well as evaluation of outcomes of HCPs within the African mining context, this book is a call for a paradigm shift in the assessment and management of ONIHL and HCPs in African mines. This book, Occupational Noise Induced Hearing Loss: An African Perspective, equips researchers involved in the management of ONIHL and implementation of HCPs with evidence that allows for contextually relevant best practices in mine settings, particularly those located in low-and-middle-income countries (LMICs). This best practice is multidisciplinary in nature and engages all stakeholders in all relevant sectors, with the goal of adopting a preventive audiology approach to ONIHL rather than the compensation-oriented approach that is currently prevailing. This book is a research-driven contribution to the occupational health and safety (OHS) space, with ONIHL as a focus case study, and it provides contemporary, contextually relevant, and responsive evidence related to ONIHL and HCPs in LMICs with a very specific focus on the South African context. This book expansively addresses all aspects of ONIHL and HCPs in one volume, with careful considerations of complexities and challenges to HCPs implementation, applicable specifically to LMICs, although useful globally. The book offers potential solutions and recommendations for all challenges identified, having carefully and deliberately engaged with local evidence, local context, and local policies and regulations to ensure an Afrocentric contribution to the world of evidence.
Download or read book The Clinical Value of Auditory Steady State Responses in the Audiological Assessment of Pseudohypacusic Workers with Noise induced Hearing Loss in the South African Mining Industry written by Elizabeth De Koker and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Large numbers of South African mine workers incur noise-induced hearing loss. The prevalence of noise-induced hearing loss is such that its financial implications for the industry are significant. This situation is often further compounded by an exaggeration of their hearing loss by some workers in an attempt to obtain compensation. Questionable cases must be re-assessed, increasing the cost of evaluations and the number of unproductive shifts. The inability to obtain true pure-tone thresholds in unco-operative workers leads to ineffectiveness in and frustration for audiologists and occupational health centres because they are not delivering an accountable service to the mining company and individual workers. The failure to obtain pure-tone thresholds may also lead to deserving workers not receiving compensation, and sudden hearing loss not being diagnosed. Workers unfit for their present occupations can also be further exposed to noise. Current audiological procedures can identify instances of exaggerated hearing loss (pseudohypacusis), but do not quantify the extent of exaggeration. Traditional testing techniques require patient co-operation and, hence, are insufficient to resolve cases where patient co-operation is not forthcoming. As a result this study was undertaken to determine the value of auditory steady state responses (ASSRs) as a means of estimating the pure-tone thresholds of noise-exposed workers. ASSRs need no response from the patient, and the electrical responses to the presented sound are measured by means of a real-time statistical analysis of the samples, using a computer, thereby offering real objectivity. The following research question was addressed: What is the clinical value of ASSRs in the audiological assessment of pseudohypacusic workers with noise-induced hearing loss? An experimental study was conducted, where different protocols and types of equipment used in the testing of ASSRs were evaluated in a group of min workers with noise-induced hearing loss (n=81). The influence of sedation on the threshold estimation was also evaluated. The proven best protocol was finally evaluated in a pseudohypacusic group of workers (n=29). The study indicates that ASSRs are a valid and accurate alternative to pure-tone testing in populations with noise-induced hearing loss. The test can serve as a once-off test procedure for an unco-operative client. The mean threshold estimates of ASSRs never differed more than 10 dB from the mean pure-tone thresholds. The test procedure was accurate throughout the severity range of hearing loss, and age did not influence the reliability of the threshold estimates. Single-frequency techniques were found to be the technique of choice in this population and it is recommended that the 40 Hz response is employed as a modulation frequency. Sedation did not have any effect on the length and the sensitivity of the procedure, and is thus not advocated if co-operation can be obtained. The length of the procedure is estimated at 60 minutes. Finally, this study has contributed to the validation of the technique (previous research was limited). As a result of this study, the implementation of this procedure in mines' audiological centres is advocated since it has been proven to be of clinical value.
Download or read book Can Otoacoustic Emission Help in the Differencial Diagnosis of Occupational Noise induced Hearing Loss written by M Sliwinska-Kowalska and published by . This book was released on 1998 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Feasibility of Including Distortion Product Otoacoustic Emissions DPOAEs in the Annual Medical Surveillance Test Battery for the Identification of Noise induced Hearing Loss in a Group of Workers in a Beverage Manufacturing Industry written by Tarryn Marisca Reddy and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel Methods for Early Identification of Noise Induced Hearing Loss written by M. E. Lutman and published by . This book was released on 2000 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report aims to compare various methods that might be used to monitor cochlear function in people exposed to noise, with particular emphasis on new techniques that involve the recording of otoacoustic emissions.
Download or read book Noise induced Hearing Loss written by Susan Strauss and published by . This book was released on 2012 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Basis of Noise induced Hearing Loss written by Alf Axelsson and published by . This book was released on 1996 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Knowledge and Attitudes of a Group of South African Mine Workers Towards Noise Induced Hearing Loss and the Use of Hearing Protective Devices written by E. M. Kahan and published by . This book was released on 1994 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of Noise Induced Hearing Loss of Mine Workers written by Patience Chendume and published by . This book was released on 2021 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Clinical Value of Immittance Testing in the Identification of Middle Ear Pathology in South African Mineworkers written by Amanda Habig and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to determine the clinical value of immittance testing in the identification of middle ear pathology among South African mineworkers. Case histories, pure tone audiometric screening, otoscopy, tympanometry and acoustic reflex testing were administered to 177 workers at Harmony gold mine in Randfontein, South Africa, within the context of the mine's programme of medical surveillance for noise exposure. Middle ear pathology was identified on the basis of a proposed middle ear screening protocol, which included medical history-taking, otoscopic examination, pure tone audiometry and immittance testing. A high prevalence of abnormal middle ear results was identified by immittance testing in the population of mineworkers. More than half of the population was positively identified with potential middle ear pathology. The present study found that mineworkers who smoke or are subjected to second-hand smoke have higher incidence of abnormal outer and middle ear results. Otoscopic findings indicated that retracted tympanic membranes were the most common type of middle ear pathology among those identified, followed by scar tissue the tympanic membrane or an inflamed tympanic membrane, and dull tympanic membranes, all of which correlated with the findings of immittance testing. A review of medical history should include information on any pathology indicating previous barotrauma. Screening for hearing disorders forms an essential part of medical surveillance in the deep mining industry. Mine medical staff was often found to be unfamiliar with middle ear barotrauma, which may influence decisions on referral and further assessment of barotrauma-susceptible individuals. The risk of barotrauma during vertical conveyance increases greatly where middle ear pathology is present, but it was found that mineworkers are not excluded from underground work where middle ear pathology is present, thereby exposing them to the risk of barotrauma. Mineworkers should be counseled regarding the consequences of middle ear pathology, and be encouraged to report problems, e.g. pain, suspected ear infection or tympanic membrane perforation, which they presently fail to do. A greater prevalence of middle ear pathology was identified among subjects screened with the proposed immittance testing protocol than was found by conventional screening methods. The existing and proposed screening protocols used during the study are detailed and discussed, to evaluate findings and identify possible reasons for the differing prevalence of middle ear pathology determined by the two different screening methods.
Download or read book Efficacy of a Community based Infant Hearing Screening Program in the Western Cape written by Niki Friderichs and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Apart from isolated programs in private and public health care sectors, South Africa has no existing systematic public infant hearing screening program at community level. As a result, early identification of hearing loss is certainly not being attained for the majority of infants in South Africa with far-reaching effects for individuals, families and society at large. Screening programs at primary health care immunization clinics have been proposed as an alternative to hospital-based programs in South Africa. The objective of this study was to evaluate the first systematic community-based infant hearing screening program in a developing South African community in the Western Cape. A combined descriptive and exploratory research methodology was followed incorporating aspects of a program evaluation design. The study was of a quantitative nature and the required data were collected by means of a questionnaire and OAE testing conducted by clinic nurses on subjects. A community-based universal infant hearing screening program initiated at eight primary health care clinics in the Cape Metropolitan area was evaluated over a 19-month research period. During this time 6227 infants who were candidates for screening attended their 6, 10 or 14-week immunization visit at the relevant clinic. Clinic nurses were trained as screening personnel. A two-stage distortion product otoacoustic emissions screening protocol was utilized. The target disorder for this study was bilateral permanent congenital and early onset hearing loss and infants referring the first screen were scheduled for a 4-week follow-up visit at the clinic. Diagnostic audiological and medical evaluations were scheduled at referral hospitals when indicated. The study evaluated the efficacy of the program based on coverage, referral and follow-up rates and diagnostic outcomes according to guidelines specified by the Health Professions Council of South Africa 2007 Position Statement. Overall coverage rate across the eight clinics was 32.4% with 2018 infants (aged 0- 14 weeks) screened. The mean age of the sample at first stage screen was 3.9 weeks of age and 13.5 weeks of age for first hospital visit. Overall first stage screen referral rate was 9.5% with 62 subjects (3%) referred for diagnostic services at hospital level after a follow-up screen. The average follow-up rate for rescreens at clinic level was 85.1% and for initial diagnostic assessments at hospital level it was 91.8%. Although minimal hearing loss was not the primary focus of the screening program the outcomes did include those subjects with fluctuating conductive hearing loss and permanent unilateral hearing loss. Prevalence rates were 4.5/1000 with significant hearing loss, including sensorineural (1.5/1000) and conductive (3/1000) losses, and 12.9/1000 for subjects with middle ear effusion.p- The community-based infant hearing screening program was valuable in attaining high follow-up return rates but reaching sufficient coverage may require dedicated screening personnel as opposed to existing nursing personnel. Furthermore, consideration of an alternative community-based platform such as midwife obstetric units may improve coverage and referral rates and prevalence of permanent congenital and early onset hearing loss.
Download or read book Occupational Noise induced Hearing Loss written by Katijah Khoza-Shangase and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the well-documented understanding of occupational noise-induced hearing loss (ONIHL) being a complex occupational health condition requiring the adoption of the complex interventions approach to management, challenges confronting hearing conservation programs (HCPs) within the African context need clear characterization and insightful deliberation. Guided by the systems theory, to be realistic about the implementation, monitoring, as well as evaluation of outcomes of HCPs within the African mining context, this book is a call for a paradigm shift in the assessment and management of ONIHL and HCPs in African mines . This book, Occupational Noise Induced Hearing Loss: An African Perspective, Teams researchers involved in the management of ONIHL and implementation of HCPs with evidence that allows for contextually relevant best practices in mine settings, particularly those located in low-and-middle-income countries (LMICs). This best practice is multidisciplinary in nature and engages all stakeholders in all relevant sectors, with the goal of adopting a preventive audiology approach to ONIHL rather than the compensation-oriented approach that is currently prevailing. This book is a research-driven contribution to the occupational health and safety (OHS) space, with ONIHL as a focus case study, and it provides contemporary, contextually relevant, and responsive evidence related to ONIHL and HCPs in LMICs with a very specific focus. in the South African context. This book expansively addresses all aspects of ONIHL and HCPs in one volume, with careful considerations of complexities and challenges to HCPs implementation, applicable specifically to LMICs, although useful globally. The book offers potential solutions and recommendations for all challenges identified, having carefully and deliberately engaged with local evidence, local context, and local policies and regulations to ensure an Afrocentric contribution to the world of evidence.
Download or read book THE EFFICACY OF EVOKED OTOACOUSTIC EMISSIONS IN IDENTIFYING HEARING LOSS IN CHILDREN WITH DEVELOPMENTAL DISABILITIES ED401683 UNITED S written by United States. Office of Educational Research and Improvement and published by . This book was released on 1997* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Otoacoustic emission assessment of ear damage in coal mine workers written by and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characteristics of Noise Induced Hearing Loss in Gold Miners written by Anita Edwards and published by . This book was released on 2002* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
