... degree of hearing loss. There is a strong relationship between age and reported hearing loss: 18 percent of American ... loss, presbycusis, comes on gradually as a person ages. Presbycusis can occur because of changes in the ... commonly affects people over 50, many of whom are likely ...
... and how often you are exposed to loud music Headphone use Family history of hearing loss Jobs or activities that increase your chance of hearing loss from music are: Being a musician, sound crew member, or ...
... pathologists to help them develop their hearing and speaking skills. Some people with hearing loss may need to use special techniques like these to communicate: speechreading, which ... without speaking Cued Speech and Signed Exact English, which use ...
... Products Programs Contact NIOSH NOISE AND HEARING LOSS PREVENTION Recommend on Facebook Tweet Share Compartir Occupational hearing ... Facts and Statistics Publications and Tools Hearing Loss Prevention National Goals, Policies, and Standards Features Noise in ...
Jaiswal, S. K.
122 cases of fluctuant hearing loss were studied. Serous otitis media was commonest followed by Meniere’s disease, Acoustic neuroma, fistula of round and oval window, oto-mandibular syndrome, Congenital cholesteatoma and maxillary sinusitis. Cases of Arachnoid cyst, Multiple sclerosis, abnormalities of base of skull and craniocervical region and cervical rib causing fluctuant hearing loss could not be detected. Aetio pathophysiology of all discussed.
Kenna, Margaret A
Hearing loss is the most common congenital sensory impairment. According to National Health and Nutrition Examination Survey data from 2001 to 2008, 20.3% of subjects aged greater than or equal to 12 had unilateral or bilateral hearing loss. The World Health Organization notes that, worldwide, there are 360 million people with disabling hearing loss, with 50% preventable. Although many hearing losses are acquired, many others are manifestations of preexisting conditions. The purpose of a pediatric hearing evaluation is to identify the degree and type of hearing loss and etiology and to outline a comprehensive strategy that supports language and social development and communication. PMID:26452421
... genes and loud noise (from rock concerts or music headphones) may play a large role. The following factors contribute to age-related hearing loss: Family history (age-related hearing loss tends to run in ...
The objective of the study was to examine the aetiology of sensorineural hearing loss (SNHL) in a paediatric population presenting to the National Centre of Medical Genetics. A retrospective chart review from 1998 to 2006. One hundred and twenty nine children were investigated for SNHL. The average age of diagnosis of hearing loss was 36 months. The degree of hearing loss was mild in 8 children, moderate in 33 children, severe in 31 children and profound in 57 children. Eighty-five children (66%) were diagnosed with a hereditary hearing loss, 11 (8%) children had an acquired hearing loss and no cause found in 33 (26%) children. This is the first report of the causes of hearing loss in Irish children. The mean age of diagnosis in our cohort is high and emphasises the need for a neonatal screening programme. There remains a number of children for whom the cause of hearing loss remains unknown.
Katbamna, Bharti; Flamme, Gregory A
Studies on prevalence of acquired hearing loss across the life span have shown a trend of increase in hearing loss with age. A parallel decline in age of recreational use of loud music and cigarette smoking suggests that these early listening and recreational habits may be major contributing factors to the chronic hearing disability seen in later years. In recognition of these new recreational patterns of adolescents and young adults, Healthy People 2010 has issued a list of objectives for prevention of noise-induced hearing loss and smoking in adolescents and young adults through early education and intervention. In this article, the authors describe the effects of noise- and music-induced and smoking-induced hearing loss and provide guidelines for early identification and hearing conservation. Such an early approach to identification and conservation should ultimately help reduce hearing loss prevalence rates in adults. PMID:19041465
Kim, Kyoo Sang
In this article, current status of noise exposure in workplaces, trend of workers with noise-induced hearing loss (NIHL), and prevalence of NIHL in workers by industry and job category in Korea were reviewed. In addition, trends of research on the audiological effects such as hearing loss from noise and occupational hearing loss from non-noise in Korea were addressed through reports in industrial audiology. Though noise exposure level has improved, noise still shows the highest rate of cases ...
Ashok Murthy, V.; Mohan Kumar, J.
To find out the association between rheumatoid factor and hearing loss, a prospective study was conducted at Tertiary care/Medical college hospital. We screened 85 patients with positive rheumatoid factor for evidence of hearing loss. These patients were collected from the Departments of Medicine and Orthopedics. Out of 85 patients, who were positive for rheumatoid factor, underwent screening for hearing loss. These patients had a normal pure tone audiogram but Distortion product otoacoustic ...
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. PMID:22073092
Full Text Available 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 nurses of the Medical Service would like invite all persons working on the CERN site to take part in a: HEARING LOSS DETECTION WEEK From 28 August to 1st September 2006 At the Infirmary, Building 57 from 9 a.m. to 4 p.m. Hearing tests - advice - information - documentation - protective equipment
Mondelli, Maria Fernanda Capoani Garcia
Objective: To verify the relationship between systemic arterial hypertension (SAH) and hearing loss in middle-aged patient. Method: This study was carried out in the period from January to December 2007. The research was composed by 392 patients of both genders, aged from 45 to 60 years old. Anamnesis and threshold tonal audiometry data were analyzed. Results: There was a significant association between SAH and hearing loss. Conclusion: The results showed an evident association between SAH an...
... was created to conduct and support research and research training in the processes of hearing, balance, smell, taste, voice, speech, and language. Nora Woodruff, daughter of ABC newsman Bob Woodruff ...
Alexopoulos, Evangelos C.; Tsouvaltzidou, Thomaella
Background: Noise-induced hearing loss (NIHL) is one of the most prevalent occupational illnesses, with a higher incidence in the heavy industry. Objectives of the Study: The aim of this study is to investigate the prevalence of NIHL in Greece and explore its correlations with other job and individual-related factors. Materials and Methods: Questionnaires were administered, and audiograms were conducted to 757 employees of a shipyard company in Greece, both white- and blue-collar, during the period 2006–2009. A modification of the 1979' equation of the American Academy of Otolaryngology was used to calculate hearing loss. Statistical analysis was conducted by means of the SPSS v. 17. Results: A 27.1% of the employees were hearing handicap. Hearing loss was correlated with age, past medical history of ear disease (Meniere's disease, acoustic neuroma, otosclerosis) or injury, hyperlipidemia, job title and level of education. A few questions on subjective hearing ability and symptoms showed strong discriminatory power of hearing pathology. Conclusions: The results of this study emphasize the burden of disease in the shipyard industry, and the need for continuous monitoring, implementation of preventive measures and hearing conservation programs. PMID:26023266
Koffler, Tal; Ushakov, Kathy; Avraham, Karen B
Hearing loss (HL) is one of the most common birth defects in developed countries and is a diverse pathologic condition with different classifications. One of these is based on the association with other clinical features, defined as syndromic hearing loss (SHL). Determining the cause of the HL in these patients is extremely beneficial as it enables a personalized approach to caring for the individual. Early screening can further aid in optimal rehabilitation for a child's development and growth. The advancement of high-throughput sequencing technology is facilitating rapid and low-cost diagnostics for patients with SHL. PMID:26443487
Chang, Kay W
Eighty percent of nonsyndromic hearing losses are caused by autosomal-recessive (AR) inheritance, while most of the other 20% are caused by autosomal-dominant (AD) inheritance. Although AR nonsyndromic SNHL is most commonly caused by GJB2 and SLC26A4, there is no single gene that accounts for any significant proportion of AD SNHL. High-throughput sequencing techniques, also called next-generation sequencing (NGS) or massively parallel sequencing (MPS), may allow for routine definitive diagnosis of all possible genetic causes for hearing loss in the not-too-distant future. PMID:26275501
... Issues Listen Español Text Size Email Print Share Acoustic Trauma - Hearing Loss in Teenagers Article Body All ... temporary or permanent hearing loss. This is called acoustic trauma. How loud is 85 decibels? Surprisingly, not ...
Warner-Czyz, Andrea D; Loy, Betty A; Evans, Christine; Wetsel, Ashton; Tobey, Emily A
Children with hearing loss are at risk for lower self-esteem due to differences from hearing peers relative to communication skills, physical appearance, and social maturity. This study examines the influence of generic factors unrelated to hearing loss (e.g., age, gender, temperament) and specific factors associated with hearing loss (e.g., age at identification, communication skills) on how children with hearing loss wearing cochlear implants or hearing aids appraise self-esteem. Fifty children with hearing loss wearing cochlear implants or hearing aids participated (Mean age: 12.88 years; mean duration of device use: 3.43 years). Participants independently completed online questionnaires to assess communication skills, social engagement, self-esteem, and temperament. Children with hearing loss rated global self-esteem significantly more positively than hearing peers, t?=?2.38, p?=?.02. Self-esteem ratings attained significant positive correlations with affiliation (r?=?.42, p?=?.002) and attention (r?=?.45, p?=?.001) temperaments and a significant negative association with depressive mood (r?=?-?.60, p?self-esteem and demographic factors, communication skills, or social engagement. Because successful communication abilities do not always co-occur with excellent quality of life, clinicians and professionals working with children with hearing loss need to understand components contributing to self-esteem to improve identification, counseling, and external referrals for children in this population. PMID:25755025
Mehrparvar, Amir Houshang; Davari, Mohammad Hossein
Carbon monoxide poisoning is one of the rare causes of hearing loss which may cause reversible or irreversible, unilateral or bilateral hearing loss after acute or chronic exposure. In this report, we present a case of bilateral sensorineural hearing loss in a secondary smelting workshop worker after an acute exposure to carbon monoxide. This complication was diagnosed by pure-tone audiometry and confirmed by transient evoked otoacoustic emissions. Hearing loss has not improved after 3 months of followup.
Mehrparvar, Amir Houshang; Davari, Mohammad Hossein; Mollasadeghi, Abolfazl; Vahidi, Mohammad Reza; Mostaghaci, Mehrdad; Bahaloo, Maryam; Shokouh, Pedram
Carbon monoxide poisoning is one of the rare causes of hearing loss which may cause reversible or irreversible, unilateral or bilateral hearing loss after acute or chronic exposure. In this report, we present a case of bilateral sensorineural hearing loss in a secondary smelting workshop worker after an acute exposure to carbon monoxide. This complication was diagnosed by pure-tone audiometry and confirmed by transient evoked otoacoustic emissions. Hearing loss has not improved after 3 months of...
Sliwinska-Kowalska, Mariola; Davis, Adrian
Noise-induced hearing loss (NIHL) still remains a problem in developed countries, despite reduced occupational noise exposure, strict standards for hearing protection and extensive public health awareness campaigns. Therefore NIHL continues to be the focus of noise research activities. This paper summarizes progress achieved recently in our knowledge of NIHL. It includes papers published between the years 2008-2011 (in English), which were identified by a literature search of accessible medical and other relevant databases. A substantial part of this research has been concerned with the risk of NIHL in the entertainment sector, particularly in professional, orchestral musicians. There are also constant concerns regarding noise exposure and hearing risk in "hard to control" occupations, such as farming and construction work. Although occupational noise has decreased since the early 1980s, the number of young people subject to social noise exposure has tripled. If the exposure limits from the Noise at Work Regulations are applied, discotheque music, rock concerts, as well as music from personal music players are associated with the risk of hearing loss in teenagers and young adults. Several recent research studies have increased the understanding of the pathomechanisms of acoustic trauma, the genetics of NIHL, as well as possible dietary and pharmacologic otoprotection in acoustic trauma. The results of these studies are very promising and offer grounds to expect that targeted therapies might help prevent the loss of sensory hair cells and protect the hearing of noise-exposed individuals. These studies emphasize the need to launch an improved noise exposure policy for hearing protection along with developing more efficient norms of NIHL risk assessment. PMID:23257577
Smith, Michael E
Exposure to intense sound or ototoxic chemicals can damage the auditory hair cells of vertebrates, resulting in hearing loss. Although the relationship between such hair cell damage and auditory function is fairly established for terrestrial vertebrates, there are limited data available to understand this relationship in fishes. Although investigators have measured either the morphological damage of the inner ear or the functional deficits in the hearing of fishes, very few have directly measured both in an attempt to find a relationship between the two. Those studies that have examined both auditory hair cell damage in the inner ear and the resulting hearing loss in fishes are reviewed here. In general, there is a significant linear relationship between the number of hair cells lost and the severity of hearing threshold shifts, although this varies between species and different hair cell-damaging stimuli. After trauma to the fish ear, auditory hair cells are able to regenerate to control level densities. With this regeneration also comes a restoration of hearing. Thus there is also a significant relationship between hair cell recovery and hearing recovery in fishes. PMID:26611069
Full Text Available Aim of the Study: The aim of our study was to compare the impact of hearing loss in the life of adults who had congenital hearing loss with that of adults with acquired adult onset hearing loss (auditory neuropathy. Methodology: The quality of life scale questionnaire was administered on two groups. One group consisted of 10 adults with prelingual bilateral severe to profound hearing loss identified before the age of 3 years and who were using hearing aids and had received regular intervention for speech and language development by a qualified speech language pathologist. Second group consisted of 10 adults with auditory neuropathy. Results and Discussion: Wilcoxon rank sum test was used to compare the domains across the groups and the gender distributions between two groups were analyzed using Fisher?s exact test. The results revealed that differences between the adults with early-onset hearing loss and late onset hearing loss was statistically significant for most of the domains. The results indicated the fact that accepting a hearing loss during adulthood leads to more psychological trauma than adjusting and living with the hearing loss from the early years of life. Loss of hearing is quite traumatic to adults. Psychological trauma that they undergo is as important as their physiological problem and psychological referral to a clinical psychologist may be beneficial to many of them.
Kravitz, L; Selekman, J
At some point in their career, nurses will care for a child with a hearing loss. Understanding how to work best with these children necessitates an in-depth knowledge of how the hearing loss impacts both the child and family. Each component is interrelated. Knowing, for example, that the child has a profound sensorineural hearing loss tells the nurse much about the child's potential prognosis for improvement, use of amplification, communication style, and parental and family stress. While many variables impact on these basic features, they set the foundation for a deeper understanding and the formation of a stronger, trusting bond between the nurse and patient. As in all professional fields, issues related to deafness continue to change. There are new and improved forms of amplification as well as various effective communication methodologies. Most importantly, there is a change in attitude. The deaf do not view themselves as disabled. Instead they have a sense of pride in sharing a culture and a common language. Through this understanding, respect for one another can be achieved. PMID:1470492
Trapp Petty, Melissa A.
For hearing parents, receiving a hearing loss diagnosis for their child can be a shocking event. For some parents, the diagnosis is the fulfillment of a hunch; confirmation of the suspected, but still scary verdict. Recent research finds that the period directly after hearing loss diagnosis is the most stressful and burdensome for parents,…
Toppila, Esko; Koskinen, Heli; Pyykkö, Ilmari
This study intended to evaluate classical musicians' risk of hearing loss. We studied 63 musicians from four Helsinki classical orchestras. We measured their hearing loss with an audiometer, found their prior amount of exposure to sound and some individual susceptibility factors with a questionnaire, measured their present sound exposure with dosimeters, and tested their blood pressure and cholesterol levels, then compared their hearing loss to ISO 1999-1990's predictions. The musicians' hearing loss distribution corresponded to that of the general population, but highly exposed musicians had greater hearing loss at frequencies over 3 kHz than less-exposed ones. Their individual susceptibility factors were low. Music deteriorates hearing, but by less than what ISO 1999-1990 predicted. The low number of individual susceptibility factors explained the difference, but only reduced hearing loss and not the prevalence of tinnitus. PMID:21173486
Mourtou, Eleni; Meis, Markus
This chapter provides background information for researchers who wish to become familiar with some basic medical and audiological aspects of hearing loss and the technology of hearing aids. It introduces (1) the disciplines involved in research on hearing loss, (2) the medical categories of hearing loss and their various effects on communication, (3) the different degrees of hearing loss as defined by different national and international organizations, (4) statistics on the preva- lence of heari...
Jerram, J C; Purdy, S C
This study examined the influence of technology, demographic factors, and prefitting expectations, attitudes, and adjustment to hearing loss on hearing aid outcome. Clients obtaining new hearing aids completed questionnaires measuring personal adjustment to hearing loss, expectations of and attitudes toward hearing aids, and hearing aid benefit. Eighty-one percent of the 200 subjects completing the prefitting questionnaires returned questionnaires evaluating hearing aid outcome. Factors affecting hearing aid use, overall satisfaction, and benefit were investigated using regression analyses. Higher use time was associated with higher prefitting expectations and greater acceptance of hearing loss. Greater benefit in easy and difficult listening situations was predicted by higher prefitting expectations. Multiple-memory hearing aids produced higher satisfaction. Benefit was greater for multiple-memory, multiple-channel, and wide dynamic range compression aids. Findings were consistent with previous studies showing positive outcomes for newer technologies but also showed that two subjective factors, prefitting hearing aid expectations and acceptance of hearing loss, significantly influenced hearing aid outcome. PMID:11261460
Mollasadeghi, Abolfazl; Mehrparvar, Amir Houshang
Magnetic resonance imaging (MRI) devices produce noise, which may affect patient's or operators' hearing. Some cases of hearing impairment after MRI procedure have been reported with different patterns (temporary or permanent, unilateral or bilateral, with or without other symptoms like tinnitus). In this report, a case of bilateral sensorineural hearing loss in an otherwise healthy patient underwent brain MRI was described. The patient's hearing loss was accompanied with tinnitus and was not improved after 3 months of followup.
Mollasadeghi, Abolfazl; Mehrparvar, Amir Houshang; Atighechi, Saeid; Davari, Mohammad Hossein; Shokouh, Pedram; Mostaghaci, Mehrdad; Bahaloo, Maryam
Magnetic resonance imaging (MRI) devices produce noise, which may affect patient's or operators' hearing. Some cases of hearing impairment after MRI procedure have been reported with different patterns (temporary or permanent, unilateral or bilateral, with or without other symptoms like tinnitus). In this report, a case of bilateral sensorineural hearing loss in an otherwise healthy patient underwent brain MRI was described. The patient's hearing loss was accompanied with tinnitus and was not im...
Mollasadeghi, Abolfazl; Mehrparvar, Amir Houshang; Atighechi, Saeid; Davari, Mohammad Hossein; Shokouh, Pedram; Mostaghaci, Mehrdad; Bahaloo, Maryam
Magnetic resonance imaging (MRI) devices produce noise, which may affect patient's or operators' hearing. Some cases of hearing impairment after MRI procedure have been reported with different patterns (temporary or permanent, unilateral or bilateral, with or without other symptoms like tinnitus). In this report, a case of bilateral sensorineural hearing loss in an otherwise healthy patient underwent brain MRI was described. The patient's hearing loss was accompanied with tinnitus and was not...
Ribeiro, Bruna Natália Freire; Guimarães, Alexandre Caixeta; Yazawa, Felipe; Takara, Tammy Fumiko Messias; de Carvalho, Guilherme Machado; Zappelini, Carlos Eduardo Monteiro
Introduction Dengue is an acute febrile infectious disease, with high fever followed by symptoms flu-like. Dengue hemorrhagic fever (DHF) is a vascular leak syndrome and could present spontaneous bleeding and worsening of symptoms after some days. Dengue could have some ENT manifestations, however hearing loss is not one of them. Sudden hearing loss is considered as sensorineural or perceptual hearing loss with a sudden onset in a person without other prior otological history. The relation between infectious diseases and sudden hearing are been investigated, some viruses were already linked, but the relation between dengue virus and sudden hearing still remains unknown. This article has the goal of presenting a case of DHF that evolved with SSHL in his hospitalization process. Presentation of case We report a 60 years-male patient of with DHF who developed bilateral secretory otitis media and sensorineural hearing loss after the fifth day of onset of symptoms. His hearing loss remained even after 7 months and the patient was referred for hearing aid fitting. Discussion and conclusion This is the first case report that brings together DHF and sudden hearing loss. In the development of this case no other cause to sudden hearing loss was found and the correlation between dengue and hearing loss was questioned. In the literature review was found that some viruses, as mumps virus, varicella-zoster virus and HSV-1 and HSV-2 are related to sudden hearing loss, all of them fit in the viral theory. Besides the viral theory of sudden hearing loss, there is the vascular theory that is the occlusion of the end artery that supplies the cochlea. DHF has a vascular commitment, and the hypothesis of a vascular cause could be elicited in this case. Many studies in this area are needed and this article has the objective of elicit the discussion about the subject. Could dengue be associated with sensorineural hearing loss? PMID:25625489
Trune, Dennis R; Kempton, J Beth
The severe side effects of glucocorticoids prevent long term management of hearing loss. Alternative steroid treatments that minimize or eliminate these effects would significantly benefit therapeutic control of hearing disorders. A steroid treatment study of mouse autoimmune hearing loss was conducted to determine the efficacy of combining aldosterone and prednisolone at low doses. An assessment also was made of low dose fludrocortisone, a synthetic mineralocorticoid that also has a slight g...
Bruna Natália Freire Ribeiro
Discussion and conclusion: This is the first case report that brings together DHF and sudden hearing loss. In the development of this case no other cause to sudden hearing loss was found and the correlation between dengue and hearing loss was questioned. In the literature review was found that some viruses, as mumps virus, varicella-zoster virus and HSV-1 and HSV-2 are related to sudden hearing loss, all of them fit in the viral theory. Besides the viral theory of sudden hearing loss, there is the vascular theory that is the occlusion of the end artery that supplies the cochlea. DHF has a vascular commitment, and the hypothesis of a vascular cause could be elicited in this case. Many studies in this area are needed and this article has the objective of elicit the discussion about the subject. Could dengue be associated with sensorineural hearing loss?
Pillion, Joseph P.
A case study is presented of a 17-year-old male who sustained an anoxic brain injury and sensorineural hearing loss secondary to carbon monoxide poisoning. Audiological data is presented showing a slightly asymmetrical hearing loss of sensorineural origin and mild-to-severe degree for both ears. Word recognition performance was fair to poor bilaterally for speech presented at normal conversational levels in quiet. Management considerations of the hearing loss are discussed.
Terakawa, Yuzo; Tsuyuguchi, Naohiro; Takami, Toshihiro; Ohata, Kenji
We present a rare case of medulloblastoma which presented with unilateral sudden sensorineural hearing loss as an initial symptom. A 19-year-old man was admitted to our hospital with a chief complaint of dizziness and facial numbness on the right side. His illness had begun two years previously with sudden hearing loss on the right side, for which he had been treated as an idiopathic sudden hearing loss. Magnetic resonance imaging demonstrated abnormal signals located mainly in the right midd...
Urganci, Nafiye; Kalyoncu, Derya; Calis, Asli Batur
Sensorineural hearing loss (SNHL) as an extraintestinal manifestation of celiac disease (CD) has been reported in several studies. The aim of this study was to determine presence of subclinical sensorineural hearing loss associated with CD in pediatric patients. Otoscopy, tympanometry and pure tone audiometry were performed in 44 patients with CD and 20 healthy age and sex-matched controls. Pure tone audiometry did not show significant sensorineural hearing loss over all frequencies in patients with CD compared with controls (P > 0.05). SNHL was detected in only three (6.8 %) patients with CD. In conclusion, subclinical sensorineural hearing loss was demonstrated in adult patients with CD; therefore, we recommend to perform audiometric examinations in pediatric patients for recognizing hearing loss early during the course of the disease. PMID:24816746
Akhil Sareen; Vishwambhar Singh
Noise induced hearing loss is one of most common hearing deficit which is almost completely preventable. The hearing loss incurred would depend on the sound qualities, duration of exposure and individual susceptibility and protection. Thereby it can be prevented as we have some set norms for the noise at work places and recreational activities. Once suspected, screening and preventive measures to prevent further progression is taken. There are legislative guidelines for noise at w...
F. M. Shakhatreh; K. J. Abdul-Baqi; M. M. Turk
OBJECTIVES To compare the prevalence rate of hearing loss at different levels of noise in a textile factory and to find out the levels of hearing loss according to duration (years) of employment in the factory. METHODS Seventy workers exposed to different levels of noise were matched with 70 persons in the community who were not exposed to occupational noise. Noise levels dB(A) were measured at different locations in the factory. Hearing was assessed in all participants. Few cases we...
Sudden hearing loss directly associated with pregnancy or birth is a little known and rare occurrence. The temporary, unilateral, low-frequency sensorineural hearing loss in this case was reported after the birth of the patient\\'s first child, and again during the third trimester of her second pregnancy.
Jill B Firszt
Full Text Available Monaural hearing induces auditory system reorganization. Imbalanced input also degrades time-intensity cues for sound localization and signal segregation for listening in noise. While there have been studies of bilateral auditory deprivation and later hearing restoration (e.g. cochlear implants, less is known about unilateral auditory deprivation and subsequent hearing improvement. We investigated effects of long-term congenital unilateral hearing loss on localization, speech understanding, and cortical organization following hearing recovery. Hearing in the congenitally affected ear of a 41 year old female improved significantly after stapedotomy and reconstruction. Pre-operative hearing threshold levels showed unilateral, mixed, moderately-severe to profound hearing loss. The contralateral ear had hearing threshold levels within normal limits. Testing was completed prior to, and three and nine months after surgery. Measurements were of sound localization with intensity-roved stimuli and speech recognition in various noise conditions. We also evoked magnetic resonance signals with monaural stimulation to the unaffected ear. Activation magnitudes were determined in core, belt, and parabelt auditory cortex regions via an interrupted single event design. Hearing improvement following 40 years of congenital unilateral hearing loss resulted in substantially improved sound localization and speech recognition in noise. Auditory cortex also reorganized. Contralateral auditory cortex responses were increased after hearing recovery and the extent of activated cortex was bilateral, including a greater portion of the posterior superior temporal plane. Thus, prolonged predominant monaural stimulation did not prevent auditory system changes consequent to restored binaural hearing. Results support future research of unilateral auditory deprivation effects and plasticity, with consideration for length of deprivation, age at hearing correction, degree and type of hearing loss.
Full Text Available Background and Aim: Machine-made life along with the industrialization of the societies has caused the human to deal with a kind of stressful environment made up of aching sound and vibration sources. Noisiness has been one of the biggest problems of today’s world that the people are in danger of its painful effects. Auditory disorder is the most common reason for Adult Acquired Hearing Loss. As a result, protection against auditory disorders seems to be necessary. Method: In accordance with the importance of this idea, a number of researches in the field of nutrition which resulted in finding the relation between NIHL and vitamins have been carried out. Through the assessment the fact that vitamins can have both preventative and curing influence on NIHL has been evident. Furthermore, it has been discovered that the deficiency of above-mentioned instances can in a way increase the sensitivity of auditory system to noise. Result: There are various mechanisms for NIHL, and each vitamin in a way can go against the destructive affection of it (NIHL. For instance, vitamins A,C and E along with Magnesium can wipe out the free radicals produced by noise exposure. Making use of Antioxidants combinations like vitamin E can prevent auditory cells from death and Noise Induced Hearing Loss from coming about.Conclusion: Vitamin A deficiency increases the sensitivity of auditory system to noise and as a result increases the susceptibility to NIHL. Vitamin C by preventing DNA Oxidation and Lipid Peroxidation in Cochlea has preventive and therapeutic effects on NIHL. Vitamin B12, B6 Deficiency and Folic Acid by damaging Stereo Vascular increase the vulnerability to NIHl. The mechanism and how vitamins affect each of above-mentioned instances will be covered within the article in details.
Martini, Alessandro; Castiglione, Alessandro; Bovo, Roberto; Vallesi, Antonino; Gabelli, Carlo
Sensorineural systems play a crucial role in the diagnosis, treatment and management of several neurological disorders. The function of the eye and ear represents a unique window for testing various conditions in cognitive decline or dementia. Touch and smell have also been found to be strongly involved in neurodegenerative conditions, and their decline has been significantly associated with the progression of the disease; hence, the idea that restoring sensory function in cognitively impaired adults might enable a significant improvement in their cognitive status, reducing the worldwide incidence and prevalence of dementia. Not all sensorineural 'windows' can benefit equally from the same procedures; however, hearing and vision can certainly gain the most from dependable therapeutic and other diagnostic options. The ear, including the vestibular system, deserves an honored place among the sensory organs in this context due mainly to the sophisticated electrical devices available that have amply demonstrated their effectiveness in treating hearing loss. Restoring an individual's hearing can reduce the cognitive 'load', i.e. the neural activity needed to understand/recognize the spoken word - an activity that becomes more demanding if the brain is obliged to recruit different neural populations to achieve the same performance, as happens in older adults with sensory impairments. The sensory interfaces may also facilitate the early diagnosis of conditions characterized by a lengthy preclinical phase, as well as enabling noninvasive, follow-up procedures to assess the outcome of rehabilitation measures and distinguish physiological brain aging from neurodegenerative disorders. The present study is a brief literature review on the issues and prospects relating to the unique relationship between hearing and cognitive decline, with a general introduction to the main topics before focusing on rehabilitation training with hearing aids and cochlear implants to combat cognitive decline. PMID:25733358
Sanchez, Tanit Ganz; Rocha, Savya Cybelle Milhomem; Knobel, Keila Alessandra Baraldi; Kii, Márcia Akemi; Santos, Rosa Maria Rodrigues dos; Pereira, Cristiana Borges
In spite of the fact that musical hallucination have a significant impact on patients' lives, they have received very little attention of experts. Some researchers agree on a combination of peripheral and central dysfunctions as the mechanism that causes hallucination. The most accepted physiopathology of musical hallucination associated to hearing loss (caused by cochlear lesion, cochlear nerve lesion or by interruption of mesencephalon or pontine auditory information) is the disinhibition of auditory memory circuits due to sensory deprivation. Concerning the cortical area involved in musical hallucination, there is evidence that the excitatory mechanism of the superior temporal gyrus, as in epilepsies, is responsible for musical hallucination. In musical release hallucination there is also activation of the auditory association cortex. Finally, considering the laterality, functional studies with musical perception and imagery in normal individuals showed that songs with words cause bilateral temporal activation and melodies activate only the right lobe. The effect of hearing aids on the improvement of musical hallucination as a result of the hearing loss improvement is well documented. It happens because auditory hallucination may be influenced by the external acoustical environment. Neuroleptics, antidepressants and anticonvulsants have been used in the treatment of musical hallucination. Cases of improvement with the administration of carbamazepine, meclobemide and donepezil were reported, but the results obtained were not consistent. PMID:21625772
T G Sanchez
Full Text Available In spite of the fact that musical hallucination have a significant impact on patients' lives, they have received very little attention of experts. Some researchers agree on a combination of peripheral and central dysfunctions as the mechanism that causes hallucination. The most accepted physiopathology of musical hallucination associated to hearing loss (caused by cochlear lesion, cochlear nerve lesion or by interruption of mesencephalon or pontine auditory information is the disinhibition of auditory memory circuits due to sensory deprivation. Concerning the cortical area involved in musical hallucination, there is evidence that the excitatory mechanism of the superior temporal gyrus, as in epilepsies, is responsible for musical hallucination. In musical release hallucination there is also activation of the auditory association cortex. Finally, considering the laterality, functional studies with musical perception and imagery in normal individuals showed that songs with words cause bilateral temporal activation and melodies activate only the right lobe. The effect of hearing aids on the improvement of musical hallucination as a result of the hearing loss improvement is well documented. It happens because auditory hallucination may be influenced by the external acoustical environment. Neuroleptics, antidepressants and anticonvulsants have been used in the treatment of musical hallucination. Cases of improvement with the administration of carbamazepine, meclobemide and donepezil were reported, but the results obtained were not consistent.
Full Text Available Hartmut Meister,1 Sebastian Rählmann,1 Martin Walger,2 Sabine Margolf-Hackl,3 Jürgen Kießling3 1Jean Uhrmacher Institute for Clinical ENT-Research, University of Cologne, Cologne, Germany; 2Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany; 3Department of Othorhinolaryngology, Head and Neck Surgery, University of Giessen, Giessen, Germany Purpose: To examine the association of cognitive function, age, and hearing loss with clinically assessed hearing aid benefit in older hearing-impaired persons.Methods: Hearing aid benefit was assessed using objective measures regarding speech recognition in quiet and noisy environments as well as a subjective measure reflecting everyday situations captured using a standardized questionnaire. A broad range of general cognitive functions such as attention, memory, and intelligence were determined using different neuropsychological tests. Linear regression analyses were conducted with the outcome of the neuropsychological tests as well as age and hearing loss as independent variables and the benefit measures as dependent variables. Thirty experienced older hearing aid users with typical age-related hearing impairment participated.Results: Most of the benefit measures revealed that the participants obtained significant improvement with their hearing aids. Regression models showed a significant relationship between a fluid intelligence measure and objective hearing aid benefit. When individual hearing thresholds were considered as an additional independent variable, hearing loss was the only significant contributor to the benefit models. Lower cognitive capacity – as determined by the fluid intelligence measure – was significantly associated with greater hearing loss. Subjective benefit could not be predicted by any of the variables considered.Conclusion: The present study does not give evidence that hearing aid benefit is critically associated with cognitive function in experienced hearing aid users. However, it was found that lower fluid intelligence scores were related to higher hearing thresholds. Since greater hearing loss was associated with a greater objective benefit, these results strongly support the advice of using hearing aids regardless of age and cognitive function to counter hearing loss and the adverse effects of age-related hearing impairment. Still, individual cognitive capacity might be relevant for hearing aid benefit during an initial phase of hearing aid provision if acclimatization has not yet taken place. Keywords: fluid intelligence, working memory, experience
Mozafar Sarafraz; Mahmood Hekmat-Shoar; Sara Zaheri
Introduction: Children learn to communicate by hearing sounds. If there is hearing loss, the cognitive and speaking abilities and language learning will deteriorate. Early detection and intervention are important factors in the successful treatment of hearing loss in children. Hearing loss (HL) is divided into two main groups: conductive hearing loss (CHL) and sensorineural hearing loss (SNHL), the prevalence of the former being higher in children, many whose causes are easy to detect and tre...
MAJMIN SH; AZIMAH MN; LEE VKM; Zaitun, A; LEELAVATHI M; ROSDINA AK; MOHD KA
A cross-sectional study was conducted on patients attending a primary care facility to determine the prevalence of self reported hearing loss using a single question, “Do you have hearing loss?” Pure tone audiometry was performed to compare the accuracy of the self report. A total of 111 patients were recruited. The prevalence of self reported hearing loss using a single question and pure tone audiometry was 24.3% and 36.9% respectively. By using pure tone audiometry at a cut-off-level of 25 ...
Størmer, Carl Christian Lein; Laukli, Einar; Høydal, Erik Harry; Stenklev, Niels Christian
Our focus in this study was to assess hearing thresholds and the prevalence and characteristics of tinnitus in a large group of rock musicians based in Norway. A further objective was to assess related factors such as exposure, instrument category, and the preventive effect of hearing protection. The study was a cross-sectional survey of rock musicians selected at random from a defined cohort of musicians. A random control group was included for comparison. We recruited 111 active musicians from the Oslo region, and a control group of 40 nonmusicians from the student population at the University of TromsØ. The subjects were investigated using clinical examination, pure tone audiometry, tympanometry, and a questionnaire. We observed a hearing loss in 37.8% of the rock musicians. Significantly poorer hearing thresholds were seen at most pure-tone frequencies in musicians than controls, with the most pronounced threshold shift at 6 kHz. The use of hearing protection, in particular custom-fitted earplugs, has a preventive effect but a minority of rock musicians apply them consistently. The degree of musical performance exposure was inversely related to the degree of hearing loss in our sample. Bass and guitar players had higher hearing thresholds than vocalists. We observed a 20% prevalence of chronic tinnitus but none of the affected musicians had severe tinnitus symptomatology. There was no statistical association between permanent tinnitus and hearing loss in our sample. We observed an increased prevalence of hearing loss and tinnitus in our sample of Norwegian rock musicians but the causal relationship between musical exposure and hearing loss or tinnitus is ambiguous. We recommend the use of hearing protection in rock musicians. PMID:26572701
Lieu, Judith E C
Children with impaired hearing in one ear (unilateral hearing loss [UHL]) and normal hearing in the other ear experience challenges in understanding speech in noisy backgrounds and localizing the source of sounds in 3-dimensional space. They are at a high risk for speech and language delay and need educational help in school. However, definitive evidence of benefit from amplification is currently lacking to recommend placement of hearing aids or cochlear implants in all young children with UHL. Management of UHL in children should be guided by the child's development, performance in school, and personal/family values and preferences. PMID:26443488
The enhanced MRI hearing findings of the inner ear in 124 patients with sensorineural hearing loss were evaluated. MR images were obtained before and after the intravenous administration of gadolinium (0.1 mmol/kg). In three out of seventy-nine patients with unilateral healing loss, cochlear and/or the vestibular enhancement was noted on the symptomatic side. The positive cases included those with Ramsay-Hunt syndrome, mumps and so-called sudden deafness. Forty-five patients with bilateral hearing loss showed no enhancement within the inner ear. Although positive gadolinium enhancement of the inner ear may detect inflammatory lesions due to a viral infection, its incidence in sensorineural hearing loss, including cases of sudden deafness. seems to be extremely rare. (author)
Warner-Czyz, Andrea D.; Loy, Betty A.; Evans, Christine; Wetsel, Ashton; Tobey, Emily A
Children with hearing loss are at risk for lower self-esteem due to differences from hearing peers relative to communication skills, physical appearance, and social maturity. This study examines the influence of generic factors unrelated to hearing loss (e.g., age, gender, temperament) and specific factors associated with hearing loss (e.g., age at identification, communication skills) on how children with hearing loss wearing cochlear implants or hearing aids appraise self-esteem. Fifty chil...
Frederiksen, Birgitte Lidegaard; Cayé-Thomasen, Per; Lund, Søren Peter; Wagner, Niels; Asal, Korhan; Olsen, Niels Vidiendal; Thomsen, Jens
Noise-induced hearing loss may result from excessive release of glutamate, nitrogen oxide and reactive oxygen species. The effects of these factors on the inner ear may potentially be prevented or reduced by erythropoietin (EPO), as indicated by previously demonstrated neuro-protective effects of EPO upon damage to the central nervous system and the retina. This paper reports three separate trials, conducted to investigate the hypothesis that noise-induced hearing loss is prevented or reduced by...
Ijaduola Taiwo G
Full Text Available Abstract Background It is recognized that the size of tympanic membrane(TM perforation is proportional to the magnitude of hearing loss, however, there is no clear consensus on the effect of the location (site of the perforation on the hearing loss. Hence the study is set to investigate the relationship between the location of perforation on TM and hearing loss. Methods A cross-sectional prospective study of consecutive adult patients with perforated TM conducted in the ENT clinic of University College Hospital Ibadan between January 1st 2005 and July 31st 2006. Instruments used for data collection/processing include questionnaires, video and micro-otoscopy, Pure tone audiometer, image J and SPSS packages. Results Sixty-two patients (22-males, 40-females, aged 16–75 years (mean = 35.4 +/- 4 with 77 perforated ear drums were studied and 15(24.2% had bilateral TM perforations, 21 (33.9% right unilateral and 26(41.9% left unilateral. The locations of the TM perforations were 60(77.9% central, 6(9.6% antero-inferior, 4(5.2% postero-inferior, 4(5.2% antero-superior and 3(3.9% postero-superior respectively with sizes ranging from 1.51%–89.05%, and corresponding hearing levels 30 dB – 80 dB (59% conductive and 41% mixed. Fifty-nine percent had pure conductive hearing loss and the rest mixed. Hearing losses (dBHL increased with the size of perforations (P = 0.01, r = 0.05. Correlation of location of perforations with magnitude of hearing loss in acute TM perorations was (P = 0.244, r = 0.273 and for chronic perforations (p = 0.047 & r = 0.31. Conclusion The location of perforation on the tympanic membrane (TM has no effect on the magnitude of hearing loss in acute TM perforations while it is significant in chronic ones.
Mehmet Emin CEYLAN
Full Text Available Objective: World Health Organization (WHO defines hearing loss as an impairment in perception, attention and organisation as well as in speaking, In this study, on the base of biopsychosocial theory, we aimed to determine both psychiatric symptoms of the patients who have acquired (but ideopathic hearing impairment/loss, and also, if there was, an association between this physical illness and psychiatric symptoms. Methods: The groups of patients with mild, moderate and severe hearing impairment and a healthy control group were enrolled in the study. Each group contained 30 persons. A sociodemographic questionnaire, the Symptom Check List 90-Revised Form (SCL-90-R and the Non-Patients Form of Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders (SCID-NP were used. Results: The psychopathology that have been found in our study was 35.6% in patients group versus 20% in controls. 30-50% of patients with hearing loss reported both social and psychological problems. According to SCL-90-R, in the patients’ groups who had especially moderate and severe hearing loss were more paranoid and depressive; they had more eating and sleeping difficulties; also they complained more from musical hallucinations (25% and their scores of positive symptoms and of additional scales in SCL-90-R were higher than the controls (p< 0.001. In SCID-NP, especially the hallucination, the paranoia and the depression scores were higher in patients with hearing loss. Conclusion: The reasons for psychiatric symptoms in the patients with hearing impairment or loss are multiethiological and it is known that disability is the major ethiological factor. The results of our study showed us that the psychiatry and the other medical disciplines should always work together. (Archives of Neuropsychiatry 2009; 46: 149-56
Nielsen, Lars Bramsløw
An auditory model based on the psychophysics of hearing has been developed and tested. The model simulates the normal ear or an impaired ear with a given hearing loss. Based on reviews of the current literature, the frequency selectivity and loudness growth as functions of threshold and stimulus level have been found and implemented in the model. The auditory model was verified against selected results from the literature, and it was confirmed that the normal spread of masking and loudness growt...
Full Text Available Background: Among patients who have sensorineural hearing loss of unknown etiology, diabetes is one of the diseases to be routinely investigated. The relationship between diabetes mellitus and hearing loss is still controversial. The purpose of this study was to examine the prevalence of sensorineural hearing loss in patients with insulin-dependent diabetes mellitus (IDDM compared to control group.Methods: In a cross-sectional study pure tone audiometry (PTA and speech audiometry was performed in 62 patients with insulin-dependent diabetes mellitus (IDDM, aged under 40 years, and in 62 randomly selected age-matched non-diabetic control subjects. Subjects with otological and other metabolic diseases were excluded from the study. We applied the SPSS.10 statistical analysis software Chi-square and student's test. Results: Statistical analysis showed that the hearing of the diabetic patients were significantly worsen than the control subjects. The hearing level tended to be worsen in the diabetic patients than that in control subjects, but the differences were statistically significant only at frequencies of 250,500, 4000 and 8000 Hz p>0.05(. There wasn't statistical significant difference between sex in two study groups p>0.05(. The mean duration of diabetes was no statistically significant with hearing loss p>0.05(. The frequency of complications such as retinopathy, nephropathy, and neuropathy in the diabetic groups had no correlation with speech threshold (p>0.05(.? There were no significant differences between speech reception threshold, speech discrimination score and acoustic reflex in two groups.Conclusions: We conclude that type I diabetes mellitus can cause sensorineural hearing loss.
... information.) Cochlear (COKE-lee-ur) implants are small electronic devices surgically implanted in the inner ear that help ... have less space available for batteries and additional devices, such as a telecoil. ... for young children or for people with severe to profound hearing ...
Adriana Bender Moreira, Lacerda; Claudia Giglio de Oliveira, Gonçalves; Giselle, Lacerda; Diolén Conceição Barros, Lobato; Luciana, Santos; Aline Carlezzo, Moreira; Angela, Ribas.
Full Text Available Introduction The presence of noise in our society has attracted the attention of health professionals, including speech-language pathologists, who have been charged along with educators with developing hearing conservation programs in schools. Objective To describe the results of three strategies f [...] or awareness and hearing preservation in first to fourth grades in public elementary schools. Methods The level of environmental noise in classrooms was assessed, and 638 elementary school students from first to fourth grades, 5 to 10 years of age, were audiologically evaluated. After the evaluations, educational activities were presented to children and educators. Results The noise level in the classroom ranged from 71.8 to 94.8 A-weighted decibels. The environment of the classroom was found to promote sound reverberation, which hinders communication. Thirty-two students (5.1%) presented hearing alterations. Conclusion The application of strategies for a hearing conservation program at the school showed that noise is present in the room, and hearing loss, sometimes silent, affects schoolchildren. Students and teachers were aware that hearing problems can be prevented. Avoiding exposure to noise and improving the acoustics in classrooms are essential.
Lacerda, Adriana Bender Moreira; Gonçalves, Claudia Giglio de Oliveira; Lacerda, Giselle; Lobato, Diolén Conceição Barros; Santos, Luciana; Moreira, Aline Carlezzo; Ribas, Angela
Introduction?The presence of noise in our society has attracted the attention of health professionals, including speech-language pathologists, who have been charged along with educators with developing hearing conservation programs in schools. Objective?To describe the results of three strategies for awareness and hearing preservation in first to fourth grades in public elementary schools. Methods?The level of environmental noise in classrooms was assessed, and 638 elementary school students from first to fourth grades, 5 to 10 years of age, were audiologically evaluated. After the evaluations, educational activities were presented to children and educators. Results?The noise level in the classroom ranged from 71.8 to 94.8 A-weighted decibels. The environment of the classroom was found to promote sound reverberation, which hinders communication. Thirty-two students (5.1%) presented hearing alterations. Conclusion?The application of strategies for a hearing conservation program at the school showed that noise is present in the room, and hearing loss, sometimes silent, affects schoolchildren. Students and teachers were aware that hearing problems can be prevented. Avoiding exposure to noise and improving the acoustics in classrooms are essential. PMID:25992146
Full Text Available Introduction: Unilateral hearing loss has devastating effects on sound localization, speech understanding in adverse listening conditions, academic achievement, behavior and learning of Hearing impaired children. Early detection and intervention with regard to the issues of unilateral hearing loss is important in young children. The main goal of this study was to determine the prevalence of unilateral hearing loss among kindergarteners aged 3-6 years in Hamadan city, 2012.Material and Methods: In this cross-sectional descriptive study, 345 subjects (185 female, 160 male were selected through random sampling. Play Audiometry test was used to determine the hearing threshold.Results: The results indicated that from the sum of 690 ears, 30(4.3%, had unilateral hearing loss; 26 (3.8% with conductive hearing loss, 3 (0.4% with sensorineural hearing loss and one (0.1% with mixed hearing loss. No significant differences were observed between paired ears, genders and different ages.Conclusion: In this study, the prevalence of unilateral hearing loss was high (4.3%, 3.8% is conductive hearing loss accruing least one during childs language learning. Given the high prevalence of unilateral hearing loss in children 3-6 years of age, and the importance of this period in speech, language and learning development, early diagnosis and intervention is essential.
Pinquart, Martin; Pfeiffer, Jens P.
We compared alcohol use among adolescents with and without hearing loss. Adolescents with hearing loss reported consuming less alcohol, less binge drinking, fewer episodes of drunkenness, and a higher age at first drunkenness than their hearing peers. Alcohol use did not vary between students who were deaf or hard of hearing or between students…
Werfel, Krystal L.; Lund, Emily; Schuele, C. Melanie
Measures of print knowledge were compared across preschoolers with hearing loss and normal hearing. Alphabet knowledge did not differ between groups, but preschoolers with hearing loss performed lower on measures of print concepts and concepts of written words than preschoolers with normal hearing. Further study is needed in this area.
Rasmussen, Rune, E-mail: email@example.com [Department of Neurosurgery, Rigshospitalet, Copenhagen (Denmark); Claesson, Magnus [Department of Neurosurgery, Rigshospitalet, Copenhagen (Denmark); Stangerup, Sven-Eric [Ear, Nose, and Throat Department, Rigshospitalet, Copenhagen (Denmark); Roed, Henrik [Department of Radiation Oncology, Rigshospitalet, Copenhagen (Denmark); Christensen, Ib Jarle [Finsen Laboratory, Rigshospitalet, Copenhagen (Denmark); Caye-Thomasen, Per [Ear, Nose, and Throat Department, Rigshospitalet, Copenhagen (Denmark); Juhler, Marianne [Department of Neurosurgery, Rigshospitalet, Copenhagen (Denmark)
Objective: To evaluate long-term tumor control and hearing preservation rates in patients with vestibular schwannoma treated with fractionated stereotactic radiotherapy (FSRT), comparing hearing preservation rates to an untreated control group. The relationship between radiation dose to the cochlea and hearing preservation was also investigated. Methods and Materials: Forty-two patients receiving FSRT between 1997 and 2008 with a minimum follow-up of 2 years were included. All patients received 54 Gy in 27-30 fractions during 5.5-6.0 weeks. Clinical and audiometry data were collected prospectively. From a 'wait-and-scan' group, 409 patients were selected as control subjects, matched by initial audiometric parameters. Radiation dose to the cochlea was measured using the original treatment plan and then related to changes in acoustic parameters. Results: Actuarial 2-, 4-, and 10-year tumor control rates were 100%, 91.5%, and 85.0%, respectively. Twenty-one patients had serviceable hearing before FSRT, 8 of whom (38%) retained serviceable hearing at 2 years after FSRT. No patients retained serviceable hearing after 10 years. At 2 years, hearing preservation rates in the control group were 1.8 times higher compared with the group receiving FSRT (P=.007). Radiation dose to the cochlea was significantly correlated to deterioration of the speech reception threshold (P=.03) but not to discrimination loss. Conclusion: FSRT accelerates the naturally occurring hearing loss in patients with vestibular schwannoma. Our findings, using fractionation of radiotherapy, parallel results using single-dose radiation. The radiation dose to the cochlea is correlated to hearing loss measured as the speech reception threshold.
Objective: To evaluate long-term tumor control and hearing preservation rates in patients with vestibular schwannoma treated with fractionated stereotactic radiotherapy (FSRT), comparing hearing preservation rates to an untreated control group. The relationship between radiation dose to the cochlea and hearing preservation was also investigated. Methods and Materials: Forty-two patients receiving FSRT between 1997 and 2008 with a minimum follow-up of 2 years were included. All patients received 54 Gy in 27-30 fractions during 5.5-6.0 weeks. Clinical and audiometry data were collected prospectively. From a “wait-and-scan” group, 409 patients were selected as control subjects, matched by initial audiometric parameters. Radiation dose to the cochlea was measured using the original treatment plan and then related to changes in acoustic parameters. Results: Actuarial 2-, 4-, and 10-year tumor control rates were 100%, 91.5%, and 85.0%, respectively. Twenty-one patients had serviceable hearing before FSRT, 8 of whom (38%) retained serviceable hearing at 2 years after FSRT. No patients retained serviceable hearing after 10 years. At 2 years, hearing preservation rates in the control group were 1.8 times higher compared with the group receiving FSRT (P=.007). Radiation dose to the cochlea was significantly correlated to deterioration of the speech reception threshold (P=.03) but not to discrimination loss. Conclusion: FSRT accelerates the naturally occurring hearing loss in patients with vestibular schwannoma. Our findings, using fractionation of radiotherapy, parallel results using single-dose radiation. The radiation dose to the cochlea is correlated to hearing loss measured as the speech reception threshold.
... Adults' Hearing Loss May Be Tied to Earlier Death Findings don't prove that impaired hearing is ... loss could have directly contributed to the higher death rates seen in this study. Still, Kim pointed ...
Full Text Available Background and Aim: In different language approaches, reading is considered as a major skill. Language skills comprising listening, speaking, reading and writing are completely interlinked with each other. Thus, providing active application of listening and speaking skills, children will learn reading and writing skills easily. The aim of this research was to compare reading skills of hearing-loss students studying at exceptional schools with normal students of different degrees.Methods: The research was conducted post-traumatically using standardized 2006 PIRLS test. 80 students in fifth grade of exceptional primary schools, and first and fourth grade of exceptional high schools in Tehran City who had severe and or profound hearing loss were randomly selected along with 80 normal students in ordinary schools who were selected using available sampling method.Results: There were significant differences between reading comprehension of hearing-loss and normal students of all three grades (p<0.001. Reading comprehension in female students was significantly higher than the male ones (p<0.001. There were not any significant differences in mean reading comprehension scores of hearing-loss students in different grades which demonstrate that their reading skills had not developed in tandem with their age and school educations.Conclusion: This study shows that one of the significant concerns regarding hearing-loss students is their reading comprehension ability. Considering reading ability as one of the most important acquisitive abilities which students learn at school, evaluation of reading skills of hearing loss students as well as recognition of their strengths and weaknesses in this field is indispensable.
Zahra Shahidipour; Ahmad Geshani; Zahra Jafari; Shohreh Jalaie; Elham Khosravifard
Introduction: Hearing loss is one of the most common problems in elderly people. Functional side effects of hearing loss are various. Due to the fact that hearing loss is the common impairment in elderly people; the importance of its possible effects on auditory memory is undeniable. This study aims to focus on the hearing loss effects on auditory memory. Materials and Methods: Dichotic Auditory Memory Test (DVMT) was performed on 47 elderly people, aged 60 to 80; that were divided in two g...
The increased use of mobile phones worldwide has focused interest on the biological effects and possible health outcomes of exposure to radiofrequency fields from mobile phones, and their base stations. Various reports suggest that mobile phone use can cause health problems like fatigue, headache, dizziness, tension and sleep disturbances, however, only limited research data is available in medical literature regarding interaction between electromagnetic fields emitted by mobile phones and auditory function and the possible impact on hearing. We report a case of sensorineural hearing loss due to Global System for Mobile Communication mobile phone use in a 42-year-old male. (author)
Al-Dousary, Surayie H
The increased use of mobile phones worldwide has focused interest on the biological effects and possible health outcomes of exposure to radiofrequency fields from mobile phones, and their base stations. Various reports suggest that mobile phone use can cause health problems like fatigue, headache, dizziness, tension, and sleep disturbances; however, only limited research data is available in medical literature regarding interaction between electromagnetic fields emitted by mobile phones and auditory function; and the possible impact on hearing. We report a case of sensorineural hearing loss due to Global System for Mobile Communications mobile phone use, in a 42-year-old male. PMID:17676220
Ricardo, Godinho; Ivan, Keogh; Roland, Eavey.
Full Text Available O progresso das pesquisas relacionadas à perda auditiva genética tem provocado um importante avanço do entendimento dos mecanismos moleculares que governam o desenvolvimento, a função, a resposta ao trauma e o envelhecimento do ouvido interno. Em países desenvolvidos, mais de 50% dos casos de surdez [...] na infância é causada por alterações genéticas e as perdas auditivas relacionadas à idade têm sido associadas com mecanismos genéticos. OBJETIVO: O objetivo desta revisão é relatar as informações mais recentes relacionadas às perdas audtivas de origem genética. FORAMA DE ESTUDO: Revisão sistemática. MATERIAL E MÉTODO: A revisão da literatura inclui artigos indexados à MEDLINE (Biblioteca Nacional de Saúde, NIH-USA) e publicados nos últimos 3 anos, além das informações disponíveis na Hereditary Hearing Loss Home Page. CONCLUSÃO: Os recentes avanços no entendimento das perdas auditivas de origem genética têm favorecido a nossa compreensão da função auditiva e tornado o diagnóstico mais apurado. Possivelmente, no futuro, este conhecimento também proporcionará o desenvolvimento de novas terapias para o tratamento das causas genéticas das perdas auditivas. Abstract in english The progress in the research of genetic hearing loss has advanced our understanding of the molecular mechanisms that govern inner ear development, function and response to injury and aging. In the developed world, over 50% of childhood deafness is attributable to genetic causes and even age-related [...] hearing loss has been associated with genetic mechanisms. AIM: The objective of this review is to summarize recent knowledge in genetic hearing loss. STUDY DESIGN: Sistematic review. MATERIAL AND METHODS: The literature review included articles indexed at MEDLINE (The National Library of Medicine, The National Institute of Health - USA) focusing on publications from the past 3 years plus the information available at the Hereditary Hearing Loss Home Page. CONCLUSION: Advances in the genetics of hearing loss have enhanced our comprehension of auditory function and have enabled more accurate diagnosis. Hopefully, as we further understand the molecular elements of the auditory system, this knowledge will help in the development of new therapies for the treatment of the underlying genetic defects.
Full Text Available Modern day high-performance machines, weapons, aircrafts and locomotives are more powerful, more efficient, and unfortunately, frequently produce high noise levels resulting in Noise-induced Hearing Loss (NIHL. Mechanical hearing protection is essential and effective; however, inherent limitations allow a significant percentage of permanent hearing loss to occur despite protection. Hence, a pharmacological preventative or rescue agent for NIHL forms an important element of a comprehensive approach to maintaining inner ear functional integrity in individuals exposed to noise. The ideal pharmacologic agent would specifically address known mechanisms of acoustic injury, be orally administered, be exceptionally safe, be effective and affordable. Though currently such a pharmacological agent is not available, but the ongoing research is promising. In this article, we discuss various pharmacological agents for prevention and management of NIHL.
Muhammed Oylumlu; Faris Mahmode Lolan; Suleyman Ercan; Gokhan Altunbas; Zeynel Karatas; Vedat Davutoglu
It has been suggested that high cholesterol levels might have adverse effects on hearing and interest- ingly statins may have beneficial effects on hearing loss. Herein, we share a dramatic improvement in acute hearing loss by statin administration in a young patient with familial hypercholesterolemia. To our knowledge this is the first report indicating the possible role of statins in patients suffering from sudden hearing loss in the context of familial hypercholesterolemia. Although the st...
Full Text Available A few cases of mild to moderate, gradual and reversible sensorineural hearing loss (SNHL with prolonged doses of nonsteroidal anti-inflammatory drugs has been reported. We present a case of sudden irreversible SNHL in a 60-year-old female after taking a single dose of diclofenac. The patient was a known case of diabetes mellitus and hypertension and was on regular treatment. We postulate that the patient's hearing loss was the result of diclofenac's ototoxic effects which may have been potentiated as a result of her long standing diabetes, hypertension and old age. Accordingly, we recommend the cautious use of diclofenac in patients with underlying diseases where diclofenac induced ototoxicity could potentially result in adverse otologic consequences.
Seven adult patients with bilateral progressive hearing loss (six male, one female; aged 40-74 years) were studied with a high-field strength (1.5-T) magnetic resonance (MR) system after previous negative workup with either air contrast or intravenous contrast medium-enhanced computed tomography (CT). In all instances, the patients showed extensive evidence of pial siderosis outlining the posterior fossa subarachnoid space. The siderosis was manifested (on long repetition time images) as an increasing susceptibility effect (hypointensity) with a prolongation of echo time. The results of this study indicate that a negative CT examination is inadequate in patients with bilateral hearing loss and that when evidence of siderosis is found on MR images, an etiology for prior subarachnoid hemorrhage must be pursued
Infantile autism is a serious comprehensive developmental disorder. The diagnosis of hearing loss or its exclusion, which often suggests suspected autism, is very important for early ENT, psychotherapy, and psychiatric treatment. One hundred children diagnosed with autism aged from 3 to 18 years, with a median age of 5 years, were evaluated. The control group of healthy children consisted of 100 children, aged from 3 to 18 years, with a median age of 6 years. Anamnesis and physical examinatio...
Florentine, Mary; Buus, Søren
Listeners with hearing losses cannot hear low-level sounds. In addition, they often complain that audible sounds do not have a comfortable loudness, lack clarity, and are difficult to hear in the presence of other sounds. In particular, they have difficulty understanding speech in background noise. The mechanisms underlying these complaints are not completely understood, but hearing losses are known to alter many aspects of auditory processing. This presentation highlights alterations in audibility, loudness, pitch, spectral and temporal processes, and binaural hearing that may result from hearing losses. The changes in these auditory processes can vary widely across individuals with seemingly similar amounts of hearing loss. For example, two listeners with nearly identical thresholds can differ in their ability to process spectral and temporal features of sounds. Such individual differences make rehabilitation of hearing losses complex. [Work supported by NIH/NIDCD.
Cinamon, Rachel Gali; Most, Tova; Michael, Rinat
This study examined the effect of hearing status on role salience and anticipated work–family relations among 101 unmarried young adults aged 20–33 years: 35 with hearing loss (19 hard of hearing and 16 deaf) and 66 hearing. Participants completed the Life Role Salience scale, anticipated conflictual relations scale, anticipated facilitory relations scale, and a background questionnaire. The deaf participants demonstrated a significantly higher level of commitment to work but anticipated the ...
Tanaka, Chiemi; Nguyen-Huynh, Anh; Loera, Katherine; Stark, Gemaine; Reiss, Lina
The Hybrid cochlear implant (CI), also known as Electro-Acoustic Stimulation (EAS), is a new type of CI that preserves residual acoustic hearing and enables combined cochlear implant and hearing aid use in the same ear. However, 30-55% of patients experience acoustic hearing loss within days to months after activation, suggesting that both surgical trauma and electrical stimulation may cause hearing loss. The goals of this study were to: 1) determine the contributions of both implantation surgery and EAS to hearing loss in a normal-hearing guinea pig model; 2) determine which cochlear structural changes are associated with hearing loss after surgery and EAS. Two groups of animals were implanted (n = 6 per group), with one group receiving chronic acoustic and electric stimulation for 10 weeks, and the other group receiving no direct acoustic or electric stimulation during this time frame. A third group (n = 6) was not implanted, but received chronic acoustic stimulation. Auditory brainstem response thresholds were followed over time at 1, 2, 6, and 16 kHz. At the end of the study, the following cochlear measures were quantified: hair cells, spiral ganglion neuron density, fibrous tissue density, and stria vascularis blood vessel density; the presence or absence of ossification around the electrode entry was also noted. After surgery, implanted animals experienced a range of 0-55 dB of threshold shifts in the vicinity of the electrode at 6 and 16 kHz. The degree of hearing loss was significantly correlated with reduced stria vascularis vessel density and with the presence of ossification, but not with hair cell counts, spiral ganglion neuron density, or fibrosis area. After 10 weeks of stimulation, 67% of implanted, stimulated animals had more than 10 dB of additional threshold shift at 1 kHz, compared to 17% of implanted, non-stimulated animals and 0% of non-implanted animals. This 1-kHz hearing loss was not associated with changes in any of the cochlear measures quantified in this study. The variation in hearing loss after surgery and electrical stimulation in this animal model is consistent with the variation in human patients. Further, these findings illustrate an advantage of a normal-hearing animal model for quantification of hearing loss and damage to cochlear structures without the confounding effects of chemical- or noise-induced hearing loss. Finally, this study is the first to suggest a role of the stria vascularis and damage to the lateral wall in implantation-induced hearing loss. Further work is needed to determine the mechanisms of implantation- and electrical-stimulation-induced hearing loss. PMID:25128626
... children with hearing loss. Some of these include: Text messaging Telephone amplifiers Flashing and vibrating alarms Audio loop ... as sign language) to help their children learn language. These skills can be used together with hearing aids, cochlear ...
A.L., Edwards; D., Kritzingert.
Full Text Available A retrospective study was conducted on the Rand Mutual Assurance (RMA) noise-induced hearing loss (NIHL) compensation claims from 1998 to 2008 to determine if the 2008 milestone agreed at the 2003 Mine Health and Safety Summit was achieved. The number and costs of NIHL compensation claims in differe [...] nt commodity sectors and workplaces were collated. A secondary analysis of the ages of employees compensated after 2008 was conducted. A complementary retrospective analysis of audiogram data investigated the percentage loss of hearing (PLH) shift in different homogeneously exposed groups and occupations at two gold mines. The compensation claims analysis indicated a significant decrease in NIHL claims from 1998 to 2008, but the milestone was not achieved. The reason may be either that claims have not been submitted timeously as required by Instruction 171 and that the current submissions are a result of pre-2003 noise exposure, or that employees who were baselined are still developing NIHL owing to ineffective hearing conservation programmes in place in the mining industry. On the basis of best practice for hearing conservation, recommendations are made for leading indicators in hearing conservation programmes and for reducing the risks of NIHL in order to achieve the 2013 milestone.
WorsØe, Lise Lotte; Caye-Thomasen, P.
Background. On the basis of a nationwide registration during a 5-year period (1999-2003), the frequency and severity of hearing loss was investigated retrospectively in 343 consecutive Danish patients who survived pneumococcal meningitis, to identify important risk factors (including the pneumococcal serotype) for development of hearing loss. Methods. Results of blood and cerebrospinal fluid (CSF) biochemistry, bacterial serotyping, follow-up audiological examinations, and medical records were collected, and disease-related risk factors for hearing loss were identified. The mean pure-tone hearing threshold levels were compared with normative data. Results. Of 240 patients examined by use of audiometry, 129 (54%) had a hearing deficit, and 50 (39%) of these 129 patients were not suspected of hearing loss at discharge from hospital. Of the 240 patients, 16 (7%) had profound unilateral hearing loss, and another 16 (7%) had bilateral profound hearing loss. Significant risk factors for hearing loss were advanced age, the presence of comorbidity, severity of meningitis, a low CSF glucose level, a high CSF protein level, and a certain pneumococcal serotype (P <.05). By applying multivariate logistic regression analysis, we found that advanced age, female sex, and a certain serotype were significant risk factors, because fewer patients with serotype 6B had hearing loss than did patients with serotype 12F (P = .03), which was the most commonly occurring serotype. Conclusion. Hearing loss is common after pneumococcal meningitis, and audiometry should be performed on all those who survive pneumococcal meningitis. Important risk factors for hearing loss are advanced age, female sex, severity of meningitis, and bacterial serotype
Jankar DS, Bodhe CD, Bhutada TB
Diabetes-related sensorineural hearing impairment affects people’s ability to hear and understand sounds. We carried out this case control study with the purpose of determining the hearing loss in type II diabetes mellitus in relation to the age and gender of the patients and duration of the illness using tuning fork tests and pure tone audiometry. Aim: To study the hearing loss in type II diabetics and controls. Objectives:1. To study the hearing loss in relation to different age groups in ...
Full Text Available In this study, we investigated the relation between the use of hearing aids at the initial stages of hearing loss and age-related changes in the auditory and cognitive abilities of elderly persons. 12 healthy elderly persons participated in an annual auditory and cognitive longitudinal examination for three years. According to their hearing level, they were divided into 3 subgroups - the normal hearing group, the hearing loss without hearing aids group, and the hearing loss with hearing aids group. All the subjects underwent 4 tests: pure-tone audiometry, syllable intelligibility test, dichotic listening test (DLT, and Wechsler Adult Intelligence Scale-Revised (WAIS-R Short Forms. Comparison between the 3 groups revealed that the hearing loss without hearing aids group showed the lowest scores for the performance tasks, in contrast to the hearing level and intelligibility results. The other groups showed no significant difference in the WAIS-R subtests. This result indicates that prescription of a hearing aid during the early stages of hearing loss is related to the retention of cognitive abilities in such elderly people. However, there were no statistical significant correlations between the auditory and cognitive tasks.
Olsen, Henrik L
Cochlear hearing loss leads to deficits in many perceptual aspects, including threshold elevation (loss of sensitivity), reduction of auditory dynamic range (loudness recruitment) and problems with resolving sounds (loss of supra-threshold hearing). An ongoing debate is whether assessment of the individual supra-threshold hearing provides information which is likely to have an important influence on clinical decisions on signal processing strategies. The aim of this thesis w...
Bickerton Richard C; Ahmed Shahzada K; Thio Daniel
Abstract Background Cholesteatomas are epithelial cysts that contain desquamated keratin. Patients commonly present with progressive hearing loss and a chronically discharging ear. We report an unusual presentation of the disease with an acute hearing loss suffered immediately after prolonged use of a pneumatic drill. Case presentation A 41 year old man with no previous history of ear problems presented with a sudden loss of hearing in his right ear immediately following the prolonged use of ...
Full Text Available It has been suggested that high cholesterol levels might have adverse effects on hearing and interest- ingly statins may have beneficial effects on hearing loss. Herein, we share a dramatic improvement in acute hearing loss by statin administration in a young patient with familial hypercholesterolemia. To our knowledge this is the first report indicating the possible role of statins in patients suffering from sudden hearing loss in the context of familial hypercholesterolemia. Although the statin administra- tion as a therapeutic option for sudden hearing loss needs to be clarified in prospective studies, this case report might shed more light for possible association of dyslipidemia and hearing loss and role of statins in such cases.
Shargorodsky, Josef; Curhan, Sharon G.; Eavey, Roland; Curhan, Gary C.
Objective Hearing loss is the most common sensory disorder in the US, afflicting over 36 million people. Cardiovascular risk factors have been associated with hearing loss risk in cross-sectional studies, but prospective data are currently lacking. Methods We prospectively evaluated the association between diagnosis of hypertension, diabetes mellitus, hypercholesterolemia, smoking and body mass index (BMI) and incidence of hearing loss. Participants were 26,917 men in the Health Professionals Follow-up Study, aged 40-74 years at baseline in 1986. Study participants completed questionnaires about lifestyle and medical history every two years. Information on self-reported professionally diagnosed hearing loss and year of diagnosis was obtained from the 2004 questionnaire, and cases were defined as hearing loss diagnosed between 1986 and 2004. Multivariable-adjusted hazard ratios (HRs) were calculated using Cox proportional hazards regression models. Results 3,488 cases of hearing loss were identified. History of hypertension (HR 0.96, 95% CI 0.88-1.03), diabetes mellitus (HR 0.92, 95% CI 0.78-1.08), or obesity (HR 1.02, 95% CI 0.90-1.15 for BMI?30 compared to normal range of 19-24.9) was not significantly associated with hearing loss risk, while hypercholesterolemia (HR 1.10, 95% CI 1.02-1.18) and past smoking history (HR 1.09, 95% CI 1.01-1.17) were associated with a significantly increased risk of hearing loss after multivariate adjustment. Conclusion A history of hypertension, diabetes mellitus, or obesity is not associated with increased risk of hearing loss, while a history of past smoking or hypercholesterolemia has a small but statistically significant association with increased risk of hearing loss in adult males. PMID:20715090
Natashya H Rent
Full Text Available Purpose: To assess the characteristics of hearing loss with respect to tinnitus and to study the efficacy of various modalities of treatment of tinnitus. Design: Prospective study. Materials and Methods: Patients were assigned into three groups. All patients underwent a complete ENT examination, followed by pure tone audiometry, tinnitus matching, and tinnitus handicap inventory (THI score. Patients were treated with gingko biloba, gabapentin, or tinnitus-retraining therapy (TRT for a period of 6 weeks following which above investigations were repeated. Results: The study showed a positive correlation between tinnitus loudness matches and frequency of maximum hearing threshold (r = 0.687, P = 0.001 and a significant relation between tinnitus loudness matching and THI score (r = 0.383, P = 0.001. However, no correlations were observed between pitch match frequency and THI scores. Gingko biloba and TRT were found to be effective in the management of tinnitus (P < 0.01, but no improvement was observed with gabapentin therapy (P = 0.051. Conclusion: Tinnitus loudness matches near the threshold of frequency of maximum hearing loss, thus indicating that as threshold of hearing increases, the perception of tinnitus loudness increases. However, pitch match frequency does not affect severity of tinnitus. Gingko biloba and TRT are useful in the treatment of tinnitus.
Bobsin, Lori L; Houston, K Todd
Historically, children with hearing loss have fallen well behind their hearing peers in the areas of speech and language development, which has often limited their participation in a range of social, educational, and vocational activities. However, with early identification and appropriate intervention coupled with current hearing technology, children with hearing loss can achieve speech and language milestones at rates commensurate with hearing peers. To attain the best outcomes for these children, an early intervention system that provides thorough and unbiased information to families and allows for the efficient and coordinated efforts of qualified professionals must be present. PMID:26443489
Alzahrani, M; Tabet, P; Saliba, I
Pediatric hearing loss limits the child ability to develop effective auditory and speech capabilities. Early rehabilitation of hearing loss results in higher levels of linguistic, academic and social skills. To achieve the best outcomes, proper and timely diagnosis is essential. The etiology of hearing loss can be classified according to its nature as sensorineural hearing loss (SNHL), conductive hearing loss (CHL) or mixed hearing loss (MHL). Congenital hearing loss could be genetic or non genetic (acquired), syndromic or non-syndromic. Hearing loss can be classified according to the severity into mild (26-40 dB HL), moderate (41-70 dB HL), severe (71-90 dB HL) and profound (more than 90 dB HL). Management of hearing loss is mainly influenced by the nature, the bilaterality, the severity and the age at diagnosis. Severe to profound bilateral SNHL can be managed by cochlear implantation (unilateral or bilateral), if picked up at early age while mild to moderate bilateral SNHL are easier to manage with conventional hearing aids. CHL has less impact on the speech development of the child. It is usually managed by correcting the underlying etiology such as otitis media with effusion or even surgically in cases of external ear atresia or ossicular malformations. Unilateral SNHL have fortunately no impact on the language development of the child and can be passed undiagnosed until preschool-aged children. The implementation of national newborn hearing screening programs has improved the management of affected children by rehabilitating them at early stages to allow for normal speech development. In this review article, we aim to highlight the most common causes of pediatric hearing loss, their character and presentation and to review the diagnostic and therapeutic approaches of a deaf child. PMID:25312238
Purpose: To investigate the effectiveness of corticosteroid treatments for patients showing decreases in hearing levels after stereotactic radiotherapy for vestibular schwannoma. Methods and Materials: Twenty-one patients experienced a hearing loss in pure-tone average at greater than 20 dB or less than 10 dB within 1 year after irradiation administration of 44 Gy/22 fractions followed by a 4 Gy boost. Eight received oral prednisone at a daily dose of 30 mg, which was gradually decreased (medicated group), and 13 received none (nonmedicated group). The average observation period was 26.7±16.6 (range: 6-69) months. Results: Hearing recovery was seen after initial onset of the hearing loss in all 8 patients in the medicated group and in 2 of 13 patients in the nonmedicated group (p=0.001). The hearing recovery, that is, the change in pure-tone average (dB) at the last follow-up from the onset of hearing loss, was 9.8±6.9 dB (recovery) in the medicated group and -9.4±12.8 dB (further loss) in the nonmedicated group (p=0.0013). The hearing recovery rate, normalizing to the degree of the hearing loss before medication, was also significantly higher in the medicated group than in the nonmedicated group (p=0.0014). Conclusions: Corticosteroidal intake is suggested to be effective in improving hearing loss after stereotactic radiotherapy, at least in young patients having a useful pretreatment hearing level, if the treatment for hearing loss is administered immediately after the hearing loss is first detected
Little attention has been paid to hearing abilities and the effects of noise on the normal adolescent and young adult population. A series of studies will be presented on the prevalence of hearing loss and reported effects of hearing loss and tinnitus in adolescents and young adults from different cultural backgrounds. Adolescents and young adults from different backgrounds may tend to seek or avoid various noise environments that could be detrimental to their hearing and cause tinnitus. Attitudes and exposures to noise environments were evaluated to see if these may be correlated with their hearing losses and/or tinnitus. In addition, these adolescent and young adult subjects reported how often they used hearing protection in various noise environments. Finally, the issues of quality of life and the need for hearing conservation programs with these populations will be presented.
Full Text Available Prelingual deafness occurs with a frequency of 1 in 1000 live births and is divided into syndromic and non-syndromic forms contributing 40 and 60% respectively. Autosomal recessive non-syndromic hearing loss (ARNSHL is responsible for 80% cases of childhood deafness. Nearly all genes localized for ARNSHL cause prelingual, severe to profound, sensorineural hearing impairment. ARNSHL is genetically heterogeneous and at least 39 loci have been identified. The most significant finding to date has been the discovery of mutations in GJB2 gene at the DFNB1 locus on chromosome 13q12 as the major cause of profound prelingual deafness. This was first reported in a Tunisian family in 1994 and thereafter in many different countries. GJB2 gene encodes the gap-junction protein, connexin 26 (Cx26, mutations in which have become the first genetic marker of inherited hearing loss. Allele-specific polymerase chain reaction (AS-PCR, single stranded conformation polymorphism (SSCP and sequencing methods have been developed for the detection of mutations in Cx26 gene. In India as well, the Cx26 mutations are being screened in families with hearing impaired children using these molecular methods. Therefore, in order to create awareness among the clinicians and the affected families; we have attempted to review the Cx26 gene mutations responsible for autosomal recessive type of non-syndromic hearing loss. The efficacy and utility of Cx26 gene analysis might open the path to proper counseling of families for carrier detection and prenatal diagnosis. It may even facilitate the development of strategies in future for the treatment of this common genetic disorder.
Boisvert, Isabelle; McMahon, Catherine M; Dowell, Richard C; Lyxell, Björn
In many countries, a single cochlear implant is offered as a treatment for a bilateral hearing loss. In cases where there is asymmetry in the amount of sound deprivation between the ears, there is a dilemma in choosing which ear should be implanted. In many clinics, the choice of ear has been guided by an assumption that the reorganisation of the auditory pathways caused by longer duration of deafness in one ear is associated with poorer implantation outcomes for that ear. This assumption, however, is mainly derived from studies of early childhood deafness. This study compared outcomes following implantation of the better or poorer ear in cases of long-term hearing asymmetries. Audiological records of 146 adults with bilateral hearing loss using a single hearing aid were reviewed. The unaided ear had 15 to 72 years of unaided severe to profound hearing loss before unilateral cochlear implantation. 98 received the implant in their long-term sound-deprived ear. A multiple regression analysis was conducted to assess the relative contribution of potential predictors to speech recognition performance after implantation. Duration of bilateral significant hearing loss and the presence of a prelingual hearing loss explained the majority of variance in speech recognition performance following cochlear implantation. For participants with postlingual hearing loss, similar outcomes were obtained by implanting either ear. With prelingual hearing loss, poorer outcomes were obtained when implanting the long-term sound-deprived ear, but the duration of the sound deprivation in the implanted ear did not reliably predict outcomes. Contrary to an apparent clinical consensus, duration of sound deprivation in one ear has limited value in predicting speech recognition outcomes of cochlear implantation in that ear. Outcomes of cochlear implantation are more closely related to the period of time for which the brain is deprived of auditory stimulation from both ears. PMID:26043227
Renato de Souza, Melo; Polyanna Waleska Amorim da, Silva; Robson Arruda, Souza; Maria Cristina Falcao, Raposo; Karla Monica, Ferraz.
Full Text Available Introduction ?Head sense position is coordinated by sensory activity of the vestibular system, located in the inner ear. Children with sensorineural hearing loss may show changes in the vestibular system as a result of injury to the inner ear, which can alter the sense of head position in this popu [...] lation. Aim ?Analyze the head alignment in students with normal hearing and students with sensorineural hearing loss and compare the data between groups. Methods ?This prospective cross-sectional study examined the head alignment of 96 students, 48 with normal hearing and 48 with sensorineural hearing loss, aged between 7 and 18 years. The analysis of head alignment occurred through postural assessment performed according to the criteria proposed by Kendall et al. For data analysis we used the chi-square test or Fisher exact test. Results ?The students with hearing loss had a higher occurrence of changes in the alignment of the head than normally hearing students (p?
Liberman, Patricia Helena Pecora
Full Text Available Introduction: The neurosensory bilateral simetric hearing loss resulting of the oncological treatment is underestimated, because the patients has the hearing detection preserved, reporting complaints in determined situation, or the not comprehension of part of the message. Objective: Investigate which are the audiometric frequencies affected are the responsible by the presence of hearing complaints. Method: Prospective study evaluating 200 patients with cancer in the childhood out of the oncological treatment in at least 8 years, with average age to the diagnosis of 6,21 years (4,71. Was applied anamnesis to investigate the presence of hearing complaints and performed a tonal threshold audiometry. To check the association between the complaint and the hearing loss, was applied the Exact test of Fisher, with one error a=5%, the patients were split into: normal hearing, hearing loss in 8kHz, loss in 6-8 kHz, loss in 4-8 kHz, loss in 2-8 kHz and loss in < 1-8 kHz. Results: We found 125 patients with hearing loss, 10 presented hearing complaints. Between the patients with hearing loss, 16 presented loss only at 8kHz, and 1 with complaint; 22 with loss in 6-8 kHz, being 3 with complaint; 16 with loss in 4-8 kHz, from them 10 with complaint; 15 with loss 2-8 kHz, being 14 with complaint and 6 with loss in < 1-8 kHz all with complaints. There were a significant relationship between the loss and hearing complaint (p<0,001, when the frequency of 4 kHz was involved. Conclusion: The bigger the number of affected frequencies the bigger the occurrence of hearing complaint, most of all when the speech frequencies are involved, and the involvement of 4 kHz already determines the appearing of the complaints.
Norma de Oliveira Penido
Full Text Available A disacusia neurossensorial imunomediada (DNSI é caracterizada geralmente por uma disacusia neurossensorial bilateral, progressiva e assimétrica, acompanhada ou não por outros sintomas da orelha interna. Três pacientes com DNSI cujo quadro clínico e audiométrico eram sugestivos de doença auto-imune, e apresentaram resposta positiva à terapia imunossupressora ou pesquisa positiva de anticorpo anti hsp-70 68kD, foram estudados com relação às características clínicas, testes diagnósticos, alternativas terapêuticas e evolução da doença. Dois pacientes apresentaram quadro de disacusia neurossensorial rapidamente progressiva, associado a quadro vestibular, e outro, quadro de surdez súbita unilateral. Nenhum paciente apresentou positividade às provas reumatológicas, e apenas um paciente apresentou aumento na velocidade de hemossedimentação. Nenhum paciente obteve resposta adequada sustentada à corticoterapia, mas dois deles melhoraram com outras terapias imunossupressoras. O diagnóstico da DNSI é clínico e baseado na resposta positiva ao teste terapêutico com imunossupressores. A pesquisa de anticorpo anti-hsp70 de 68 kD pelo Western Blot é o único exame laboratorial específico para seu diagnóstico, possuindo sensibilidade de 42% e especificidade de 90%. Apenas 1 paciente apresentou positividade para este teste e não respondeu à terapia imunossupressora. Os dois pacientes com teste negativo responderam satisfatoriamente ao tratamento. A baixa sensibilidade do Western Blot e seu alto custo dificultam sua difusa utilização em nosso meio. A introdução precoce do tratamento é de suma importância por auxiliar no diagnóstico e por proporcionar um melhor prognóstico auditivo.The immunomediated sensorineural hearing loss (ISHL is characterized as an asymmetric and progressive sensorineural hearing loss. Tree patients with ISHL were studied, regarding clinical aspects, diagnostic tests, treatment options and disease evolution. They presented whether positive response to immunosuppressive therapy or positiviness to Western Blot test for hsp 70-68kD. Two patients presented rapidly progressive sensorineural hearing loss, associated to vestibular symptoms and the other presented unilateral sudden deafness. No patient reacted to rheumatological testes, and one presented increased erythrocyte sedimentation rate. None satisfactorily responded to corticotherapy, but two presented clinical improvement with other immunosuppressive therapies. The ISHL diagnosis is based on clinical aspects and on the positive response to therapeutic testes with immunosupressor drugs. The Western Blot test for hsp 70-68 kD, with 42% sensitivity and 90% specificity, is the only specific laboratorial exam for ISHL. One patient presented positiviness to this exam and did not responded to immunosuppressive therapy. Two patients with negative tests satisfactorily responded to immunosuppressive therapy. The low sensitivity and high costs of Western Blot test represent difficulties to the spread use of it. The early introduction of treatment has a major importance in the diagnosis of ISHL and to increase the auditory prognosis.
Shargorodsky, Josef; Curhan, Sharon G.; Eavey, Roland; Curhan, Gary C.
Objective Hearing loss is the most common sensory disorder in the US, afflicting over 36 million people. Higher intakes of vitamins C, E, beta carotene, B12 and folate have been proposed to reduce the risk of hearing loss. Study Design We prospectively evaluated the association between intake from foods and supplements of vitamins C, E, beta carotene, B12, and folate and the incidence of hearing loss. Setting Health Professionals Follow-up Study Subjects and Methods 26,273 men aged 40–75 years at baseline in 1986. Participants completed questionnaires about lifestyle and medical history every two years and diet every four years. Information on self-reported professionally diagnosed hearing loss and year of diagnosis was obtained from the 2004 questionnaire and cases were defined as hearing loss diagnosed between 1986 and 2004. Cox proportional hazards multivariate regression was used to adjust for potential confounders. Results There were 3,559 cases of hearing loss identified. Overall, there was no significant association between vitamin intake and risk of hearing loss. Among men 60 years and older, total folate intake was associated with a reduced risk of hearing loss; the relative risk for men ? 60 years old in the highest compared to the lowest quintile of folate intake was 0.79 (95% confidence interval 0.65–0.96). Conclusions Higher intake of vitamin C, E, B12, or beta carotene does not reduce the risk of hearing loss in adult males. Men 60 years of age and older may benefit from higher folate intake to reduce the risk of developing hearing loss. PMID:20115980
Adjamian, Peyman; Sereda, Magdalena; Zobay, Oliver; Hall, Deborah A; Palmer, Alan R
Tinnitus is an auditory phenomenon characterised by the perception of a sound in the absence of an external auditory stimulus. Chronic subjective tinnitus is almost certainly maintained via central mechanisms, and this is consistent with observed measures of altered spontaneous brain activity. A number of putative central auditory mechanisms for tinnitus have been proposed. The influential thalamocortical dysrhythmia model suggests that tinnitus can be attributed to the disruption of coherent oscillatory activity between thalamus and cortex following hearing loss. However, the extent to which this disruption specifically contributes to tinnitus or is simply a consequence of the hearing loss is unclear because the necessary matched controls have not been tested. Here, we rigorously test several predictions made by this model in four groups of participants (tinnitus with hearing loss, tinnitus with clinically normal hearing, no tinnitus with hearing loss and no tinnitus with clinically normal hearing). Magnetoencephalography was used to measure oscillatory brain activity within different frequency bands in a 'resting' state and during presentation of a masking noise. Results revealed that low-frequency activity in the delta band (1-4 Hz) was significantly higher in the 'tinnitus with hearing loss' group compared to the 'no tinnitus with normal hearing' group. A planned comparison indicated that this effect was unlikely to be driven by the hearing loss alone, but could possibly be a consequence of tinnitus and hearing loss. A further interpretative linkage to tinnitus was given by the result that the delta activity tended to reduce when tinnitus was masked. High-frequency activity in the gamma band (25-80 Hz) was not correlated with tinnitus (or hearing loss). The findings partly support the thalamocortical dysrhythmia model and suggest that slow-wave (delta band) activity may be a more reliable correlate of tinnitus than high-frequency activity. PMID:22791191
The dissertation, ”Coping with emergent hearing loss”, is written in English and is based on the diversity of problems connected to hearing loss and the adaptation of hearing aids. The research was carried out in Denmark and involves adults with an emergent hearing loss, who have decided to become hearing aid users. The data is analyzed through methods of cultural anthropology with focus on the following topics: How do the new users cope with the status passage towards being hearing aid users...
Curhan, Sharon G.; Eavey, Roland; Shargorodsky, Josef; Curhan, Gary C.
Objective Hearing loss is a common and disabling sensory disorder, yet prospective data on potentially modifiable risk factors are limited. Previous studies suggest that alcohol consumption may influence the development of hearing loss, yet results have been inconsistent. The purpose of this study was to prospectively examine the relation between alcohol use and hearing loss in men. Design We examined prospectively the independent association between alcohol intake and self-reported professionally diagnosed hearing loss in 26,809 men aged 40–74 years at baseline in 1986. Study participants completed detailed questionnaires at baseline and every two years thereafter. Incident cases of hearing loss were defined as those professionally diagnosed after 1986. Cox proportional hazards multivariate regression was used to adjust for potential confounding factors. Results During 386,081 person-years of follow-up, 3447 incident cases of hearing loss were reported. Overall, there was no association between level of alcohol intake and risk of hearing loss. Compared to those who did not consume alcohol, the multivariate-adjusted hazard ratios (95% CI) were 1.00 (0.89–1.12) for those who consumed 5.0–9.9 grams/day, 1.08 (0.96–1.21) for 10.0–14.9 grams/day, and 0.98 (0.85–1.13) for 30.0–49.9 grams/day. The results did not differ by age group or folate intake. Among those with lower intake of vitamin B12, however, higher consumption of alcohol, specifically liquor, was associated with an increased risk of hearing loss. Conclusions Our data suggest that low or moderate alcohol consumption does not influence the risk of hearing loss in older men. A possible relation between vitamin B12 intake, alcohol consumption and hearing loss merits further investigation. PMID:20802338
Danielle, Moreira; Daniela da, Silva; Priscila, Lopez; Jair Cortez, Mantovani.
Full Text Available Introduction The first locus for nonsyndromic autosomal recessive hearing loss is on chromosome 13q11-22. The 35delGmutation is present in 80% of cases in which GJB2 is involved, which makes the study of this mutation very important. The viability and benefits of screening for mutations in the conn [...] exin 26 gene are now beginning to change the diagnostic evaluation and identification of the etiology of hearing loss. Objective To investigate the occurrence of the 35delG mutation in patients with nonsyndromic sensorineural hearing loss and their first degree relatives. Methods This transversal study included 72 patients from the local hospital. The patients were divided into three groups: group A, sensorineural hearing loss (n = 58); group B, first-degree relatives of group A with sensorineural hearing loss (n = 09); and group C, first-degree relatives of patients from group A without hearing loss (n = 05). All patients had audiological evaluation and genetic testing of the 35delG mutation. Results The 35delG mutation was found in four heterozygous mutations (three of them found in the same family). The other heterozygous mutation was found in a female patient with bilateral, moderate, prelingual, sensorineural hearing loss. A single homozygous mutation was found in a male patient, with severe sensorineural hearing loss in his right ear and profound hearing loss in the left ear. Conclusions The 35delG mutation was found in 7% of the cases. The test is easy to perform and inexpensive, but it is necessary to investigate other genes related to hearing loss.
... genetics, also called a clinical geneticist or a genetics counselor For more information about hearing tests, visit the American Speech-Language-Hearing Association website . Get Help! If a parent or anyone ...
Tan, Christine M.; Lecluyse, Wendy; McFerran, Don; Meddis, Ray
Tinnitus is strongly linked with the presence of damaged hearing. However, it is not known why tinnitus afflicts only some, and not all, hearing-impaired listeners. One possibility is that tinnitus patients have specific inner ear damage that triggers tinnitus. In this study, differences in cochlear function inferred from psychophysical measures were measured between hearing-impaired listeners with tinnitus and hearing-impaired listeners without tinnitus. Despite having similar average hearin...
Full Text Available Background and Aim: Reading skill is one of the most important necessities of students' learning in everyday life. This skill is referred to the ability of comprehension, comment and conclusion from texts and receiving the meaning of the massage which is composed. Educational development in any student has a direct relation with the ability of the comprehension. This study is designed to investigate the effects of hearing loss on reading comprehension in hearing-impaired students compared to normal-hearing ones.Methods: Seventeen hearing-impaired students in 4th year of primary exceptional schools in Karaj, Robatkarim and Shahriyar, Iran, were enrolled in this cross-sectional study. Seventeen normal-hearing students were randomly selected from ordinary schools next to exceptional ones as control group. They were compared for different levels of reading comprehension using the international standard booklet (PIRLS 2001. Results: There was a significant difference in performance between hearing-impaired and normal- hearing students in different levels of reading comprehension (p<0.05.Conclusion: Hearing loss has negative effects on different levels of reading comprehension, so in exceptional centers, reconsideration in educational planning in order to direct education from memorizing to comprehension and deeper layers of learning seems necessary.
Han, Jung Ho; Kim, Dong Gyu; Chung, Hyun-Tai; Paek, Sun Ha; Jung, Hee-Won
The use of stereotactic radiosurgery (SRS) expanded to include the treatment of vestibular schwannomas (VSs) in 1969; since then, efforts to increase tumour control and to reduce cranial neuropathy have continued. Using the currently recommended marginal dose of 12-13 Gy, long-term reported outcomes after SRS include not only excellent tumour control rates of 92-100 % but also outstanding functional preservation of the trigeminal and facial nerves, with values of 92-100 % and 94-100 %, respectively. Nonetheless, hearing preservation remains in the range of 32-81 %. Previous studies have suggested possible prognostic factors of hearing preservation such as the Gardner-Robertson grade, radiation dose to the cochlea, transient volume expansion (TVE) after SRS, length of irradiated cochlear nerve, marginal dose to the tumour, and age. However, we still do not clearly understand why patients lose their hearing after SRS for VS.Relevant to these considerations, one study recently reported that the auditory brainstem response (ABR) wave V latency and waves I and V interval (IL_I-V) correlated well with intracanalicular pressure values and even with hearing level. The demonstration that ABR values, especially wave V latency and IL_I-V, correlate well with intracanalicular pressure suggests that patients with previously elevated intracanalicular pressure might have an increased chance of hearing loss on development of TVE, which has been recognised as a common phenomenon after SRS or stereotactic radiotherapy (SRT) for intracranial schwannomas.In our experience, the ABR IL_I-V increased during the first 12 months after SRS for VSs in patients who lost their serviceable hearing. The effect of increased ABR IL_I-V on hearing outcome also became significant over time, especially at 12 months after SRS, and was more prominent in patients with poor initial pure-tone average (PTA) and/or ABR values. We hypothesise that patients with considerable intracanalicular pressure at the time of SRS are prone to lose their serviceable hearing due to the added intracanalicular pressure induced by TVE, which usually occurs within the first 12 months after SRS for VSs. Using these findings, we suggested a classification system for the prediction of hearing outcomes after SRS for VSs. This classification system could be useful in the proper selection of management modalities for hearing preservation, especially in patients with only hearing ear schwannoma or neurofibromatosis type 2.Advances in diagnostic tools, treatment modalities, and optimisation of radiosurgical dose have improved clinical outcomes, including tumour control and cranial neuropathies, in patients with VSs. However, the preservation of hearing function still falls short of our expectation. A prediction model for hearing preservation after each treatment modality will guide the proper selection of treatment modalities and permit the appropriate timing of active treatment, which will lead to the preservation of hearing function in patients with VSs. PMID:26508404
Full Text Available Sudden sensorineural hearing loss (SNHL is an emergency in otolaryngological practice. The exact cause, in most of the cases cannot be found. A triad of vascular, viral, and membrane rupture are the known theories for the causation of sudden SNHL. Now various autoimmune disorders have also been suggested to play a role in the pathogenesis. Autoimmune inner ear disease in human being is an uncommon, but a distinct clinical entity. The diagnosis of the inner ear autoimmune disorder depends mainly on relatively distinct clinical course, immune laboratory tests and treatment response. The clinical picture usually consists of bilateral SNHL, bilateral reduced vestibular loss and symptoms of pressure with tinnitus and rarely tissue destruction of middle and external ear. Systemic scleroderma is an aggressive multi-system and multistage connective tissue disorder with high mortality. It is characterized by proliferative vascular lesion and marked deposition of collagen in various tissues and organs. Responses to immunosuppressive drugs are cited as evidence of an autoimmune process.
Full Text Available BACKGROUND: A Body mass index [BMI] of 25 or greater is a significant health problem associated with a variety of disorders and in adults it has been found to be a risk factor for hearing loss. Higher BMI is independently associated with increased hearing loss. We investigated the hypothesis that young adults with a BMI of 25 or more are at increased risk of mild sensorineural hearing loss. AIMS AN D OBJECTIVES: To assess hearing acuity in individuals with high BMI (?25 by audiometric assessment and compare it with the control group (BMI <25. SETTINGS AND DESIGN : A comparative and cross sectional study among volunteers residing in Bengaluru. METHODS AND MATERIAL : Data collected from 2 groups containing 30 participants each, test group contained individual with a BMI of 25 or more and the control group consisted individuals with BMI of <25, in the age group of 18 - 35 yrs. Pure tone audiometry was carried out across various frequencies (0. 5, 1, 2, 4, 6, 8 kHz in both groups. STATISTICAL ANALYSIS: Student t - test was used to compare hearing thresholds across various frequencies in both groups. RESULTS: Compared to control group, high BMI (?25 was associated with increased pure tone hearing thresholds across lower frequencies (0. 5, 1, 2 kHz. The degree of hearing loss is mild (26 - 40dB . CONCLUSIONS: This study demonstrates that young adults with a BMI of 25 or more are at increasing risk of mild sensorineural hearing loss.
Okamoto, Hidehiko; Fukushima, Munehisa; Teismann, Henning; Lagemann, Lothar; Kitahara, Tadashi; Inohara, Hidenori; Kakigi, Ryusuke; Pantev, Christo
Sudden sensorineural hearing loss is characterized by acute, idiopathic hearing deterioration. We report here the development and evaluation of "constraint-induced sound therapy", which is based on a well-established neuro-rehabilitation approach, and which is characterized by the plugging of the intact ear ("constraint") and the simultaneous, extensive stimulation of the affected ear with music. The sudden sensorineural hearing loss patients who received the constraint-induced sound therapy in addition to the standard corticosteroid therapy showed significantly better recovery of hearing function compared to those who had only received corticosteroid treatments. Additionally, the brain activity obtained in a subgroup of patients suggested that the constraint-induced sound therapy could have prevented maladaptive auditory cortex reorganization. Constraint-induced sound therapy thus appears to be an effective, practical, and safe treatment option for sudden sensorineural hearing loss. PMID:24473277
The annotated bibliography lists children's books about hearing loss, deafness, and hearing-impaired persons. The first section lists books about Helen Keller and Anne Sullivan, Keller's teacher. In section 2, each of the fiction entries features at least one major character with hearing impairment. Section 3 contains non-fiction books about…
Curhan, Sharon G.; Eavey, Roland; Shargorodsky, Josef; Curhan, Gary C.
Background Hearing loss is a common sensory disorder, yet prospective data on potentially modifiable risk factors are limited. Regularly used analgesics, the most commonly used drugs in the US, may be ototoxic and contribute to hearing loss. Methods We examined the independent association between self-reported professionally diagnosed hearing loss and regular use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), and acetaminophen in 26,917 men aged 40–74 years at baseline in 1986. Study participants completed detailed questionnaires at baseline and every two years thereafter. Incident cases of new onset hearing loss were defined as those diagnosed after 1986. Cox proportional hazards multivariate regression was used to adjust for potential confounding factors. Results During 369,079 person-years of follow-up, 3488 incident cases of hearing loss were reported. Regular use of each analgesic was independently associated with an increased risk of hearing loss. Multivariate-adjusted hazard ratios of hearing loss in regular users (2+ times/week) compared with men who used the specified analgesic <2 times/week were 1.12 (95% CI, 1.04–1.20) for aspirin, 1.21 (95% CI, 1.11–1.33) for NSAIDs, and 1.22 (95% CI, 1.07–1.39) for acetaminophen. For NSAIDs and acetaminophen, the risk increased with longer duration of regular use. The magnitude of the association was substantially higher in younger men. For men younger than age 50, the hazard ratio for hearing loss was 1.33 for regular aspirin use, 1.61 for NSAIDs, and 1.99 for acetaminophen. Conclusions Regular use of aspirin, NSAIDs, or acetaminophen increases the risk of hearing loss in men and the impact is larger on younger individuals. PMID:20193831
Wild, N J; Sheppard, S.; Smithells, R W; Holzel, H.; Jones, G.(Department of Physics, University of Warwick, Coventry, UK)
OBJECTIVE--To examine the methods used to investigate children at high risk of congenital hearing impairment, and to see whether the introduction of evoked response audiometry has reduced the mean age at which hearing loss is identified. DESIGN--Clinicians who notified children to the national congenital rubella surveillance programme were asked retrospectively to complete a questionnaire examining the methods used to identify hearing impairment and the age at testing in two consecutive five ...
Kushalnagar, Poorna; Mathur, Gaurav; Moreland, Christopher J.; Napoli, Donna Jo; Osterling, Wendy; Padden, Carol; Rathmann, Christian
Around 96 percent of children with hearing loss are born to parents with intact hearing,1 who may initially know little about deafness or sign language. Therefore, such parents will need information and support in making decisions about the medical, linguistic, and educational management of their child. Some of these decisions are time-sensitive and irreversible and come at a moment of emotional turmoil and vulnerability (when some parents grieve the toss of a normally hearing child).2 Clinic...
Curhan, Sharon G.; Shargorodsky, Josef; Eavey, Roland; Curhan, Gary C.
Use of analgesics is common and is associated with increased risk of hearing loss in men; however, the relation has not been examined prospectively in women. The authors prospectively examined the relation between frequency of aspirin, ibuprofen, and acetaminophen use and risk of hearing loss among 62,261 women aged 31–48 years at baseline (1995) in Nurses' Health Study II. The outcome was self-reported hearing loss (n = 10,012), and the follow-up period was 1995–2009. Cox proportional hazard...
Full Text Available Introduction: Hearing is essential for humans to communicate with one another. Early diagnosis of hearing loss and intervention in neonates and infants can reduce developmental problems. The aim of the present study was to assess the prevalence of hearing impairment in newborns admitted to a neonatal intensive care unit (NICU and analyze the associated risk factors. Materials and Methods: This cross-sectional study was conducted to assess the prevalence of hearing loss in neonates who were admitted to the NICU at Nemazee Hospital, Shiraz University of Medical Sciences between January 2006 and January 2007. Auditory function was examined using otoacoustic emission (OAE followed by auditory brainstem response (ABR tests. Relevant potential risk factors were considered and neonates with a family history of hearing loss and craniofacial abnormality were excluded. For statistical analysis logistic regression, the chi-squared test, and Fisher’s exact test were used. Results: Among the 124 neonates included in the study, 17 (13.7% showed hearing loss in the short term. There was a significant statistical relationship between gestational age of less than 36 weeks (P=0.013, antibiotic therapy (P= 0.033, oxygen therapy (P=0.04, and hearing loss. On the contrary, there was no significant relationship between hearing loss and use of a ventilator, or the presence of sepsis, hyperbilirubinemia, congenial heart disease, transient tachypnea of newborn, congenital pneumonia, or respiratory distress syndrome. Conclusion: Auditory function in neonates who are admitted to a NICU, especially those treated with oxygenor antibiotics and those born prematurely, should be assessed during their stay in hospital. The importance of early diagnosis of hearing loss and intervention in these neonates and avoidance of any unnecessary oxygenor antibiotic therapy needs to be further promoted.
Purpose: The rate of hearing loss in a population before and after irradiation was investigated to determine the effect of irradiation on hearing impairment. Methods and materials: In 72 patients with vestibular schwannoma who received fractionated stereotactic irradiation from 1992 to 1999, 21 had had their hearing levels examined 3 months or more before the treatment. The mean time between the initial examination and treatment was 18.6 months (range: 3-89 months), and the mean time between treatment and the last follow-up was 24.2 months (12-69 months). Thirty-six to 50 Gy in 20-25 fractions over 5 to 6 weeks was given using an X-ray beam from a linear accelerator. Pure tone average (PTA) was measured using the mean hearing level at five frequencies, and the annual rate of hearing loss was defined as [(hearing loss in PTA(dB))/(follow-up period (months)x12)]. Results: The actual cumulative curve of decrease in tumor size of 2 mm or more was 38.3% at 2 years and 80.0% at 3 years. The mean of hearing loss in PTA was 11.6±10.3 dB (-1 to 35 dB) from the initial examination to the start of irradiation and 11.9±14.4 dB (-14 to 37 dB) from the start of irradiation to the last follow-up. The mean annual rates of hearing loss before irradiation and in the 1st, 2nd, 3rd and 4th years after irradiation were, respectively, 18.6, 11.2, 6.2, 5.1, and 5.0 dB/year. The annual rates of hearing loss in the 2nd year (P=0.025) and 3rd year (P=0.018) were significantly slower than the rate before irradiation. Conclusions: The mean annual rate of hearing loss was higher before irradiation than after irradiation, and hearing loss slowed rather than accelerated after irradiation. Although hearing loss after the treatment was usually permanent, fractionated stereotactic irradiation was suggested to be effective to lower the rate of hearing loss
Fereczkowski, Michal; Jepsen, Morten LØve
It has been suggested that the level corresponding to the knee-point of the basilar membrane (BM) input/output (I/O) function can be used to estimate the amount of inner- and outer hair-cell loss (IHL, OHL) in listeners with a moderate cochlear hearing impairment Plack et al. (2004). According to Jepsen and Dau (2011) IHL + OHL = HLT [dB], where HLT stands for total hearing loss. Hence having estimates of the total hearing loss and OHC loss, one can estimate the IHL. In the present study, results from forward masking experiments based on temporal masking curves (TMC; Nelson et al., 2001) are presented and used to estimate the knee-point level and the compression ratio of the I/O function. A time-efficient paradigm based on the single-interval-up-down method (SIUD; Lecluyse and Meddis (2009)) was used. In contrast with previous studies, the present study used only on-frequency TMCs to derive estimates of the knee-point level. Further, it is explored whether it is possible to estimate the compression ratio using only on-frequency TMCs. 10 normal-hearing and 10 hearing-impaired listeners (with mild-to-moderate sensorineural hearing loss) were tested at 1, 2 and 4 kHz. The results showed a reasonable reliability and may be applicable to individualized hearing-aid fitting. © 2013 Acoustical Society of America.
... children in the United States. Tables, Charts and Graphs Chart depicting how a 25 year old carpenter ... Topics Agriculture Construction Firing Ranges Hearing Loss in Mining NIOSH Homepage NIOSH A-Z Workplace Safety & Health ...
Warrier, Rajasekharan; Chauhan, Aman; Davluri, Murali; Tedesco, Sonya L.; Nadell, Joseph; Craver, Randall
Background: High doses of cisplatin and cranial radiotherapy (CRT) have been reported to cause irreversible hearing loss. The objective of this study was to examine the influence of cranial irradiation on cisplatin-associated ototoxicity in children with pediatric malignancies.
Peleva, Emilia; Aloy, Emilie; Carret, Anne-Sophie; Daniel, Sam J
Cisplatin is a commonly-used chemotherapeutic agent that is highly-effective against a variety of pediatric cancers. Unfortunately, it may lead to ototoxicity, with serious consequences on the quality of life of survivors. Patients remain at risk of progression of ototoxicity even after completion of treatment. We report the case of a medulloblastoma survivor with previously documented normal hearing, who developed significant hearing loss and tinnitus following exposure to excessive noise at a nightclub three years after completion of treatment. We highlight the importance of long-term audiological follow up and education about the increased risk of hearing loss in this population. PMID:25439704
Huh, Hee Jae; Park, Kyoung-Jin; Jang, Ja-Hyun; Lee, Mina; Lee, Jang Ho; Ahn, Yoon Hee; Kang, Cheol-In; Ki, Chang-Seok; Lee, Nam Yong
Streptococcus suis infection is an emerging zoonosis in Asia. The most common disease manifestation is meningitis, which is often associated with hearing loss and cochleovestibular signs. S. suis infection in humans mainly occurs among risk groups that have frequent exposure to pigs or raw pork. Here, we report a case of S. suis meningitis in a 67-yr-old pig carcass handler, who presented with dizziness and sensorineural hearing loss followed by headaches. Gram-positive diplococci were isolat...
Full Text Available We examined the prevalence, severity, etiology, and treatment of audiology problems among Operation Iraqi Freedom/Operation Enduring Freedom (OIF/OEF Veterans with mild traumatic brain injury (TBI. A retrospective chart review was performed of 250 Veterans with mild TBI. Results of a comprehensive second-level mild TBI evaluation and subsequent visits to audiology were evaluated. We found the vast majority (87% of Veterans reported some level of hearing disturbance and those involved in blast injuries reported a higher incidence of hearing disturbance than those with other injury etiologies. Audiology referrals were given to 75 Veterans and 37 attended. At this visit, Veterans reported tinnitus (75.7% and hearing loss (59.8%. Nearly half (48.6% of Veterans were diagnosed with conductive hearing loss, sensorineural hearing loss, or central auditory dysfunction. An additional 24.3% of Veterans had subclinical levels of auditory dysfunction. Our study has highlighted the increased prevalence of hearing loss among OIF/OEF Veterans and, thus, the need for appropriate referrals and treatment. Strategies to address perceived stigma associated with hearing loss may increase attendance at follow-up visits. Additionally, while only a third of audiograms were found to be abnormal, advanced testing resulted in a significant percentage of our population being diagnosed with auditory dysfunction.
McKee, Michael M; Moreland, Christopher; Atcherson, Samuel R; Zazove, Philip
Hearing loss impairs health care communication and adversely affects patient satisfaction, treatment adherence, and use of health services. Hearing loss is the third most common chronic health condition among older patients after hypertension and arthritis, but only 15% to 18% of older adults are screened for hearing loss during health maintenance examinations. Patients with hearing loss may be reluctant to disclose it because of fear of ageism, perceptions of disability, and vanity. Lipreading and note writing often are ineffective ways to communicate with deaf and hard of hearing (DHH) patients who use American Sign Language; use of medical sign language interpreters is preferred. A variety of strategies can improve the quality of health care communication for DHH patients, such as the physician facing the patient, listening attentively, and using visual tools. Physicians should learn what hearing loss means to the DHH patient. Deaf American Sign Language users may not perceive hearing loss as a disability but as a cultural identity. Patients' preferred communication strategies will vary. Relay services, electronic communication, and other telecommunications methods can be helpful, but family physicians and medical staff should learn from each DHH patient about which communication strategies will work best. PMID:26161525
James E Tobih
Results: A total of 53 patients, with the majority (92.5% resulted from acquired causes of which 88.7% were due to birth asphyxia. Over 73% presented with moderately severe to profound hearing loss. Only 15% had a hearing aid fitted, 22.6% will require cochlear implant, while 43.3% could not afford a hearing aid. Conclusion: Developing countries are noted for a higher prevalence of acquired and preventable causes of childhood hearing loss. Primary prevention through effective obstetric care, public enlightenment, incorporation of universal hearing screening programs into the national policies, and readily available and affordable rehabilitative facilities are advised. [Arch Clin Exp Surg 2014; 3(4.000: 226-232
Adult-onset hearing loss affects more than 20% of citizens in the US and in the EU. This second most frequent disability (World Health Organization 2001) is mostly due to aging and noise exposure ('sensorineural'). Although usage of hearing aids effectively increases life quality (Joore et al. 2003; Anteunis 2002), in many western countries, only 15% of those who could benefit from this technology use it, e.g. in the USA, Switzerland, and Finland (Bisgaard 2009). Technological innovation has not helped improve uptake. A longitudional interview study indicates that one barrier to hearing aid acceptance seems to lie in healthcare interactions: 88% of patients with hearing loss accessing the German healthcare system do not complete rehabilitation; the average time between first diagnosis and use of hearing aids is 8-10 years (Meis & Gabriel 2006). The present study contributes to an emering body of CA work on healthcare encounters with hearing loss which show that communication problems occur frequently between healthcare professionals and patients (e.g. Skelt 2006, Laakso 2011-2014, Ruusuvuori 2011-2014; Brouwer 2012, Heinemann et al. 2012, Egbert 2013). The presentation, based on 12 hours of naturally-occurring, video-taped audiological interactions in German, focuses on a specific communication problem which is due to an asymmetricity in "epistemic domains" (Stivers & Rossano 2010:8) in that divergences in the professional's and the patients' conceptualizations of hearing emerge and are frequently not resolved. The goal of these audiological consulations is to select and fit the best possible hearing aid for clients with hearing loss. In order to achieve this goal, audiologists routinely rely on their technological and medical knowledge, the results of a pure-tone audiogram, and the clients' subjective descriptions of hearing experiences in different environments. In these consultations, the institutional conceptualization of hearing (and thus of hearing loss) is that of an objectively measurable functioning of the ear, categorized in an audiogram by decibels and hertz. In contrast, persons with hearing loss perceive of their hearing, even during audiograms, as less precise and more varied. When asked by the audiologist about hearing experiences in different settings (e.g. dyadic conversation, multiperson interaction, telephone, outdoors, train station), the descriptions by clients are diffuse, broad, and metaphorical. Compared to visual impairment, describing hearing seems to be more difficult, and frequently, persons with hearing impairment resort to visual metaphors. A CA examination of conversational order in the areas of turn-taking, sequence, repair, topic, multimodality, and linguistic resources yields partial results for these audiological data, and including epistemics in the analysis achieves to 'grasp' the phenomenon more fully. CA research "into epistemics focuses on the knowledge claims that interactants assert, contest and defend in and through turns-at-talk and sequences of interaction” (Heritage 2013:370). Given that the audiologist and the patient frequently do not achieve a shared knowledge of the patient's hearing loss, these institutional encounters appear to be highly problematic in that the imbalance is not resolved. “(W)hen a speaker indicates that there is an imbalance of information between speaker and hearer, this indication is sufficient to motivate and warrant a sequence of interaction that will be closed when the imbalance is acknowledged as equalized for all practical purposes” (Heritage 2012: 32). The presentation concludes with connecting the interactional problems at the micro-level of direct healthcare encounters to the macro-level and globel problems of the impact of untreated hearing loss. The social repercussions are stigmatization, miscommunication, loss of work, social isolation, depression, and suicide (Carmen 2001). The financial loss per person dropping out of work due to hearing loss is estimated at 200,000 US Dollars (World Health Organization 2001). In Europe, the econmi
Walker, Elizabeth A.; Spratford, Meredith; Moeller, Mary Pat; Oleson, Jacob; Ou, Hua; Roush, Patricia; Jacobs, Shana
Purpose: This study investigated predictors of hearing aid (HA) use time for children with mild-to-severe hearing loss (HL). Barriers to consistent HA use and reliability of parent report measures were also examined. Method: Participants included parents of 272 children with HL. Parents estimated the amount of time the child used HAs daily.…
... salesperson who spends the workday on the phone. Hearing aids of various sizes may be worn behind the ear, in the ear or completely in the ear canal. Some include directional microphones, which allows sound coming from a specific direction ...
Full Text Available Introduction: Children learn to communicate by hearing sounds. If there is hearing loss, the cognitive and speaking abilities and language learning will deteriorate. Early detection and intervention are important factors in the successful treatment of hearing loss in children. Hearing loss (HL is divided into two main groups: conductive hearing loss (CHL and sensorineural hearing loss (SNHL, the prevalence of the former being higher in children, many whose causes are easy to detect and treat. Material and Methods: In this descriptive, cross-sectional study, 785 children, aged 6-7 years, entering elementary school Grade 1 in the school year 2010/2011, were randomly selected from 10% of Ahwaz Hearing Loss Screening Centers, and their audiograms were studied. The collected data were analyzed using SPSS and descriptive statistics. Results: Out of the 785 preschool children examined in this study, 77 children (9.8% suffered from HL (42.9% female and 57.1% male, 59.7% from CHL, and 40.3% from SNHL. Twenty-six percent suffered from bilateral HL and 74% from unilateral HL. Thirty-eight point ninety-six percent had abnormal tympanometry, 61% of whom were Type B. Most of the children (53% had mild HL. Thirty-one point two percent of parents were aware of their children's HL. Conclusion: Considering the high prevalence of HL, especially SNHL, in this study, which is usually permanent but detectable at the neonatal ages, raising public awareness and early screening of ear diseases, which can lead to the detection and treatment in most cases, seem to be vital.
Brown, Kerry K.; Viana, Lucas M; Helwig, Cecilia C.; Artunduaga, Maria A.; Quintanilla-Dieck, Lourdes; Jarrin, Patricia; Osorno, Gabriel; McDonough, Barbara; DePalma, Steven R.; Eavey, Roland D; Seidman, Jonathan G.; Seidman, Christine E.
Microtia is a rare, congenital malformation of the external ear that in some cases has a genetic etiology. We ascertained a three-generation family with bilateral microtia and hearing loss segregating as an autosomal dominant trait. Exome sequencing of affected family members detected only seven shared, rare, heterozygous, nonsynonymous variants, including one protein truncating variant, a HOXA2 nonsense change (c.703C>T, p.Q235*). The HOXA2 variant was segregated with microtia and hearing lo...
Lauris, José Roberto Pereira; Basso, Talita Costa; Marinelli, Érica Juliana Innocenti; Otubo, Karina Aki; Lopes, Andréa Cintra
Introduction: Studies on the occupational exposure show that noise has been reaching a large part of the working population around the world, and NIHL (noise-induced hearing loss) is the second most frequent disease of the hearing system. Objective: To review the audiometry results of employees at the campus of the University of São Paulo, Bauru. Method: 40 audiometry results were analyzed between 2007 and 2008, whose ages comprised between 32 and 59 years, of both sexes and several professio...
Kumar, Aman; Sinha, Amrita; Al-Waa, Ahmad M.
We report a case of sudden unilateral sensorineural hearing loss of sudden onset during an aeroplane flight, which completely resolved during a roller coaster ride at Alton Towers theme park. A review of the literature concerning sudden idiopathic sensorineural hearing loss and spontaneous resolution are discussed. Initially, pure-tone audiometry showed a profound sensorineural hearing loss in the right ear and mild sensorineural hearing loss in the left ear (of note, the hearing was normal p...
Okhovat, Saleh; Fox, Richard; Magill, Jennifer; Narula, Antony
A 33-year-old man developed profound sudden onset right-sided hearing loss with tinnitus and vertigo, within 24?h of pretravel rabies vaccination. There was no history of upper respiratory tract infection, systemic illness, ototoxic medication or trauma, and normal otoscopic examination. Pure tone audiograms (PTA) demonstrated right-sided sensorineural hearing loss (thresholds 90-100?dB) and normal left-sided hearing. MRI internal acoustic meatus, viral serology (hepatitis B, C, HIV and cytomegalovirus) and syphilis screen were normal. Positive Epstein-Barr virus IgG, viral capsid IgG and anticochlear antibodies (anti-HSP-70) were noted. Initial treatment involved a course of high-dose oral prednisolone and acyclovir. Repeat PTAs after 12?days of treatment showed a small improvement in hearing thresholds. Salvage intratympanic steroid injections were attempted but failed to improve hearing further. Sudden onset sensorineural hearing loss (SSNHL) is an uncommon but frightening experience for patients. This is the first report of SSNHL following rabies immunisation in an adult. PMID:26670892
Moreland, Christopher; Atcherson, Samuel R; Zazove, Philip; McKee, Michael M
Hearing loss can lead to impairments in language and speech acquisition, educational attainment, social development, and reading achievement. More than 90% of deaf and hard of hearing (DHH) children are born to hearing parents who may lack the knowledge or experience to effectively care for a child with hearing loss. Family involvement is crucial for teaching self-advocacy and global communication skills, optimizing social development, and helping DHH individuals understand and manage external attitudes about deafness and hearing loss. American Sign Language is a naturally developed language with an always-expanding lexicon and grammatical structures different from those of English. Teaching spoken English and American Sign Language equally, often called bilingual bimodal education, can enhance academic and reading achievement as well as language and psychosocial development. Formal schooling options for a DHH child include enrollment in a public or private school system (often called inclusion, integration, or mainstreaming), a school for the deaf, or a bilingual school. Individuals with hearing loss experience stereotypes and biases that create disparities in health insurance coverage, health care access, and outcomes of mental and physical conditions. Family physicians should recognize and minimize biases to improve health care in the DHH community. PMID:26161526
Ohki, Masafumi; Ishikawa, Jyunichi; Tahara, Atsushi
Deployment of the air bag in a passenger vehicle accident rarely causes otologic injuries. However, sensorineural hearing loss induced by air bag deployment is extremely rare, with only a few cases reported in the English literature. A 38-year-old man involved in a traffic accident while driving his car at 40?km/hour presented with right sensorineural hearing loss and tinnitus, without associated vertigo. Pure-tone audiometry demonstrated elevated thresholds of 30?dB and 25?dB at 4?kHz and 8?kHz, respectively, on the right side. Air bag deployment in car accidents is associated with the risk of development of sensorineural hearing loss. PMID:22953102
Agnieszka J. Szczepek
Full Text Available Tinnitus disturbs lives and negatively affects the quality of life of about 2% of the adult world population. Research has shown that the main cause of tinnitus is hearing loss. To analyze a possible association of the degree of hearing loss with the severity of tinnitus, we have performed a retrospective study using admission data on 531 patients suffering from chronic tinnitus. We have found that 83% of our tinnitus patients had a high frequency hearing loss corresponding to a noise-induced hearing loss (NIHL. There was a significant correlation between the mean hearing loss and the tinnitus loudness (p < 0.0001. Interestingly, patients suffering from decompensated chronic tinnitus had a greater degree of hearing loss than the patients with compensated form of tinnitus. In addition, we demonstrate that the degree of hearing loss positively correlates with the two subscales (“intrusiveness” and “auditory perceptional difficulties” of the Tinnitus Questionnaire. Our retrospective study provides indirect evidence supporting the hypothesis that the degree of noise-induced hearing loss influences the severity of tinnitus.
Eliene da Silva Araújo
Full Text Available PURPOSE: To investigate the occurrence of hearing loss in individuals with HIV/AIDS and their characterization regarding type and degree. RESEARCH STRATEGY: It was conducted a systematic review of the literature found on the electronic databases PubMed, EMBASE, ADOLEC, IBECS, Web of Science, Scopus, Lilacs and SciELO. SELECTION CRITERIA: The search strategy was directed by a specific question: "Is hearing loss part of the framework of HIV/AIDS manifestations?", and the selection criteria of the studies involved coherence with the proposed theme, evidence levels 1, 2 or 3, and language (Portuguese, English and Spanish. DATA ANALYSIS: We found 698 studies. After an analysis of the title and abstract, 91 were selected for full reading. Out of these, 38 met the proposed criteria and were included on the review. RESULTS: The studies reported presence of conductive, sensorineural, and mixed hearing loss, of variable degrees and audiometric configurations, in addition to tinnitus and vestibular disorders. The etiology can be attributed to opportunistic infections, ototoxic drugs or to the action of virus itself. The auditory evoked potentials have been used as markers of neurological alterations, even in patients with normal hearing. CONCLUSION: HIV/AIDS patients may present hearing loss. Thus, programs for prevention and treatment of AIDS must involve actions aimed at auditory health.
Curhan, Sharon G.; Shargorodsky, Josef; Eavey, Roland; Curhan, Gary C.
Use of analgesics is common and is associated with increased risk of hearing loss in men; however, the relation has not been examined prospectively in women. The authors prospectively examined the relation between frequency of aspirin, ibuprofen, and acetaminophen use and risk of hearing loss among 62,261 women aged 31–48 years at baseline (1995) in Nurses' Health Study II. The outcome was self-reported hearing loss (n = 10,012), and the follow-up period was 1995–2009. Cox proportional hazards regression was used to adjust for potential confounders. During 764,247 person-years of follow-up, ibuprofen use and acetaminophen use were independently associated with increased risk of hearing loss, but aspirin use was not. For ibuprofen, the multivariate-adjusted relative risk of hearing loss was 1.13 (95% confidence interval (CI): 1.06, 1.19) for use 2–3 days/week, 1.21 (95% CI: 1.11, 1.32) for use 4–5 days/week, and 1.24 (95% CI: 1.14, 1.35) for use ?6 days/week (P-trend < 0.0001), compared with use less than once per week. For acetaminophen, the corresponding relative risks were 1.11 (95% CI: 1.02, 1.19), 1.21 (95% CI: 1.07, 1.37), and 1.08 (95% CI: 0.95, 1.22), respectively (P-trend = 0.0007). In this study, use of ibuprofen or acetaminophen (but not aspirin) 2 or more days per week was associated with an increased risk of hearing loss in women. PMID:22933387
Daniel Paganini, Inoue; Eduardo Amaro, Bogaz; Flávia, Barros; Norma de Oliveira, Penido.
Full Text Available Inúmeros métodos de análise da recuperação auditiva na perda auditiva neurossensorial súbita idiopática (PANSI) dificultam a comparação adequada dos diversos tratamentos encontrados na Literatura. OBJETIVO: Comparar diversos critérios de recuperação auditiva na PANSI, baseados na Literatura. MATERIA [...] L E MÉTODO: Foi realizado um estudo clínico observacional de coorte, a partir de um protocolo prospectivo, em pacientes com PANSI, atendidos entre 2000 e 2010. Foram comparados cinco critérios de recuperação auditiva significativa e quatro critérios para recuperação completa, pela audiometria tonal, por meio de teste não paramétrico e de comparações múltiplas, ambos com um nível de significância de 5%. Após determinação do critério de recuperação auditiva mais rígido, foram adicionados parâmetros da audiometria vocal. RESULTADOS: Houve diferença significativa, entre esses critérios (p Abstract in english The countless methods available to analyze hearing recovery in idiopathic sudden sensorineural hearing loss (ISSHL) cases hinder the comparison of the various treatments found in the literature. OBJECTIVE: This paper aims to compare the different criteria for hearing recovery in ISSHL found in the l [...] iterature. MATERIALS AND METHODS: This is an observational clinical cohort study from a prospective protocol in patients with ISSHL, treated between 2000 and 2010. Five criteria were considered for significant hearing recovery and four for complete recovery by pure tone audiometry, using non-parametric tests and multiple comparisons at a significance level of 5%. After determining the stricter criteria for hearing recovery, vocal audiometry parameters were added. RESULTS: There was a significant difference between the criteria (p
Under normal hearing conditions, comparisons of the sounds reaching each ear are critical for accurate sound localization. Asymmetric hearing loss should therefore degrade spatial hearing and has become an important experimental tool for probing the plasticity of the auditory system, both during development and adulthood. In clinical populations, hearing loss affecting one ear more than the other is commonly associated with otitis media with effusion, a disorder experienced by approximately 8...
Leibold, Lori J.; Hillock-Dunn, Andrea; Duncan, Nicole; Roush, Patricia A; Buss, Emily
This study compared spondee identification performance in presence of speech-shaped noise or two competing talkers across children with hearing loss and age-matched children with normal hearing. The results showed a greater masking effect for children with hearing loss compared to children with normal hearing for both masker conditions. However, the magnitude of this group difference was significantly larger for the two-talker compared to the speech-shaped noise masker. These results support ...
Full Text Available Noise is the insidious of all industrial pollutants, involving every industry and causing severe hearing loss in every country in the world. Exposure to excessive noise is the major avoidable cause of permanent hearing impairment. Worldwide, 16% of the disabling hearing loss in adults is attributed to occupational noise, ranging from 7 to 21% in the various subregions. The estimated cost of noise to developed countries ranges from 0.2 to 2% of the gross domestic product (GDP. Noise-induced hearing loss (NIHL is bilateral and symmetrical, usually affecting the higher frequencies (3k, 4k or 6k Hz and then spreading to the lower frequencies (0.5k, 1k or 2k Hz. Other major health effects are lack of concentration, irritation, fatigue, headache, sleep disturbances, etc. The major industries responsible for excessive noise and exposing workers to hazardous levels of noise are textile, printing, saw mills, mining, etc. Hearing protectors should be used when engineering controls and work practices are not feasible for reducing noise exposure to safe levels. Earmuffs, ear plugs and ear canal caps are the main types of hearing protectors. In India, NIHL has been a compensable disease since 1948. It is only in 1996 that the first case got compensation. Awareness should be created among workers about the harmful effects of noise on hearing and other body systems by implementing compulsory education and training programs. There are very few published studies of NIHL in India. More extensive studies are needed to know the exact prevalence of NIHL among the various industries in India.
Curhan, Sharon G.; Eavey, Roland; Wang, Molin; Stampfer, Meir; Curhan, Gary C.
BACKGROUND Acquired hearing loss is highly prevalent, but prospective data on potentially modifiable risk factors are limited. In cross-sectional studies, higher body mass index (BMI), larger waist circumference, and lower physical activity have been associated with poorer hearing, but these have not been examined prospectively. METHODS We examined the independent associations between BMI, waist circumference and physical activity and self-reported hearing loss in 68,421 women in the Nurses’ Health Study II from 1989 to 2009. Baseline and updated information on BMI, waist circumference and physical activity was obtained from biennial questionnaires. RESULTS After more than 1.1 million person-years of follow-up, 11,286 cases of hearing loss were reported to have occurred. Higher BMI and larger waist circumference were associated with increased risk of hearing loss. Compared with women with BMI 88 cm was 1.27 (95% CI 1.17, 1.38). Higher physical activity was inversely related to risk; compared with women in the lowest quintile of physical activity, the multivariate-adjusted RR for women in the highest quintile was 0.83 (95% CI 0.78,0.88). Walking 2 hours per week or more was inversely associated with risk. Simultaneous adjustment for BMI, waist circumference and physical activity slightly attenuated the associations but they remained statistically significant. CONCLUSIONS Higher BMI and larger waist circumference are associated with increased risk and higher physical activity is associated with reduced risk of hearing loss in women. These findings provide evidence that maintaining healthy weight and staying physically active, potentially modifiable lifestyle factors, may help reduce the risk of hearing loss. PMID:24125639
Tharpe, Anne Marie; Gustafson, Samantha
Any degree of hearing loss can have a negative impact on child development. The amount of impact is largely determined by the type, quality, and timeliness of intervention. Early identification and management of hearing loss is essential for minimizing the impact of hearing loss and ensuring that children can reach their cognitive, linguistic, educational, and social potential. Advances in hearing technology and broadening of candidacy for same, have resulted in improved outcomes for many children with hearing loss. Through ongoing hearing monitoring throughout childhood, children with congenital, late-onset, or progressive losses can receive timely management from interprofessional, collaborative teams. PMID:26433444
Pelegrin, Armando Carballo; Canuet, Leonides; Rodríguez, Ángeles Arias; Morales, Maria Pilar Arévalo
The purpose of our study was to identify the main factors associated with objective noise-induced hearing loss (NIHL), as indicated by abnormal audiometric testing, in Spanish workers exposed to occupational noise in the construction industry. We carried out a prospective study in Tenerife, Spain, using 150 employees exposed to occupational noise and 150 age-matched controls who were not working in noisy environments. The variables analyzed included sociodemographic data, noise-related factors, types of hearing protection, self-report hearing loss, and auditory-related symptoms (e.g., tinnitus, vertigo). Workers with pathological audiograms had significantly longer noise-exposure duration (16.2 ± 11.4 years) relative to those with normal audiograms (10.2 ± 7.0 years; t = 3.99, P work and noise-exposure duration are best predictive factors of NIHL. Auditory-related symptoms and self-report hearing loss do not represent good indicators of objective NIHL. Routine monitoring of noise levels and hearing status are of great importance as part of effective hearing conservation programs. PMID:26356377
Brady, Nancy C.; Bashinski, Susan M.
Nine children with complex communication needs and concurrent vision and hearing losses participated in an intervention program aimed at increasing intentional prelinguistic communication. The intervention constituted a pilot, descriptive study of an adapted version of prelinguistic milieu teaching, hence referred to as A-PMT. In A-PMT, natural…
Mellon, Nancy K.; Ouellette, Meredith; Greer, Tracy; Gates-Ulanet, Patricia
Children with hearing loss, with early and appropriate amplification and intervention, demonstrate gains in speech, language, and literacy skills. Despite these improvements many children continue to exhibit disturbances in cognitive, behavioral, and emotional control, self-regulation, and aspects of executive function. Given the complexity of developmental learning, educational settings should provide services that foster the growth of skills across multiple dimensions. Transdisciplinary int...
David M. Nondahl, MS
Full Text Available The Epidemiology of Hearing Loss Study (EHLS conducted in Beaver Dam, Wisconsin, was a population-based study that focused on the prevalence of hearing loss among 3,753 participants between 1993 and 1995. This article reports the results of several auditory measures from 999 veteran and 590 nonveteran males 48 to 92 years of age included in the EHLS. The auditory measures included pure tone thresholds, tympanometry and acoustic reflexes, word recognition in quiet and in competing message, and the Hearing Handicap Inventory for the Elderly-Screening (HHIE-S version. Hearing loss in the auditory domains of pure tone thresholds, word recognition in quiet, and word recognition in competing message increased with age but were not significantly different for the veterans and nonveterans. No significant differences were found between participant groups on the HHIE-S; however, regarding hearing aid usage, mixed differences were found.
Choi, Yoon-Hyeong; Miller, Josef M; Tucker, Katherine L; Hu, Howard; Park, Sung Kyun
Background: The protective effects of antioxidant vitamins on hearing loss are well established in animal studies but in few human studies. Recent animal studies suggest that magnesium intake along with antioxidants may act in synergy to prevent hearing loss.
Our objective was to evaluate the frequency of contrast enhancement of the endolymphatic sac in patients with sudden hearing loss. Forty consecutive patients with sudden sensorineural hearing loss (20 males and 20 females; age range 11-82 years), 40 age-matched control subjects, and 5 patients with Meniere's disease were examined using the same imaging protocol on a 1.5-T MR system. Pre- and post-contrast-enhanced T1-weighted 3D spoiled gradient-echo sequence (3D SPGR; TR/TE=23/10 ms, no. of excitations=1, flip angle=30 ) images were obtained using a voxel size of 0.6 x 0.7 x 0.8 mm3. Contrast enhancement in the area of the endolymphatic sac was assessed by two radiologists, and the frequency of contrast enhancement was compared between the three study groups. Enhancement of the ipsilateral endolymphatic sac was observed in 30 of the 40 patients with sudden hearing loss (75%). Twenty of these 30 patients also showed enhancement on the contralateral side, and 1 patient showed enhancement only on the contralateral side. Only 1 of the 5 patients with Meniere's disease showed enhancement. Nine of the 40 control subjects (22.5%) showed enhancement (bilateral enhancement in 5 subjects, unilateral in 4). The frequency of enhancement in patients with sudden hearing loss was significantly higher than that in control subjects (P<0.0001) or patients with Meniere's disease (P<0.05). The frequency of contrast enhancement of the endolymphatic sac is significantly increased in patients with sudden hearing loss, but further study is necessary to clarify the relationship between this finding and the pathophysiology of sudden hearing loss. (orig.)
Scheidt, Ryan E.; Kale, Sushrut; Heinz, Michael G.
Auditory-nerve fibers demonstrate dynamic response properties in that they adapt to rapid changes in sound level, both at the onset and offset of a sound. These dynamic response properties affect temporal coding of stimulus modulations that are perceptually relevant for many sounds such as speech and music. Temporal dynamics have been well characterized in auditory-nerve fibers from normal-hearing animals, but little is known about the effects of sensorineural hearing loss on these dynamics. This study examined the effects of noise-induced hearing loss on the temporal dynamics in auditory-nerve fiber responses from anesthetized chinchillas. Post-stimulus time histograms were computed from responses to 50-ms tones presented at characteristic frequency and 30 dB above fiber threshold. Several response metrics related to temporal dynamics were computed from post-stimulus-time histograms and were compared between normal-hearing and noise-exposed animals. Results indicate that noise-exposed auditory-nerve fibers show significantly reduced response latency, increased onset response and percent adaptation, faster adaptation after onset, and slower recovery after offset. The decrease in response latency only occurred in noise-exposed fibers with significantly reduced frequency selectivity. These changes in temporal dynamics have important implications for temporal envelope coding in hearing-impaired ears, as well as for the design of dynamic compression algorithms for hearing aids. PMID:20696230
Schmidt, J. H.; Pedersen, E. R.
OBJECTIVES: The objectives of this study were to: (1) estimate the hearing status of classical symphony orchestra musicians and (2) investigate the hypothesis that occupational sound exposure of symphony orchestra musicians leads to elevated hearing thresholds. DESIGN: The study population comprised all the musicians from five symphony orchestras. Questionnaires were filled in by 337 subjects, and 212 subjects performed an audiometric test. For a group of 182 musicians (363 ears) the results of the audiometry was analyzed in relation to the individual exposure, which was estimated on the basis of sound measurements and questionnaire data regarding the exposure time. The mean hearing threshold at the frequencies 3, 4, and 6 kHz, corrected for age and sex, was used as outcome. RESULTS: The musician ears with the highest exposure (29 of 363) had an additional threshold shift of 6.3 dB compared with the 238 ears with lowest exposure. The observed hearing loss of musicians was smaller compared with the noise-induced permanent threshold shift (NIPTS) predicted from ISO1999. A remaining confounding effect of age after ISO7029 age corrections could be observed to explain the difference in observed and predicted NIPTS. However, the observed hearing loss difference between the left and the right ear of musicians was 2.5 dB (95% confidence interval 1.5-3.6), which was similar to the NIPTS predicted from ISO1999. Most of the musicians had better hearing at 3, 4, and 6 kHz for age than expected, however, 29 ears with the highest exposure above 90.4 dBA with a mean exposure time of 41.7 years had significantly elevated hearing thresholds. Trumpet players and the left ear of first violinists had significantly elevated hearing thresholds compared with other musicians. CONCLUSION: Most of the symphony orchestra musicians had better hearing than expected but they had a work-related risk of developing additional noise-induced hearing loss. The additional NITPS of the left ear compared with the right ear was at the expected level based on the cumulated sound exposure and ISO1999, indicating that performing music may induce hearing loss to the same extent as industrial noise.
Oshima, Kazuo; Suchert, Steffen; BLEVINS, Nikolas H.; Heller, Stefan
Millions of patients are debilitated by hearing loss, mainly caused by degeneration of sensory hair cells in the cochlea. The underlying reasons for hair cell loss are highly diverse, ranging from genetic disposition, drug side effects, traumatic noise exposure, to the effects of aging. Whereas modern hearing aids offer some relief of the symptoms of mild hearing loss, the only viable option for patients suffering from profound hearing loss is the cochlear implant. Despite their successes, he...
Worsøe, Lise Lotte; Brandt, C.T.; Lund, S.P.; Andersen, Christian Østergaard; Thomsen, J.; Caye-Thomasen, P.
Sensorineural hearing loss is a common complication of pneumococcal meningitis. Treatment with corticosteroids reduces inflammatory response and may thereby reduce hearing loss. However, both experimental studies and clinical trials investigating the effect of corticosteroids on hearing loss have generated conflicting results. The objective of the present study was to determine whether systemic steroid treatment had an effect on hearing loss and cochlear damage in a rat model of pneumococcal men...
Axelsson, A; Lindgren, F
Hearing thresholds were determined in 83 'pop' musicians with an average age of 26 years, average exposure time of 9 years and average weekly exposure time of 18 hours. The following factors had a statistically significant influence (p 95) on hearing: ageing, brief exposure per session, long exposure time in years (2 kHz), participation in military service (250 Hz), listening to pop music with head phones (2 kHz). PMID:929089
Full Text Available Introduction: The aim of this study was to evaluate the efficacy of combined intratympanic and systemic steroid therapy compared with systemic steroid therapy alone in idiopathic sudden sensorineural hearing loss (ISSNHL patients with poor prognostic factors. Materials and Methods: Seventy-seven patients with sudden sensorineural hearing loss (SSNHL who had at least one poor prognostic factor (age greater than 40 years, hearing loss more than 70 db, or greater than a 2-week delay between the onset of hearing loss and initiation of therapy were included in this study. Patients were randomized to the intervention group (combined intratympanic and systemic steroid therapy or the control group (systemic steroid therapy alone. All patients received oral treatment with systemic prednisolone (1 mg/kg/day for 10 days, acyclovir (2 g/day for 10 days, divided into four doses, triamterene H (daily, and omeprazole (daily, during steroid treatment, and were advised to follow a low salt diet. The intervention group also received intratympanic dexamethasone injections (0.4 ml of 4 mg/ml dexamethasone two times a week for two consecutive weeks (four injections in total. A significant hearing improvement was defined as at least a 15-db decrease in pure tone average (PTA. Results: Among all participants, 44 patients (57.14% showed significant improvement in hearing evaluation. More patients showed hearing improvement in the intervention group than in the control group (27 patients (75% versus 17 patients (41.4%, respectively; P = 0.001. Conclusion: The combination of intratympanic dexamethasone and systemic prednisolone is more effective than systemic prednisolone alone in the treatment of poor-prognosis SSNHL.
Sensory neural hearing loss (SNHL) was evaluated in the patients who were treated with concurrent chemoradiation therapy for nasopharyngeal carcinoma. Ten from 48 ears showed persistent SNHL. Radiotherapy techniques, radiation dose to inner ear and post-treatment otitis media were significant predicting factors for SNHL
Nasir, H M; Rampal, K G
Sensorineural hearing loss is a common and important source of disability among the workers and often caused by occupational noise exposure. Aims of the study were to determine the prevalence and contributing factors of hearing loss among airport workers. A cross-sectional study was carried out at an airport in Malaysia. This study used stratified sampling method that involved 358 workers who were working in 3 different units between November 2008 and March 2009. Data for this study were collected by using questionnaires eliciting sociodemographic, occupational exposure history (previous and present), life-style including smoking habits and health-related data. Otoscopic and pure-tone audiometric tests were conducted for hearing assessment. Noise exposure status was categorize by using a noise logging dosimeter to obtain 8-hour Time-Weighted Average (TWA). Data was analyzed by using SPSS version 12.0.1 and EpiInfo 6.04. The prevalence of hearing loss was 33.5%. Age >40 years old (aOR 4.3, 95%CI 2.2-8.3) is the main risk factors for hearing loss followed by duration of noise exposure >5 years (aOR 2.5, 95%CI 1.4-4.7), smoking (aOR 2.1, 95%CI 1.2-3.4), duration of service >5 years (aOR 2.1, 95%CI 1.1-3.9), exposure to explosion (aOR 6.1, 95%CI 1.3-29.8), exposure to vibration (aOR 2.2, 95%CI 1.1-4.3) and working in engineering unit (aOR 5.9, 95%CI 1.1-30.9). The prevalence rate ratio of hearing loss for nonsmokers aged 40 years old and younger, smokers aged 40 years old and younger, non-smokers older than 40 years old and smokers older than 40 years old was 1.0, 1.7, 2.8 and 4.6 respectively. This result contributes towards better understanding of risk factors for hearing loss, which is relatively common among Malaysian workers. PMID:22582554
Leibold, Lori J.; Hillock-Dunn, Andrea; Duncan, Nicole; Roush, Patricia A.; Buss, Emily
This study compared spondee identification performance in presence of speech-shaped noise or two competing talkers across children with hearing loss and age-matched children with normal hearing. The results showed a greater masking effect for children with hearing loss compared to children with normal hearing for both masker conditions. However, the magnitude of this group difference was significantly larger for the two-talker compared to the speech-shaped noise masker. These results support the hypothesis that hearing loss influences children’s perceptual processing abilities. PMID:23492919
Full Text Available The paper is based on a study conducted in three different industries on 84.4 on their employees to determine the effect of over all noise intensity, length of employment and rest periods among them. It was found that the mentioned factors have direct effect on the induced hearing loss among the exposed workers. High noise level and long period of employment adversely affect the hearing ability while the breaks taken during daily working hours have prevented the expected defect.
Lund, Emily; Werfel, Krystal L.; Schuele, C. Melanie
This pilot study compared the phonological awareness skills and vocabulary performance of English monolingual and Spanish-English bilingual children with and without hearing loss. Preschool children with varying degrees of hearing loss (n = 18) and preschool children without hearing loss (n = 19) completed measures of phonological awareness and…
Naeem, Z; Newton, V
The study was designed to assess whether Asian children were at an increased risk of having sensorineural hearing loss. All the Asian children aged between 5 and 16 years were identified from class lists to form the study group, and an equal number of non-Asian children, controlling for age and sex, were randomly selected from the Child Health records to form the control group. With parent's consent, a four frequency (1, 2, 4 and 8 kHz) pure tone screening test was carried out on the children in both groups. There was a second screen for the failures and a diagnostic assessment for those failing again. Prevalence rate was calculated for two categories of hearing impairment (mild-to-profound and moderate-to-profound) and for the better and worse ear, resulting in four prevalence estimates for each group. The absolute prevalence rates for the Asian children were all consistently higher (ranging from 5.09 to 9.61 per 1000) than the non-Asian children (ranging from 1.4 to 3.51 per 1000) and the relative risk measure showed the Asian group to be 2.42-3.61 times at greater risk of having a hearing loss. The results of this study were compared with other studies and inconsistencies were discussed with reference to methodological differences and deficiencies. It was concluded that Asian children were at an increased risk of sensorineural hearing loss. PMID:8922698
Brandt, CT; Caye-Thomsen, P
Hearing loss is a well-known sequelae from meningitis, affecting up to 25% of survivors. However, the principal components of the infectious and inflammatory reaction responsible for the sensorineural hearing loss remain to be identified. The present study aimed to investigate the impact of an augmented neutrophil response on the development of hearing loss and cochlear damage in a model of experimental pneumococcal meningitis in rats. Hearing loss and cochlear damage were assessed by distortion product oto-acoustic emissions (DPOAE), auditory brainstem response (ABR) and histopathology in rats treated with ceftriaxone 28 h after infection. Rats were treated with Granulocyte Colony Stimulating Factor (G-CSF) initiated prior to infection, 28 h after infection or with ceftriaxone only. Rats were followed for 7 days, and assessment of hearing was performed before infection and 24 h and day 8 after infection. Pretreatment with G-CSF increased hearing loss 24 h after infection and on day 8 compared to untreated rats (Mann-Whitney, P = 0.012 and P = 0.013 respectively). The increased sensorineural hearing loss at day 8 was associated with significantly decreased spiral ganglion cell counts (P = 0.0006), increased damage to the organ of Corti (P = 0.007), increased areas of inflammatory infiltrates (P = 0.02) and increased white blood cell (WBC) counts in cerebrospinal fluid on day 8 after infection (P = 0.0084). Initiation of G-CSF 28 h after infection did not significantly affect hearing loss or cochlear pathology compared to controls. In conclusion, the inflammatory host reaction contributes significantly to the development of hearing loss in experimental meningitis.
Manchaiah, Vinaya; Danermark, Berth; Ahmadi, Tayebeh; Tomé, David; Zhao, Fei; Li, Qiang; Krishna, Rajalakshmi; Germundsson, Per
Background Hearing loss is one of the most common chronic conditions in older adults. In audiology literature, several studies have examined the attitudes and behavior of people with hearing loss; however, not much is known about the manner in which society in general views and perceives hearing loss. This exploratory study was aimed at understanding the social representation of hearing loss (among the general public) in the countries of India, Iran, Portugal, and the UK. We also compared these social representations. Materials and methods The study involved a cross-sectional design, and participants were recruited using the snowball sampling method. A total of 404 people from four countries participated in the study. Data were collected using a free-association task where participants were asked to produce up to five words or phrases that came to mind while thinking about hearing loss. In addition, they were also asked to indicate if each word they presented had positive, neutral, or negative associations in their view. Data were analyzed using various qualitative and quantitative methods. Results The most frequently occurring categories were: assessment and management; causes of hearing loss; communication difficulties; disability; hearing ability or disability; hearing instruments; negative mental state; the attitudes of others; and sound and acoustics of the environment. Some categories were reported with similar frequency in most countries (eg, causes of hearing loss, communication difficulties, and negative mental state), whereas others differed among countries. Participants in India reported significantly more positive and fewer negative associations when compared to participants from Iran, Portugal, and the UK. However, there was no statistical difference among neutral responses reported among these countries. Also, more differences were noted among these countries than similarities. Conclusion These findings provide useful insights into the public perception of hearing loss that may prove useful in public education and counseling. PMID:26604726
Reiss, Lina A J; Stark, Gemaine; Nguyen-Huynh, Anh T; Spear, Kayce A; Zhang, Hongzheng; Tanaka, Chiemi; Li, Hongzhe
Hybrid or electro-acoustic stimulation (EAS) cochlear implants (CIs) are designed to provide high-frequency electric hearing together with residual low-frequency acoustic hearing. However, 30-50% of EAS CI recipients lose residual hearing after implantation. The objective of this study was to determine the mechanisms of EAS-induced hearing loss in an animal model with high-frequency hearing loss. Guinea pigs were exposed to 24 h of noise (12-24 kHz at 116 dB) to induce a high-frequency hearing loss. After recovery, two groups of animals were implanted (n = 6 per group), with one group receiving chronic acoustic and electric stimulation for 10 weeks, and the other group receiving no stimulation during this time frame. A third group (n = 6) was not implanted, but received chronic acoustic stimulation. Auditory brainstem responses were recorded biweekly to monitor changes in hearing. The organ of Corti was immunolabeled with phalloidin, anti-CtBP2, and anti-GluR2 to quantify hair cells, ribbons and post-synaptic receptors. The lateral wall was immunolabeled with phalloidin and lectin to quantify stria vascularis capillary diameters. Bimodal or trimodal diameter distributions were observed; the number and location of peaks were objectively determined using the Aikake Information Criterion and Expectation Maximization algorithm. Noise exposure led to immediate hearing loss at 16-32 kHz for all groups. Cochlear implantation led to additional hearing loss at 4-8 kHz; this hearing loss was negatively and positively correlated with minimum and maximum peaks of the bimodal or trimodal distributions of stria vascularis capillary diameters, respectively. After chronic stimulation, no significant group changes in thresholds were seen; however, elevated thresholds at 1 kHz in implanted, stimulated animals were significantly correlated with decreased presynaptic ribbon and postsynaptic receptor counts. Inner and outer hair cell counts did not differ between groups and were not correlated with threshold shifts at any frequency. As in the previous study in a normal-hearing model, stria vascularis capillary changes were associated with immediate hearing loss after implantation, while little to no hair cell loss was observed even in cochlear regions with threshold shifts as large as 40-50 dB. These findings again support a role of lateral wall blood flow changes, rather than hair cell loss, in hearing loss after surgical trauma, and implicate the endocochlear potential as a factor in implantation-induced hearing loss. Further, the analysis of the hair cell ribbons and post-synaptic receptors suggest that delayed hearing loss may be linked to synapse or peripheral nerve loss due to stimulation excitotoxicity or inflammation. Further research is needed to separate these potential mechanisms of delayed hearing loss. PMID:26087114
Park, Min-Joon; Yoon, Sung-Won; Kim, Kang-Hyeon; Kim, Young-Jin
A speech discrimination test is a test using a list of 25 phonetically balanced monosyllables. It is often overlooked but significant enough for pure tone audiometry. Many physicians have performed pure tone audiometry but without a speech discrimination test. A 73-year-old woman visited our clinic complaining of sudden bilateral hearing loss. Pure tone audiometry showed only bilateral high frequency loss. However, speech discrimination had decreased markedly. We decided to follow-up after 1 ...
Full Text Available Context: The importance of brainstem auditory evoked potential monitoring in reducing hearing loss during microvascular decompression for trigeminal neuralgia is now accepted. However the extent of the changes in the pattern of these potentials and the safe limits to which these changes are relevant in reducing postoperative hearing loss have not been established. Aims: The aim of this study is to quantify these changes and relate these to the postoperative hearing loss. Settings and Design: This study was done at the Walton Centre for neurology and neurosurgery, Liverpool, United Kingdom. The study was designed to give a measure of the change in the wave pattern following microvascular decompression and relate it to postoperative hearing loss. Materials and Methods: Seventy-five patients undergoing microvascular decompression for trigeminal neuralgia had preoperative and postoperative hearing assessments and intraoperative brainstem auditory evoked potential monitoring. Statistical Analysis Used: Chi-square tests. Results: It was found that the wave V latency was increased by more than 0.9ms in nine patients, eight of whom suffered significant postoperative hearing loss as demonstrated by audiometry. It was also seen that progressive decrease in amplitude of wave V showed progressive hearing loss with 25% loss when amplitude fell by 50 and 100% loss when wave V was lost completely. However most of the patients did not have a clinically manifest hearing loss. Conclusions: A per-operative increase in the latency of wave V greater than 0.9 ms and a fall of amplitude of wave V of more than 50% indicates a risk to hearing.
Keating, Peter; King, Andrew J
Under normal hearing conditions, comparisons of the sounds reaching each ear are critical for accurate sound localization. Asymmetric hearing loss should therefore degrade spatial hearing and has become an important experimental tool for probing the plasticity of the auditory system, both during development and adulthood. In clinical populations, hearing loss affecting one ear more than the other is commonly associated with otitis media with effusion, a disorder experienced by approximately 80% of children before the age of two. Asymmetric hearing may also arise in other clinical situations, such as after unilateral cochlear implantation. Here, we consider the role played by spatial cue integration in sound localization under normal acoustical conditions. We then review evidence for adaptive changes in spatial hearing following a developmental hearing loss in one ear, and show that adaptation may be achieved either by learning a new relationship between the altered cues and directions in space or by changing the way different cues are integrated in the brain. We next consider developmental plasticity as a source of vulnerability, describing maladaptive effects of asymmetric hearing loss that persist even when normal hearing is provided. We also examine the extent to which the consequences of asymmetric hearing loss depend upon its timing and duration. Although much of the experimental literature has focused on the effects of a stable unilateral hearing loss, some of the most common hearing impairments experienced by children tend to fluctuate over time. We therefore propose that there is a need to bridge this gap by investigating the effects of recurring hearing loss during development, and outline recent steps in this direction. We conclude by arguing that this work points toward a more nuanced view of developmental plasticity, in which plasticity may be selectively expressed in response to specific sensory contexts, and consider the clinical implications of this. PMID:24409125
Andrew J King
Full Text Available Under normal hearing conditions, comparisons of the sounds reaching each ear are critical for accurate sound localization. Asymmetric hearing loss should therefore degrade spatial hearing and has become an important experimental tool for probing the plasticity of the auditory system, both during development and adulthood. In clinical populations, hearing loss affecting one ear more than the other is commonly associated with otitis media with effusion, a disorder experienced by approximately 80% of children before the age of two. Asymmetric hearing may also arise in other clinical situations, such as after unilateral cochlear implantation. Here, we consider the role played by spatial cue integration in sound localization under normal acoustical conditions. We then review evidence for adaptive changes in spatial hearing following a developmental hearing loss in one ear, and argue that adaptation may be achieved either by learning a new relationship between the altered cues and directions in space or by changing the way different cues are integrated in the brain. We next consider developmental plasticity as a source of vulnerability, describing maladaptive effects of asymmetric hearing loss that persist even when normal hearing is provided. We also examine the extent to which the consequences of asymmetric hearing loss depend upon its timing and duration. Although much of the experimental literature has focused on the effects of a stable unilateral hearing loss, some of the most common hearing impairments experienced by children tend to fluctuate over time. We therefore argue that there is a need to bridge this gap by investigating the effects of recurring hearing loss during development, and outline recent steps in this direction. We conclude by arguing that this work points toward a more nuanced view of developmental plasticity, in which plasticity may be selectively expressed in response to specific sensory contexts, and consider the clinical implications of this.
Finneran, James J.; Carder, Donald A.; Dear, Randall; Belting, Traci; McBain, Jim; Dalton, Les; Ridgway, Sam H.
A behavioral response paradigm was used to measure pure-tone hearing sensitivities in two belugas (Delphinapterus leucas). Tests were conducted over a 20-month period at the Point Defiance Zoo and Aquarium, in Tacoma, WA. Subjects were two males, aged 8-10 and 9-11 during the course of the study. Subjects were born in an oceanarium and had been housed together for all of their lives. Hearing thresholds were measured using a modified up/down staircase procedure and acoustic response paradigm where subjects were trained to produce audible responses to test tones and to remain quiet otherwise. Test frequencies ranged from approximately 2 to 130 kHz. Best sensitivities ranged from approximately 40 to 50 dB re 1 ?Pa at 50-80 kHz and 30-35 kHz for the two subjects. Although both subjects possessed traditional ``U-shaped'' mammalian audiograms, one subject exhibited significant high-frequency hearing loss above 37 kHz compared to previously published data for belugas. Hearing loss in this subject was estimated to approach 90 dB for frequencies above 50 kHz. Similar ages, ancestry, and environmental conditions between subjects, but a history of ototoxic drug administration in only one subject, suggest that the observed hearing loss was a result of the aminoglycoside antibiotic amikacin. .
Cinamon, Rachel Gali; Most, Tova; Michael, Rinat
This study examined the effect of hearing status on role salience and anticipated work-family relations among 101 unmarried young adults aged 20-33 years: 35 with hearing loss (19 hard of hearing and 16 deaf) and 66 hearing. Participants completed the Life Role Salience scale, anticipated conflictual relations scale, anticipated facilitory…
S, Peer; J J, Fagan.
Full Text Available BACKGROUND: Developing countries have the world's highest prevalence of hearing loss, and hearing screening programmes are scarce. Mobile devices such as smartphones have potential for audiometric testing.OBJECTIVES: To evaluate the uHear app using an Apple iPhone as a possible hearing screening too [...] l in the developing world, and to determine accuracy of certain hearing thresholds that could prove useful in early detection of hearing loss for high-risk populations in resource-poor communities.METHODS: This was a quasi-experimental study design. Participants recruited from the Otolaryngology Clinic, Groote Schuur Hospital, Cape Town, South Africa, completed a uHear test in three settings - waiting room (WR), quiet room (QR) and soundproof room (SR). Thresholds were compared with formal audiograms.RESULTS: Twenty-five patients were tested (50 ears). The uHear test detected moderate or worse hearing loss (pure-tone average (PTA) >40 dB) accurately with a sensitivity of 100% in all three environments. Specificity was 88% (SR), 73% (QR) and 68% (WR). It was highly accurate in detecting high-frequency hearing loss (2 000, 4 000, 6 000 Hz) in the QR and SR with 'good' and 'very good' kappa values, showing statistical significance (p40 dB). It is highly sensitive for detecting threshold changes at high frequencies, making it reasonably well suited to detect presbycusis and ototoxic hearing loss from HIV, tuberculosis therapy and chemotherapy. Portability and ease of use make it appropriate to use in developing world communities that lack screening programmes.
Thai-Van, Hung; Micheyl, Christophe; Norena, Arnaud; Collet, Lionel
Earlier data in the literature have shown local improvements in frequency discrimination performance near the cut-off frequency of steeply sloping, high-frequency hearing loss in subjects with cochlear damage. The general objective of the present study was to characterize further the relationships between this effect and various audiometric variables: namely, the slope, extent and shape of the hearing loss. In particular, we were interested in determining whether the effect was present in subjects with more moderately sloping hearing loss and/or other patterns of loss. Frequency difference limens (DLFs) were measured in 20 subjects (eight female, 12 male, median age 55.5 years) with high-frequency hearing loss. At least 12 frequencies were tested at intervals of 1/8 octave over a range of 1.5 octaves around the cut-off frequency for hearing loss (Fc). The Fc corresponded to the audiogram edge frequency and was defined as the highest test frequency, at the beginning of the slope, with a hearing threshold of no more than 5 dB HL above that of the best hearing frequency. The level of the test tones was randomized over a range of 6 dB around a nominal level, following an equal-loudness contour curve measured at 1/2-octave intervals. Results showed that DLFs were significantly smaller in a frequency band 1/4 octave wide centred on Fc than in the other bands. Furthermore, the average DLF measured in this band proved to be negatively correlated with the slope of hearing loss. No such significant relationship was found with the other audiometric indices considered, namely, the extent and maximum amount of hearing loss and the log-transformed cut-off frequency. The 20 subjects were divided into three groups according to the slope of their hearing loss relative to Fc (steep, >25 dB/1/2 octave; medium, between 12 and 25 dB/1/2 octave; and shallow, octave). A local improvement in DLF around Fc was observed in the steep- and medium-slope groups and was confirmed statistically in the steep-slope group. Similar measurements in subjects with low-frequency or notched hearing loss allowed us to establish the presence of similar local improvements in DLFs around audiogram edges. These results, which suggest the slope of the hearing loss to be the most important factor for the occurrence of local DLF improvements, are consistent with both an interpretation in terms of peripheral mechanisms and one in terms of central mechanisms, i.e. injury-induced neural reorganization. PMID:11872610
Brown, Kerry K.; Viana, Lucas M.; Helwig, Cecilia C.; Artunduaga, Maria A.; Quintanilla-Dieck, Lourdes; Jarrin, Patricia; Osorno, Gabriel; McDonough, Barbara; DePalma, Steven R.; Eavey, Roland D.; Seidman, Jonathan G.; Seidman, Christine E.
Microtia is a rare, congenital malformation of the external ear that in some cases has a genetic etiology. We ascertained a three-generation family with bilateral microtia and hearing loss segregating as an autosomal dominant trait. Exome sequencing of affected family members detected only seven shared, rare, heterozygous, nonsynonymous variants, including one protein truncating variant, a HOXA2 nonsense change (c.703C>T, p.Q235*). The HOXA2 variant was segregated with microtia and hearing loss in the family and was not seen in 6,500 individuals sequenced by the NHLBI Exome Sequencing Project or in 218 control individuals sequenced in this study. HOXA2 has been shown to be critical for outer and middle ear development through mouse models and has previously been associated with autosomal recessive bilateral microtia. Our data extend these conclusions and define HOXA2 haploinsufficiency as the first genetic cause for autosomal-dominant nonsyndromic microtia. PMID:23775976
Schmithorst, Vincent J; Holland, Scott K.; Ret, Jennifer; Duggins, Angie; Arjmand, Ellis; Greinwald, John
Previous studies have shown evidence of cortical reorganization following unilateral sensorineural hearing loss (USNHL). In addition, subjects with right USNHL have shown greater deficits in academic and language performance compared to subjects with left USNHL. A preliminary functional MRI investigation was performed on a small cohort of subjects, 4 with left USNHL and 4 with right USNHL, using the paradigm of listening to random tones. While the subjects with left USNHL displayed greater ac...
Fechter, Laurence D.; Gearhart, Caroline; Shirwany, Najeeb A
Acrylonitrile, one of the 50 most commonly produced industrial chemicals, has recently been identified as a promoter of noise-induced hearing loss (NIHL). This agent has the potential to produce oxidative stress through multiple pathways. We hypothesize that acrylonitrile potentiates NIHL as a consequence of oxidative stress. The objectives of this study were to characterize acrylonitrile exposure conditions that promote permanent NIHL in rats and determine the ability of this nitrile to prod...
A retrospective study was done to ascertain the risks of cochlear damage from radiotherapy of the nasopharynx. Audiometric evaluation, pre- and post-radiotherapy, revealed that 7 out of 13 patients had sustained sensori-neural deafness. Contrary to what is generally believed of the resistance of the cochlea to radiotherapeutic damage, eventual loss of hearing can occasionally be expected in patients undergoing radiation therapy for head and neck tumors
Hildebrand, Michael S; Newton, Stephen S; Gubbels, Samuel P; Sheffield, Abraham M; Kochhar, Amit; de Silva, Michelle G; Dahl, Hans-Henrik M; Rose, Scott D; Behlke, Mark A; Smith, Richard J H
Development of effective therapeutics for hearing loss has proven to be a slow and difficult process, evidenced by the lack of restorative medicines and technologies currently available to the otolaryngologist. In large part this is attributable to the limited regenerative potential in cochlear cells and the secondary degeneration of the cochlear architecture that commonly follows sensorineural hearing impairment. Therapeutic advances have been made using animal models, particularly in regeneration and remodeling of spiral ganglion neurons, which retract and die following hair cell loss. Natural regeneration in avian and reptilian systems provides hope that replacement of hair cells is achievable in humans. The most exciting recent advancements in this field have been made in the relatively new areas of cellular replacement and gene therapy. In this review we discuss recent developments in gene- and cell-based therapy for hearing loss, including detailed analysis of therapeutic mechanisms such as RNA interference and stem cell transplantation, as well as in utero delivery to the mammalian inner ear. We explore the advantages and limitations associated with the use of these strategies for inner ear restoration. PMID:18223547
Stevenson, Jim; McCann, Donna; Watkin, Peter; Worsfold, Sarah; Kennedy, Colin
Background: There are well-replicated findings that link poor development on a range of communication skills with increased behavioural problems. This paper examines this relationship in children with hearing loss. Method: One hundred and twenty children with hearing loss (67 boys, 53 girls) and 63 hearing children (37 boys, 26 girls) with a mean…
Full Text Available The paper takes 230 Tibetan hearing loss children sample to research on relationship model of social adaptation, social support and life satisfaction of Tibetan hearing loss children by hearing disabled children’s social adaptive behavior, social support assessment scale and life satisfaction rating scale. Results present that there be significant positive relationship between social support and social adaptation, between social adaptation and life satisfaction. Further more, the social support doesn’t affect on life satisfaction rating, but through the social adaptation as intermediary affect on life satisfaction.
Mizutari, Kunio; Michikawa, Takehiro; Saito, Hideyuki; Okamoto , Yasuhide; Enomoto, Chieko; Takebayashi, Toru; Ogawa, Kaoru; Nishiwaki, Yuji
While hearing aids are recommended for people with age-related hearing loss, many with impaired hearing do not use them. In this study, we investigated how many elderly people in the study area needed hearing aids, and the factors that determined continued wearing of the devices. The study area was Kurabuchi Town, Japan, where 1,437 residents (those aged 65 years or over) were eligible for participation in the study; 1,414 participated, of whom, 103 (7.3%) were already using hearing aids at t...
Ou, Henry C.; Santos, Felipe; Raible, David W.; Simon, Julian A.; Rubel, Edwin W
Several animal models have been used for the study of mechanosensory hair cells and hearing loss. Because of the difficulty of tissue acquisition and large animal size, these traditional models are impractical for high-throughput screening. The zebrafish has emerged as a powerful animal model for screening drugs that cause or prevent hair cell death. The unique characteristics of the zebrafish enable rapid in vivo imaging of hair cells and hair cell death. We have used this model to screen fo...
Full Text Available Noise-induced hearing loss, which is one of the 10 leading occupational diseases, is a debilitating and irreversible disease. During the recent 15-years period (1997-2012, several studies have investigated the association between noise, hearing damage and other side effects of noise in Iran. The aim of this study was to review systematically the relevant literature related to noise-induced hearing loss, lead to developing noise exposure limits. In this systematic review, two researchers independently extracted the data from 31 past studies that had considered noise-induced hearing loss (including hearing loss, temporary and permanent hearing threshold shift and auditory trauma. The data were then recorded in a modified form and Statistical analyses were performed using SPSS, version 16.0. In analyzed studies the weighted average equivalent sound pressure level [L Aeq ] was 90.29 dB(A and average hearing loss was 26.44 dB(A. The Highest degree of hearing loss in the right ear was associated at 4000 Hz, and the highest degree of hearing loss in the left ear was associated to 1000 and 4000 Hz. The majority of the reviewed studies have confirmed that exposure to a noise level above 85 dB (A can lead to an increased chance of hearing loss. Furthermore, the results of the present review indicated that as L Aeq increased up to 85 dB(A, so did the severity of the hearing loss.
Soltanzadeh, Ahmad; Ebrahimi, Hossein; Fallahi, Majid; Kamalinia, Mojtaba; Ghassemi, Shadi; Golmohammadi, Rostam
Noise-induced hearing loss, which is one of the 10 leading occupational diseases, is a debilitating and irreversible disease. During the recent 15-years period (1997-2012), several studies have investigated the association between noise, hearing damage and other side effects of noise in Iran. The aim of this study was to review systematically the relevant literature related to noise-induced hearing loss, lead to developing noise exposure limits. In this systematic review, two researchers independently extracted the data from 31 past studies that had considered noise-induced hearing loss (including hearing loss, temporary and permanent hearing threshold shift and auditory trauma). The data were then recorded in a modified form and Statistical analyses were performed using SPSS, version 16.0. In analyzed studies the weighted average equivalent sound pressure level [L Aeq ] was 90.29 dB(A) and average hearing loss was 26.44 dB(A). The Highest degree of hearing loss in the right ear was associated at 4000 Hz, and the highest degree of hearing loss in the left ear was associated to 1000 and 4000 Hz. The majority of the reviewed studies have confirmed that exposure to a noise level above 85 dB (A) can lead to an increased chance of hearing loss. Furthermore, the results of the present review indicated that as L Aeq increased up to 85 dB(A), so did the severity of the hearing loss. PMID:26171352
SOLTANZADEH, Ahmad; EBRAHIMI, Hossein; FALLAHI, Majid; KAMALINIA, Mojtaba; GHASSEMI, Shadi; GOLMOHAMMADI, Rostam
Noise-induced hearing loss, which is one of the 10 leading occupational diseases, is a debilitating and irreversible disease. During the recent 15-years period (1997–2012), several studies have investigated the association between noise, hearing damage and other side effects of noise in Iran. The aim of this study was to review systematically the relevant literature related to noise-induced hearing loss, lead to developing noise exposure limits. In this systematic review, two researchers independently extracted the data from 31 past studies that had considered noise-induced hearing loss (including hearing loss, temporary and permanent hearing threshold shift and auditory trauma). The data were then recorded in a modified form and Statistical analyses were performed using SPSS, version 16.0. In analyzed studies the weighted average equivalent sound pressure level [L Aeq ] was 90.29 dB(A) and average hearing loss was 26.44 dB(A). The Highest degree of hearing loss in the right ear was associated at 4000 Hz, and the highest degree of hearing loss in the left ear was associated to 1000 and 4000 Hz. The majority of the reviewed studies have confirmed that exposure to a noise level above 85 dB (A) can lead to an increased chance of hearing loss. Furthermore, the results of the present review indicated that as L Aeq increased up to 85 dB(A), so did the severity of the hearing loss. PMID:26171352
Kontorinis, Georgios; Nichani, Jaya; Freeman, Simon R; Rutherford, Scott A; Mills, Samantha; King, Andrew T; Mawman, Deborah; Huson, Sue; O'Driscoll, Martin; Gareth Evans, D; Lloyd, Simon K W
The objective of this study was to describe changes in hearing over time in patients with neurofibromatosis type 2 (NF2) treated conservatively. A retrospective case review was conducted in a tertiary referral centre. Pure tone audiometry, speech discrimination scores, serviceable hearing (American Academy of Otolaryngology class A or B) and measurement of vestibular schwannoma (VS) size on magnetic resonance imaging were evaluated in 56 patients (89 ears) with NF2 with at least one conservatively managed VS. Over a mean follow-up period of 7 years (range 0.8-21 years) pure tone average thresholds increased gradually with a mean annual rate of 1.3 dB for the right ear (p = 0.0003) and 2 dB for the left ear (p = 0.0009). Speech discrimination scores dropped with an average annual rate of 1.3 and 0.34% in the right and left ear, respectively. Patients maintained serviceable hearing for an average of 7.6 years (range 2.7-19.3 years). The average annual VS growth was 0.4 mm without any correlation with hearing loss. There was a correlation between patients' age and pure tone threshold increase (p < 0.05 for both ears). In this selected population of patients with NF2, hearing threshold increases were very slow. In NF2 patients with indolently behaving tumours, serviceable hearing can be maintained for a significant length of time, making conservative management an attractive option. PMID:25294053
Mizoue, T.; Miyamoto, T.; Shimizu, T.
Background: Evidence has accumulated concerning the adverse effects of smoking on hearing acuity, but it is not clear whether smoking modifies the association between exposure to noise and hearing loss.
Lalaiants, M R; Markova, T G; Bakhshinian, V V; Bliznets, E A; Poliakov, A V; Tavartikiladze, G A
The objective of the present work was to study specific features of the audiological phenotype and the prevalence of GJB2-related sensorineural hearing loss (SNHL) in the infants suffering acoustic disturbances. The study included 264 children with bilateral non-syndromic sensorineural loss of hearing diagnosed during the first year of life by means of detailed audiological examination that included tympanometry, registration of short-latency auditory action potentials (SLAAP), delayed evoked otoacoustic emission (DEOAE), distortion product-frequency otoacoustic emission (DPFOAE), and auditory brain-stem response (ABR). In addition, stationary acoustically evoked responses (SAER) were recorded in 38 children presenting with hearing impairment associated with GJB2-related sensorineural loss of hearing. The follow-up dynamic study involved 113 children subjected to repeated audiological examination. The study revealed the genotype with pathological mutations in 182 (69.0%) children including 171 (64.8%) ones with biallelic mutations and 11 (4.2%) with a single mutation (heterozygous genotype). Eighty two (31.0%) children had genotype without mutations. A total of 21 different mutations and 30 different genotypes were identified. Analysis of the family histories of the children showed that neither the absence of relatives suffering from hearing impairment nor the presence of risk factors of acquired hearing impairment excludes the possibility of GJB2-related sensorineural loss of hearing in the infants. Otoacoustic emission fails to be registered in the majority of the children with the altered genotype (87%) during the stay in the maternity house. Mutations in the GJB2 gene are most frequently diagnosed in the patients with the moderate, moderately severe, and severe loss of hearing. At the same time, almost half of the infants presenting with the mild loss of hearing were found to exhibit changes in the GJB2 gene. The thresholds of registration of short-latency auditory action potentials remain stable in 90.0% of the children presenting with GJB2-related sensorineural loss of hearing which makes it possible to choose the strategy of their rehabilitative treatment (the use of hearing aids or cochlear implantation) during the very first months of life and predict the favourable outcome of cochlear implantation and hearing aid measures. The results of the present work illustrate the importance and practical significance of genetic studies (GJB2 gene tresting) of the infants suffering sensorineural loss of hearing and other acoustic disturbances for the elucidation of etiology of these conditions, prognosis of the disease, and the choice of the strategy for its treatment. PMID:24781170
H. Jeffrey Kim; Jared J. Thompkins; Wycherly, Benjamin J.
Objective. To review our experience with intratympanic steroids (ITSs) for the treatment of idiopathic sudden sensorineural hearing loss (ISSNHL), emphasizing the ideal time to perform follow-up audiograms. Methods. Retrospective case review of patients diagnosed with ISSNHL treated with intratympanic methylprednisolone. Injections were repeated weekly with a total of 3 injections. Improvement was defined as an improved pure-tone average ?20?dB or speech-discrimination score ?20%. Results. Fo...
Pinto, Beatriz M.; Carvalho, Antonio P. O.; Gallagher, Sergio
This paper presents an overview of gymnasiums' acoustic problems when used for aerobics exercises classes (and similar) with loud noise levels of amplified music. This type of gymnasium is usually a highly reverberant space, which is a consequence of a large volume surrounded by hard surfaces. A sample of five schools in Portugal was chosen for this survey. Noise levels in each room were measured using a precision sound level meter, and analyzed to calculate the standardized daily personal noise exposure levels (LEP,d). LEP,d values from 79 to 91 dB(A) were found to be typical values in this type of room, inducing a health risk for its occupants. The reverberation time (RT) values were also measured and compared with some European legal requirements (Portugal, France, and Belgium) for nearly similar situations. RT values (1 kHz) from 0.9 s to 2.8 s were found. These reverberation time values clearly differentiate between good and acoustically inadequate rooms. Some noise level and RT limits for this type of environment are given and suggestions for the improvement of the acoustical environment are shown. Significant reductions in reverberation time values and noise levels can be obtained by simple measures.
In industry increased mechanisation results in increased noise levels. Operation of textile machines carries a high risk of hearing loss. In this study the evaluation of textile worker's noise induced hearing loss was reviewed cross sectionally. The hearing of 260 textile workers exposed to noise levels between 85-95 dB(A) in carpet and cotton textile factories was assessed by means of air and bone conductance audiograms obtained. The subjects were grouped into five hearing c...
Manchaiah, Vinaya K. C.; Zhao, Fei
Hearing impairment is known to be one of the most frequent sensory impairments. This condition is known to be a hidden disorder which is under recognised and under treated all around the world. The World Health Organisation (WHO) estimates suggest that there are over 275 million people with hearing impairment and 80% of them living in low and middle income countries. Moreover, the estimates suggest that incidence and prevalence of hearing loss and also the number of people with hearing loss a...
Ching-Chung Tsai; Chung-Bin Huang; Jiunn-Ming Sheen; Hsiu-Hui Wei; Chih-Cheng Hsiao
Hearing loss and blindness rarely occur in patients with chronic myeloid leukemia(CML). In this article, we present a 12-year-old girl who had right-side hearing loss as theinitial manifestation of CML, followed by left-side hearing loss and blindness of the left eyeseveral days after initiating treatment. The initial white cell count was 181,700/mm3.Audiometry showed severe sensorineural hearing loss of her right ear and moderate mixedhearing loss of the left ear. An ophthalmic examination s...
Ginzel, A; Brahe Pedersen, C; Spliid, P E; Andersen, E
A series of speech identification tests using 15 synthetic consonant-vowel syllables with variations in second and third formant transitions were conducted in different age groups with normal hearing and a group of older subjects with a sensorineural hearing loss. Varying degree of categorical perception of three distinct phoneme categories /b, d, g/ was observed in all groups. Responses were depending on start frequency and gliding direction of second and third formant transitions. In the group of 60-80-year-old persons with a hearing loss response percentages were significantly lower and error frequency high. Furthermore, category shift boundaries changed as compared with the group of 20-40 years old. Results in a group of children age 8-15 years, were rather similar to those in the 20-40-year-old group. Both age and age-induced sensorineural hearing loss seemed to influence elderly people's ability to identity the synthetic speech stimuli. PMID:7178806
Brennan, Marc A; McCreery, Ryan W; Jesteadt, Walt
This paper describes forward-masked thresholds for adults with hearing loss. Previous research has demonstrated that the loss of cochlear compression contributes to deficits in this measure of temporal resolution. Cochlear compression can be mimicked with fast-acting compression where the normal dynamic range is mapped to the impaired dynamic range. To test the hypothesis that fast-acting compression will most-closely approximate the normal ability to perceive forward-masked pure-tones, forward-masked thresholds were measured for two groups of adults (normal hearing, hearing loss). Adults with normal hearing were tested without amplification. Adults with hearing loss were tested with three different compression speeds and two different prescriptive procedures using a hearing-aid simulator. The two prescriptive procedures differed in the extent to which the normal dynamic range was mapped onto the impaired dynamic range. When using a faster compression speed with the prescriptive procedure that best restored the lost dynamic range, forward-masked thresholds for the listeners with hearing loss approximated those observed for the listeners with normal hearing. PMID:26520341
Full Text Available Introduction: Hearing loss is often thought of as a natural phenomenon of the aging process. However, studies are beginning to show that hearing loss is becoming increasingly more common amongst younger people. Approximately, 20-30 million people between the ages of 20 and 69 years have high frequency hearing loss due to chronic exposure to loud noise above 90 decibels (dB thanks to the advent of MP3 players and cellphones, according to the National Institute of Deafness.  If you are one of the millions who enjoys listening to a MP3 player or cellphone music to allay boredom or to pass time, then you might be at risk for hearing loss from headphones or earphones. Studies have shown that most MP3 players today can produce sounds up to 120 dB and that long-term cell phone use to hear music may cause damage in the inner ear. In today?s society, these devices are indispensible and are part of day-to-day life. Hence, this study was conducted to create awareness regarding prolonged exposure to loud noise either through an MP3 player or cell phone music. Materials and Methods: A total of 1,000 students from Shri Adichunchanagiri Institute of Medical Sciences and Adichunchanagiri Institute of Technology and Adichunchanagiri Pre-university College were chosen as part of the study. They were divided into four groups, Group A comprising 250 students who had a habit of listening to music through ear phones at least 2 h a day, Group B comprising 250 students who are used to earphone music less than 1 h per day and Group C comprising of 250 students who very occasionally use ear phones, but hear music mostly through speakers and Group D comprising of 250 students who are usually unaware of ear phone music and are not used to it. All the groups were subjected to pure tone audiometry and the audiogram obtained. Results and Observations: The study revealed high frequency hearing loss in 8% of Group A and 2% in Group B; whereas, in there were no hearing impairment in Groups C and D indicating a significant role of prolonged ear phone music as a cause of high frequency hearing loss in students. The thin percentage and absence of hearing loss in Groups B, C, and D suggests the impact of the duration of exposure also has a role in the pathology. Conclusion: This study proves beyond doubt that the prolonged usage of loud ear phone music is harmful to the ears and a simple way of pass time by hearing to ear phone music might cause hearing loss.
Full Text Available Objective:Mumps infection is endemic in Iran and mumps parotiditis is acommon disease in Iranian children. There has been a dramaticdecrease in the worldwide incidence of mumps since the introductionand use in 1968 of the very effective and inexpensive mumps vaccine.In Iran probably due to a higher percentage of unvaccinated youngpersons <15yr, the incidence rate of mumps infection and its sequelaare higher in comparison to corresponding data from developedcountries prior to comprehensive vaccination programs. The aim ofthe study was to investigate the effects of the mumps virus on cochlearfunction and to determine the frequency of related Sensory NeuralHearing Loss (SNHL in children.Material& Methods:This descriptive case-series study was conducted in 94children, agedless than 14 years, hospitalized between 1999 and 2001, in thepediatric ward of the Hazrat Rasool Hospital in Tehran. All patientswith documented mumps infection (specific mumps-IgM antibodywere evaluated twice for audiometeric function on the basis ofdiagnostic parameters for sensory neural hearing loss; the first evaluationwas done on admission and the second three weeks later. 54 patients(age range 1-14y, mean age 4.83±3.93, male: female ratio30:24were studied in two years.Results:The highest incidence of mumps was seen in winter (37% and spring(28% and the lowest in summer (13%. Specific IgM antibody formumps virus was detected in 74 children. Comprehensive audiologicevaluation was done in 54 patients at admission and again 3 weekslater. SNHL was detected in 7.2% of patients; the 4.4% incidence ofSNHL in this study was higher than in other studies in developedcountries prior to comprehensive vaccination programs.Conclusion:Implementation of comprehensive vaccination programs in youngIranians could dramatically reduce the burden and costs imposed bythe infection and its sequelae.Keywords: Mumps infection ;SNLH(sensorineural hearing loss;Mumpsvaccination
Harkins, Judith; Tucker, Paula
An Internet survey of individuals with hearing loss was conducted to determine their use of assistive listening devices for face-to-face conversation and, while part of an audience, their satisfaction with assistive listening devices, their interest in the concept of a universal assistive listening device receiver, and their interest in receiving audiologic information and services through the Internet. The 423 respondents who used assistive listening devices found them to be of significant b...
Kale, Sushrut; Heinz, Michael G.
The ability of auditory-nerve (AN) fibers to encode modulation frequencies, as characterized by temporal modulation transfer functions (TMTFs), generally shows a low-pass shape with a cut-off frequency that increases with fiber characteristic frequency (CF). Because AN-fiber bandwidth increases with CF, this result has been interpreted to suggest that peripheral filtering has a significant effect on limiting the encoding of higher modulation frequencies. Sensorineural hearing loss (SNHL), whi...
T G Sanchez; S C M Rocha; K A B Knobel; M A Kii; R M R Santos; Pereira, C. B.
In spite of the fact that musical hallucination have a significant impact on patients' lives, they have received very little attention of experts. Some researchers agree on a combination of peripheral and central dysfunctions as the mechanism that causes hallucination. The most accepted physiopathology of musical hallucination associated to hearing loss (caused by cochlear lesion, cochlear nerve lesion or by interruption of mesencephalon or pontine auditory information) is the disinhibition o...
STUDY OBJECTIVE--The aim was to carry out an economic evaluation of the programme implemented in one district health authority for the screening of infants for hearing loss. DESIGN--The approach taken was a cost-effectiveness analysis using the methodology of decision analysis to model the options appraised: (1) the conventional screening policy was for a health visitor and colleague to screen at 8-9 months, and at 10 months for each child to be seen again by a clinical medical officer for a ...
Lauris, José Roberto Pereira
Full Text Available Introduction: Studies on the occupational exposure show that noise has been reaching a large part of the working population around the world, and NIHL (noise-induced hearing loss is the second most frequent disease of the hearing system. Objective: To review the audiometry results of employees at the campus of the University of São Paulo, Bauru. Method: 40 audiometry results were analyzed between 2007 and 2008, whose ages comprised between 32 and 59 years, of both sexes and several professions: gardeners, maintenance technicians, drivers etc. The participants were divided into 2 groups: those with tonal thresholds within acceptable thresholds and those who presented auditory thresholds alterations, that is tonal thresholds below 25 dB (NA in any frequency (Administrative Rule no. 19 of the Ministry of Labor 1998. In addition to the Conventional Audiologic Evaluation (250Hz to 8.000Hz we also carried out High Frequencies Audiometry (9000Hz, 10000Hz, 11200Hz, 12500Hz, 14000Hz and 16000Hz. Results: According to the classification proposed by FIORINI (1994, 25.0% (N=10 they presented with NIHL suggestive audiometric configurations. The results of high frequencies Audiometry confirmed worse thresholds than those obtained in the conventional audiometry in the 2 groups evaluated. Conclusion: The use of high frequencies audiometry proved to be an important register as a hearing alteration early detection method.
Full Text Available Direction-specific interactions of sound waves with the head, torso and pinna provide unique spectral-shape cues that are used for the localization of sounds in the vertical plane, whereas horizontal sound localization is based primarily on the processing of binaural acoustic differences in arrival time (interaural time differences, or ITDs and sound level (interaural level differences, or ILDs. Because the binaural sound-localization cues are absent in listeners with total single-sided deafness (SSD, their ability to localize sound is heavily impaired. However, some studies have reported that SSD listeners are able, to some extent, to localize sound sources in azimuth, although the underlying mechanisms used for localization are unclear. To investigate whether SSD listeners rely on monaural pinna-induced spectral-shape cues of their hearing ear for directional hearing, we investigated localization performance for low-pass filtered (LP, 3 kHz and broadband (BB, 0.5 – 20 kHz noises in the two-dimensional frontal hemifield. We tested whether localization performance of SSD listeners further deteriorated when the pinna cavities of their hearing ear were filled with a mold that disrupted their spectral-shape cues. To remove the potential use of perceived sound level as an invalid azimuth cue, we randomly varied stimulus presentation levels over a broad range (45-65 dB SPL. Several listeners with SSD could localize HP and BB sound sources in the horizontal plane, but inter-subject variability was considerable. Localization performance of these listeners strongly reduced after diminishing of their spectral pinna-cues. We further show that inter-subject variability of SSD can be explained to a large extent by the severity of high-frequency hearing loss in their hearing ear.
Lee, Chi-Kyou; Lee, Jong Dae; Park, Moo Kyun; Lee, Byung Don
Background and Objectives Sudden sensorineural hearing loss (SSNHL) is commonly defined as a loss of at least 30 dB in three contiguous frequencies occurring within 3 days. Systemic steroid administration has become the most widely accepted treatment option for SSNHL. Since viral infection and vascular compromise are considered specific causes of SSNHL, antiviral agents, anticoagulants, and stellate ganglion block have been used for its treatment, although the evidence of their effectiveness is weak. The present study evaluated the hearing recovery rate in the combination therapy group (systemic steroids, antiviral agent, anticoagulants, and stellate ganglion block) in comparison with patients treated with systemic steroids alone. Subjects and Methods A total of 85 patients diagnosed with SSNHL were treated with combination therapy (group A, 46 patients) or systemic steroids only (group B, 39 patients). Hearing improvement was defined as a hearing gain of more than slight improvement using Siegel's criteria. All patients were treated with a 10-day course of systemic steroids (10-mg dexamethasone for 5 days, followed by tapering for 5 days). Acyclovir, heparin, and stellate ganglion block were included in the group A treatment regimen. Results The overall rate of hearing improvement was 60.9% (28/46 patients) in group A, which was significantly higher than that (38.5%, 15/39 patients) in group B. The distribution of prognostic factors was not significantly different between the two groups with the exception of the degree of initial hearing loss, which was more severe in group A. Upon analysis according to prognostic factors, group A showed a better hearing improvement recovery rate than group B in patients with hearing loss >70 dB, age >41 years, dizziness, and early treatment (<1 week). Conclusions Thus SSNHL patients treated with combination therapy have a higher likelihood of hearing improvement than those treated with systemic steroids alone. PMID:24653874
Purpose: Radiotherapy (RT) is a common treatment of head-and-neck carcinoma. The objective of this study was to perform a prospective multivariate assessment of the dose-effect relationship between intensity-modulated RT and hearing loss. Methods and Materials: Pure tone audiometry at 0.250-16 kHz was obtained before and after treatment in 101 patients (202 ears). All patients received full-course intensity-modulated RT (range, 56-70 Gy), with a median cochlear dose of 11.4 Gy (range, 0.2-69.7). Results: Audiometry was performed 1 week before and a median of 9 weeks (range, 1-112) after treatment. The mean hearing deterioration at pure tone average air-conduction 1-2-4 kHz was small (from 28.6 dB HL to 30.1 dB HL). However, individual patients showed clinically significant hearing loss, with 10-dB threshold shift incidences of 13% and 18% at pure tone averages air-conduction 1-2-4 kHz and 8-10-12.5 kHz, respectively. Post-treatment hearing capability was unfavorable in the case of greater inner ear radiation doses (p <0.0001), unfavorable baseline hearing capability (p <0.0001), green-eyed patients (p <0.0001), and older age (p <0.0001). Using multivariate analysis, a prediction of individual hearing capabiltity after treatment was made. Conclusion: RT-induced hearing loss in the mean population is modest. However, clinically significant hearing loss was observed in older patients with green eyes and unfavorable pretreatment hearing. In these patients, the intended radiation dose may be adjusted according to the proposed predictive model, aiming to decrease the risk of ototoxicity.
Most, Tova; Michaelis, Hilit
Purpose: This study aimed to investigate the effect of hearing loss (HL) on emotion-perception ability among young children with and without HL. Method: A total of 26 children 4.0-6.6 years of age with prelingual sensory-neural HL ranging from moderate to profound and 14 children with normal hearing (NH) participated. They were asked to identify…
Sun, Wei; Jun LIU; Zhang, Chao; Zhou, Na; Manohar, Senthilvelan; Winchester, Wendy; Miranda, Jason A.; Salvi, Richard J.
High dose sodium salicylate causes moderate, reversible hearing loss and tinnitus. Salicylate-induced hearing loss is believed to arise from a reduction in the electromotile response of outer hair cells (OHCs) and/or reduction of KCNQ4 potassium currents in OHCs, which decreases the driving force for the transduction current. Therefore, enhancing OHC potassium currents could potentially prevent salicylate-induced temporary hearing loss. In this study, we tested whether opening voltage-gated p...
Charizopoulou, Nikoletta; Lelli, Andrea; Schraders, Margit; Ray, Kausik; Hildebrand, Michael S.; Ramesh, Arabandi; Srisailapathy, C. R. Srikumari; Oostrik, Jaap; Admiraal, Ronald J. C.; Neely, Harold R.; Latoche, Joseph R.; Richard J. H. Smith; Northup, John K; Kremer, Hannie; Holt, Jeffrey R.
Sensorineural hearing loss affects the quality of life and communication of millions of people, but the underlying molecular mechanisms remain elusive. Here, we identify mutations in Gipc3 underlying progressive sensorineural hearing loss (age-related hearing loss 5, ahl5) and audiogenic seizures (juvenile audiogenic monogenic seizure 1, jams1) in mice and autosomal recessive deafness DFNB15 and DFNB95 in humans. Gipc3 localizes to inner ear sensory hair cells and spiral ganglion. A missense ...
Erika Celis-Aguilar; Luis Lassaletta; Miguel Torres-Martín; F. Yuri Rodrigues; Manuel Nistal; Castresana, Javier S.; Javier Gavilan; Rey, Juan A.
Hearing loss is the most common symptom in patients with vestibular schwannoma (VS). In the past, compressive mechanisms caused by the tumoral mass and its growth have been regarded as the most likely causes of the hearing loss associated with VS. Interestingly, new evidence proposes molecular mechanisms as an explanation for such hearing loss. Among the molecular mechanisms proposed are methylation of TP73, negative expression of cyclin D1, expression of B7-H1, increased expression of the pl...
Rubak, Tine; Thrysøe, Samuel Alberg; Koefoed-Nielsen, Birger; Bonde, Jens Peter; Kolstad, Henrik A
The causal association between occupational noise exposure and permanent hearing loss is well-documented and well-founded primary preventive approaches have been developed. However, documentation of the impact on the present prevalence of noise-induced hearing loss in the working population is limited. This study reports on the prevalence of noise-induced hearing loss in a population sample of 788 workers from 11 trades with expected high noise exposure levels and a reference group examined acco...
Santos, Renata Beatriz Fernandes; Marangoni, Andrea Tortosa; de Andrade, Adriana Neves; Prestes, Raquel; Gil, Daniela
OBJECTIVE: To determine the effects of a formal auditory training program on the behavioral, electrophysiological and subjective aspects of auditory function in individuals with bilateral high-frequency hearing loss. METHOD: A prospective study of seven individuals aged 46 to 57 years with symmetric, moderate high-frequency hearing loss ranging from 3 to 8 kHz was conducted. Evaluations of auditory processing (sound location, verbal and non-verbal sequential memory tests, the speech-in-noise test, the staggered spondaic word test, synthetic sentence identification with competitive ipsilateral and contralateral competitive messages, random gap detection and the standard duration test), auditory brainstem response and long-latency potentials and the administration of the Abbreviated Profile of Hearing Aid Benefit questionnaire were performed in a sound booth before and immediately after formal auditory training. RESULTS: All of the participants demonstrated abnormal pre-training long-latency characteristics (abnormal latency or absence of the P3 component) and these abnormal characteristics were maintained in six of the seven individuals at the post-training evaluation. No significant differences were found between ears in the quantitative analysis of auditory brainstem responses or long-latency potentials. However, the subjects demonstrated improvements on all behavioral tests. For the questionnaire, the difference on the background noise subscale achieved statistical significance. CONCLUSION: Auditory training in adults with high-frequency hearing loss led to improvements in figure-background hearing skills for verbal sounds, temporal ordination and resolution, and communication in noisy environments. Electrophysiological changes were also observed because, after the training, some long latency components that were absent pre-training were observed during the re-evaluation. PMID:25627996
Renata Beatriz Fernandes, Santos; Andrea Tortosa, Marangoni; Adriana Neves de, Andrade; Raquel, Prestes; Daniela, Gil.
Full Text Available OBJECTIVE: To determine the effects of a formal auditory training program on the behavioral, electrophysiological and subjective aspects of auditory function in individuals with bilateral high-frequency hearing [...] loss. METHOD: A prospective study of seven individuals aged 46 to 57 years with symmetric, moderate high-frequency hearing loss ranging from 3 to 8 kHz was conducted. Evaluations of auditory processing (sound location, verbal and non-verbal sequential memory tests, the speech-in-noise test, the staggered spondaic word test, synthetic sentence identification with competitive ipsilateral and contralateral competitive messages, random gap detection and the standard duration test), auditory brainstem response and long-latency potentials and the administration of the Abbreviated Profile of Hearing Aid Benefit questionnaire were performed in a sound booth before and immediately after formal auditory training. RESULTS: All of the participants demonstrated abnormal pre-training long-latency characteristics (abnormal latency or absence of the P3 component) and these abnormal characteristics were maintained in six of the seven individuals at the post-training evaluation. No significant differences were found between ears in the quantitative analysis of auditory brainstem responses or long-latency potentials. However, the subjects demonstrated improvements on all behavioral tests. For the questionnaire, the difference on the background noise subscale achieved statistical significance. CONCLUSION: Auditory training in adults with high-frequency hearing loss led to improvements in figure-background hearing skills for verbal sounds, temporal ordination and resolution, and communication in noisy environments. Electrophysiological changes were also observed because, after the training, some long latency components that were absent pre-training were observed during the re-evaluation.
The present investigation has been carried out to evaluate the sensitivity of the inner ear to irradiation. Cochlear function was tested in a cohort of 22 patients before and 7-84 months after receiving external irradiation for nasopharyngeal carcinoma. The pre-irradiation sensori-neural hearing threshold at 500, 1000, 2000, and 4000 Hz was used as a baseline for the individual patient, and the observed sensori-neural hearing loss (SNHL) was calculated as the difference between pre- and post-irradiation values. The pre-irradiation hearing level or patient age was not correlated with the actual SNHL. In contrast, there was a significant correlation between the total radiation dose to the inner ear and the observed hearing impairment. SNHL was most pronounced in the high frequencies, with values up to 35 dB (4000 Hz) and 25 dB (2000 Hz) in some patients. The latent period for the complication appeared to be 12 months or more. The deleterious effect of irradiation on the hearing should be kept in mind both in treatment planning and in the follow-up after radiotherapy
Ertmer, David J.
Background: Newborn hearing screening, early intervention programs, and advancements in cochlear implant and hearing aid technology have greatly increased opportunities for children with hearing loss to become intelligible talkers. Optimizing speech intelligibility requires that progress be monitored closely. Although direct assessment of…
Michael, Rinat; Cinamon, Rachel Gali; Most, Tova
The current study examined the contribution of hearing loss, social affiliation, and career self-efficacy to adolescents' future perceptions. Participants were 191 11th and 12th grade students: 60 who were deaf, 36 who were deaf or hard of hearing, and 95 who were hearing. They completed the Future Perceptions Scale, the Career Decision-Making Self-Efficacy (CDMSE) Scale, and the Self-Efficacy for the Management of Work-Family Conflict Scale. Results indicated that participants who were deaf reported significantly higher levels of future clarity and intensity than the other groups. However, no significant differences were found in career self-efficacy. Hearing status and affiliation and the efficacy to manage future conflict between work and family roles were significant predictors of participants' future clarity. CDMSE was a significant predictor of future planning. Implications for theory and practice are discussed. PMID:26101211
Huang, Mingqian; Kantardzhieva, Albena; Scheffer, Deborah; Liberman, M Charles; Chen, Zheng-Yi
Isl1 is a LIM-homeodomain transcription factor that is critical in the development and differentiation of multiple tissues. In the mouse inner ear, Isl1 is expressed in the prosensory region of otocyst, in young hair cells and supporting cells, and is no longer expressed in postnatal auditory hair cells. To evaluate how continuous Isl1 expression in postnatal hair cells affects hair cell development and cochlear function, we created a transgenic mouse model in which the Pou4f3 promoter drives Isl1 overexpression specifically in hair cells. Isl1 overexpressing hair cells develop normally, as seen by morphology and cochlear functions (auditory brainstem response and otoacoustic emissions). As the mice aged to 17 months, wild-type (WT) controls showed the progressive threshold elevation and outer hair cell loss characteristic of the age-related hearing loss (ARHL) in the background strain (C57BL/6J). In contrast, the Isl1 transgenic mice showed significantly less threshold elevation with survival of hair cells. Further, the Isl1 overexpression protected the ear from noise-induced hearing loss (NIHL): both ABR threshold shifts and hair cell death were significantly reduced when compared with WT littermates. Our model suggests a common mechanism underlying ARHL and NIHL, and provides evidence that hair cell-specific Isl1 expression can promote hair cell survival and therefore minimize the hearing impairment that normally occurs with aging and/or acoustic overexposure. PMID:24048839
Priscila Karla Santana Pereira
Full Text Available TEMA: perda auditiva em neonatos. OBJETIVOS: verificar a prevalência de alterações auditivas em neonatos do Hospital São Paulo, observando se há correlação com as variáveis: peso de nascimento, idade gestacional, relação peso e idade gestacional e fatores de risco para deficiência auditiva. MÉTODO: realizou-se uma análise retrospectiva dos prontuários de 1696 recém nascidos, sendo 648 nascidos pré-termo e 1048 a termo. Todas as crianças foram submetidas à avaliação audiológica constituída por pesquisa das emissões otoacústicas transientes e do reflexo cocleopalpebral e medidas de imitância acústica, estabelecendo-se o diagnóstico do tipo e grau de perda. RESULTADOS: a perda auditiva neurossensorial foi identificada em 0,82% das crianças nascidas a termo, e 3,1% das crianças pré-termo (com diferença estatisticamente significante. A perda auditiva condutiva foi a mais freqüente nas duas populações sendo observada em 14,6% das crianças nascidas a termo e 16,3% das crianças pré-termo. Houve suspeita de alterações do sistema auditivo central em 5,8% das crianças pré-termo e 3,3% das crianças a termo. Na população de crianças nascidas a termo, houve correlação significante entre falha na triagem auditiva e os riscos antecedente familiar e síndrome, sendo 37 vezes maior a chance de uma criança com síndrome falhar na triagem e sete vezes maior a chance de falhar na orelha direita quando esta tiver antecedente familiar de perda auditiva. Quanto menor a idade gestacional (BACKGROUND: hearing loss in newborns. Aim: to verify the prevalence of auditory alterations in newborns of Hospital São Paulo (hospital, observing if there are any correlations with the following variables: birth weight, gestational age, relation weight/gestational age and risk factors for hearing loss. METHOD: A retrospective analysis of the hospital records of 1696 newborns; 648 records of preterm infants and 1048 records of infants born at term. All of the infants had been submitted to an auditory evaluation consisting of: Transient Otoacoustic Emissions, investigation of the cochleal-palpebral reflexes and acoustic imittance tests, identifying the type and level of hearing loss. RESULTS: sensorineural hearing loss was identified in .82% of the infants who were born at term and in 3.1% of the preterm infants - with a statistically significant difference. Conductive hearing loss was the most frequent type of hearing loss in both groups, occurring in 14.6% of the term infants and in 16.3% of the preterm infants. Alteration of the central auditory system was considered as a possible diagnosis for 5.8% of the preterm infants and for 3.3% of the term infants. For the group of infants who were born at term, a significant correlation was observed between failure in the hearing screening test and the presence of risk factors such as family history and presence of a syndrome - the child who presented a syndrome had 37 times more chances of failing in the hearing screening test and seven times more chances of failing in the right ear when there was a family history for hearing loss. The lower the gestational age (< 30 weeks and birth weight (< 1500g, the higher the chances of failing in the hearing screening test (3 times more. CONCLUSION: hearing loss had a higher occurrence in preterm infants who remained in the ICU. Gestational age and birth weight were important variables related to the possibility of failure in the hearing screening test. A correlation was observed between the presence of a syndrome and sensorineural hearing loss in infants who were born at term.
Full Text Available Older listeners are more likely than younger listeners to have difficulties in making temporal discriminations among auditory stimuli presented to one or both ears. In addition, the performance of older listeners is often observed to be more variable than that of younger listeners. The aim of this work was to relate age and hearing loss to temporal processing ability in a group of younger and older listeners with a range of hearing thresholds. Seventy-eight listeners were tested on a set of three temporal discrimination tasks (monaural gap discrimination, bilateral gap discrimination, and binaural discrimination of interaural differences in time. To examine the role of temporal fine structure in these tasks, four types of brief stimuli were used: tone bursts, broad-frequency chirps with rising or falling frequency contours, and random-phase noise bursts. Between-subject group analyses conducted separately for each task revealed substantial increases in temporal thresholds for the older listeners across all three tasks, regardless of stimulus type, as well as significant correlations among the performance of individual listeners across most combinations of tasks and stimuli. Differences in performance were associated with the stimuli in the monaural and binaural tasks, but not the bilateral task. Temporal fine structure differences among the stimuli had the greatest impact on monaural thresholds. Threshold estimate values across all tasks and stimuli did not show any greater variability for the older listeners as compared to the younger listeners. A linear mixed model applied to the data suggested that age and hearing loss are independent factors responsible for temporal processing ability, thus supporting the increasingly accepted hypothesis that temporal processing can be impaired for older compared to younger listeners with similar hearing and/or amounts of hearing loss.
Peelle, Jonathan E.; Troiani, Vanessa; Grossman, Murray; Wingfield, Arthur
Hearing loss is one of the most common complaints in adults over the age of 60 and a major contributor to difficulties in speech comprehension. To examine the effects of hearing ability on the neural processes supporting spoken language processing in humans, we used functional magnetic resonance imaging (fMRI) to monitor brain activity while older adults with age-normal hearing listened to sentences that varied in their linguistic demands. Individual differences in hearing ability predicted t...
Hearing screening of neonates is the key to preventing the most severe consequences of congenital hearing loss. In this paper, the auditory brain stem responses (ABR) of neonates at high risk for hearing impairment at Marmara University Hospital Neonatal Intensive Care Unit are reported. One hundred fifty-four high-risk neonates underwent screening by ABR carried out according to the US Joint Committee on Hearing 1994 Position Statement. One hundred and fourteen of them passed the ...
Vestergaard, Martin David
The purpose of this experiment was to measure temporal acuity and spectral resolution of hearing in new hearing-aid users over a period of time post-fitting, and to demonstrate the extent to which performance might change over time. For one-octave wide maskers with and without spectral and temporal gaps, masking was measured repeatedly over 3 months post-fitting. GRM was characterized as the release from masking under the gap conditions. The cognitive skills of the participants were assessed with two tests for measuring working memory capacity and lexical vigilance. The results showed that while the masking by one-octave wide noise maskers without any gaps was constant over time, GRM increased over time for maskers involving a temporal gap. Moreover, at low frequencies where the subjects had normal hearing-threshold levels, they performed as hearing-impaired for the spectral-gap condition. For the temporal-gap condition, they performed as normally hearing at both low and high frequencies. These results suggest that patients with precipitous hearing loss do not maintain normal spectral resolution through the low-frequency region, in which the hearing threshold levels are otherwise normal. Surprisingly, the results also showed moderate though highly significant correlation between lexical vigilance and GRM. [Work supported by the William Demant Foundation.] a)Currently at CNBH, Dept. Physiol., University of Cambridge, CB2 3EG Cambridge, UK.
Adriane Ribeiro, Teixeira; Andréa Krüger, Gonçalves; Cíntia de La Rocha, Freitas; Cristina Loureiro Chaves, Soldera; Ângelo José Gonçalves, Bós; Ana Maria Pujol Vieira dos, Santos; Sílvia, Dornelles.
Full Text Available INTRODUÇÃO: A perda auditiva provoca dificuldades na compreensão da fala, o que origina afastamento do meio familiar e social. Este isolamento pode estar associado a quadros depressivos. Tipo de estudo: clínico prospectivo. OBJETIVO: Verificar a associação entre perda auditiva e depressão em um grup [...] o de idosos não institucionalizados. MÉTODO: A amostra foi composta por indivíduos com idade igual ou superior a 60 anos, submetidos à avaliação audiológica completa e rastreio de sintomatologia depressiva com a escala de depressão geriátrica (GDS). RESULTADOS: Foram avaliados 54 idosos, sendo 26 (48,1%) do sexo feminino e 28 (51,9%) do sexo masculino. Constatou-se que 39 (72,2%) apresentaram limiares auditivos alterados, sendo 17 (31,5%) com perda auditiva leve e 22 (40,7%) com perda auditiva moderada. Foram evidenciados sinais de depressão em 25 idosos (46,3%), sendo que 22 (40,7%) apresentavam perda auditiva. A análise dos dados evidenciou associação entre a presença de perda auditiva e depressão (p=0,016). Apesar de não significativa (p=0,18), a associação entre o grau de perda auditiva foi positiva em relação à gravidade dos sinais de depressão. CONCLUSÃO: Nos idosos pesquisados, ocorreu forte associação entre a perda auditiva e os sinais de depressão e tendência a existir associação entre o grau de perda auditiva e a gravidade dos sinais de depressão. Abstract in english INTRODUCTION: Hearing loss causes difficulties in speech understanding, which leads away from the family and social environment. This isolation may be associated with depressive disorders. Type of study: clinical prospective. OBJECTIVE: To determine the association between hearing loss and depressio [...] n in a group of non-institutionalized elderly. METHOD: The sample consisted of individuals aged over 60 years, undergoing complete audiological evaluation and screening for depressive symptoms with the Geriatric Depression Scale (GDS). RESULTS: We evaluated 54 elderly, 26 (48.1%) were female and 28 (51.9%) males. It was found that 39 (72.2%) had hearing thresholds change, and 17 (31.5%) with mild hearing loss and 22 (40.7%) with moderate hearing loss. Were evident signs of depression in 25 elderly (46.3%), and 22 (40.7%) had hearing loss. Data analysis showed an association between hearing loss and depression (p = 0.016). Although not significant (p = 0.18), the association between the degree of hearing loss was positive in relation to the severity of the signs of depression. CONCLUSION: In elderly people surveyed, there was a strong association between hearing loss and signs of depression and tendency to be an association between the degree of hearing loss and the severity of the signs of depression.
Full Text Available Abstract Background Sudden sensorineural hearing loss is routinely encountered by the otologist. The etiology is varied and often identifiable. One of the relatively less frequent causes is surgery. Apart from being an established entity with otological surgeries, sensorineural hearing loss has also been known to occur after non-otological procedures under general anesthesia. Commonest amongst these procedures is cardiopulmonary bypass, an association that has long been recognized. However, despite the proposition of diverse hypotheses in the past, the pathophysiology remains unclear. Methods The study is a prospective matched cohort study that will be carried out in Aga Khan University Hospital, Karachi, Pakistan. Participants among exposed would include all those patients who would be undergoing coronary artery bypass surgery in the hospital who fall under the criteria for inclusion. Unexposed group would comprise of patients undergoing a non-bypass procedure of similar duration under the same type of anesthesia who meet the selection criteria. Both these groups will undergo audiometric testing at our hospital on three different occasions during the course of this study. Initially before the procedure to test the baseline hearing capacity; then one week after the procedure to assess any changes in hearing ability following the surgery; and finally a third audiogram at six weeks follow-up to assess further changes in any hearing deficits noted during the second phase of testing. Certain variables including the subjects' demographics and those concerning the procedure itself will be noted and used later for risk factors analysis. A detailed past medical and surgical history will also be obtained. Data analysis would include calculation of relative risk and significance of the results, by running the chi-square test. Other statistical tests like Fisher exact test may then be employed to facilitate data interpretation. Continuous scale may then be employed and multivariate linear regression used. Discussion This study is planned to obtain a better understanding of the correlation between sudden sensorineural hearing loss and cardiopulmonary bypass. Being the first major cohort trial in this line of investigation, the project is designed to identify the existence of any significant relationship between cardiopulmonary bypass and sensorineural hearing deficit.
Full Text Available Aging results in a loss of sensory function, and the effects of hearing impairment can be especially devastating due to reduced communication ability. Older adults with hearing loss report that speech, especially in noisy backgrounds, is uncomfortably loud yet unclear. Hearing loss results in an unbalanced neural representation of speech: the slowly-varying envelope is enhanced, dominating representation in the auditory pathway and perceptual salience at the cost of the rapidly-varying fine structure. We hypothesized that older adults with hearing loss can be trained to compensate for these changes in central auditory processing through directed attention to behaviorally-relevant speech sounds. To that end, we evaluated the effects of auditory-cognitive training in older adults (ages 55-79 with normal hearing and hearing loss. After training, the auditory training group with hearing loss experienced a reduction in the neural representation of the speech envelope presented in noise, approaching levels observed in normal hearing older adults. No changes were noted in the control group. Importantly, changes in speech processing were accompanied by improvements in speech perception. Thus, central processing deficits associated with hearing loss may be partially remediated with training, resulting in real-life benefits for everyday communication.
Full Text Available INTRODUCTION: Many children with hearing impairment present with one or more health-related conditions defined as a co-morbidity in addition to hearing loss. Families and professionals are then faced with various challenges that often complicate the assessment, management and educational placement o [...] f these children. Appropriate holistic intervention is essential for the development and quality of life of the child. This study describes the co-morbidities within the field of occupational therapy, speech therapy and physiotherapy that pre-school children with hearing loss present with at the Centre for Language and Hearing Impaired Children (CLAHIC) and its implications for management. METHOD: A descriptive, retrospective research design was employed. Using a non-probability, purposive sampling strategy the records of 62 children diagnosed with a hearing loss that attended the CLAHIC from 1999 to 2010, were reviewed. RESULTS: The prevalent co-morbidities identified in this study were found mostly within the field of Occupational Therapy and included fine and gross motor delay, visual motor integration disorders and bilateral integration disorders. Further findings indicated that co-morbidities of hearing loss are independent of the degree of the hearing loss. CONCLUSION: The findings suggest that pre-school children with hearing loss, irrespective of the etiology and degree of hearing loss, should be screened for prevalent co-morbidities, such as fine and gross motor difficulties
Kühnel, V; Margolf-Hackl, S; Kiessling, J
In this study the potential benefit of hearing instruments with multi-microphone technology was investigated in laboratory and in field tests for users with severe-to-profound hearing loss. Twenty-one experienced hearing aid users were fitted with high-power multi-microphone hearing instruments (Phonak PowerZoom P4 AZ). The following evaluations were performed: (i) adaptive speech test (SRT for HSM sentence test) in quiet and in noise with their own instrument and the test instrument in the omnidirectional (basic program) and directional mode (party noise profound+zoom algorithm). (ii) Paired comparisons of loudness, sound quality and speech intelligibility for both the omni and zoom program. (iii) Questionnaires on satisfaction and self-assessment of communication in different listening conditions (Oldenburg Inventory). Only 10 subjects achieved 50% correct (SRT) on the sentence test in noise (speech 0 degrees/noise 180 degrees) with both their own instrument and the test instrument in the omnidirectional mode. However, 15 subjects succeeded in the SRT measurement in the directional mode. The average SRT improvement of the directional over the omnidirectional mode was 13.7 dB. Loudness was judged 'medium loud' for both listening programs. Sound quality and intelligibility were rated significantly better for the zoom program. Compared to their own instrument users' satisfaction with the test instrument was significantly higher, especially in noisy listening situations. PMID:11318486
Mao, Johnny C.; Pace, Edward; Pierozynski, Paige; Kou, Zhifeng; Shen, Yimin; VandeVord, Pamela; Haacke, E. Mark; Zhang, Xueguo; Zhang, Jinsheng
The current study used a rat model to investigate the underlying mechanisms of blast-induced tinnitus, hearing loss, and associated traumatic brain injury (TBI). Seven rats were used to evaluate behavioral evidence of tinnitus and hearing loss, and TBI using magnetic resonance imaging following a single 10-msec blast at 14?psi or 194 dB sound pressure level (SPL). The results demonstrated that the blast exposure induced early onset of tinnitus and central hearing impairment at a broad frequen...
Hidehiko Okamoto; Munehisa Fukushima; Henning Teismann; Lothar Lagemann; Tadashi Kitahara; Hidenori Inohara; Ryusuke Kakigi; Christo Pantev
Sudden sensorineural hearing loss is characterized by acute, idiopathic hearing deterioration. We report here the development and evaluation of “constraint-induced sound therapy”, which is based on a well-established neuro-rehabilitation approach, and which is characterized by the plugging of the intact ear (“constraint”) and the simultaneous, extensive stimulation of the affected ear with music. The sudden sensorineural hearing loss patients who received the constraint-induced sound therapy ...
Fernando de Andrade Quintanilha, Ribeiro; Verônica Reche Rodrigues, Gaudino; Caio Dinelli, Pinheiro; Gil Junqueira, Marçal; Edson Ibrahim, Mitre.
Full Text Available INTRODUÇÃO: Parece não haver relação entre o tamanho das perfurações timpânicas e a perda auditiva. Alguns trabalhos na literatura estudaram esta relação, com dados conflitantes e sem uso adequado da metodologia empregada, principalmente quanto à medição do tamanho da perfuração que se faz de modo [...] subjetivo. OBJETIVO: Analisar através de um método objetivo o tamanho dessas perfurações e relacioná-las com perdas auditivas em quatro frequências sonoras. MÉTODO: Estudo retrospectivo de corte transversal. Foram avaliadas 187 perfurações timpânicas através de digitalização de imagem, medidas porcentualmente com o uso do software ImageScope Version 184.108.40.2060 e correlacionadas com os limiares auditivos em quatro frequências. RESULTADOS: Os dados foram avaliados estatisticamente pelo teste de correlação de Pearson, que não demonstrou correlação entre o tamanho da perfuração timpânica e o grau de perda auditiva. CONCLUSÃO: Não há relação significativa entre o tamanho das perfurações timpânicas e as quatro frequências estudadas. Abstract in english INTRODUCTION: There appears to be no relationship between the size of tympanic perforations and hearing loss. Some studies in the literature have assessed this connection, with conflicting data and without proper methodology, especially concerning the measurement of the size of the perforation, wh [...] ich was performed in a subjective manner. OBJECTIVE: To evaluate the size of tympanic perforations and to relate them to hearing loss in four different sound frequencies through the use of an objective method. METHODS: Transversal retrospective study. The present study evaluated 187 perforations through digital imaging, calculated the percentages of the tympanic membrane that was perforated using ImageScope software version 220.127.116.110 and correlated perforations size with hearing loss at four frequencies. RESULTS: Data were statistically analyzed using Pearson's correlation test. CONCLUSION: There was no significant relationship between the size of tympanic perforations and hearing loss in the four analyzed frequencies.
Full Text Available Background and Aim: Hearing aid users complain about a phenomenon called "occlusion effect". The aim of this study was to compare the occlusion effect in normal hearing individuals and those with slight and mild sensory neural hearing loss via Real Ear Measurement.Methods: Sixty volunteers (30 male, 30 female aged 18-55 years were enrolled in this study. Subjects were instructed to vocalize /e/ and /i/ for 5 seconds. Sound pressure level was measured by a probe- microphone and recorded in the ear canal. Occlusion effect and the frequency in which maximum occlusion effect occurs were obtained for each individuals for further analysis.Results: The peak of occlusion effect for /e/ was 10.25 dB and 9.77 dB respectively in 751.9 Hz and 542.98 Hz frequencies in female and male individuals. The maximum occlusion effect occurred with 19.03 dB and 19.10 dB for /i/ and in 518.88 Hz and 440.28 Hz in female and male individuals, in respect. In addition, no significant difference was seen among hearing levels and between genders.Conclusion: The peak of occlusion effect varies significantly among hearing aid users so that the hearing aid must be tuned. Probe-microphone measures will assist in determination where frequency- specific adjustments are needed.
Parner, Erik T; Reefhuis, Jennita
A higher risk of meningitis associated with cochlear implants may be explained in part by a generally higher risk of meningitis in children with severe to profound hearing loss. We investigated whether children with hearing loss have an increased risk of meningitis.
Westmore, G A; Eversden, I D
Noise-induced hearing loss (NIHL) is well reported among devotees of rock 'n' roll music, but less attention has been focused on players of orchestral music. Sound pressure levels have been recorded from within orchestras during performances, and audiometry has been carried out on orchestral musicians. Short-lasting peaks of sound of high amplitude were found to occur, and some players had audiometric changes consistent with NIHL. However, in practice, there seemed to be no threat to the players' continued livelihood, although the additive effect of presbyacusis in later life poses a potential problem. The difficulties of prevention of NIHL and the attenuation of the high sound levels of orchestras do not seem to be completely soluble. PMID:7316860
Mirella Melo, Metidieri; Hugo Fernandes Santos, Rodrigues; Francisco José Motta Barros de, Oliveira Filho; Daniela Pereira, Ferraz; Antonio Fausto de, Almeida Neto; Sandro, Torres.
Full Text Available According to the Ministry of Health (2006), Noise-Induced Hearing Loss (NIHL) is hearing loss caused by prolonged exposure to noise. It is characterized as sensorineural hearing loss and is usually bilateral, irreversible, and progressive while the exposure to noise continues. A NIHL is a predictabl [...] e and preventable disease with an epidemiologically relevant prevalence in urban communities. The hearing loss begins and predominates in the frequencies of 3, 4, and 6 kHz and eventually progresses to 8, 2, 1, 5, and 25 kHz. In Brazil, regulatory standard 15 limits the exposure to continuous noise to no more than 4 hours' exposure to 90 dBA and a maximum level of 85 dB for a full 8-hour working period. As NIHL is a preventable and predictable disease, preventive action by professionals may be able to change the prevalence of hearing loss in noisy environments.
Luciana Lozza de Moraes Marchiori
Full Text Available OBJETIVO: Identificar possível associação entre hipertensão arterial e perda auditiva. Foi realizado um estudo do tipo caso-controle não pareado, na Universidade Norte do Paraná, no Sul do Brasil. MATERIAL E MÉTODO: 154 casos e 154 controles, de ambos os sexos com idade variando de 45 a 64 anos foram incluídos na pesquisa após o cálculo da amostra. A hipertensão foi verificada por medição da pressão arterial e de questionário sistematizado sobre hipertensão e uso de medicamentos para pressão arterial. A audição foi avaliada por audiometria e anamnese audiológica. A técnica de regressão logística não-condicional foi utilizada com o objetivo de controlar a possível ação de confusão ou modificação de efeito exercida por outras variáveis sobre as associações de interesse. RESULTADOS : Pode-se verificar que existe associação significativa entre hipertensão arterial e presença de perda auditiva e que a perda auditiva observada nesta população sugere que a hipertensão arterial age como fator de aceleração da degeneração do aparelho auditivo proveniente da idade. CONCLUSÕES: Os resultados da presente pesquisa, através da constatação da associação entre hipertensão e perda auditiva, servirão de base a uma integração entre cardiologistas, nefrologistas, otorrinolaringologistas, fonoaudiólogos e outros profissionais da área de com alterações provenientes da hipertensão.AIM: To identify likely association between blood hypertension and hearing loss. Design: A non-paired case-control study. Setting: Institutional work carried out at Universidade Norte do Paraná, in South Brazil. MATERIAL AND METHOD: 154 cases and 154 controls, both genders, aged 45 to 64, included in the research after sample estimation. Methodology: Hypertension was verified through blood pressure readings and by a systematized questionnaire about hypertension and the use of medication for blood pressure. Hearing was assessed through tonal threshold audiometrics and audiologic anamneses. Non-conditional logistic regression was used in order to control likely confusion or modification of effect of other variables on interest associations. RESULTS: There is a significant association between blood hypertension and hearing loss. Hearing loss in the population under study suggests that hypertension is an accelerating factor of degeneration of the hearing apparatus due to aging. CONCLUSIONS: The results in this research, through evidence of association between blood hypertension and hearing loss, can allow for an integrated work of cardiologists, nephrologists, otorhinolaryngologists, audiologists and other health professionals concerned with alterations caused by blood hypertension.
I R T, Butler; S, Basson; E, Britz; R, de Wet; G B, Korsten; G, Joubert.
Full Text Available BACKGROUND: Congenital hearing loss affects 3 - 6/1 000 children worldwide. The benefits of early identification of hearing loss and early intervention have been clearly established. There are no previous studies reporting on the age of diagnosis of congenital hearing loss in the Free State province [...] . OBJECTIVES: To determine the age of diagnosis of congenital hearing loss in the Otorhinolaryngology Clinic at Universitas Hospital. Secondary aims included determining age at first visit, as well as the time delay between first visit and diagnosis, and documenting any interventions which took place. METHODS: A retrospective, descriptive study was undertaken, analysing data from 2001 to 2010. RESULTS: A total of 260 cases of congenital hearing loss were analysed. The median age of diagnosis of hearing loss was 44.5 months. The median age of first visit was 40.9 months, and the median delay between first visit and diagnosis was 49 days. CONCLUSIONS: The median age of diagnosis far exceeds national and international benchmarks. This has a profoundly negative impact on the development and outcomes of children with hearing loss. These results have been used to motivate for the expansion of hearing screening and diagnostic services in the province.
Rhee, Chung-Ku; He, Peijie; Jung, Jae Yun; Ahn, Jin-Chul; Chung, Phil-Sang; Lee, Min Young; Suh, Myung-Whan
The primary cause of hearing loss includes damage to cochlear hair cells. Low-level laser therapy (LLLT) has become a popular treatment for damaged nervous systems. Based on the idea that cochlea hair cells and neural cells are from same developmental origin, the effect of LLLT on hearing loss in animal models is evaluated. Hearing loss animal models were established, and the animals were irradiated by 830-nm diode laser once a day for 10 days. Power density of the laser treatment was 900 mW/cm2, and the fluence was 162 to 194 J. The tympanic membrane was evaluated after LLLT. Thresholds of auditory brainstem responses were evaluated before treatment, after gentamicin, and after 10 days of LLLT. Quantitative scanning electron microscopic (SEM) observations were done by counting remaining hair cells. Tympanic membranes were intact at the end of the experiment. No adverse tissue reaction was found. On SEM images, LLLT significantly increased the number of hair cells in middle and basal turns. Hearing was significantly improved by laser irradiation. After LLLT treatment, both the hearing threshold and hair-cell count significantly improved.
Full Text Available Vinaya Manchaiah,1 Berth Danermark,2 Tayebeh Ahmadi,3 David Tomé,4 Fei Zhao,5 Qiang Li,6 Rajalakshmi Krishna,7 Per Germundsson8 1Department of Speech and Hearing Sciences, Lamar University, Beaumont, TX, USA; 2Swedish Institute for Disability Research, Örebro University, Örebro, Sweden; 3Department of Audiology, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran; 4Department of Audiology, School of Allied Health Sciences, Polytechnic Institute of Porto, Vila Nova de Gaia, Portugal; 5Centre for Speech Language Therapy and Hearing, Cardiff Metropolitan University, Cardiff, UK; 6Department of Social Science and Law, Tianjin University of Technology, Tianjin, People’s Republic of China; 7All India Institute of Speech and Hearing, University of Mysore, Mysore, India; 8Department of Health and Welfare Studies, Malmö University, Malmö, Sweden Background: Hearing loss is one of the most common chronic conditions in older adults. In audiology literature, several studies have examined the attitudes and behavior of people with hearing loss; however, not much is known about the manner in which society in general views and perceives hearing loss. This exploratory study was aimed at understanding the social representation of hearing loss (among the general public in the countries of India, Iran, Portugal, and the UK. We also compared these social representations.Materials and methods: The study involved a cross-sectional design, and participants were recruited using the snowball sampling method. A total of 404 people from four countries participated in the study. Data were collected using a free-association task where participants were asked to produce up to five words or phrases that came to mind while thinking about hearing loss. In addition, they were also asked to indicate if each word they presented had positive, neutral, or negative associations in their view. Data were analyzed using various qualitative and quantitative methods.Results: The most frequently occurring categories were: assessment and management; causes of hearing loss; communication difficulties; disability; hearing ability or disability; hearing instruments; negative mental state; the attitudes of others; and sound and acoustics of the environment. Some categories were reported with similar frequency in most countries (eg, causes of hearing loss, communication difficulties, and negative mental state, whereas others differed among countries. Participants in India reported significantly more positive and fewer negative associations when compared to participants from Iran, Portugal, and the UK. However, there was no statistical difference among neutral responses reported among these countries. Also, more differences were noted among these countries than similarities.Conclusion: These findings provide useful insights into the public perception of hearing loss that may prove useful in public education and counseling. Keywords: hearing loss, hearing impairment, social representation, societal attitude, cross-culture, perception of disability
Noise is usually defined either unwanted sound or sound that is harmful to the hearing. Earlier studies have shown that musicians are exposed to sound levels that can be harmful to hearing, and thus music can be considered as noise. Studies have also shown that musicians have hearing problems due to prolonged music exposure. This is also the case among classical musicians. According to the new noise directive, hearing conservation programs directed to entertainment sector are needed. However ...
Brandt, CT; Caye-Thomsen, P; Lund, SP; Worsøe, L; Østergaard, C; Frimodt-Møller, N; Espersen, F; Thomsen, J; Lundgren, Jens Dilling
Hearing loss is a well-known sequelae from meningitis, affecting up to 25% of survivors. However, the principal components of the infectious and inflammatory reaction responsible for the sensorineural hearing loss remain to be identified. The present study aimed to investigate the impact of an augmented neutrophil response on the development of hearing loss and cochlear damage in a model of experimental pneumococcal meningitis in rats. Hearing loss and cochlear damage were assessed by distortion...
Fatima T Husain
Full Text Available We investigated the impact of hearing loss on emotional processing using task- and rest-based functional magnetic resonance imaging. Two age-matched groups of middle-aged participants were recruited: one with bilateral high-frequency hearing loss (HL and a control group with normal hearing (NH. During the task-based portion of the experiment, participants were instructed to rate affective stimuli from the International Affective Digital Sounds database as pleasant, unpleasant, or neutral. In the resting state experiment, participants were told to fixate on a '+' sign on a screen for five minutes. The results of both the task-based and resting state studies suggest that NH and HL patients differ in their emotional response. Specifically, in the task-based study, we found slower response to affective but not neutral sounds by the HL group compared to the NH group. This was reflected in the brain activation patterns, with the NH group employing the expected limbic and auditory regions including the left amygdala, left parahippocampus, right middle temporal gyrus and left superior temporal gyrus to a greater extent in processing affective stimuli when compared to the HL group. In the resting state study, we observed no significant differences in connectivity of the auditory network between the groups. In the dorsal attention network, HL patients exhibited decreased connectivity between seed regions and left insula and left postcentral gyrus compared to controls. The default mode network was also altered, showing increased connectivity between seeds and left middle frontal gyrus in the HL group. Further targeted analysis revealed increased intrinsic connectivity between the right middle temporal gyrus and the right precentral gyrus. The results from both studies suggest neuronal reorganization as a consequence of hearing loss, most notably in networks responding to emotional sounds.
Rasmussen, Rune; Claesson, Magnus; Stangerup, Sven-Eric; Roed, Henrik; Christensen, Ib Jarle; Thomasen, Per Caye; Juhler, Marianne
To evaluate long-term tumor control and hearing preservation rates in patients with vestibular schwannoma treated with fractionated stereotactic radiotherapy (FSRT), comparing hearing preservation rates to an untreated control group. The relationship between radiation dose to the cochlea and hearing preservation was also investigated.
Tashneem, Harris; Soraya, Bardien; H Simon, Schaaf; Lucretia, Petersen; Greetje, de Jong; Johannes J, Fagan.
Full Text Available BACKGROUND: Ototoxicity following aminoglycoside treatment for multidrug-resistant tuberculosis (MDR-TB), is a significant problem. This study documents the incidence of ototoxicity in HIV-positive and HIV-negative patients with MDR-TB and presents clinical guidelines relating to ototoxicity. METHOD [...] S: A prospective cohort study of 153 MDR-TB patients with normal hearing and middle ear status at baseline controlling for 6 mitochondrial mutations associated with aminoglycosiderelated ototoxicity, at Brooklyn Chest Hospital in Cape Town. Pure tone audiometry was performed monthly for 3 months to determine hearing loss. HIV status was recorded, as was the presence of 6 mutations in the MT-RNR1 gene. RESULTS: Fifty-seven per cent developed high-frequency hearing loss. HIV-positive patients (70%) were more likely to develop hearing loss than HIV-negative patients (42%). Of 115 patients who were genetically screened, none had MT-RNR1 mutations. CONCLUSION: Ototoxic hearing loss is common in MDR-TB patients treated with aminoglycosides. HIV-positive patients are at increased risk of ototoxicity. Auditory monitoring and auditory rehabilitation should be an integral part of the package of care of MDR-TB patients.
Venet, Thomas; Campo, Pierre; Thomas, Aurélie; Cour, Chantal; Rieger, Benoît; Cosnier, Frédéric
The neuropharmacological and cochleotoxic effects of styrene can exacerbate the impact of noise on the peripheral auditory receptor. The mechanisms through which co-exposure to noise and styrene impairs hearing are complex as the slowly developing cochleotoxic process can be masked in the short-term by the rapid pharmacological effect on the central nervous system. The current investigation was therefore designed to delineate the auditory frequency range sensitive to noise, to styrene, and to noise and styrene combined. In case of different frequency ranges targeted by noise and styrene, it would be possible to point out the main factor responsible for cases of deafness by looking at the location of the audiometric deficits. Male Brown-Norway rats were exposed to 600-ppm styrene, to an octave band noise centered at 8 kHz, or to both noise and styrene. The noise exposure was of two different types: impulse noise with a LEX,8h (equivalent continuous noise level averaged over 8 h) of 80 dB and continuous noise with a LEX,8 h of 85 dB SPL. Hearing was tested using a non-invasive technique based on distortion product otoacoustic emissions. Hearing data were completed with histological analysis of cochleae. The results showed that exposure to styrene alone caused outer hair cell losses in the apical cochlear region, which discriminates low frequencies. In contrast, noise-induced hearing loss was located at half an octave above the central frequency of the spectrum, around 10-12 kHz. Damage due to impulse noise was significantly exacerbated by styrene, and the noise spectrum defined the location of the cochlear trauma. Combined exposure caused greater cell losses than the sum of losses measured with the impulse noise and styrene alone. The fact that the tonotopicity of the styrene-induced damage depends on the associated noise spectrum complicates the diagnosis of styrene-related hearing loss with a tone-frequency audiometric approach. In conclusion, there is not really a frequency specificity of impairments due to styrene. PMID:25689156
Kloepper, L N; Nachtigall, P E; Gisiner, R; Breese, M
Toothed whales and dolphins possess a hypertrophied auditory system that allows for the production and hearing of ultrasonic signals. Although the fossil record provides information on the evolution of the auditory structures found in extant odontocetes, it cannot provide information on the evolutionary pressures leading to the hypertrophied auditory system. Investigating the effect of hearing loss may provide evidence for the reason for the development of high-frequency hearing in echolocating animals by demonstrating how high-frequency hearing assists in the functioning echolocation system. The discrimination abilities of a false killer whale (Pseudorca crassidens) were measured prior to and after documented high-frequency hearing loss. In 1992, the subject had good hearing and could hear at frequencies up to 100 kHz. In 2008, the subject had lost hearing at frequencies above 40 kHz. First in 1992, and then again in 2008, the subject performed an identical echolocation task, discriminating between machined hollow aluminum cylinder targets of differing wall thickness. Performances were recorded for individual target differences and compared between both experimental years. Performances on individual targets dropped between 1992 and 2008, with a maximum performance reduction of 36.1%. These data indicate that, with a loss in high-frequency hearing, there was a concomitant reduction in echolocation discrimination ability, and suggest that the development of a hypertrophied auditory system capable of hearing at ultrasonic frequencies evolved in response to pressures for fine-scale echolocation discrimination. PMID:20952621
Manpreet Singh Nanda
Full Text Available Background: Chronic Suppurative Otitis Media (CSOM is the major cause of hearing impairment, mainly conductive type of hearing loss. The occurrence of sensorineural hearing loss (SNHL in CSOM is controversial and the controversy is more for safe mucosal type. This study aims to assess the association between SNHL and safe mucosal CSOM and its relation to patient's age, sex, duration of disease, active or inactive disease and speech frequencies. Methods: 100 patients with unilateral mucosal type of CSOM with normal contralateral ear were included in the study. The infected ear was taken as study ear and normal ear as control ear in all patients. All patients underwent hearing assessment by pure tone audiometry for both ears. In case of active disease, ear discharge was first cleared and then audiometric assessment done. Results were statistically compared in all patients for both study and control ears using parameters of patient's age, sex, duration of disease, speech frequency and active or inactive disease. Results: There was significant higher number of study ears with CSOM having average bone conduction threshold of all frequencies above 25 decibels which implies SNHL (21% compared to control contralateral ears without infection (5%. There was higher incidence of SNHL at higher speech frequencies. The incidence also increased with age of patient and duration of disease. The incidence was higher in active stage than inactive or quiescent stage. There was no difference among males and females. Conclusion: Safe mucosal CSOM can cause significant SNHL and risk increases with increasing age, duration of disease, higher speech frequencies and presence of active disease. [Int J Res Med Sci 2015; 3(3.000: 551-555
Abbate, Carmelo; Concetto, Giorgianni; Fortunato, Munaò; Brecciaroli, Renato; Tringali, Maria Antonietta; Beninato, Giovanni; D'Arrigo, Graziella; Domenico, Germanò
The aim of the study is to investigate how environmental factors, associated with exposure to industrial noise, affect the development of chronic noise-induced hearing loss. The study was conducted on 186 male subjects working in two bottling plants, situated respectively in a small farming community, and in a medium-sized city with significant levels of noise pollution. Levels of occupational exposure were the same for the two groups. The subjects were selected by means of a preliminary medical examination, and exposed to tonal hearing tests and acoustic impedance tests. Statistical analysis was performed on hearing threshold values obtained at the frequencies of 500, 1000, 2000 and 4000 Hz. The comparison between the thresholds obtained in the two groups showed a statistically significant difference, especially at the frequency of 4000 Hz and for occupational exposure exceeding 17 yr. The results led us to conclude that environmental factors, and urban noise in particular, influence the onset and development of occupational acoustic trauma, and that those working in the country are significantly less affected than those in the city. Since occupational exposure was the same for both groups, their different responses must therefore be interpreted as due to differences in non-occupational exposure, in turn dependent on different opportunities for rest from noise and different levels of exposure to noise pollution. PMID:16418922
Purpose: To determine the relationship between the radiation dose to the inner ear and long-term hearing loss. Methods and Materials: Eligible patients included those receiving curative radiotherapy (RT) for head-and-neck cancer. After enrollment, patients underwent three-dimensional conformal RT planning and delivery (180-200 cGy/fraction) appropriate for their disease site and stage. The inner ear was contoured on axial CT planning images. Dose-volume histograms, as well as the mean and maximal dose for each structure, were calculated. Patients underwent pure tone audiometry at baseline (before treatment) and 1, 6, 12, 24, and 36 months after RT. The threshold level (the greater the value, the more hearing loss) in decibels was recorded for 250, 500, 1000, 2000, 4000, and 8000 Hz. For patients receiving predominantly unilateral RT, the contralateral ear served as the de facto control. The differences in threshold level between the ipsilateral and contralateral ears were calculated, and the temporal pattern and dose-response relation of hearing loss were analyzed using statistical methods that take into account the correlation between two ears in the same subject and repeated, sequential measurements of each subject. Results: Of the 40 patients enrolled in this study, 35 qualified for analysis. Four patients who received concurrent chemotherapy and RT were analyzed separately. The 31 unilaterally treated patients received a median dose of 47.4 Gy (range, 14.1-68.8 Gy) to the ipsilateral inner ear and 4.2 Gy (range, 0.5-31.3 Gy) to the contralateral inner ear. Hearing loss was associated with the radiation dose received by the inner ear (loss of 210dB was observed in ears receiving ?45 Gy) and was most appreciable in the higher frequencies (?2000 Hz). For a 60-year-old patient with no previous hearing loss in either ear, after receiving 45 Gy, the ipsilateral ear, according to our clinical model, would have a 19.3-dB (95% confidence interval [CI], 15.5-23.0) and 5.4-dB (95% CI, 3.5-7.5) hearing decrement compared with the contralateral ear for 8000 Hz and 1000 Hz, respectively. Age and an initial hearing difference within an ear pair also affected hearing loss. The baseline hearing threshold was inversely related to radiation-induced hearing loss. The degree of hearing loss was dependent on the frequency tested, age, baseline hearing, and baseline difference in hearing between a patient's two ears. Conclusion: High-frequency (?2000 Hz) hearing acuity worsens significantly after RT in a dose-dependent fashion. A larger number of patients needs to be studied to validate these results. This knowledge can be applied to create guidelines regarding future dose limits to the auditory apparatus for patients undergoing head-and-neck RT
As the use of leaded gasoline has ceased in the last decade, background lead exposure has generally been reduced. The aim of this study was to examine the effect of low-level lead exposure on human hearing loss. This study was conducted in a steel plant and 412 workers were recruited from all over the plant. Personal information such as demographics and work history was obtained through a questionnaire. All subjects took part in an audiometric examination of hearing thresholds, for both ears, with air-conducted pure tones at frequencies of 500, 1000, 2000, 3000, 4000, 6000 and 8000 Hz. Subjects' blood samples were collected and analyzed for levels of manganese, copper, zinc, arsenic, cadmium and lead with inductive couple plasma-mass spectrometry. Meanwhile, noise levels in different working zones were determined using a sound level meter with A-weighting network. Only subjects with hearing loss difference of no more than 15 dB between both ears and had no congenital abnormalities were included in further data analysis. Lead was the only metal in blood found significantly correlated with hearing loss for most tested sound frequencies (p < 0.05 to p < 0.0001). After adjustment for age and noise level, the logistic regression model analysis indicated that elevated blood lead over 7 ?g/dL was significantly associated with hearing loss at the sound frequencies of 3000 through 8000 Hz with odds ratios raging from 3.06 to 6.26 (p < 0.05 ? p < 0.005). We concluded that elevated blood lead at level below 10 ?g/dL might enhance the noise-induced hearing loss. Future research needs to further explore the detailed mechanism.
Zhang, Dai; Ma, Yuewen
The occurrence of sudden sensorineural hearing loss (SSHL) affects not only cochlear activity but also neural activity in the central auditory system. Repetitive transcranial magnetic stimulation (rTMS) above the auditory cortex has been reported to improve auditory processing and to reduce the perception of tinnitus, which results from network dysfunction involving both auditory and non-auditory brain regions. SSHL patients who were refractory to standard corticosteroid therapy (SCT) and hyperbaric oxygen (HBO) therapy received 20 sessions of 1?Hz rTMS to the temporoparietal junction ipsilateral to the symptomatic ear (rTMS group). RTMS therapy administered in addition to SCT and HBO therapy resulted in significantly greater recovery of hearing function and improvement of tinnitus perception compared SCT and HBO therapy without rTMS therapy. Additionally, the single photon emission computed tomography (SPECT) measurements obtained in a subgroup of patients suggested that the rTMS therapy could have alleviated the decrease in regional cerebral brain flow (rCBF) in SSHL patients. RTMS appears to be an effective, practical, and safe treatment strategy for SSHL. PMID:26463446
Zhang, Dai; Ma, Yuewen
The occurrence of sudden sensorineural hearing loss (SSHL) affects not only cochlear activity but also neural activity in the central auditory system. Repetitive transcranial magnetic stimulation (rTMS) above the auditory cortex has been reported to improve auditory processing and to reduce the perception of tinnitus, which results from network dysfunction involving both auditory and non-auditory brain regions. SSHL patients who were refractory to standard corticosteroid therapy (SCT) and hyperbaric oxygen (HBO) therapy received 20 sessions of 1?Hz rTMS to the temporoparietal junction ipsilateral to the symptomatic ear (rTMS group). RTMS therapy administered in addition to SCT and HBO therapy resulted in significantly greater recovery of hearing function and improvement of tinnitus perception compared SCT and HBO therapy without rTMS therapy. Additionally, the single photon emission computed tomography (SPECT) measurements obtained in a subgroup of patients suggested that the rTMS therapy could have alleviated the decrease in regional cerebral brain flow (rCBF) in SSHL patients. RTMS appears to be an effective, practical, and safe treatment strategy for SSHL. PMID:26463446
Vuckovic, Dragana; Dawson, Sally; Scheffer, Deborah I; Rantanen, Taina; Morgan, Anna; Di Stazio, Mariateresa; Vozzi, Diego; Nutile, Teresa; Concas, Maria P; Biino, Ginevra; Nolan, Lisa; Bahl, Aileen; Loukola, Anu; Viljanen, Anne; Davis, Adrian; Ciullo, Marina; Corey, David P; Pirastu, Mario; Gasparini, Paolo; Girotto, Giorgia
Hearing loss and individual differences in normal hearing both have a substantial genetic basis. Although many new genes contributing to deafness have been identified, very little is known about genes/variants modulating the normal range of hearing ability. To fill this gap, we performed a two-stage meta-analysis on hearing thresholds (tested at 0.25, 0.5, 1, 2, 4, 8 kHz) and on pure-tone averages (low-, medium- and high-frequency thresholds grouped) in several isolated populations from Italy and Central Asia (total N = 2636). Here, we detected two genome-wide significant loci close to PCDH20 and SLC28A3 (top hits: rs78043697, P = 4.71E-10 and rs7032430, P = 2.39E-09, respectively). For both loci, we sought replication in two independent cohorts: B58C from the UK (N = 5892) and FITSA from Finland (N = 270). Both loci were successfully replicated at a nominal level of significance (P hair cells, further suggesting them as good candidates for modulatory genes in the auditory system. Sequencing data revealed no functional variants in the coding region of PCDH20 or SLC28A3, suggesting that variation in regulatory sequences may affect expression. Overall, these results contribute to a better understanding of the complex mechanisms underlying human hearing function. PMID:26188009
Approximately 15 % of Swedish people experience tinnitus, but only 2.4 % of them experience severe problems. Treatment modalities for tinnitus are varied, but the most common treatment model is counselling. The majority of patients with tinnitus report some degree of hearing loss, and in addition, hearing aids have been used for many years in patients who suffer from both tinnitus and hearing impairment. The aim of the present thesis was to investigate the disease management and identify the ...
Rout, Nachiketa; Singh, Uday
Abstract. It is crucial to understand factors which delay the commencement of aural habilitation in children. Alleviating the factors will help reducing the delay to an extent in a developing country like India where universal newborn hearing screening programs is yet to begin at a national level. The present study aims to find age of suspicion, identification and intervention availed for children with hearing loss who approached hearing evaluation camps conducted in rural West Bengal. Data w...
Inoue, Y; Inoue, T; Tanaka, Y
Small dip-shaped hearing loss may be frequently observed on Bekesy audiograms in ears without any hearing loss on pure tone audiograms. Hearing tests and otoacoustic emission measurements were performed in club member of 2 senior high schools (K-D School and S-D School), in order to determine any relationship between inner ear impairments and the small dips on Bekesy audiograms. In the kendo, soccer, tennis and orchestral music clubs of K-D School micro-dips in depth over 10 dB were found to have incidences between 40% and 53%, and the micro-dips were distributed in frequencies above 5 kHz. In the of kendo, tennis, brass band and tea ceremony clubs of S-D School the incidences of micro-dips ears were between 30% and 48%, and the micro-dips tended to be distributed in higher frequencies except in the tea ceremony club. The micro-dips in the ears of the tea ceremony club members were distributed over all the frequencies examined, but most of them disappeared when counted for dip size above 15 dB remaining an ear at 7.5 kHz. Incidences of earphone or headphone users as a hobby were in the range of 30 to 70% in members of all clubs. There were no characteristic findings of clubs in the incidences of the earphone or headphone users. The degree of association between the micro-dip ears and the use of earphone or headphone was low. C-EOAEs which had a 6 ms or longer duration of evoked otoacoustic emissions were detected with an incidence of 40 to 65% and there was a significant association between the micro-dip ears and the C-EOAE ears. Incidences of spontaneous otoacoustic emissions were between 26% and 28% in all clubs and there were differences in the incidences between sexes. The frequency distribution of the spontaneous otoacoustic emissions were remarkably different to that of the micro-dips. To determine whether the C-EOAEs express a predisposition to inner ear susceptibility to noise-induced hearing loss and to ascertain that the micro-dip is a precursor notice to noise-induced hearing loss, further follow-up surveys are needed. PMID:8934778
Imtiaz, Ayesha; Kohrman, David C.; Naz, Sadaf
More than 360 million humans are affected with some degree of hearing loss, either early or later in life. A genetic cause for the disorder is present in a majority of the cases. We mapped a locus (DFNB101) for hearing loss in humans to chromosome 5q in a consanguineous Pakistani family. Exome sequencing revealed an insertion mutation in GRXCR2 as the cause of moderate to severe and likely progressive hearing loss in the affected individuals of the family. The frameshift mutation is predicted...
Atcherson, Samuel R.; Johnson, Marni I.
Hearing, or auditory processing, involves the use of many hearing skills in a single or combined fashion. The sounds that humans hear can be characterized by their intensity (loudness), frequency (pitch), and timing. Impairment of any of the auditory structures from the visible ear to the central auditory nervous system within the brain can have a…
Full Text Available Objective: Determining the frequency of hearing disorders and hearing aid using in the clients referring to the Avesina education and health center, audiometry clinic, 1377. Method and Material: This is an assesive-descriptive survey that conducted on more than 2053 (1234 males and 819 females who referred for audiometry after examination by a physician. Case history, otoscopy, PTA, speech and immittance audiometry were conducted for all the clients. The findings were expressed in tables and diagrams of frequency. The age and sex relationship. All types of hearing losses and the number of the hearing-impaired clients need a hearing aid were assessed. Findings: 56% of this population were hearing-impaired and 44% had normal hearing were hearing. 60% were males and 40% females. Of the hearing-impaired, 44% had SNHL, 35.6% CHL and 8.2% mixed hearing loss. The hearing aid was prescribed for 204 (83 females and121 males if they need that only 20 females and 32 males wear it. Conclusion: It this sample, SNHL is of higher frequency. According to this survey, the more the age, the more the hearing aid is accepted (85% of wearer are more than 49 the prevalence of the hearing impaired males are more than females (60% versus 40%. Only 25% of the hearing-impaired wear hearing aids.
Background and purpose: Sensori-neural hearing loss (SNHL) is a common complication to radiation therapy in the upper head and neck region. In this study, we estimated the dose response relationship for SNHL with adjustment for pre-therapeutic risk factors. Patients and methods: The pre- and post-therapeutic hearing levels were recorded in a previously published study of 20 patients receiving radiotherapy for nasopharyngeal carcinoma. In the present study, the dose to the inner ear of these patients was estimated with a computed tomography (CT) based treatment planning system. CT data from a 'proxy patient' were used for patients with no available CT scan. SNHL was analyzed as a function of radiation dose and potential risk factors were tested. Results: The incidence of SNHL increased significantly with increasing dose to the cochlea. Increasing patient's age, and decreasing pre-therapeutic hearing level were statistically significantly associated with an increased risk of SNHL. A nomogram is presented for estimating individualized dose constraints of potential use in treatment planning. Conclusions: The inner ear is a critical structure in patients with nasopharyngeal carcinoma and the dose to the inner ear should be carefully considered when planning radiation treatment in this region
Keller, James M.; Neely, Harold R.; Latoche, Joseph R.; Noben-Trauth, Konrad
Studies using inbred strains of mice have been invaluable for identifying alleles that adversely affect hearing. However, the efficacy of those studies is limited by the phenotypes that these strains express and the alleles that they segregate. Here, by selectively breeding phenotypically and genetically heterogeneous NIH Swiss mice, we generated two lines—the all-frequency hearing loss (AFHL) line and the high-frequency hearing loss (HFHL) line—with differential hearing loss. The AFHL line e...
Helvik, Anne-Sofie; Krokstad, Steinar; TAMBS, KRISTIAN
Background: We explore the possible consequences of measured hearing impairment (HI) and perceived hearing difficulties for early retirement in a large population-based study. Furthermore, we study whether having a part-time position was associated with measured HI and perceived hearing difficulties in the same population. Methods: This study included 25 740 persons from the Nord-Trøndelag Health Study (HUNT) aged 20–54 years at baseline in HUNT1 (1984–1986) who also participated in the follo...
Vignesh, S S; Jaya, V; Moses, Anand; Muraleedharan, A
Diabetes mellitus (DM) is a metabolic disorder caused by hyperglycemia which leads to dysfunction of various organs. Hearing acuity is equally hindered by this disorder. Among individuals with DM audiological characteristics of DM type 1 are of great concern in the literature. This study aims at establishing high frequency audiometry (HFA) as a useful tool in identifying early onset of hearing loss in individuals with DM type 2. 20 non-diabetic participants and 20 individuals with DM type 2 in the age range of 20-40 years were considered for the study. Subjects in both groups underwent otoscopic examination, PTA at 0.25, 0.5, 1, 2, 4 and 8 kHz and HFA at 9, 10, 11.2, 12.5, 14 and 16 kHz. Results revealed statistically significant difference in thresholds of both PTA and HFA at all frequencies across the group, but the mean threshold difference between the diabetic and non-diabetic group was marked in HFA than in PTA. In the diabetic subjects the thresholds of PTA was within 25 dBHL at all frequencies when compared to the thresholds of HFA. Individuals with DM type 2 showed bilateral symmetrical mild hearing loss in HFA and the hearing loss increased with ascending test frequencies from 9,000 to 16,000 Hz. Mild hearing loss in HFA is an indicator for early onset of hearing loss in DM type 2. Hence this present study emphasis the clinical utility of HFA in young adults with DM type 2. PMID:26405656
Amberley V. Ostevik
Full Text Available Open-fit hearing aids (OFHAs may be of benefit for some individuals with chronic outer and middle ear conditions for which boneanchored hearing devices (BAHDs are normally recommended. The purpose of this study was to compare performance between OFHAs and BAHDs. A Starkey Destiny 800 OFHA was fit on eight adult BAHD users and speech perception measures in quiet and in background noise were compared under two different test conditions: i BAHD only and ii OFHA only. Equivalent outcome measure performance between these two conditions suggests that the OFHA was able to provide sufficient amplification for mild to moderate degrees of hearing loss (pure-tone averages (PTAs less than 47 dB HL. The improved speech perception performances and increased loudness ratings observed for several of the participants with moderately-severe to severe degrees of hearing loss (PTAs of 47 dB HL or greater in the BAHD only condition suggest that the OFHA did not provide sufficient amplification for these individuals. Therefore, OFHAs may be a successful alternative to the BAHD for individuals with no more than a moderate conductive hearing loss who are unable or unwilling to undergo implant surgery or unable to wear conventional hearing aids due to allergies, irritation, or chronic infection associated with the ear being blocked with a shell or earmold.
Giselle Goulart de Oliveira, Matos; Silvana, Frota.
Full Text Available OBJETIVO: Avaliar a resolução temporal em adultos com perdas auditivas sensorioneurais de graus leve e moderado, por meio do teste Gaps in Noise (GIN), a fim de verificar se essas perdas influenciam no desempenho do teste. MÉTODOS: Foram avaliados 57 pacientes, com idades entre 20 e 59 anos (30 home [...] ns e 27 mulheres), que realizaram anamnese, avaliação otorrinolaringológica, avaliação audiológica básica e triagem do processamento auditivo, com o teste Dicótico de Dígitos. Os sujeitos foram alocados nos grupos G1 (audição normal), G2 (perda auditiva leve) e G3 (perda moderada). Foi realizada análise estatística apropriada e o nível de significância adotado foi de 5%. RESULTADOS: Observou-se presença significativa de homens no grupo com perda auditiva. Não foram encontradas diferenças significativas no desempenho do referido teste entre os grupos. Porém, no grupo controle, foram observados piores desempenhos, quando comparados com o critério de normalidade previsto para adultos jovens brasileiros. A média do limiar de detecção de gaps, da amostra geral, foi de 8,2 ms, em ambas as orelhas, e a média das porcentagens de acertos foi de 49,7% para a orelha direita (OD) e de 50,6% para a orelha esquerda (OE). CONCLUSÃO: A habilidade de resolução temporal avaliada pelo teste GIN não sofre influência da perda auditiva sensorioneural de graus leve e moderado, tanto nos limiares de detecção de gaps quanto na porcentagem de acertos, em ambas as orelhas. Abstract in english PURPOSE: To evaluate temporal resolution in adults with mild and moderate sensorineural hearing loss using the Gaps in Noise (GIN) test to determine whether these losses affect the test performance. METHODS: Fifty-seven patients between 20 and 59 years of age (30 men and 27 women) were evaluated; th [...] ese patients had a complete medical history taken and underwent ENT examination, basic audiological evaluation, and auditory screening via the dichotic digits test. The subjects were divided into three groups: G1 (normal hearing), G2 (mild hearing loss), and G3 (moderate hearing loss). The appropriate statistical analysis was performed, and the adopted level of significance was 5%. RESULTS: A significant proportion of men was observed in the group with hearing loss. There were no significant differences in test performance between the groups. However, the control group's performance was worse than the normality criteria set for young Brazilian adults. The mean gap detection threshold for the total sample was 8.2 ms in both ears, and the mean percentage of correct responses was 49.7% for the right ear (RE) and 50.6% for the left ear (LE). CONCLUSION: The temporal resolution evaluated by the GIN test was not influenced by mild-to-moderate sensorineural hearing loss either in the gap detection thresholds or in the percentage of correct responses for both ears.
Hendershot, Candace; Pakulski, Lori A.; Thompson, Amy; Dowling, Jamie; Price, James H.
Young people are likely to experience noise-induced hearing loss (NIHL), as the use of personal listening devices and other damaging factors (e.g., video games) increases. Little research has examined the role of school health personnel in the prevention and early identification of hearing impairment. A 32-item, valid and reliable survey was…
McFadden, Brittany; Pittman, Andrea
Purpose: The purpose of the present study was to examine the effect of minimal hearing loss (HL) on children's ability to perform simultaneous tasks in quiet and in noise. Method: Ten children with minimal HL and 11 children with normal hearing (NH) participated. Both groups ranged in age from 8 to 12 years. The children categorized common words…
McFadden, Sandra L; Woo, Jenifer M; Michalak, Nathan; Ding, Dalian
Vitamin C (ascorbate) is a water-soluble, low molecular weight antioxidant that works in conjunction with glutathione and other cellular antioxidants, and is effective against a variety of reactive oxygen species, including superoxide and hydroxyl radicals that have been implicated in the etiology of noise-induced hearing loss (NIHL). Whereas most animals can manufacture their own vitamin C, humans and a few other mammals such as guinea pigs lack the terminal enzyme for vitamin C synthesis and must obtain it from dietary sources. To determine if susceptibility to NIHL could be influenced by manipulating dietary levels of vitamin C, albino guinea pigs were raised for 35 days on a diet with normal, supplemented or deficient levels of ascorbate, then exposed to 4 kHz octave band noise at 114 dB SPL for 6 h to induce permanent threshold shifts (PTS) of the scalp-recorded auditory brainstem response. Animals that received the highest levels of dietary ascorbate developed significantly less PTS for click stimuli and 4, 8, 12, and 16 kHz tones than animals on normal and deficient diets. Outer hair cell loss was minimal in all groups after noise exposure, but permanent damage to stereocilia were observed in noise-exposed ears. The results support the hypothesis that dietary factors influence individual susceptibility to hearing loss, and suggest that high levels of vitamin C may be beneficial in reducing susceptibility to NIHL. PMID:15811712
In our study, 43 patients whose ears were presumably irradiated, were examined periodically before and after the irradiation; 10 were found to be affected by the sensorineural hearing loss, and these 10 were classified into two types. Type I; Patients of this group had a hearing impairment during or soon after irradiation and usually revealed marked deterioration of bone conduction in high frequencies accompanied by worsening of air conduction in low frequencies. The impaired hearing of this group soon recovered to the pre-treatment level. Type II; Patients of this group developed a slow progressive sensorineural hearing loss. They noticed the deafness with tinnitus several months after irradiation. To clarify the mechanism of the sensorineural hearing loss, histopathological investigations were done using nembutal anesthetized guinea pigs which were irradiated in the confined ear region unilaterally. We also examined histopathologically one human temporal bone belonging to a patient who had been irradiated for middle ear carcinoma. The histopathology of the guinea pigs and human case revealed the following conclusions: Type I hearing loss may be caused by toxic labyrinthitis secondary to the radiation otitis media or by the aseptic labyrinthitis as the result of hyperemia and increased permeability of the irradiated blood vessels in the cochlea. Type II hearing loss may be caused by the late rediation response of the cochleal blood vessels i.e. by the vasculitis which gives rise to obliteration of the vascular lumen and affects the blood supply of the hair cells. (author)
Ana Cláudia Mirandola Barbosa, Reis; Ana Claudia Figueiredo, Frizzo; Myriam de Lima, Isaac; Cristiane Fregonesi Dutra, Garcia; Carolina Araújo Rodrigues, Funayama; Maria Cecília Martinelli, Iório.
Full Text Available INTRODUÇÃO: As avaliações comportamentais e eletrofisiológicas auditivas contribuem para o entendimento do sistema auditivo e do processo de intervenção. OBJETIVO: Estudar P300 em indivíduos com perda auditiva sensorioneural severa ou profunda. MÉTODO: Estudo prospectivo transversal descritivo. Par [...] ticiparam 29 indivíduos, de ambos os sexos, com idade entre 18 e 45 anos com perda auditiva sensorioneural, congênita severa ou profunda e sem comorbidades, avaliados por meio de avaliação audiológica comportamental e potencial evocado auditivo de longa latência. RESULTADOS: O registro da onda P3 foi obtido em 17 indivíduos, com latência e amplitude média de 326,97 ms e 3,76V, respectivamente. Houve diferenças significativas da medida de latência em relação à idade e da amplitude segundo o grau da perda auditiva. Evidenciou-se associação do resultado do P300 aos graus de perda auditiva (p = 0,04) e ao canal de comunicação auditiva predominante (p = 0,0001) e ao tempo de privação auditiva (teste exato de Fisher). CONCLUSÕES: P300 pode ser registrado em indivíduos com perda auditiva sensorioneural congênita e colaborar para a compreensão do desenvolvimento cortical auditivo e ser preditor do resultado da intervenção. Abstract in english INTRODUCTION: Behavioral and electrophysiological auditory evaluations contribute to the understanding of the auditory system and of the process of intervention. OBJECTIVE: To study P300 in subjects with severe or profound sensorineural hearing loss. METHODS: This was a descriptive cross-sectional [...] prospective study. It included 29 individuals of both genders with severe or profound sensorineural hearing loss without other type of disorders, aged 11 to 42 years; all were assessed by behavioral audiological evaluation and auditory evoked potentials. RESULTS: A recording of the P3 wave was obtained in 17 individuals, with a mean latency of 326.97 ms and mean amplitude of 3.76 V. There were significant differences in latency in relation to age and in amplitude according to degree of hearing loss. There was a statistically significant association of the P300 results with the degrees of hearing loss (p = 0.04), with the predominant auditory communication channels (p
Kale, Sushrut; Heinz, Michael G
The ability of auditory-nerve (AN) fibers to encode modulation frequencies, as characterized by temporal modulation transfer functions (TMTFs), generally shows a low-pass shape with a cut-off frequency that increases with fiber characteristic frequency (CF). Because AN-fiber bandwidth increases with CF, this result has been interpreted to suggest that peripheral filtering has a significant effect on limiting the encoding of higher modulation frequencies. Sensorineural hearing loss (SNHL), which is typically associated with broadened tuning, is thus predicted to increase the range of modulation frequencies encoded; however, perceptual studies have generally not supported this prediction. The present study sought to determine whether the range of modulation frequencies encoded by AN fibers is affected by SNHL, and whether the effects of SNHL on envelope coding are similar at all modulation frequencies within the TMTF passband. Modulation response gain for sinusoidally amplitude modulated (SAM) tones was measured as a function of modulation frequency, with the carrier frequency placed at fiber CF. TMTFs were compared between normal-hearing chinchillas and chinchillas with a noise-induced hearing loss for which AN fibers had significantly broadened tuning. Synchrony and phase responses for individual SAM tone components were quantified to explore a variety of factors that can influence modulation coding. Modulation gain was found to be higher than normal in noise-exposed fibers across the entire range of modulation frequencies encoded by AN fibers. The range of modulation frequencies encoded by noise-exposed AN fibers was not affected by SNHL, as quantified by TMTF 3- and 10-dB cut-off frequencies. These results suggest that physiological factors other than peripheral filtering may have a significant role in determining the range of modulation frequencies encoded in AN fibers. Furthermore, these neural data may help to explain the lack of a consistent association between perceptual measures of temporal resolution and degraded frequency selectivity. PMID:22366500
Sudan, Madhuri; Kheifets, Leeka
Children today are exposed to cell phones early in life, and may be the most vulnerable if exposure is harmful to health. We investigated the association between cell phone use and hearing loss in children.
Honoré, Henriette B; Bentzen, Søren; Møller, Kitty; Grau, Cai
Sensori-neural hearing loss (SNHL) is a common complication to radiation therapy in the upper head and neck region. In this study, we estimated the dose response relationship for SNHL with adjustment for pre-therapeutic risk factors.
Yang, Ming; Chen, Hua-Jun; Liu, Bin; Huang, Zhi-Chun; Feng, Yuan; Li, Jing; Chen, Jing-Ya; Zhang, Ling-Ling; Ji, Hui; Feng, Xu; Zhu, Xin; Teng, Gao-Jun
Alterations of brain structure and functional connectivity have been described in patients with hearing impairments due to distinct pathogenesis; however, the influence of unilateral hearing loss (UHL) on brain morphology and regional brain activity is still not completely understood. In this study, we aim to investigate regional brain structural and functional alterations in patients with UHL. T1-weighted volumetric images and task-free fMRIs were acquired from 14 patients with right-sided UHL (pure tone average ? 40 dB HL) and 19 healthy controls. Hearing ability was assessed by pure tone audiometry. Voxel-based morphometry (VBM) was performed to detect brain regions with changed gray matter volume or white matter volume in UHL. The amplitude of low-frequency fluctuation (ALFF) was calculated to analyze brain activity at the baseline and was compared between two groups. Compared with controls, UHL patients showed decreased gray matter volume in bilateral posterior cingulate gyrus and precuneus, left superior/middle/inferior temporal gyrus, and right parahippocampal gyrus and lingual gyrus. Meanwhile, patients showed significantly decreased ALFF in bilateral precuneus, left inferior parietal lobule, and right inferior frontal gyrus and insula and increased ALFF in right inferior and middle temporal gyrus. These findings suggest that chronic UHL could induce brain morphological changes and is associated with aberrant baseline brain activity. PMID:25093284
Elfa Janeth, Vargas-Díaz; Liliana Isabel, Neira-Torres.
Full Text Available Antecedentes. Según el Departamento Administrativo Nacional de Estadística (2005), en Colombia se estima que un 17,3% de la población censada tiene limitaciones permanentes para oír, de los cuales 24.547 son menores de 10 años. Objetivo. El estudio se propuso determinar la prevalencia nacional de la [...] s pérdidas auditivas en población menor de 10 años entre 2009 y 2011, identificando las variaciones en las tasas según tipo de pérdida auditiva, uni o bilateralidad de la pérdida, edad y sexo. Materiales y métodos. El estudio, de tipo descriptivo y transversal, empleó los datos del Registro Individual de Procedimientos en Salud reportados al Ministerio de Salud en el período de observación y relacionados con las categorías diagnósticas de egreso de pérdida auditiva en la CIE-10. Resultados. El análisis identificó una tasa de pérdida auditiva de 4,3 casos por cada 1.000 en población menor de 10 años. La tasa de pérdidas neurosensoriales fue de 5,1 casos, 2,4 de conductivas y 1,2 de mixtas. Se identificó una tasa de 5,7 para pérdidas bilaterales y de 0,6 para unilaterales. Se presenta una tasa mayor en niños de 5 a 10 años con 2,4, que en niños de 0 a 4 años con 1,9. Conclusiones. La evidencia muestra una alta tasa de pérdidas auditivas en niños menores de 10 años. No se identifican diferencias significativas entre hombres y mujeres, observándose un comportamiento similar por sexo en pérdidas neurosensoriales y conductivas y siendo mayor la presencia de pérdidas mixtas en mujeres que en hombres. Abstract in english Background. According to the Colombia National Statistics Administration (2005) in Colombia it is estimated that 17.3% of the registered population has permanent hearing limitations, of which 24 547 are under 10. Objective. This study aimed to determine the national prevalence of hearing loss in the [...] population under 10 years of age between 2009 and 2011, identifying the variations in rates by type of hearing loss, unilateral or bilateral loss, age, and sex. Materials and methods. This descriptive, cross-sectional study, used data from the Individual Records of Health Procedures that was reported to the Colombian Ministry of Health during the period of observation and that was related to the diagnostic categories of hearing loss at discharge laid out in the ICD-10. Results. The analysis identified a hearing loss rate of 4.3 cases per 1,000 individuals under 10 years of age. The rate of sensorineural hearing loss cases was 5.1, 2.4 for conductive hearing loss and 1.2 for mixed hearing loss. Rates of 5.7 for bilateral hearing loss and 0.6 for unilateral losses were identified. A higher rate was found in children aged 5 to 10 years (2.4), than in children of 0-4 years of age (1.9). Conclusions. The evidence shows a high rate of hearing loss in children under 10 years of age. No significant differences between males and females are identified. Similar behavior was observed for both sexes in terms of sensorineural and conductive losses. However, there was a greater presence of mixed loss in females than in males.
BACKGROUND: Otitis media with effusion (OME) is common and may cause hearing loss with associated developmental delay. Treatment remains controversial. The effectiveness of both systemic and topical intranasal steroids in promoting the resolution of effusions has been assessed by randomised controlled trials. OBJECTIVES: To examine evidence for or against treating children with hearing loss associated with OME with systemic or topical intranasal steroids. SEARCH STRATEGY: Searches were conduc...
Thomas, CL; Simpson, S.; Butler, CC; Van Der Voort, JH
BACKGROUND: Otitis media with effusion (OME) is common and may cause hearing loss with associated developmental delay. Treatment remains controversial. OBJECTIVES: To examine evidence for or against treating children with hearing loss associated with OME with systemic or topical intranasal steroids. SEARCH STRATEGY: We searched the Cochrane Ear, Nose and Throat Disorders Group Specialised Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library Issue 4 20...
Simpson, SA; R. Lewis; van der Voort, J; Butler, CC
BACKGROUND: Otitis media with effusion (OME) is common and may cause hearing loss with associated developmental delay. Treatment remains controversial. OBJECTIVES: To examine the evidence for treating children with hearing loss associated with OME with systemic or topical intranasal steroids. SEARCH STRATEGY: We searched the Cochrane ENT Group Trials Register; CENTRAL; PubMed; EMBASE; CINAHL; Web of Science; BIOSIS Previews; Cambridge Scientific Abstracts; mRCT and additional sources for publ...
Melo, Antonio Antunes; Leão, Fernando Souza; Campos, Alexandre José Costa; Antunes, Maria do Rosário Távora de Arruda; Bunzen, Débora; Caldas Neto, Sílvio da Silva
Introduction: At the differentiated diagnosis of asymmetrical sensorineural hearing losses, vascular disorders are present, one of which is megadolicho basilar artery. This disease is generally asymptomatic, and when symptoms are found, they can be caused by a compression or ischemia. Clinically, sensorineural hearing loss, tinnitus, headache, facial hypoesthesia, trigeminal neuralgia, vertigo, diplopia and facial palsy, among others, are likely to occur. The image examination of choice for i...
Kaerlev, Linda; Jensen, Anker; Nielsen, Per Sabro; Olsen, Jorn; Hannerz, Harald; Tuchsen, Finn
Aims: Noise-induced hearing loss (NIHL) is a leading occupational disease and some seafarers and fishermen may be at high risk. We present here standardized hospital contact ratios (SHCRs) for hearing loss among Danish seafarers and fishermen. Materials and Methods: Cohorts of all Danish seafarers registered by the Danish Maritime Authority (DMA) and fishermen retrieved from a 1989-1998 pension registry were linked to the nationwide Occupational Hospitalisation Registry (OHR) with follow-up for ...
Toscano, Carla Fabiana da Silva; Silva, Polyanna Waleska Amorim da; Silva, Lícia Vasconcelos Carvalho da; Melo, Renato de Souza
Introduction: Posture is determined by the performance of the visual, somatosensory and vestibular systems. Children with hearing loss can present problems in their posture or postural control, enabling postural deviations and alterations to appear in their vertebral column, possibly provoked by a hypoactivity of the vestibular system as a result of deafness. Objective: To evaluate the posture of the vertebral column in children and teenagers with hearing loss at school age, taking into consi...
Jepsen, Morten Løve; Dau, Torsten
This study considered consequences of sensorineural hearing loss in ten listeners. The characterization of individual hearing loss was based on psychoacoustic data addressing audiometric pure-tone sensitivity, cochlear compression, frequency selectivity, temporal resolution, and intensity discrimination. In the experiments it was found that listeners with comparable audiograms can show very different results in the supra-threshold measures. In an attempt to account for the observed individual da...
Siemering, Kirby; Manji, Shehnaaz S. M.; Hutchison, Wendy M.; Du Sart, Desiree; Phelan, Dean; Dahl, Hans-Henrik M.
Knowing the etiology of hearing loss in a person has implications for counseling and management of the condition. More than 50% of cases of early onset, nonsyndromic sensorineural hearing loss are attributable to genetic factors. However, deafness is a genetically heterogeneous condition and it is therefore currently not economically and practically feasible to screen for mutations in all known deafness genes. We have developed a microarray-based hybridization biochip assay for the detection ...
Purpose: To determine the effect of cochlear dose on sensorineural hearing loss in pediatric patients with brain tumor treated by using conformal radiation therapy (CRT). Patients and Methods: We studied 78 pediatric patients (155 ears) with localized brain tumors treated in 1997-2001 who had not received platinum-based chemotherapy and were followed up for at least 48 months. They were evaluated prospectively by means of serial pure-tone audiograms (250 Hz-8 kHz) and/or auditory brainstem response before and every 6 months after CRT. Results: Hearing loss occurred in 14% (11 of 78) of patients and 11% (17 of 155) of cochleae, with onset most often at 3-5 years after CRT. The incidence of hearing loss was low for a cochlear mean dose of 30 Gy or less and increased at greater than 40-45 Gy. Risk was greater at high frequencies (6-8 kHz). In children who tested abnormal for hearing, average hearing thresholds increased from a less than 25 decibel (dB) hearing level (HL) at baseline to a mean of 46 ± 13 (SD) dB HL for high frequencies, 41 ± 7 dB HL for low frequencies, and 38 ± 6 dB HL for intermediate frequencies. Conclusions: Sensorineural hearing loss is a late effect of CRT. In the absence of other factors, including ototoxic chemotherapy, increase in cochlear dose correlates positively with hearing loss in pediatric patients with brain tumor. To minimize the risk of hearing loss for children treated with radiation therapy, a cumulative cochlear dose less than 35 Gy is recommended for patients planned to receive 54-59.4 Gy in 30-33 treatment fractions
Yang, Chao-Hui; Hwang, Chung-Feng; Lin, Pai-Mei; Chuang, Jiin-Haur; Hsu, Cheng-Ming; Lin, Sheng-Fung; Yang, Ming-Yu
The cause of sudden sensorineural hearing loss (SSNHL) remains unclear and therefore it is often considered as idiopathic. Sleep disturbance has been linked to SSNHL and circadian rhythm disruption, but the link between circadian rhythm disruption and SSNHL has never been investigated.In this study, we surveyed the sleep quality of 38 patients with SSNHL using a simple insomnia sleep questionnaire. The expression of circadian clock genes in peripheral blood (PB) leukocytes from 38 patients with SSNHL and 71 healthy subjects was accessed using real-time quantitative reverse transcriptase-polymerase chain reaction and validated using immunocytochemical staining.We found that 61.8% of patients with SSNHL suffered from insomnia before the insult of hearing loss. Besides, significantly decreased expression of PER1, CRY1, CRY2, CLOCK, BMAL1, and CKl? was found in PB leukocytes of patients with SSNHL when compared with healthy subjects. SSNHL patients with vertigo had significantly lower expression of CRY1 and CKl? than patients without vertigo symptoms. Our results imply the association of sleep disturbance and disrupted circadian rhythm in SSNHL. PMID:26131842
Khalid, Sameen; Qadir, Maqbool; Salat, Muhammad Sohail
Icterus neonatorum, or neonatal jaundice, is defined as a total serum bilirubin level above 5mg/dl. Acute bilirubin encephalopathy and kernicterus are known to be the two major complications associated with it, resulting in neurotoxic effects, including sensorineural hearing loss, hypotonia, delayed motor skills and intellectual deficits. We report two similar cases of neonatal jaundice requiring exchange transfusion that subsequently developed sensorineural hearing loss. Follow-up at the end of 1year revealed spontaneous recovery of hearing with normal speech. This report aims at increasing awareness of this condition among physicians to allow early detection of risk factors and prompt management and follow-up. PMID:26338755
Khan, Muhammad Riaz; Bashir, Rasheeda; Naz, Sadaf
Mutations in SLC26A4 cause either syndromic or nonsyndromic hearing loss. We identified a link between hearing loss and DFNB4 in 3 of the 50 families participating in this study. Sequencing analysis revealed two SLC26A4 mutations, p.V239D and p.S57X, in affected members of the 3 families. These mutations have been previously reported in deaf individuals from the subcontinent, all of whom manifested profound deafness. The patients investigated in our study exhibited moderate to severe hearing ...
Priscila Karla Santana, Pereira; Adriana de Souza, Martins; Márcia Ribeiro, Vieira; Marisa Frasson de, Azevedo.
Full Text Available TEMA: perda auditiva em neonatos. OBJETIVOS: verificar a prevalência de alterações auditivas em neonatos do Hospital São Paulo, observando se há correlação com as variáveis: peso de nascimento, idade gestacional, relação peso e idade gestacional e fatores de risco para deficiência auditiva. MÉTODO: [...] realizou-se uma análise retrospectiva dos prontuários de 1696 recém nascidos, sendo 648 nascidos pré-termo e 1048 a termo. Todas as crianças foram submetidas à avaliação audiológica constituída por pesquisa das emissões otoacústicas transientes e do reflexo cocleopalpebral e medidas de imitância acústica, estabelecendo-se o diagnóstico do tipo e grau de perda. RESULTADOS: a perda auditiva neurossensorial foi identificada em 0,82% das crianças nascidas a termo, e 3,1% das crianças pré-termo (com diferença estatisticamente significante). A perda auditiva condutiva foi a mais freqüente nas duas populações sendo observada em 14,6% das crianças nascidas a termo e 16,3% das crianças pré-termo. Houve suspeita de alterações do sistema auditivo central em 5,8% das crianças pré-termo e 3,3% das crianças a termo. Na população de crianças nascidas a termo, houve correlação significante entre falha na triagem auditiva e os riscos antecedente familiar e síndrome, sendo 37 vezes maior a chance de uma criança com síndrome falhar na triagem e sete vezes maior a chance de falhar na orelha direita quando esta tiver antecedente familiar de perda auditiva. Quanto menor a idade gestacional ( Abstract in english BACKGROUND: hearing loss in newborns. Aim: to verify the prevalence of auditory alterations in newborns of Hospital São Paulo (hospital), observing if there are any correlations with the following variables: birth weight, gestational age, relation weight/gestational age and risk factors for hearing [...] loss. METHOD: A retrospective analysis of the hospital records of 1696 newborns; 648 records of preterm infants and 1048 records of infants born at term. All of the infants had been submitted to an auditory evaluation consisting of: Transient Otoacoustic Emissions, investigation of the cochleal-palpebral reflexes and acoustic imittance tests, identifying the type and level of hearing loss. RESULTS: sensorineural hearing loss was identified in .82% of the infants who were born at term and in 3.1% of the preterm infants - with a statistically significant difference. Conductive hearing loss was the most frequent type of hearing loss in both groups, occurring in 14.6% of the term infants and in 16.3% of the preterm infants. Alteration of the central auditory system was considered as a possible diagnosis for 5.8% of the preterm infants and for 3.3% of the term infants. For the group of infants who were born at term, a significant correlation was observed between failure in the hearing screening test and the presence of risk factors such as family history and presence of a syndrome - the child who presented a syndrome had 37 times more chances of failing in the hearing screening test and seven times more chances of failing in the right ear when there was a family history for hearing loss. The lower the gestational age (
Rhee, Chung-Ku; Bahk, Chan Woong; Jung, Jae Yun; Ahn, Jin-Chul; Suh, Myung-Whan
Aim: To see the effect of LLLT on noise-induced hearing loss. Methods: Eleven rats were exposed to noise (120 dB, 16 kHz, 6 h) and left ears were irradiated at 60J/cm2, 830 nm laser for 12 days. Right ears were control. Hearing levels were measured at frequencies of 4, 8, 12, 16, 32 kHz before noise exposure and after 12th irradiations. Results: The initial hearing levels were 26.5+/-4.7, 24.5+/-5.0, 24.0+/-5.2, 24.0+/-3.2, 24.5+/-5.5 dB SPL. After noise exposure, thresholds were 63.5+/-15.1, 64+/-16.8, 71.5+/-11.3, 73.5+/-15.6, 67.5+/-14.4 dB SPL in 4, 8, 12, 16, 32 kHz. After 12th irradiation, thresholds of treated ears recovered significantly 21+/-4.2, 20+/-3.5, 24+/-11.9, 24+/-12.9, 21+/-2.2 dB SPL and that of the untreated right ears measured 36.3+/-22.9, 45+/-15.8, 66.3+/-22.9, 50+/-16.8, 43.8+/-21.4 dB SPL. Conclusion: LLLT may promote recovery of hearing after noiseinduced hearing loss.
Ramos Macías, Angel; Falcón González, Juan Carlos; Manrique, Manuel; Morera, Constantino; García-Ibáñez, Luis; Cenjor, Carlos; Coudert-Koall, Chrystellel; Killian, Matthijs
Tinnitus is an incapacitating condition commonly affecting cochlear implant (CI) candidates. The aim of this clinical study is to assess the long-term effects of CI treatment in patients with severe-to-profound, sensorineural, unilateral hearing loss (UHL) and incapacitating tinnitus. We performed a prospective Cochlear™ company-sponsored multicentre study in five Spanish centres. Sixteen patients with UHL and incapacitating tinnitus, which was indicated by a Tinnitus Handicap Inventory (THI) score >58%, received a Nucleus® CI in their deaf ear. The study design includes repeated within-subject measures on hearing, tinnitus, hyperacusis and quality of life up to 12 months after initial CI fitting. In addition to hearing loss and tinnitus, all patients suffered from hyperacusis. Most patients had a sudden hearing loss and received a CI within 2 years after their hearing loss. Preliminary 6-month, post-CI activation data of 13 subjects showed that the majority of patients perceived a subjective benefit from CI treatment, which was assessed using the THI, a Visual Analogue Scale of tinnitus loudness/annoyance and the Speech, Spatial and Qualities of Hearing Scale. Preliminary 12-month data of 7 subjects showed that most patients also perceived a degree of relief from their hyperacusis. One patient showed no improvements in any of the applied scales, which could be explained by partial insertion of the electrode due to obstruction of the cochlea by otosclerosis. In conclusion, CI can successfully be used in the treatment of UHL patients with accompanying severe tinnitus and hyperacusis. Implantation resulted in hearing benefits and a durable relief from tinnitus and hyperacusis in the majority of patients. These findings support the hypothesis that pathophysiological mechanisms after peripheral sensorineural hearing loss are at least partly reversible when hearing is restored with a CI. PMID:25997672
Kelly, Martins; Marília, Fontenele; Silva, Câmara; Edi Lúcia, Sartorato.
Full Text Available OBJETIVO: Este estudo teve como objetivo correlacionar prováveis fatores predisponentes para a perda auditiva sensorioneural em idosos, investigando as características audiológicas e a frequência de mutações em genes considerados responsáveis por perda auditiva não-sindrômica. MÉTODOS: Sessenta idos [...] os foram separados em dois grupos: Grupo de Caso, composto por 30 indivíduos, 21 do gênero feminino e nove do gênero masculino, com 60 anos ou mais, apresentando diagnóstico de perda auditiva sensorioneural, e o Grupo Controle, composto por 30 idosos pareados com o grupo experimental por idade e gênero, apresentando audição normal. Os pacientes foram submetidos à anamnese e audiometria tonal liminar nas frequências de 250, 500, 1000, 2000, 3000, 4000 e 6000 Hz. Amostras de sangue foram coletadas de cada paciente para análise de mutações em genes nucleares e mitocondriais relacionados à perda auditiva sensorioneural não sindrômica. RESULTADOS: Houve uma maior tendência à exposição a ruído e consumo de bebidas alcoólicas no Grupo de Caso. Os sintomas estatisticamente significativos entre os grupos foram zumbido e dificuldade para ouvir em diversas situações como: ambiente silencioso, telefone, televisão, localização sonora e na igreja. Todos os indivíduos do Grupo de Caso apresentaram perda auditiva sensorioneural bilateral. A simetria e progressão da deficiência auditiva também foram estatisticamente significativas entre os grupos. Não foram identificadas mutações genéticas. CONCLUSÃO: Os sintomas mais relatados foram zumbido e dificuldades de comunicação. As características audiológicas predominantes foram perda auditiva sensorioneural, bilateral, simétrica e progressiva. Não foi evidenciada relação entre perda auditiva sensorioneural em idosos e genes considerados responsáveis por perda auditiva não sindrômica, pois não foram encontradas mutações genéticas neste estudo. Abstract in english PURPOSE: This study aimed to correlate probable predisposing factors for sensorineural hearing loss in elderly by investigating the audiologic characteristics and frequency of mutations in genes considered responsible for non-syndromic hearing loss. METHODS: Sixty elderly patients were separated int [...] o two groups: the Case Group, composed of 30 individuals, 21 females and nine males, all 60 years old or older and presenting diagnoses of sensorineural hearing loss, and the Control Group, composed of 30 elderly individuals matched to the experimental group by age and gender, presenting normal hearing. The patients underwent anamnesis and pure tone audiometry in frequencies of 250, 500, 1000, 2000, 3000, 4000 and 6000 Hz. Blood samples were collected from each patient for analysis of mutations in nuclear and mitochondrial genes related to non-syndromic sensorineural hearing loss. RESULTS: It was observed a greater tendency to noise exposure and consumption of alcohol in the Case Group. The statistically significant symptoms between the groups were tinnitus and hearing difficulty in several situations as: silent environment, telephone, television, sound location and in church. All the individuals of Case Group presented sensorineural and bilateral hearing loss. The symmetry and progression of the hearing impairment were also statistically significant between the groups. No genetic mutations were identified. CONCLUSION: The most reported symptoms were communication difficulties and tinnitus. The predominant auditory characteristics included sensorineural, bilateral, progressive and symmetrical hearing loss. It was not evidenced a relationship between sensorineural hearing loss in elderly and genes considered responsible for non-syndromic hearing loss as no genetic mutation was found in this study.
The article describes a variation of Usher's Syndrome, a genetic condition characterized by visual and auditory impairments, in which moderate, postlingual, and sometimes progressive hearing impairments may go undetected. Identification guidelines are offered. (Author/CL)
Full Text Available Introduction: Inadequate intake of breast milk in the first days of life leads to weight loss in neonates. Jaundice is also more prominent in these infants. In this cross-sectional study, we tried to evaluate the extent of weight loss in term breastfed infants who were hospitalized for idiopathic hyperbilirubinemia. Methods: This prospective study involved 1072 infants >48 hours old, who were admitted to Ghaem hospital of Mashhad with idiopathic hyperbilirubinemia, between may 2007 - 2013. Infants were divided into two groups based on the amount of weight loss. Case groups (> 7% weight loss and control (weight loss ? 7%. The profile of maternal and neonatal risk factors were compared between them. Main outcome measure: to find out if there is any relation between significant neonatal weight loss and idiopathic hyperbilirubinemia. Results: Average birth weight, gestational age, mode of delivery, maternal age, duration of mother's stay at hospital did not show any significant difference between two groups. (P>0.05.Age at presentation, weight on admission , extent of weight loss, percentage of daily weight loss, duration of neonatal hospitalization , age at onset of hyperbilirubinemia , serum bilirubin and hematocrit levels were significantly different between two groups ( p 20 mg/dl was three times that of moderate hyperbilirubinemia (< 20 mg/dl.
Purpose: To investigate the risk of sensorineural hearing loss (SNHL) in patients with head-and-neck cancer and treated with radiation therapy (RT) or concomitant cisplatin-based chemoradiation, the relationship among SNHL and radiation dose to the cochlea, the use of two common cisplatin dose regimens. Methods and Materials: A total of 62 head-and-neck cancer patients treated with curative intent were included in this prospective study. Of the patients, 21 received RT alone, 27 received 40 mg/m2 weekly cisplatin, 13 received 100 mg/m2 every 3 weeks during RT, and 1 received RT with weekly epidermal growth factor receptor inhibitor antibody. The effect of chemotherapy and RT dose on hearing was determined using a model that accounted for the age and variability between each ear for each patient. Results: We constructed a model to predict dose-dependent hearing loss for RT or cisplatin-based chemotherapy either alone or in combination. For patients only receiving RT, no significant hearing loss was found at doses to the cochlea of less than 40 Gy. Patients receiving 100 mg/m2 or 40 mg/m2 of cisplatin chemotherapy had an estimated +21.5 dB and +9.5 dB hearing loss at 8,000 Hz with low radiation doses (10 Gy), which rose to +38.4 dB and +18.9 dB for high radiation doses (40 Gy). Conclusions: Use of RT alone with doses of less than 40 Gy did not result in clinically significant hearing loss. High-frequency SNHL was profoundly damaged in patients who received concomitant cisplatin when doses of 100 mg/m2 were used. The threshold cochlear dose for hearing loss with cisplatin-based chemotherapy and RT was predicted to be 10 Gy. The inner ear radiation dose constraints and cisplatin dose intensity should be considered in the treatment of advanced head-and-neck cancer
Adriana Betes, Heupa; Claudia Giglio de Oliveira, Gonçalves; Evelyn Joice, Albizu; Milena Raquel, Iantas; Adriana Bender Moreira de, Lacerda; Diolen Conceição Barros, Lobato.
Full Text Available OBJETIVO: caracterizar o perfil de pescadores participantes de uma ação educativa desenvolvida como parte do Programa de Prevenção de Perdas Auditivas. MÉTODO: estudo seccional realizado com 52 pescadores industriais. Realizou-se ações educativas abordando temas pertinentes à audição, como funcionam [...] ento e cuidados. Após a ação, os participantes responderam a um questionário com questões referentes aos conceitos empregados na palestra e às queixas apresentadas, a seguir fizeram o exame de audiometria. RESULTADOS: a idade dos pescadores variou de 24 a 65 anos (média de 42,8 anos). 61,53% das audiometrias estavam alteradas, sendo que 96,8% dos pescadores com alterações auditivas tinham mais de 40 anos. No questionário respondido, 78,84% dos pescadores consideram que o ruído das embarcações é de forte intensidade; 17,31% referiam dificuldades auditivas; 30,77% com dificuldades em compreender fala e 46,15% com zumbido. 76,92% responderam que além da perda auditiva, o zumbido é um dos efeitos relacionados à exposição ao ruído. Todos estes resultados indicam a necessidade de intervenção preventiva individual e coletiva nesta população. O índice de perdas auditivas é um número que chama a atenção, porém, poucos sentem dificuldades auditivas. A ação educativa realizada foi o primeiro passo para a conscientização destes trabalhadores em relação à prevenção dos prejuízos que a exposição ao ruído pode causar à saúde. CONCLUSÕES: houve dependência significante entre o perfil auditivo e a idade dos pescadores, ou seja, a ocorrência de alterações auditivas é significativamente maior a partir de 40 anos de idade. Assim, os pescadores que apresentavam mais de 40 anos de idade tem 18,05 vezes mais alterações auditivas do que os com menos de 40 anos. Abstract in english PURPOSE: to characterize fishermen's profile, participating in an educational program developed as part of the Prevention of Hearing Loss. METHOD: a cross-sectional study conducted with 52 fishing industry. We carried out educational activities on topics relevant to hearing, such as, operation and c [...] are. After the program, the participants answered a questionnaire on the concepts used in the lecture and the presented complaints, and then they passed through the audiometric exam. RESULTS: the age of the participants varied from 24 to 65 year old (average 42.8 year old). 61.53% of audiometry exams were altered and 96.8% of fishermen with hearing loss were more than 40 year old. Answering the questionnaire: 78.84% of the fishermen feel the noise of boats is very intense, 17.31% reported hearing difficulties; 30.77% with difficulty to understanding speech and 46.15% with tinnitus. 76.92% answered that along with hearing loss, tinnitus is one of the effects related to exposure to noise. All these findings indicate the need for individual and collective preventive intervention in this population. The rate of hearing loss is a number that draws attention; however, few have hearing difficulty. The performed educational program was the first step to awareness of these workers regarding prevention of the damage that exposure to noise may come to cause to health. CONCLUSIONS: there was significant dependence between the auditory and age of the fishermen, in other words, the occurrence of hearing loss is significantly greater from 40 year old. Thus, the fishermen who were more than 40 year old had 18.05 times more hearing loss than those who are less than 40 year old.
Drift, J.F.C. van der
The earlier hearing disorders are diagnosed in infants and children the sooner treatment and revalidation can be organised. Consequently. determining the hearing at the youngest age possible is important to promote the development of language and communication. Brainstern response audiometry has the special advantage of being an objective method. Cooperation of the patient is not required so it can be applied even in the young children. It is the aim of the present study to ...
M.P. Paulraj; Subramaniam, Kamalraj; Yaccob, Sazali Bin; Adom, Abdul H. Bin; Hema, C. R
Hypoacusis is the most prevalent sensory disability in the world and consequently, it can lead to impede speech in human beings. One best approach to tackle this issue is to conduct early and effective hearing screening test using Electroencephalogram (EEG). EEG based hearing threshold level determination is most suitable for persons who lack verbal communication and behavioral response to sound stimulation. Auditory evoked potential (AEP) is a type of EEG signal emanated from the brain scalp...
Hall, Amanda J.; Maw, Richard; Midgley, Elizabeth; Golding, Jean; Steer, Colin
Background Glue ear or otitis media with effusion (OME) is common in children and may be associated with hearing loss (HL). For most children it has no long lasting effects on cognitive development but it is unclear whether there are subgroups at higher risk of sequelae. Objectives To examine the association between a score comprising the number of times a child had OME and HL (OME/HL score) in the first four/five years of life and IQ at age 4 and 8. To examine whether any association between OME/HL and IQ is moderated by socioeconomic, child or family factors. Methods Prospective, longitudinal cohort study: the Avon Longitudinal Study of Parents and Children (ALSPAC). 1155 children tested using tympanometry on up to nine occasions and hearing for speech (word recognition) on up to three occasions between age 8 months and 5 years. An OME/HL score was created and associations with IQ at ages 4 and 8 were examined. Potential moderators included a measure of the child’s cognitive stimulation at home (HOME score). Results For the whole sample at age 4 the group with the highest 10% OME/HL scores had performance IQ 5 points lower [95% CI ?9, ?1] and verbal IQ 6 points lower [95% CI ?10, ?3] than the unaffected group. By age 8 the evidence for group differences was weak. There were significant interactions between OME/HL and the HOME score: those with high OME/HL scores and low 18 month HOME scores had lower IQ at age 4 and 8 than those with high OME/HL scores and high HOME scores. Adjusted mean differences ranged from 5 to 8 IQ points at age 4 and 8. Conclusions The cognitive development of children from homes with lower levels of cognitive stimulation is susceptible to the effects of glue ear and hearing loss. PMID:24498289
Full text: One of the most challenging roles of a Certifying Surgeon is to act as catalyst for change. This paper is a presentation of the impact of such an effort. Noise is the insidious of all industrial pollutants, involving every industry and causing severe hearing loss. Exposure to excessive noise is the major avoidable cause of permanent hearing impairment. Noise - induced hearing loss (NIHL) is bilateral and symmetrical, usually affecting the higher frequencies 3 k, 4 k or 6 kHz ) and then spreading to the lower frequencies (0.5 k,1 k or 2 kHz). The major health effects are lack of concentration, irritation, fatigue, headache, sleep disturbances etc. Hearing protectors should be used when engineering controls and work practices are not feasible for reducing noise exposure to safe levels. Ear muffs, ear plugs and ear canal caps are the main types of hearing protectors. Awareness should be created among workers about the harmful effects of noise on hearing and other body systems by implementing compulsory education noise conservation programmes. The practice followed at RAPS Hospital for medical surveillance of Occupational Noise Induced Hearing Loss is being briefed
Christiane, Schultz; Maria Valéria Schmidt, Goffi-Gomez; Patrícia Helena Pecora, Liberman; André Lopes, Carvalho.
Full Text Available A cisplatina é um antineoplásico muito utilizado no tratamento de diferentes neoplasias, porém quando utilizada em doses acima de 360mg/m² pode causar ototoxicidade. Esta produz lesões cocleares que resultam em perda auditiva. Existem critérios que visam identificar e quantificar as perdas auditivas [...] . OBJETIVO: Descrever as características das classificações e identificar implicações e aplicações de cada uma, dentro das necessidades do acompanhamento ao paciente oncológico. MATERIAL E MÉTODO: Avaliamos 31 pacientes pré e pós-tratamento quimioterápico. Classificamos as perdas auditivas de acordo com os critérios e verificamos a sensibilidade e especificidade de cada um. RESULTADO: Houve grande variabilidade na detecção das alterações auditivas (de 29% a 61%). Somente 4 dos 31 indivíduos com alterações auditivas no exame pós-tratamento foram identificados por todos os critérios. Por vezes o indivíduo portador de perda auditiva era classificado com normal por algum critério. Dos 31 indivíduos, 18 apresentaram PTA normal no exame pós-tratamento. CONCLUSÃO: Nenhum dos critérios considera a queixa do paciente. Os critérios descritos mostraram inadequações para descrever as alterações auditivas encontradas, fazendo-se necessária a descrição de informações adicionais, para que o médico compreendesse a natureza da perda auditiva. É importante o refinamento desses instrumentos para melhor compreensão e tratamento dos pacientes oncológicos, assim como de sua qualidade de vida. Abstract in english Cisplatin is used frequently as an antineoplastic drug in the treatment of many different cancers. However, when used in doses over 360mg/m², ototoxicity may ensue, resulting in loss of hearing. Criteria for identifying and quantifying hearing loss have been devised. AIM: To describe the features of [...] different hearing loss classification systems and to identify their implications and use in oncologic patients. METHOD: Hearing loss was classified in 31 patients before and after chemotherapy, according to different criteria, assessing the sensitivity and specificity of each classification system. RESULTS: Hearing loss results were highly variable (ranging from 29% to 61%). Only 4 of 31 subjects with post-therapy hearing loss were identified by all the methods. A few subjects with hearing loss were classified as normal hearing in some of the criteria. A normal PTA was found in 18 of 31 subjects in the post-treatment evaluation. CONCLUSION: None of the criteria assesses the complaints of patients. The criteria described in this study were inadequate to identify hearing loss following chemotherapy, requiring additional information for physicians to better understand the hearing losses and their implications for the quality of life of patients.
De-Villegas Carlos A
Full Text Available Abstract Background Weight loss of greater than 7% from birth weight indicates possible feeding problems. Inadequate oral intake causes weight loss and increases the bilirubin enterohepatic circulation. The objective of this study was to describe the association between total serum bilirubin (TSB levels and weight loss in healthy term infants readmitted for hyperbilirubinemia after birth hospitalization. Methods We reviewed medical records of breastfed term infants who received phototherapy according to TSB levels readmitted to Caja Petrolera de Salud Clinic in La Paz, Bolivia during January 2005 through October 2008. Results Seventy-nine infants were studied (64.6% were males. The hyperbilirubinemia readmission rate was 5% among breastfed infants. Term infants were readmitted at a median age of 4 days. Mean TSB level was 18.6 ± 3 mg/dL. Thirty (38% had significant weight loss. A weak correlation between TSB levels and percent of weight loss was identified (r = 0.20; p 20 mg/dL was notably higher among infants with significant weight loss (46.7% vs. 18.4%; p Conclusions Significant weight loss could be a useful parameter to identify breastfed term infants at risk of severe hyperbilirubinemia either during birth hospitalization or outpatient follow-up visits in settings where routine pre-discharge TSB levels have not been implemented yet.
Hiteshree C Patel, Mohua Moitra, Anjali Modi, Jaymin Contractor, S L Kantharia
Full Text Available Background: “Hearing”- one of the five special senses with which a human is gifted. At times, due to variety of reasons, this sense is impaired. Hearing impairment of any degree has a profound effect on children. It delays development of speech, slows educational progress and leads to being stigmatized. Objectives: To document the impact of hearing loss in daily life style and schooling of children between 5 and 15 years age-group. Materials & methods: This was cross- sectional study done in Children between 5 and 15 years age-group with hearing loss, coming to an ENT OPD, New Civil Hospital, Surat during the period of 1st August 2011 to 31 July 2012. Results: A total of 246 children were studied. Mean age of the study population was 9±3.46 years. Most common impactin life of children with hearing loss was that “they were not admitted to school by their parents” (31.3%. Among them, 84.4% had congenital deafness and 15.6% had acquired deafness. This difference was statistically significant. (p= 0.002, x2= 8.63. As per parents’ perception, academic performance of the children was significantly associated with type of school (normal Vs deaf & mute school” (p< 0.001. Conclusion: Most common impact was that “children being not admitted to school” and “children were lagging behind in studies”. Among the congenitally deaf children, the quality of life was significantly better in those who attended these special schools (p<0.001.
The diversity of chemical and drugs that can potentiate noise-induced hearing loss (NIHL) has impeded efforts to predict such interactions. We have hypothesized that chemical contaminants that disrupt intrinsic antioxidant defenses hold significant risk for potentiating NIHL. If this is true, then acrylonitrile (ACN) would be expected to potentiate NIHL. ACN, one of the 50 most commonly used chemicals in the United States, is metabolized via two pathways that are likely to disrupt intrinsic reactive oxygen species (ROS) buffering systems: (1) it conjugates glutathione, depleting this important antioxidant rapidly; (2) a second pathway involves the formation of cyanide, which can inhibit superoxide dismutase. We hypothesized that moderate noise exposure, that does not produce permanent hearing loss by itself, could initiate oxidative stress and that ACN could render the inner ear more sensitive to noise by disrupting intrinsic antioxidant defenses. Temporary and persistent effects of ACN alone (50 mg/kg, sc 5 days), noise alone (95 or 97 dB octave band noise, 4 h/day for 5 days), or ACN in combination with noise were determined using distortion product otoacoustic emissions (DPOAEs) and compound action potential (CAP) amplitudes. Histopathological damage to hair cells resulting from these treatments was also investigated using surface preparations of the organ of Corti. Individually, neither ACN nor noise exposures caused any permanent hearing or hair cell loss; only a reversible temporary threshold shift was measured in noise-exposed animals. However, when given in combination, ACN and noise induced permanent threshold shifts (13-16 dB between 7 and 40 kHz) and a decrease in DPOAE amplitudes (up to 25 dB at 19 kHz), as well as significant outer hair cell (OHC) loss (up to 20% in the first row between 13 and 47 kHz). This investigation demonstrates that ACN can potentiate NIHL at noise levels that are realistic in terms of human exposure, and that the OHCs are the main target of toxicity. While the exact mechanism is unknown, the results are consistent with the hypothesis of ROS involvement in NIHL at moderate levels
Victor Hygor Veríssimo Farias
Full Text Available OBJETIVO: investigar a ocorrência de perda auditiva induzida pelo ruído (PAIR em carpinteiros, caracterizando a perda auditiva por faixa etária, tempo de exposição total ao ruído e uso regular de protetores auditivos durante o tempo total de exposição. MÉTODO: estudo retrospectivo, descritivo, em uma população de 80 carpinteiros da construção civil, atendidos em uma clínica particular. Foram analisados 60 trabalhadores, conforme dados obtidos na anamnese e ficha do exame audiométrico. RESULTADOS: 49% dos trabalhadores apresentaram audição normal, sendo 58% com limiares auditivos normais bilateralmente e 35% com entalhe audiométrico em 3 kHz, 4 kHz e/ou 6 kHz. 44% apresentaram perfil audiométrico sugestivo de PAIR, destes 74% foram classificados como PAIR bilateral e 19% como PAIR unilateral. Houve diferença estatística significante entre os grupo PAIR e Normal em relação às variáveis idade (p=0,001, assim como o tempo total de exposição ao ruído ocupacional (p=0,002. CONCLUSÃO: quanto maior a idade e o tempo de profissão como carpinteiro, maior é a sua alteração auditiva, principalmente, devido à exposição ao ruído elevado durante a jornada de trabalho, sendo também constatado que as medidas de controle pelo uso do protetor são insuficientes para prevenir perdas auditivas. Portanto, sugerem-se medidas preventivas em saúde auditiva ativamente nessa população estudada, no ramo da construção civil.PURPOSE: to investigate the occurrence of noise induced hearing loss in carpenters, characterizing the hearing loss for age group, time of total exposure to noise and regular use of hearing protectors during the total exposure time. METHOD: retrospective and descriptive study in a population of 80 construction carpenters, attended at a private clinic. 60 workers were analyzed, as data on medical history and record of audiometric testing. RESULTS: 49% of the workers shoed normal hearing, being 58% with normal bilaterally hearing thresholds and 35% with audiometric notch in 3 kHz, 4 kHz and/or 6 kHz. 44% showed suggestive audiometric profile of NIHL, of these 74% were classified as bilateral NIHL and 19% as unilateral NIHL. There were significant differences between the NIHL group and normal to the age variables (p=0.001, as well as the total time of exposure to occupational noise (p=0,002. CONCLUSION: the greater the age and length of employment as a carpenter were, the greater their hearing loss, mainly due to exposure to loud noise during the working day, and we also noted that measures taken in order to control the use of the auricular protector are insufficient to prevent hearing loss. Therefore, we suggest active preventive measures in hearing health in this studied population, in the field of civil construction.
Zaidman-Zait, Anat; Most, Tova; Tarrasch, Ricardo; Haddad-Eid, Eliana; Brand, Devora
Parenting children who are deaf or hard of hearing (D/HH) presents unique long-term challenges that can place the parents at a greater risk for elevated levels of parenting stress. Adaptation of families to the various challenges presented by childhood hearing loss is influenced by their personal and social coping resources available for managing these stressors and challenges. The current study examined differences in parenting stress and personal (i.e., acceptance of the child who is D/HH and parents' sense of parenting self-efficacy) and social (i.e., formal and informal social support) coping resources between mothers and fathers of children who are D/HH in the Arab sector in Israel. Further, the study examined the relations between coping resources and parenting stress among these parents. Participants included 30 Israeli Arab mother-father couples (n = 60) having a child who is D/HH aged 3-8 years. Findings revealed no significant differences between mothers and fathers regarding parenting stress, child acceptance, or parental support systems. However, mothers reported significantly higher self-efficacy. In addition, correlation analysis indicated that higher coping resources decreased parenting stress levels. Theoretical and practical implications of parental gender in the context of cultural background are discussed regarding parent intervention programs. PMID:26363022
Ramnarayan Ramachandran; Mackenzie Ian
Context: The importance of brainstem auditory evoked potential monitoring in reducing hearing loss during microvascular decompression for trigeminal neuralgia is now accepted. However the extent of the changes in the pattern of these potentials and the safe limits to which these changes are relevant in reducing postoperative hearing loss have not been established. Aims: The aim of this study is to quantify these changes and relate these to the postoperative hearing loss. Settings and Desi...
Szczepek, Agnieszka J; Heidi Olze; Heidemarie Haupt; Birgit Mazurek
Tinnitus disturbs lives and negatively affects the quality of life of about 2% of the adult world population. Research has shown that the main cause of tinnitus is hearing loss. To analyze a possible association of the degree of hearing loss with the severity of tinnitus, we have performed a retrospective study using admission data on 531 patients suffering from chronic tinnitus. We have found that 83% of our tinnitus patients had a high frequency hearing loss corresponding to a noise-induced...
Audiometric monitoring is an important element in hearing conservation programs. Nearly every existing hearing conservation standard dictate that hearing thresholds should be measured at specific frequencies, and that 500 Hz be among those frequencies tested. Actual and estimated noise-induced permanent threshold shifts were evaluated as a function of exposure duration and exposure level. The results demonstrate 500 Hz to be of little value in assessing noise-induced hearing loss for typical industrial noise exposures of up to 40 years, at least for time-weighted average exposures of up to 100 dBA. Furthermore, few hearing conservation programs currently require audiometric monitoring to be performed in an environment that meets ANSI standards for maximum permissible background noise levels. This is particularly likely to compromise hearing testing at 500 Hz. As a result, this paper argues against the need for testing at 500 Hz, and recommends it be eliminated as a required test frequency in audiometric monitoring for noise-induced occupational hearing loss.
Stewart, Raj; Wingfield, Arthur
Older adults with good hearing and an age-matched group with mild to moderate hearing loss heard monosyllabic words in isolation and nine-word sentences that varied in their syntactic complexity. Each of the these stimulus types was presented initially below the level of audibility and then increased in loudness in 2 dB increments until the single-word stimuli and all nine words of the sentence stimuli could be correctly reported. A group of young adults with age-normal hearing were also test...
Scheidt, Ryan E.; Kale, Sushrut; Heinz, Michael G.
Auditory-nerve fibers demonstrate dynamic response properties in that they adapt to rapid changes in sound level, both at the onset and offset of a sound. These dynamic response properties affect temporal coding of stimulus modulations that are perceptually relevant for many sounds such as speech and music. Temporal dynamics have been well characterized in auditory-nerve fibers from normal-hearing animals, but little is known about the effects of sensorineural hearing loss on these dynamics. ...
DesJardin, Jean L.; Doll, Emily R.; Stika, Carren J.; Eisenberg, Laurie S.; Johnson, Karen J.; Ganguly, Dianne Hammes; Colson, Bethany G.; Henning, Shirley C.
Parent and child joint book reading (JBR) characteristics and parent facilitative language techniques (FLTs) were investigated in two groups of parents and their young children; children with normal hearing (NH; n = 60) and children with hearing loss (HL; n = 45). Parent–child dyads were videotaped during JBR interactions, and parent and child behaviors were coded for specific JBR behaviors using a scale developed for this study. Children’s oral language skills were assessed using the Prescho...
Noise is an environmental health problem that has not received sufficient attention. Physicians should become knowledgeable about the medical consequences of excessive noise, support legislation to reduce the problem and promote programs aimed at noise control and prevention of hearing loss. Questions about noise and hearing should be incorporated into the medical history, and pure-tone audiometry should be a part of periodic physical evaluations.
Kopun, Judy G.; And Others
This study examined the attenuation characteristics of 5 Frequency Modulation system sound delivery options for 25 adults and children (ages 5-13). Degree of ear canal occlusion was a major factor in degree of attenuation. For children with unilateral hearing impairments, the most acoustically appropriate option was the tube-fitting. (Author/JDD)
Hendershot, Candace; Pakulski, Lori A; Thompson, Amy; Dowling, Jamie; Price, James H
Young people are likely to experience noise-induced hearing loss (NIHL), as the use of personal listening devices and other damaging factors (e.g., video games) increases. Little research has examined the role of school health personnel in the prevention and early identification of hearing impairment. A 32-item, valid and reliable survey was developed regarding elementary and middle school nurses' practices concerning hearing loss screening and prevention. The survey instrument was based on the Stages of Change theory and the Health Belief Model. A random sample of 800 nurses was obtained from The National Association of School Nurses. A two-wave mailing was used to achieve a 58% response rate. Forty eight percent indicated there were not many educational programs that addressed NIHL in students. Performing hearing screenings routinely can help identify those students at risk. School nurses need to become advocates for policies and programs that mandate hearing screenings and educational programs to help reduce hearing loss. PMID:21653756
Ronnberg, Jerker; Danielsson, Henrik; Rudner, Mary; Arlinger, Stig; Sternang, Ola; Wahlin, Ake; Nilsson, Lars-Goran
Purpose: To test the relationship between degree of hearing loss and different memory systems in hearing aid users. Method: Structural equation modeling (SEM) was used to study the relationship between auditory and visual acuity and different cognitive and memory functions in an age-hetereogenous subsample of 160 hearing aid users without…
Trevisani Virgínia FM
Full Text Available Abstract Background Music is ever present in our daily lives, establishing a link between humans and the arts through the senses and pleasure. Sound technicians are the link between musicians and audiences or consumers. Recently, general concern has arisen regarding occurrences of hearing loss induced by noise from excessively amplified sound-producing activities within leisure and professional environments. Sound technicians' activities expose them to the risk of hearing loss, and consequently put at risk their quality of life, the quality of the musical product and consumers' hearing. The aim of this study was to measure the prevalence of high frequency hearing loss consistent with noise exposure among sound technicians in Brazil and compare this with a control group without occupational noise exposure. Methods This was a cross-sectional study comparing 177 participants in two groups: 82 sound technicians and 95 controls (non-sound technicians. A questionnaire on music listening habits and associated complaints was applied, and data were gathered regarding the professionals' numbers of working hours per day and both groups' hearing complaint and presence of tinnitus. The participants' ear canals were visually inspected using an otoscope. Hearing assessments were performed (tonal and speech audiometry using a portable digital AD 229 E audiometer funded by FAPESP. Results There was no statistically significant difference between the sound technicians and controls regarding age and gender. Thus, the study sample was homogenous and would be unlikely to lead to bias in the results. A statistically significant difference in hearing loss was observed between the groups: 50% among the sound technicians and 10.5% among the controls. The difference could be addressed to high sound levels. Conclusion The sound technicians presented a higher prevalence of high frequency hearing loss consistent with noise exposure than did the general population, although the possibility of residual confounding due to unmeasured factors such as socioeconomic status cannot be ruled out.
Kelly Cristina Lira de Andrade
Full Text Available OBJECTIVE: The audibility thresholds for the sound frequency of 137 upward- and downward-sloping audiograms showing sensorineural hearing loss were selected and analyzed in conjunction with speech recognition thresholds obtained from individuals seen at a public otolaryngology clinic to determine which frequencies in slope audiograms best represent speech recognition thresholds. METHOD: The linear regression model and mean square error were used to determine the associations between the threshold values. RESULT: The mean square error identified larger errors when using thresholds of 500, 1000, and 2000 Hz than when using audibility thresholds of 500, 1000, 2000, and 4000 Hz. The linear regression model showed a higher correlation (91% between the audiogram thresholds for frequencies of 500, 1000, 2000, and 4000 Hz than for the frequencies of 500, 1000, and 2000 Hz (88%. CONCLUSION: Frequencies of 500, 1000, 2000, and 4000 Hz were the most significant in predicting the speech recognition threshold.
Kelly Cristina Lira de, Andrade; Pedro de Lemos, Menezes; Aline Tenório Lins, Carnaúba; Renato Glauco de Sousa, Rodrigues; Mariana de Carvalho, Leal; Liliane Desgualdo, Pereira.
Full Text Available OBJECTIVE: The audibility thresholds for the sound frequency of 137 upward- and downward-sloping audiograms showing sensorineural hearing loss were selected and analyzed in conjunction with speech recognition thresholds obtained from individuals seen at a public otolaryngology clinic to d [...] etermine which frequencies in slope audiograms best represent speech recognition thresholds. METHOD: The linear regression model and mean square error were used to determine the associations between the threshold values. RESULT: The mean square error identified larger errors when using thresholds of 500, 1000, and 2000 Hz than when using audibility thresholds of 500, 1000, 2000, and 4000 Hz. The linear regression model showed a higher correlation (91%) between the audiogram thresholds for frequencies of 500, 1000, 2000, and 4000 Hz than for the frequencies of 500, 1000, and 2000 Hz (88%). CONCLUSION: Frequencies of 500, 1000, 2000, and 4000 Hz were the most significant in predicting the speech recognition threshold.
Ana Cláudia Mirândola Barbosa, Reis; Maria Cecília Martinelli, Iório.
Full Text Available TEMA: as avaliações comportamentais e eletrofisiológicas contribuem para o entendimento do sistema auditivo e do processo de intervenção. OBJETIVO: estudar P300 em sujeitos com perda auditiva neurossensorial congênita, segundo as variáveis gênero, idade e grau da perda auditiva. MÉTODO: a presente i [...] nvestigação consiste em um estudo descritivo, transversal. Foram examinados 29 sujeitos, sendo 15 do gênero masculino e 14 do gênero feminino, com idade entre 11 a 42 anos. Os critérios de elegibilidade para composição da amostra foram: idade superior a 11 anos e inferior a 45 anos; ser portador de deficiência auditiva congênita severa ou profunda; não apresentar outro tipo de distúrbio; não apresentar perda auditiva central e/ou comprometimento condutivo. A primeira etapa caracterizou-se por avaliação comportamental auditiva e fisiológica que incluiu: audiometria tonal limiar (via aérea e via óssea), logoaudiometria - LDV e medidas do ganho funcional para os sujeitos que faziam uso de próteses auditivas, Imitanciometria: curva timpanométrica e pesquisa dos reflexos ipsi e contra-laterais, registro das emissões otoacústicas (EOA) - emissões otoacústicas transitórias (EOAT) e emissões otoacústicas por produto de distorção (EOAPD). A avaliação eletrofisiológica constituiu a quarta etapa do procedimento de coleta de dados e incluiu: potenciais auditivos evocados de tronco encefálico (PEATE) e de longa latência (P300). RESULTADOS: o P300 foi registrado em 17 sujeitos, com latência e amplitude média de 326,97ms e 3,76V, respectivamente. Apresentou diferenças significantes da latência em relação à idade (p Abstract in english BACKGROUND: behavioral and electrophysiological evaluations contribute to the understanding of the hearing system and to the intervention process. AIM: to investigate the occurrence of P300 in subjects with congenital severe to profound hearing loss, according to the variables of gender, age and hea [...] ring loss level. METHOD: the design of this research is a descriptive transversal study. Twenty-nine subjects, 15 male and 14 female, ranging in age from 11 to 42 years, were evaluated. Inclusion criteria were: to have at least 11 years of age and no more than 45 years; to have the diagnosis of congenital severe to profound sensorineural hearing loss; to have no other disorder; and absence of central hearing loss or any other auditory conductive disorder. The first stage consisted of an auditory behavioral and physiological evaluation, including: pure tone audiometry (air and bone conduction measures), speech audiometry, SDT (Speech Detection Threshold) and functional gain measures for the subjects using hearing aids, and immittance measures - tympanometry and acoustic reflexes thresholds; transient evoked otoacoustic emissions (TEOAE); distortion product otoacoustic emissions (DPOAE). The electrophysiological evaluation was the fourth stage of the study and included: auditory brainstem response (ABR) and late latency response (P300). RESULTS: P300 was obtained for 17 out of the 29 subjects. Mean latency and amplitude were 326.97 ms and 3.76 V, respectively. A statistical significant difference was observed for latency when considering the variable age (electrode CzA2 p
Rubak, Tine; ThrysØe, Samuel Alberg
The causal association between occupational noise exposure and permanent hearing loss is well-documented and well-founded primary preventive approaches have been developed. However, documentation of the impact on the present prevalence of noise-induced hearing loss in the working population is limited. This study reports on the prevalence of noise-induced hearing loss in a population sample of 788 workers from 11 trades with expected high noise exposure levels and a reference group examined according to the same protocol. Full-shift A-weighted equivalent sound levels were recorded and pure tone audiometric examinations were conducted at the work sites in soundproof booths. Data were analyzed with multivariate regression techniques and adjusted for age, sex, ear disease, smoking and environmental noise exposure. An overall two-fold increased risk of hearing handicap (hearing threshold above 20 dB averaged across 2, 3 and 4 kHz for either ear) was observed in the noise exposed workers [odds ratio (OR) 1.99, 95%confidence interval (CI) 0.91-4.34]. Workers exposed for more than 20 years to an exposure level above 85 dB(A) had a three-fold increased risk (OR 3.05, 95% CI 1.33-6.99). Workers starting in noisy work during the last 10-15 years or workers below 30 years of age showed no increased risk of hearing handicap. This indicates that preventive measures enforced during the past 10-15 years to reduce noise exposure may have borne fruit. Systematic surveillance of noise and hearing levels in appropriate populations should still be included in an efficient hearing conservation program.
Noben-Trauth, Konrad; Latoche, Joseph R.; Neely, Harold R.; Bennett, Beth
Progressive sensorineural hearing loss is the most common form of acquired hearing impairment in the human population. It is also highly prevalent in inbred strains of mice, providing an experimental avenue to systematically map genetic risk factors and to dissect the molecular pathways that orchestrate hearing in peripheral sensory hair cells. Therefore, we ascertained hearing function in the inbred long sleep (ILS) and inbred short sleep (ISS) strains. Using auditory-evoked brain stem respo...
Music students are not being taught that music is a sound source capable of harming hearing. Ensemble directors of public school and college bands, orchestras, and choirs, are unaware and unprepared to recognize and manage risk from excessive sound exposures. Schools of music and conservatories around the world, and the organizations that accredit them, need to embrace the idea that schools of music are best suited to facilitate change, conduct research, create and impart knowledge, institute competency, and most importantly, cultivate a culture of responsibility and accountability throughout the music discipline. By drawing attention to actions pursued at and through the College of Music at the University of North Texas, the purpose of this paper is to encourage change and to assist others in efforts to reach the best conditions for preventing irreversible hearing disorders associated with music. PMID:21288066
Yawn, Robert; Hunter, Jacob B.; Sweeney, Alex D.; Bennett, Marc L
Cochlear implants are a medical prosthesis used to treat sensorineural deafness, and one of the greatest advances in modern medicine. The following article is an overview of cochlear implant technology. The history of cochlear implantation and the development of modern implant technology will be discussed, as well as current surgical techniques. Research regarding expansion of candidacy, hearing preservation cochlear implantation, and implantation for unilateral deafness are described. Lastly...
Aline Mizozoe de Amorim
Full Text Available OBJETIVO: descrever os resultados da avaliação auditiva de uma família com perda auditiva de caráter hereditário autossômico dominante. MÉTODOS: foram avaliados 17 indivíduos, por meio da audiometria tonal, audiometria vocal, timpanometria e pesquisa dos reflexos acústicos, além de acompanhamento genético. RESULTADOS: Dos 17 sujeitos avaliados, 11 apresentaram algum grau de perda auditiva neurossensorial (64,7%, sendo oito do sexo feminino (73% e três do sexo masculino (27%. A idade dos sujeitos avaliados variou de cinco a 68 anos (média=29,6 e a idade do aparecimento da queixa variou de 20 a 38 anos (média=26,1. Ocorreu a progressão da perda auditiva com o aumento da idade, sendo que a partir dos 41 anos, não houve indivíduos com audição normal na família. CONCLUSÃO: a investigação audiológica de todos os membros da família, independentemente da queixa, é imprescindível, pois a perda auditiva pode existir, mesmo que esta ocorra em freqüências isoladas.PURPOSE: to describe the hearing findings of a family with autosome dominant hereditary hearing loss. METHODS: we evaluated 17 subjects. The evaluation was made by pure tone audiometry, Speech audiometry, tympanometry and acoustic reflex testing, in addition to genetic follow-up. RESULTS: from 17 evaluated subjects, 11 showed some degree of neurosensorial hearing loss (64.7%, being 8 female gender (73% and 3 male gender (27%. The subject age varied from 5 to 68 years (average = 39.6 and the time from the complaint's appearance varied from 20 to 38 years. The hearing loss was modified with age. We did not find normal hearing after the age of 41 years in the family. CONCLUSION: the hearing investigation regarding all members of the family regardless of any complaint is extremely indispensable due to the existence of hearing loss even when limited to isolated frequencies.
Bukhari, Ihtisham; Mujtaba, Ghulam; Naz, Sadaf
Mutations of GJB2, which encodes connexin 26, are the most common cause of hereditary hearing loss in many human populations. This study was initiated to determine the prevalence of GJB2 mutations in individuals with hearing loss from the Hazara Division in Pakistan. We recruited 70 participants with nonsyndromic deafness segregating as an apparently recessive trait and directly sequenced the GJB2 coding region from their DNA. The homozygous mutations c.71 G?A (p.W24X), c.104 T?G (p.I35S), an...
Mujtaba, Ghulam; Bukhari, Ihtisham; Fatima, Amara; Naz, Sadaf
Mutations in PJVK, encoding Pejvakin, cause autosomal recessive nonsyndromic hearing loss in humans at the DFNB59 locus on chromosome 2q31.2. Pejvakin is involved in generating auditory and neural signals in the inner ear. We have identified a consanguineous Pakistani family segregating sensorineural progressive hearing loss as a recessive trait, consistent with linkage to DFNB59. We sequenced PJVK and identified a novel missense mutation, c.1028 G>C in exon 7 (p.C343S) co-segregating with th...
H. A. Kattan; R. F. Jarrar; Z. Z. Mahasin
OBJECTIVES Hearing loss is one of the most common disabilities in children with Down's syndrome. The objective of this study is to investigate the incidence and types of hearing loss in Down's syndrome patients. METHODS Twenty-six subjects with Down's syndrome aged between 2 and 17 year old were evaluated during the year 1998, referred randomly by the Pediatric Department and the Down's Syndrome Centre. Screening audiological procedures were used to evaluate these...
Marriage, Josephine E; Moore, Brian C J
Fast-acting, wide-dynamic-range compression (WDRC) has been shown to give better discrimination of soft speech and shouted speech than linear amplification for moderately hearing-impaired young adults. For severe and profound hearing losses, higher compression ratios are needed. The resultant distortion of the temporal envelope and reduced modulation depth may offset improvements in audibility offered by WDRC. This study compares the effectiveness of WDRC and linear amplification for children with different degrees of hearing loss. Pre-recorded tests of closed-set consonant confusions and open-set word recognition were developed to assess performance. Three groups of subjects (aged 4-14 years) with moderate (51-70 dB), severe (71-90 dB) and profound (91-115 dB) hearing loss were fitted with hearing aids programmed with WDRC or linear amplification. The frequency response was adjusted to match each child's own hearing aid prescription. For each group, stimuli were presented both in quiet and in noise at levels chosen to avoid floor and ceiling effects. Consonant confusion scores for the profound and severe groups combined and for the moderate group were significantly better with WDRC than with linear amplification. Open-set test results showed greater variability. Although mean scores were higher for WDRC than for linear processing, the effects were of marginal statistical significance. PMID:14582638
Ana Karina Lima, Buriti; Simone Helena dos Santos, Oliveira; Lilian Ferreira, Muniz.
Full Text Available OBJETIVO: Investigar a ocorrência de perda auditiva em crianças com HIV/AIDS e verificar sua associação com a carga viral, as doenças oportunistas e o tratamento antirretroviral instituído. MÉTODOS: Estudo descritivo, transversal, realizado em 23 crianças com HIV/AIDS de dois serviços especiali [...] zados de João Pessoa (PB). Seus responsáveis responderam a um questionário, contendo dados sobre a situação clínica e a saúde auditiva das crianças, sendo estas submetidas a avaliação audiológica. Foram respeitadas as orientações para pesquisa em seres humanos contidas na Resolução CNE Nº 196/1996. Os achados foram analisados a partir da estatística descritiva. RESULTADOS: Observou-se que a lamivudina (3TC) foi o antirretroviral mais utilizado em 17 (94,4%) pacientes, seguido do Kaletra (KAL), administrado em 14 (77,8%) pacientes, do d4T em 11 (61,1%) e da zidovudina (AZT) em sete (38,9%). A otite foi a doença oportunista de maior frequência com 11 (61,1%) registros. No exame audiométrico, observou-se 39 (84,8%) orelhas com perda auditiva e sete (15,2%) normais. Na imitanciometria, encontrou-se cinco (10,9%) orelhas normais, caracterizadas por curvas timpanométrica tipo A. As demais 41 (89,1%), mostraram-se alteradas com predominância na curva do tipo B em 67,4% dos casos. CONCLUSÃO: Houve alterações auditivas nas crianças com HIV/AIDS analisadas neste estudo, sendo as perdas auditivas discretas as de maior ocorrência. Foi verificada associação significativa com o uso da terapia antirretroviral e com a otite. Desta forma, percebe-se a importância do monitoramento auditivo e da intervenção o mais cedo possível, favorecendo um desenvolvimento linguístico adequado e reduzindo possíveis dificuldades de aprendizagem e de inclusão social. Abstract in english PURPOSE: To investigate the occurrence of hearing loss in children with HIV and its association with viral load, opportunistic diseases, and antiretroviral treatment. METHODS: A cross-sectional study was carried out with 23 HIV-positive children under care at two specialized centers in João Pe [...] ssoa, Paraíba, Brazil. Their parents or legal guardians responded to a questionnaire, containing data on the clinical situation and the hearing health of the children, who were then submitted to audiological assessment. We complied with the guidelines for human research contained in the CNE (National Education Council) Resolution number 196/1996. The findings were analyzed through descriptive statistics. RESULTS: We observed that lamivudine (3TC) was the antiretroviral drug most used in 17 (94.4%) patients, followed by Kaletra (KAL), administered in 14 (77.8%) patients, d4T in 11 (61.1%) patients, and zidovudine (AZT) in 7 (38.9%) participants. Otitis was the most frequent opportunistic disease, with 11 (61.1%) cases. In the audiometric examination, we observed 39 (84.8%) ears with hearing loss and 7 (15.2%) normal ears. After the immitance testing, we found five (10.9%) normal ears, characterized by type A tympanometric curves. The other 41 (89.1%) ears were revealed as altered, with predominance of type B curves in 67.4% of the cases. CONCLUSION: There were hearing alterations in children with HIV/AIDS analyzed in this study. Discreet hearing losses were the most occurring. We verified statistically significant associations with the use of antiretroviral therapy and otitis. Therefore, we point out the importance of auditory monitoring and intervention as soon as possible, thus favoring adequate development in language and decreasing possible difficulties in learning and social inclusion.
Giselle Goulart de Oliveira Matos
Full Text Available OBJETIVO: avaliar a ordenação temporal em adultos com perdas auditivas sensorioneurais de graus leve e moderado, por meio do teste Padrão de Duração, a fim de verificar se essas perdas influenciam no desempenho do teste. MÉTODO: foram avaliados 57 pacientes, com idades entre 20 a 59 anos, sendo 30 homens e 27 mulheres. Todos responderam a anamnese, passaram por avaliação otorrinolaringológica, avaliação audiológica básica e triagem do processamento auditivo, com o teste Dicótico de Dígitos. Os participantes foram alocados em 3 grupos: G1 (audição normal para as médias de 0,5/1/2 KHz e de 3/4/6 KHz, G2 (perda auditiva de grau leve em pelo menos uma das médias e G3 (perda de grau moderado em pelo menos uma das médias. A comparação foi realizada entre a audição normal e a presença da perda auditiva (G2+G3 e entre os três grupos descritos. O índice de normalidade utilizado foi de 70% de acertos. Para a análise estatística foram utilizados os testes não-paramétricos de Mann-Whitney, ANOVA de Kruskal-Wallis, Análise de Variância "one-way", t de Student, Qui-quadrado. O critério de determinação de significância adotado foi o nível de 5%. RESULTADOS: observou-se presença significante de homens no grupo com perda auditiva. A porcentagem de acertos da amostra geral foi de 62,3% e não ocorreu diferença estatisticamente significante entre os grupos. CONCLUSÃO: a habilidade de ordenação temporal avaliada pelo teste Padrão de Duração não sofre influência da perda auditiva sensorioneural de grau leve e moderado.PURPOSE: to evaluate the temporal ordering ability in adults with mild to moderate sensoryneural hearing loss, through the Duration Pattern Test, in order to determine whether these losses affect the performance of the aforesaid test. METHOD: 57 adults from 20 to 59 years of age were evaluated, being 30 male and 27 female. All of them underwent a screening test consisting of medical history, ENT examination, basic audiological testing and hearing process screening with the Dichotic Digit Test. After this process, the participants were allocated into three groups, namely: G1 (normal hearing for the averages of 0.5 / 1 / 2 and 3/4/6 KHz, G2 (mild hearing loss in at least one of the averages and G3 (moderate loss in at least one of the averages. The results were analyzed through comparison between normal hearing and the presence of hearing loss (G2 + G3 and among the three groups described. The normality index used was 70% of successes. For statistical analysis, the tests used were Nonparametric Mann-Whitney, Kruskal-Wallis ANOVA, "One-way" Analysis of Variance, student's t and chi-square. The determining criterion of significance adopted was level 5%. RESULTS: there was a significant presence of men with hearing loss in the group. The percentage of correct answers in the overall sample was 62.3%, revealing no statistically significant difference among groups. CONCLUSION: the temporal ordering ability evaluated by the Duration Pattern Test is not influenced by mild to moderate sensoryneural hearing loss.
Full Text Available Mouse models are key tools for studying cochlear alterations in noise-induced hearing loss and for evaluating new therapies. Stimuli used to induce deafness in mice are usually white and octave band noises that include very low frequencies, considering the large mouse auditory range. We designed different sound stimuli, enriched in frequencies up to 20 kHz (“violet” noises to examine their impact on hearing thresholds and cochlear cytoarchitecture after short exposure. In addition, we developed a cytocochleogram to quantitatively assess the ensuing structural degeneration and its functional correlation. Finally, we used this mouse model and cochleogram procedure to evaluate the potential therapeutic effect of transforming growth factor ?1 inhibitors P17 and P144 on noise-induced hearing loss. CBA mice were exposed to violet swept-sine noise with different frequency ranges (2-20 or 9-13 kHz and levels (105 or 120 dB SPL for 30 minutes. Mice were evaluated by auditory brainstem response and otoacoustic emission tests prior to and 2, 14 and 28 days after noise exposure. Cochlear pathology was assessed with gross histology; hair cell number was estimated by a stereological counting method. Our results indicate that functional and morphological changes induced by violet swept-sine noise depend on the sound level and frequency composition. Partial hearing recovery followed the exposure to 105 dB SPL, whereas permanent cochlear damage resulted from the exposure to 120 dB SPL. Exposure to 9-13 kHz noise caused an auditory threshold shift in those frequencies that correlated with hair cell loss in the corresponding areas of the cochlea that were spotted on the cytocochleogram. In summary, we present mouse models of noise-induced hearing loss, which depending on the sound properties of the noise, cause different degrees of cochlear damage, and could therefore be used to study molecules which are potential players in hearing loss protection and repair.
Schmidt, Sara A.; Akrofi, Kwaku; Carpenter-Thompson, Jake R.; Husain, Fatima T
We investigated auditory, dorsal attention, and default mode networks in adults with tinnitus and hearing loss in a resting state functional connectivity study. Data were obtained using continuous functional magnetic resonance imaging (fMRI) while the participants were at “rest” and were not performing any task. Participants belonged to one of three groups: middle-aged adults with tinnitus and mild-to-moderate high frequency hearing loss (TIN), age-matched controls with normal hearing and no ...
Mun, Seog-Kyun; Hong, Young-Ho; Kang, Suk-Hyung; Hwang, Sung-Nam
A 57-year-old man presented to the outpatient department with sudden bilateral hearing loss. The otological examination suggested bilateral severe sensorineural hearing loss. After several hours, the patient complained of a headache and became drowsy. The brain computed tomography showed a 3 × 4 cm intracerebral hemorrhage (ICH) of the left temporal lobe. Surgery was performed and 34 days after the procedure the patient was discharged from the hospital with severe bilateral sensorineural hear...
The number of students studying popular music, music technology, and sound engineering courses at both school and university to has increased rapidly in the last few years. These students are generally involved in music-making/recording and listening to a high level, usually in environments with amplified music. Recent studies have shown that these students are potentially exposed to a high risk of noise-induced hearing loss (NIHL( and are not covered by the same regulatory framework as employees. This study examined the pure tone air conduction hearing thresholds of 50 undergraduate students, including recent school leavers, on a range of popular music courses, to assess if there was evidence of hearing loss. Forty-four percent of students showed evidence of audiometric notch at 4-6 kHz, and 16% were classified under the UK Occupational Health and Safety guidelines as exhibiting mild hearing loss. Instance of audiometric notch was considerably higher than reported from studies of the general population but was around the same level or lower than that reported from studies of "traditional" music courses and conservatoires, suggesting no higher risk for popular music students than for "classical" music students. No relationship with age was present, suggesting that younger students were as likely to exhibit audiometric notch as mature students. This indicates that these students may be damaging their hearing through leisure activities while still at school, suggesting a need for robust education measures to focus on noise exposure of young people. PMID:21695357
Johnson, Kenneth R; Longo-Guess, Chantal M; Gagnon, Leona H
Inbred mouse strains serve as important models for human presbycusis or age-related hearing loss. We previously mapped a locus (ahl8) contributing to the progressive hearing loss of DBA/2J (D2) mice and later showed that a missense variant of the Fscn2 gene, unique to the D2 inbred strain, was responsible for the ahl8 effect. Although ahl8 can explain much of the hearing loss difference between C57BL/6J (B6) and D2 strain mice, other loci also contribute. Here, we present results of our linkage analyses to map quantitative trait loci (QTLs) that modify the severity of hearing loss associated with the D2 strain Fscn2 (ahl8) allele. We searched for modifier loci by analyzing 31 BXD recombinant inbred (RI) lines fixed for the predisposing D2-derived Fscn2 (ahl8/ahl8) genotype and found a statistically significant linkage association of threshold means with a QTL on Chr 5, which we designated M5ahl8. The highest association (LOD 4.6) was with markers at the 84-90 Mb position of Chr 5, which could explain about 46 % of the among-RI strain variation in auditory brainstem response (ABR) threshold means. The semidominant nature of the modifying effect of M5ahl8 on the Fscn2 (ahl8/ahl8) phenotype was demonstrated by analysis of a backcross involving D2 and B6.D2-Chr11D/LusJ strain mice. The Chr 5 map position of M5ahl8 and the D2 origin of its susceptibility allele correspond to Tmc1m4, a previously reported QTL that modifies outer hair cell degeneration in Tmc1 (Bth) mutant mice, suggesting that M5ahl8 and Tmc1m4 may represent the same gene affecting maintenance of stereocilia structure and function during aging. PMID:26092689
Crowe, Kathryn; McLeod, Sharynne
The purpose of this study was to systematically review the factors affecting the language, speech intelligibility, speech production, and lexical tone development of children with hearing loss who use spoken languages other than English. Relevant studies of children with hearing loss published between 2000 and 2011 were reviewed with reference to…
Rekkedal, Ann Mette
This study investigates factors associated with the listening perception of classroom communication by students with hearing loss, based on the students' and their teachers' views. It also examines how students with different degrees of hearing loss may perceive their classmates. To explore the relationships between the factors Structural Equation…
Full Text Available We compared the extent of temporary threshold shift (TTS and hair cell loss following high level 4 kHz noise exposure with those preconditioned with moderate level 1 and 4 kHz octave band noise. Fifteen Male albino guinea pigs (300- 350 g in weight were randomly allocated into three groups: those exposed to 4 kHz octave band noise at 102 dB SPL (group 1, n=5; those conditioned with 1 kHz octave band noise at 85 dB SPL, 6 hours per day for 5 days, then exposed to noise (group 2, n=5; those conditioned with 4 kHz octave band noise at 85 dB SPL, then exposed to noise (group 3, n=5. An hour and one week after noise exposure, threshold shifts were evaluated by auditory-evoked brainstem response (ABR and then animals were euthanized for histological evaluation. We found that TTS and cochlear damage caused by noise exposure were significantly reduced by 1 kHz and 4 kHz conditioning (P<0.001. We also showed that 4 kHz protocol attenuates noise- induced TTS but no significant TTS reduction occurred by 1 kHz conditioning. Both protocol protected noise-induced cochlear damage. We concluded that lower tone conditioning could not protect against higher tone temporary noise-induced hearing loss, thus conditioning is a local acting and frequency-dependent phenomenon.
One of the most dangerous factors in railroad transport is noise. Drivers of locomotives are exposed to the noise of engines and cars on rails, transporting workers to their places of work; coupling of cars and emptying cars by overturning them; and the transport of fire cars. To determine the amount of noise drivers are subjected to, the Zavodski Institute for National Public Health conducted studies on noise in underground mines. By means of portable noisemeters worn by drivers measurement of the noise of cars running on rails, passing over joints of railroad tracks, and reflected from the rock walls of the drift was made. Mine ventilators added a constant source of noise. At the Zavodski Institute, 64 drivers were examined in the otorhinolaryngology department. Thresholds of hearing were measured by means of tonal audiometry. Combining results of this examination with measurements of noise in the uranium mines, it was determined that the hearing of drivers of mine locomotives deteriorated on the average of 1 dB per year at a frequency of 4000 Hz. (6 refs.) (In Russian)
Since Rand and Kurze discussed the possibility of the anatomic preservation of the cochlear nerve via the posterior fossa transmeatal approach for the acoustic neurinoma, there have been increasingly many reports on the preservation of cochlear nerve function. With recent advances in diagnostic tools, today's neurosurgeon is able to make an earlier and more precise diagnosis of acoustic neurinomas even when the patient has good hearing. If useful hearing is to be kept, the cochlear nerve and blood supply of the labyrinth have to be preserved. In addition, surgical entry into the labyrinth, upon the removal of the posterior wall of the internal auditory canal, must be avoided, since it is likely to result in permanent hearing loss. Because of its superior contrast and spatial resolution, thin-section and high-resolution computed tomography of the temporal bone has the great advantage of demonstrating the exact relationship of the internal auditory canal to the posterior semicircular canal, the vestibule, and the common crus. In this study, thin-section, high-resolution computed tomography of the temporal bone was performed in 11 cases of acoustic neurinoma pre- and postoperatively. At operation, the lateral limit of the bone removal of the posterior internal auditory canal was determined on the basis of preoperative computed tomography of the temporal bone. As a result, inadvertent entry into the labyrinth was avoided, and useful hearing was preserved in 8 cases. In order to preserve useful hearing following total tumor removal, it is essential to plan the operative strategy meticulously on the basis of the findings of the preoperative investigation, Including temporal bone CT. (author)
T G, Sanchez; S C M, Rocha; K A B, Knobel; M A, Kii; R M R, Santos; C B, Pereira.
Full Text Available Apesar das alucinações musicais causarem grandes repercussões na vida dos pacientes, sempre foram pouco valorizadas e estudadas pelos profissionais. Alguns investigadores sugerem uma combinação de disfunções periféricas e centrais como o mecanismo causador das alucinações. A fisiopatologia mais acei [...] ta entre os pesquisadores de alucinação musical associada à hipoacusia ou anacusia (causada por lesão coclear, de nervo coclear ou interrupção de informação na ponte ou mesencéfalo) é a desibinição de circuitos de memória auditiva devido à deprivação sensorial. Em relação às áreas corticais envolvidas na alucinação musical, há evidência de que um mecanismo excitatório no córtex temporal superior, como nas epilepsias, seja responsável pela alucinação musical. Finalmente, considerando a lateralidade, estudos funcionais de percepção e imagética em indivíduos normais mostraram que canções com letras levam a ativação temporal bilateral e melodias ativam apenas o lobo temporal direito. É bem documentado o efeito de aparelhos auditivos na alucinação musical através de uma melhora da perda auditiva. Neurolépticos, antidepressivos e anticonvulsivantes têm sido usados no tratamento de alucinação musical na experiência clínica, mas não há eficácia comprovada na maioria dos casos. Há casos descritos na literatura com melhora das alucinações musicais com uso de carbamazepina, meclobemide e donepezil, entretanto sem resultados consistentes. Abstract in english In spite of the fact that musical hallucination have a significant impact on patients' lives, they have received very little attention of experts. Some researchers agree on a combination of peripheral and central dysfunctions as the mechanism that causes hallucination. The most accepted physiopathol [...] ogy of musical hallucination associated to hearing loss (caused by cochlear lesion, cochlear nerve lesion or by interruption of mesencephalon or pontine auditory information) is the disinhibition of auditory memory circuits due to sensory deprivation. Concerning the cortical area involved in musical hallucination, there is evidence that the excitatory mechanism of the superior temporal gyrus, as in epilepsies, is responsible for musical hallucination. In musical release hallucination there is also activation of the auditory association cortex. Finally, considering the laterality, functional studies with musical perception and imagery in normal individuals showed that songs with words cause bilateral temporal activation and melodies activate only the right lobe. The effect of hearing aids on the improvement of musical hallucination as a result of the hearing loss improvement is well documented. It happens because auditory hallucination may be influenced by the external acoustical environment. Neuroleptics, antidepressants and anticonvulsants have been used in the treatment of musical hallucination. Cases of improvement with the administration of carbamazepine, meclobemide and donepezil were reported, but the results obtained were not consistent.
José, Maria Renata; Mondelli, Maria Fernanda Capoani Garcia; Feniman, Mariza Ribeiro; Lopes-Herrera, Simone Aparecida
Introduction?Childhood is a critical period for language development and maturation of the central auditory system. Unilateral hearing loss (UHL) is considered a minimal impairment, and little is discussed regarding its impact on the development of language, communication, and school performance.
Pratt, Sheila R.; Kuller, Lewis; Talbott, Evelyn O.; McHugh-Pemu, Kathleen; Buhari, Alhaji M.; Xu, Xiaohui
Purpose: The goal of this study was to determine the impact of age, gender, and race on the prevalence and severity of hearing loss in elder adults, aged 72-96 years, after accounting for income, education, smoking, and clinical and subclinical cardiovascular disease. Methods: Air-conduction thresholds for standard and extended high-frequency…
Mohammad Hassan Khalessi
Fourteen patients with bilateral low frequency sensorineural hearing loss were found with disproportionate speech discrimination scores. These patients were submmitted to a comprehensive audiological, electrophysiological, neurological, and radiological battery of investigation. The results pointed to a lesion probably in the central auditory pathway.
Melo, Antonio Antunes
Full Text Available Introduction: At the differentiated diagnosis of asymmetrical sensorineural hearing losses, vascular disorders are present, one of which is megadolicho basilar artery. This disease is generally asymptomatic, and when symptoms are found, they can be caused by a compression or ischemia. Clinically, sensorineural hearing loss, tinnitus, headache, facial hypoesthesia, trigeminal neuralgia, vertigo, diplopia and facial palsy, among others, are likely to occur. The image examination of choice for its diagnosis is nuclear magnetic resonance. The megadolicho basilar artery therapy can be surgical or conservative, according to the associated findings. A multidisciplinary approach, including a neurologist, neurosurgeon and an otorhinolaryngologist is recommended for a proper administration of the case. Objective: Report the case of a patient with asymmetrical sensorineural hearing loss, diagnosed of megadolicho basilar artery. Case report: JBS, 57-year-old white male with a history of asymmetrical sensorineural hearing loss and bilateral whistle-like tinnitus for several years. The otorhinolaryngologic evaluation, including otoscopy, anterior rhinoscopy and oral pharynx, was normal. Final Comments: The treatment consisted in following up with the patient, controlling the tinnitus by drugs and using an individual sound amplification apparatus on the left ear.
Conclusion: Auditory function in neonates who are admitted to a NICU, especially those treated with oxygenor antibiotics and those born prematurely, should be assessed during their stay in hospital. The importance of early diagnosis of hearing loss and intervention in these neonates and avoidance of any unnecessary oxygenor antibiotic therapy needs to be further promoted.
Begeer, J.H.; Scholte, F A; Essen, A J Van
Two sisters are described with a disorder characterised by mental retardation, congenital cataract, progressive spinocerebellar ataxia, sensorineural deafness, and signs of peripheral neuropathy. Progressive hearing loss, ataxia, and polyneuropathy became evident in the third decade. The differential diagnosis of this syndrome is discussed including the syndromes described by Berman et al and Koletzko et al.
McShane, Damian; Mitchell, Jeanette
Summarizes a number of studies which have attempted to document the prevalence of otitis media among American Indians. Reviews findings concerning psycho-educational consequences of otitis media and mild-to-moderate hearing loss, and their importance in American Indian education. Recommends procedures for creating an optional language listening…
Harrington, Marjorie; DesJardin, Jean L.; Shea, Lynn C.
The goal of this longitudinal study is to examine the relationships between early child factors (i.e., age at identification, enrollment in early intervention, oral language skills) and school readiness skills (i.e., conceptual knowledge) in a group of young children with hearing loss (HL). Standardized language, cognition, and conceptual…
Tremblay, Kelly; Ross, Bernhard
It is well documented that aging adversely affects the ability to perceive time-varying acoustic cues. Here we review how physiological measures are being used to explore the effects of aging (and concomitant hearing loss) on the neural representation of temporal cues. Also addressed are the implications of current research findings on the…
Toscano, Carla Fabiana da Silva
Full Text Available Introduction: Posture is determined by the performance of the visual, somatosensory and vestibular systems. Children with hearing loss can present problems in their posture or postural control, enabling postural deviations and alterations to appear in their vertebral column, possibly provoked by a hypoactivity of the vestibular system as a result of deafness. Objective: To evaluate the posture of the vertebral column in children and teenagers with hearing loss at school age, taking into consideration the sample gender and age. Method: A descriptive and prospective study was performed at both Duque de Caxias School and Rotary Rehabilitation and Special Education Center in Caruaru - Pernambuco. 44 students aged between 7-17 years old, out of whom 22 were female and 22 were male, with hearing loss were evaluated. The study was developed by way of a postural evaluation, using a symmetrograph, marking specific anatomical points with stickers placed over polystyrene balls and fixed with double-sided adhesive tape. Results:The results showed that all of the individuals evaluated in this study presented some kind of postural alteration in their vertebral column. Scoliosis was the most observed alteration among the students (84.1%, followed by thoracic hyperkyphosis (68.2%. Conclusion: It has been concluded that children and teenagers with hearing loss are exposed to postural alteration in their vertebral column. Such a condition can be associated with a number of factors comprising unfavorable ergonomics of the school environment, bad postural habits and impairment of the vestibular system by virtue of the hearing loss.
Rajendran Venkadesan PhD; Glory Roy Finita PhD
ObjectiveSensorineural hearing loss is believed to be the result of a physiologic malfunction in the inner ear or acoustic nerve. Depending on the rapidity of progressionand severity, sensorineural hearing loss can be endlessly annoying, frightening and can constitute a permanent after effect. Moreover, there is no surgicalprocedure that can reverse or lessen the severity of a sensorineural hearing loss.Furthermore, children with sensorineural hearing loss present with additional disabilities...
Hultcrantz, Elisabeth; Nosrati-Zarenoe, Ramesh
A randomized placebo-controlled study has demonstrated no effect of prednisolone in customary dosage on idiopathic sudden sensorineural hearing loss (ISSNHL). The aim of the present paper is to analyse a larger patient group by meta-analysis of data from the RCT together with a corresponding material drawn from the Swedish national database for ISSNHL. Data from 192 patients, 18-80 years with ISSNHL, were available. All had an acute hearing loss of at least 30 dB measured as PTA in the three most affected contiguous frequencies. All patients had been enrolled within one week after onset and evaluated by audiograms after 3 months. 45/99 (RCT) and 54/99 (the database) had been treated with prednisolone in tapering doses from 60 mg daily and 42/93 with placebo (RCT) or 51/93 with no treatment (the database). Primary outcome was the mean hearing improvement on day 90 for the different groups. A mean difference of >10 dB improvement was required to demonstrate a treatment effect for prednisolone compared to placebo/no treatment. No significant difference was seen between the prednisolone group and placebo/no treatment (p = 0.06). Total recovery was 38% in prednisolone group, 40% in the placebo and 14% in the no treatment group. Vertigo at the onset of hearing loss and age at onset had an equal negative prognostic value in all groups and signs of inflammation had a positive effect. Prednisolone in customary dosage does not influence recovery after ISSNHL. PMID:25351498
Smith, Sherri L; Pichora-Fuller, M Kathleen
Listeners with hearing loss commonly report having difficulty understanding speech, particularly in noisy environments. Their difficulties could be due to auditory and cognitive processing problems. Performance on speech-in-noise tests has been correlated with reading working memory span (RWMS), a measure often chosen to avoid the effects of hearing loss. If the goal is to assess the cognitive consequences of listeners' auditory processing abilities, however, then listening working memory span (LWMS) could be a more informative measure. Some studies have examined the effects of different degrees and types of masking on working memory, but less is known about the demands placed on working memory depending on the linguistic complexity of the target speech or the task used to measure speech understanding in listeners with hearing loss. Compared to RWMS, LWMS measures using different speech targets and maskers may provide a more ecologically valid approach. To examine the contributions of RWMS and LWMS to speech understanding, we administered two working memory measures (a traditional RWMS measure and a new LWMS measure), and a battery of tests varying in the linguistic complexity of the speech materials, the presence of babble masking, and the task. Participants were a group of younger listeners with normal hearing and two groups of older listeners with hearing loss (n = 24 per group). There was a significant group difference and a wider range in performance on LWMS than on RWMS. There was a significant correlation between both working memory measures only for the oldest listeners with hearing loss. Notably, there were only few significant correlations among the working memory and speech understanding measures. These findings suggest that working memory measures reflect individual differences that are distinct from those tapped by these measures of speech understanding. PMID:26441769
Mario Emilio, Zernotti; Maria Fernanda, Di Gregorio; Andrea C. Bravo, Sarasty.
Full Text Available Atresia óssea e otite média crônica são os principais grupos de beneficiários com implantes do ouvido médio. Cirurgia de atresia é tecnicamente complexo, tem muitas complicações e resultados funcionais pobres. Os aparelhos auditivos osseointegrados são uma alternativa. Eles fornecem um ganho funcion [...] al muito bom, mas tem muitos problemas de pele e osseointegração. Na otite média crônica, ossiculoplastias resolveram parcialmente o problema de audição. Infelizmente, em alguns casos de otites média e cavidades abertas, equipamentos com aparelhos auditivos convencionais são difíceis e muitas vezes insatisfatórios. OBJETIVO: Determinar a utilidade de um implante do ouvido médio. Desenho de estudo longitudinal. MÉTODOS: Vibrant-Soundbrigde foi implantado em oito pacientes com perda auditiva mista grave. Quatro apresentavam otite média crônica e quatro apresentavam atresia unilateral. A colocação do estimulador (FMT ou Floating Mass Transducer) foi em cinco pacientes na janela redonda, dois no estribo e um na janela oval. RESULTADOS: Ganho funcional foi de 35 dB, 40 dB, 48,7 dB e 50 dB para as frequências de 500, 1000, 2000 e 4000 Hz, respectivamente. CONCLUSÃO: Vibrant-Soundbrigde é uma excelente opção no restabelecimento da audição em perda auditiva mista grave e profunda. Ele fornece um excelente ganho funcional em doenças de difícil tratamento com equipamentos convencionais. Abstract in english Osseous atresia and chronic otitis media are diseases benefit with middle ear implants. Surgery for atresia is technically complicated, has significant number of complications and functional results are often poor. The osseointegrated hearing aids are an alternative. They provide a very good functio [...] nal gain, but have many problems with the skin and osseointegration. In chronic otitis media, the ossiculoplasty solved partially the hearing problem. Unfortunately in some cases of otitis media and in open cavities fitted with conventional hearing aids the gain is unsatisfactory. AIM: To determine the usefulness of an active middle ear implant. MATERIAL AND METHOD: Longitudinal Study. Vibrant- Soundbrigde was implanted in eight patients with severe mixed hearing loss. Four patients had chronic otitis media and four had unilateral atresia. The placement of the stimulator (FMT or Floating Mass Transducer) was in five patients on round window, two in stapes and one in the oval window. RESULTS: Functional gain was 35 dB, 40 dB, 48.7 dB and 50 dB for the frequencies 500, 1000, 2000 and 4000 Hz, respectively. CONCLUSION: Vibrant-Soundbrigde is an excellent option in hearing recovery in severe and profound mixed hearing loss. It also provides an excellent functional gain in diseases difficult to treat with conventional hearing aids.
Correlação entre perda auditiva e resultados dos questionários Hearing Handicap Inventory for the Adults: Screening Version HHIA-S e Hearing Handicap Inventory for the Elderly - Screening Version - HHIE-S / Correlation between hearing loss and the results of the following questionnaires: Hearing Handicap Inventory for the Adults - Screening Version HHIA-S and Hearing Handicap Inventory for the Elderly - Screening Version - HHIE-S
Isabela Hoffmeister, Menegotto; Cristina Loureiro Chaves, Soldera; Paula, Anderle; Tanise Cristaldo, Anhaia.
Full Text Available INTRODUÇÃO: Os questionários de autoavaliação são úteis para quantificar as consequências emocionais e sociais/situacionais percebidas em função da perda de audição, podendo ser utilizados em diversas situações na rotina clínica, como a triagem auditiva. OBJETIVO: Verificar a sensibilidade e a espec [...] ificidade dos questionários HHIA-S e HHIE-S na detecção de perda auditiva e suas aplicabilidades em triagens auditivas e analisar a capacidade desses questionários em detectar diferentes graus de comprometimento auditivo na população estudada. MÉTODO: Estudo retrospectivo, 51 indivíduos, entre 18 e 88 anos, responderam aos questionários Hearing Handicap Inventory for Adults Screening Version - HHIA-S e Hearing Handicap Inventory for the Elderly Screening Version - HHIE-S em sala de espera de um ambulatório de otorrinolaringologia do SUS. RESULTADOS: Os instrumentos revelaram baixa sensibilidade (47%), não identificando indivíduos com perda auditiva; porém, apresentaram alta especificidade (75%), identificando, corretamente, indivíduos que não apresentavam problemas de audição. Ainda, não existiu associação significativa entre o grau da perda auditiva e o grau de restrição de participação. CONCLUSÃO: Os referidos questionários apresentaram baixa sensibilidade e alta especificidade, não sendo eficazes para triagens auditivas em um grupo com queixas auditivas prévias, e também não foram capazes de detectar diferentes tipos e graus de comprometimento auditivo. Abstract in english INTRODUCTION: The self-assessment questionnaires are useful to measure the emotional and social/transient consequences resulting from hearing loss, and they can be used in a wide range of situations in the clinical routine, such as auditory screening. OBJECTIVE: Check the sensitivity and specificiti [...] es of HHIA-S and HHIE-S questionnaires to identify a hearing loss and their usages in auditory screenings, as well as analyze the ability of these questionnaires to detect different degrees of hearing impairments in the studied people. METHOD: Retrospective study with 51 individuals aged between 18 and 88, who filled out the Hearing Handicap Inventory for Adults Screening Version - HHIA-S and Hearing Handicap Inventory for the Elderly Screening Version - HHIE-S questionnaires at the waiting room of the Brazilian Unified Health System (SUS)'s otorhinolaryngology infirmary. RESULTS: The instruments showed a low sensitivity (47%), not identifying individuals with a hearing loss; however, they showed a high specificity (75%), accurately identifying individuals with no hearing disorder. Moreover, no significant association between the degree of hearing loss and the constraint degree for participation was found. CONCLUSION: the aforementioned questionnaires revealed a low sensitivity and a high specificity, proving to be ineffective for auditory screenings in a group with previous hearing complaints in addition to being unable to detect different types and degrees of hearing impairment.
Liu, Hong; Gu, Zheng; Kang, Hou-Yong; Ke, Xia; Shen, Yang; Wang, Xiao-Qiang; Hu, Guo-Hua; Zeng, Ji-Hong; Hong, Su-Ling
Fc receptor-like 3 (FCRL3) has recently been associated with susceptibility to several immune-related diseases. In this study, we evaluated the potential association of FCRL3 polymorphisms with sudden sensorineural hearing loss (SSNHL) in a Chinese Han population. Five single-nucleotide polymorphisms (SNPs) in FCRL3-rs945635, rs3761959, rs7522061, rs10489678, and rs7528684-were genotyped in 630 patients with SSNHL and 600 healthy controls by using a PCR-restriction fragment length polymorphism assay. The allele, genotype, and haplotype frequencies in the patients and the controls were compared using a ?(2) test. Moreover, we performed haplotype analysis by using the online software platform SHEsis. The results revealed a significant association between three SNPs-rs7528684, rs3761959, and rs7522061-and SSNHL in the studied Chinese Han population. Furthermore, the AGT and GAC haplotypes were associated with a significantly higher prevalence of SSNHL than were the GAT, GGC and GGT haplotypes. However, no significant differences were detected in either the genotype or allele frequencies of the other two SNPs, rs945635 and rs10489678, between the SSNHL and control groups. Overall, this study has identified an association between FCRL3 polymorphisms and increased risk of SSNHL in a Chinese Han population. PMID:26051414
The prevalence of hearing impairment is estimated as approximately 1 on 1,000 newborn children. To assess a higher mutation detection rate in individuals with hearing loss a three-step mutation screening program consisting of GJB2 in first line, then GJB1, GJB3 and GJB6 (second step) and if tested negative or heterozygote, testing of GJA1, GJB4, SLC26A4 and PJVK (third) was performed. Audiograms were derived from all patients to characterize audiological features of GJ...
Iseli, Claire; Buchman, Craig A
Management of children with severe, severe-profound, and profound sensorineural hearing loss is best achieved using a family-centered approach by a team of health professionals, including audiologists, speech pathologists, otolaryngologists, pediatricians, genetic counselors, and early intervention programs. Early diagnosis and intervention offers the best chance for speech and language acquisition. Although hearing aids can provide some of the needed information, they are often not sufficient for spoken language development and a cochlear implant is needed. This must be combined with a strong audiology and speech therapy rehabilitation program. PMID:26293693
Jepsen, Morten LØve; Dau, Torsten
This study considered consequences of sensorineural hearing loss in ten listeners. The characterization of individual hearing loss was based on psychoacoustic data addressing audiometric pure-tone sensitivity, cochlear compression, frequency selectivity, temporal resolution, and intensity discrimination. In the experiments it was found that listeners with comparable audiograms can show very different results in the supra-threshold measures. In an attempt to account for the observed individual data, a model of auditory signal processing and perception [Jepsen et al., J. Acoust. Soc. Am. 124, 422–438 (2008)] was used as a framework. The parameters of the cochlear processing stage of the model were adjusted to account for behaviorally estimated individual basilar-membrane inputoutput functions and the audiogram, from which the amounts of inner hair-cell and outer hair-cell losses were estimated as a function of frequency. All other model parameters were left unchanged. The predictions showed a reasonably good agreement with the measured individual data in the frequency selectivity and forward masking conditions while the variation of intensity discrimination thresholds across listeners was underestimated by the model. The model and the associated parameters for individual hearing-impaired listeners might be useful for investigating effects of individual hearing impairment in more complex conditions, such as speech intelligibility in noise.
Palmer, C V; Lindley, G A
With the increasing popularity of hearing aids with wide dynamic range compression, where the goal may be to restore normal perception of loudness, there has been renewed interest in obtaining individual loudness judgments in a clinically feasible, reliable manner as part of the hearing aid evaluation. The purpose of the current investigation was to evaluate the test-retest reliability of the Contour Test of Loudness Perception. Twenty-seven adults with hearing loss participated in the experiment. They produced loudness judgments on two separate occasions. Results as assessed by the intraclass correlation statistic revealed that the Contour Test has adequate consistency and absolute agreement across frequency and loudness categories over two test sessions separated in time. Results are discussed in relation to previous reliability findings from other loudness judgment methods and other subject populations. PMID:9644618
... more in both quiet and noisy situations. Hearing aids help people who have hearing loss from damage ... your doctor. There are different kinds of hearing aids. They differ by size, their placement on or ...
Tan, Chang-qiang; Gao, Xia; Cai, Wen-jun; Qian, Xiao-yun; Lu, Ling; Huang, He
This study aimed to investigate the efficacy of gene therapy for treating autoimmune sensorineural hearing loss (ASHL) via local administration of a recombinant adenovirus vector containing the Fas ligand or interleukin IL-10 gene. Guinea pigs were divided into four groups, with different microinjections in the scala tympani. Group A were injected with FasL-EGFP, B with IL-10-EGFP, C with EGFP, and D with artificial perilymph. Seven days later, auditory brain-stem response (ABR) was tested, and the temporal bone was stained and observed by light microscopy. The spiral ligament and basement membrane were observed using transmission electron microscopy. FasL and IL-10 expression were examined using immunofluorescence histochemistry. Immunohistochemical analysis showed that the recombinant adenovirus vector in Groups A, B, and C can transfect the stria vascularis, the spiral ligament, the organ of Corti, the spiral ganglion, the region surrounding the small blood vessel in the modiolus, and the cochlear bone wall. Compared with those in Groups C and D, the ABR wave III mean thresholds were significantly lower and the inner ear immunoinflammatory responses in Groups A and B were significantly alleviated. Inhibition of immunoinflammatory response alleviated immunoinflammatory injury and auditory dysfunction. This technique shows potential as a novel therapy for ASHL. PMID:24804196
Full Text Available Background and Aim: Balance disturbance is one of the non-auditory effects of noisy industrial environments that is usually neglected. The aim of the current study was to investigate the effect of occupational noise on vestibular system among workers with noise-induced hearing loss (NIHL, based on both vestibular evoked myogenic potentials (VEMP and caloric tests.Methods: Thirty male workers with noise-induced hearing loss and thirty male matched controls were examined by VEMP and caloric tests. Study parameters included unilateral weakness, p13 and n23 latencies, and p13-n23 amplitude. Caloric test was performed only for 20 patients.Results: No significant difference was observed in unilateral weakness between the two groups. On the other hand, the difference in mean latencies of p13 in the right ear (p=0.003 and left ear (p=0.01 was significant between the two groups. However, the difference in n23 latency was significant only in the right ear (p=0.03. There was no significant difference between groups in p13-n23 amplitude.Conclusion: It seems that pars inferior of vestibule is the susceptible part in individuals with NIHL. In general, abnormal findings in both VEMP and caloric tests were more common compared to functional symptoms such as vertigo, which may be due to central compensation and the symmetry of the disorder.
Full Text Available ... It can be used when there is a mixed hearing loss as long as the bone conduction ... deafness, some cases of conductive hearing loss, or mixed hearing loss, particularly conductive hearing loss with draining ...
Binaural hearing aids communicate with each other through a wireless link for synchronization. A propagation model is needed to estimate the ear-to-ear link loss for such binaural hearing aids. The link loss is a critical parameter in a link budget to decide the sensitivity of the transceiver. In this paper, we have presented a model for the deterministic component of the ear-to-ear link loss. The model takes into account the dominant paths having most of the power of the creeping wave from the transceiver in one ear to the transceiver in other ear and the effect of the protruding part of the outer ear called pinna. Simulations are done to validate the model using in-the-ear (ITE) placement of antennas at 2.45 GHz on two heterogeneous phantoms of different age-group and body size. The model agrees with the simulations. The ear-to-ear link loss between the antennas for the binaural hearing aids in the homogeneous SAM phantom is compared with a heterogeneous phantom. It is found that the absence of the pinna an...
Kishon-Rabin, Liat; Segal, Osnat; Algom, Daniel
Purpose: To clarify the relationship between psychoacoustic capabilities and speech perception in adolescents with severe-to-profound hearing loss (SPHL). Method: Twenty-four adolescents with SPHL and young adults with normal hearing were assessed with psychoacoustic and speech perception tests. The psychoacoustic tests included gap detection…
Jensen, Ramon Gordon; Koch, Anders
Chronic suppurative otitis media (CSOM) affects 65-330 million people in the developing part of the world and develops in early childhood. Knowledge of the long-term effects on hearing is scarce. Hearing loss (HL) can cause reduced ability to communicate, impair language development and academic skills.
Conclusion: Aminoglycosides in MDR-TB patients may cause irreversible hearing loss involving higher frequencies and can become a hearing handicap as speech frequencies are too implied in more or less of the patients, thus underlining the need for regular audiologic evaluation in patients of MDR-TB during the treatment. [Int J Res Med Sci 2015; 3(7.000: 1734-1740
Full Text Available Previous investigations about the possiblee relationship between chronic supurative otitis media (CSOM and senrorineural hearing loss (SNHL have contradictory results and conclusions. A retropective study designed to evaluate SNHL at 1000 Hz and 6000 Hz frequncies related to CSOM and its association with age , disease duration and cholesteatoma. Charts of 124 patients with unilateral CSOM undergoing ear surgery from January 2003 to August 2008 reviewed. Inclusion criteria were no history of head trauma, meningitis, post-traumatic tympanic membran perforation, acoustic trauma, posible labyrintine fistula and using systemic drugs have possible cause to SNHL. Audiograms, ages and disease durations obtained from these charts were analyzed. SNHL occurred in 12 patients. There were not significant relation between age, disease duration, existence of cholesteatoma and SNHL at 1000Hz and 6000 Hz frequencies in the patients. We conclude that CSOM may cause SNHL, but in vast majority of patients this loss is not clinicaly significant.
Victor Hygor Veríssimo, Farias; Ana Karina Lima, Buriti; Marine Raquel Diniz da, Rosa.
Full Text Available OBJETIVO: investigar a ocorrência de perda auditiva induzida pelo ruído (PAIR) em carpinteiros, caracterizando a perda auditiva por faixa etária, tempo de exposição total ao ruído e uso regular de protetores auditivos durante o tempo total de exposição. MÉTODO: estudo retrospectivo, descritivo, em u [...] ma população de 80 carpinteiros da construção civil, atendidos em uma clínica particular. Foram analisados 60 trabalhadores, conforme dados obtidos na anamnese e ficha do exame audiométrico. RESULTADOS: 49% dos trabalhadores apresentaram audição normal, sendo 58% com limiares auditivos normais bilateralmente e 35% com entalhe audiométrico em 3 kHz, 4 kHz e/ou 6 kHz. 44% apresentaram perfil audiométrico sugestivo de PAIR, destes 74% foram classificados como PAIR bilateral e 19% como PAIR unilateral. Houve diferença estatística significante entre os grupo PAIR e Normal em relação às variáveis idade (p=0,001), assim como o tempo total de exposição ao ruído ocupacional (p=0,002). CONCLUSÃO: quanto maior a idade e o tempo de profissão como carpinteiro, maior é a sua alteração auditiva, principalmente, devido à exposição ao ruído elevado durante a jornada de trabalho, sendo também constatado que as medidas de controle pelo uso do protetor são insuficientes para prevenir perdas auditivas. Portanto, sugerem-se medidas preventivas em saúde auditiva ativamente nessa população estudada, no ramo da construção civil. Abstract in english PURPOSE: to investigate the occurrence of noise induced hearing loss in carpenters, characterizing the hearing loss for age group, time of total exposure to noise and regular use of hearing protectors during the total exposure time. METHOD: retrospective and descriptive study in a population of 80 c [...] onstruction carpenters, attended at a private clinic. 60 workers were analyzed, as data on medical history and record of audiometric testing. RESULTS: 49% of the workers shoed normal hearing, being 58% with normal bilaterally hearing thresholds and 35% with audiometric notch in 3 kHz, 4 kHz and/or 6 kHz. 44% showed suggestive audiometric profile of NIHL, of these 74% were classified as bilateral NIHL and 19% as unilateral NIHL. There were significant differences between the NIHL group and normal to the age variables (p=0.001), as well as the total time of exposure to occupational noise (p=0,002). CONCLUSION: the greater the age and length of employment as a carpenter were, the greater their hearing loss, mainly due to exposure to loud noise during the working day, and we also noted that measures taken in order to control the use of the auricular protector are insufficient to prevent hearing loss. Therefore, we suggest active preventive measures in hearing health in this studied population, in the field of civil construction.
Full Text Available A surdez súbita sensorioneural é uma perda auditiva súbita ou rapidamente progressiva. Na maioria dos casos a etiologia não é descoberta. Uma das causas possíveis de surdez súbita é a hemorragia intralabiríntica que, antes do surgimento da ressonância magnética, não era corretamente diagnosticada. O objetivo deste trabalho é relatar um caso de surdez súbita causada por hemorragia intralabiríntica e realizar uma revisão da literatura sobre este assunto.Sudden sensorineural hearing loss is relatively frequent. In most cases, the etiology is not discovered. One of the possible causes for sudden deafness is inner labyrinth bleeding, which was difficult to diagnose before the advent of magnetic resonance imaging. The purpose of this paper is to report a case of sudden hearing loss caused by a labyrinthine hemorrhage, and to present a review of the literature on this topic.
In the past, no definitive diagnostic study was available to assess causes of sudden-onset hearing loss and vertigo. Our observations have led to an interesting new finding: labyrinthine enhancement on Gd-enhanced MR imaging in four patients with sudden unilateral hearing loss and/or vertigo. MR findings were correlated with audiologic and vestibular studies. All patients were studied with T2-weighted axial images through the whole brain and with Gd-DTPA-enhanced, 3-mm, axial, T1-weighted images through the temporal bone. No labyrinthine enhancement was seen in 20 control patients referred for other clinical problems. Gd-MR imaging might be able to distinguish patients with retrocochlear lesions from those in whom the abnormal process is in the labyrinth or is intraaxial
Full Text Available This study describes the epidemiology of infants’ hearing loss (IHL among patients under 3 months of age at Caritas Baby Hospital, the only pediatric hospital in Palestine. It was aimed to demonstrate that IHL is a major health problem in Palestine and to assess the first available data of the newborn hearing screening program conducted between September 25, 2006 and December 31, 2011. Data was uploaded and analyzed using Microsoft Excel and the Statistical Package for the Social Sciences software (SPSS version 21. A total of 8144 infants were tested, 4812 (59% were males and 3332 (41% were females. As to their origin, 72% (5886 came from the Bethlehem district, 25% (2044 from the Hebron district, while 3% (214 from the other Palestinian districts (Jericho, Ramallah, Nablus, Jenin and Jerusalem. The transient evoked otoacoustic emissions (TEOAEs and the automated auditory brainstem response were used according to the manufacturer guidelines. The results were interpreted according to the indications of the American Academy of Pediatrics, the National Institutes of Health, and the European Consensus Development Conference on Neonatal Hearing Screening. Out of the 8144 infants tested, 1507 (14.6% did not pass the 1st test, 477 (32.8% of these 1507 infants failed retesting, while 498 (33% patients were lost to follow-up. Only 152 (31.9% patients that failed retesting went to an audiologist. The audiologist evaluation revealed that 101 (66.4% patients presented with a mild-moderate or profound hearing loss according to the Bureau International of Audiophonologie standards, 44 (28.9% patients had otitis media, whereas 7 cases (4.7% had no hearing disorders. The overall unadjusted percentage of hearing loss was 1.24%, and the adjusted overall percentage was 1.85%. The chart review showed that jaundice, sepsis, prematurity, lung disease were more common among the affected patients. The high prevalence of childhood deafness in Palestine is of utmost importance and deserves immediate attention on the part of the Palestinian government. Meanwhile, Caritas Baby Hospital undertook to set up a newborn hearing screening unit utilizing the TEOAE method.
Kamenski, Gustav; Bendova, Jana; Fink, Waltraud; Sönnichsen, Andreas; Spiegel, Wolfgang; Zehetmayer, Sonja
Objectives Chronic obstructive pulmonary disease (COPD) as a multisystemic disease has a measurable and biologically explainable impact on the auditory function detectable in the laboratory. This study tries to clarify if COPD is also a significant and clinically relevant risk factor for hearing impairment detectable in the general practice setting. Design Retrospective matched cohort study with selection of patients diagnosed with COPD. Setting 12 general practices in Lower Austria. Participants Consecutive patients >35?years with a diagnosis of COPD who consulted 1 of 12 single-handed GPs in 2009 and 2010 were asked to participate. Those who agreed were individually 1:1 matched with controls according to age, sex, hypertension, diabetes, coronary heart disease and chronic heart failure. Main outcome measures Sensorineural hearing impairment as assessed by pure tone audiometry, answers of three questions concerning a self-perceived hearing problem, application of the whispered voice test and the score of the Hearing Inventory for the Elderly, Screening Version (HHIE-S). Results 194 patients (97 pairs of 194 cases and controls) with a mean age of 65.5 (SD 10.2) were tested. Univariate conditional logistic regression resulted in significant differences in the mean bone conduction hearing loss and in the total score of HHIE-S, in the multiple conditional regression model, only smoking (pCOPD and hearing impairment which, if found, would have allowed better management of patients with COPD. PMID:26586319
Alessandra Fioretti; Giorgia Peri; Alberto Eibenstein
We describe a case of a 67-year-old woman with severe disabling right-sided tinnitus, mild hyperacusis, and headache. The tinnitus was associated with sudden right hearing loss and vertigo, which occurred about 18 months before. Magnetic resonance imaging (MRI) resulted in normal anatomical structures of the cochlea and of the cranial nerves showing a partial empty sella syndrome with suprasellar cistern hernia. Angio-MR revealed a bilateral contact between the anterior-inferior cerebellar ar...
Taylor, Kyle R.; DeLuca, Adam P.; Shearer, A. Eliot; Hildebrand, Michael S.; Black-Ziegelbein, E Ann; Anand, V. Nikhil; Sloan, Christina M.; Eppsteiner, Robert W.; Scheetz, Todd E.; Huygen, Patrick L. M.; Richard J. H. Smith; Braun, Terry A; Casavant, Thomas L
Autosomal Dominant Nonsyndromic Hearing Loss (ADNSHL) is a common and often progressive sensory deficit. ADNSHL displays a high degree of genetic heterogeneity, and varying rates of progression. Accurate, comprehensive and cost-effective genetic testing facilitates genetic counseling and provides valuable prognostic information to affected individuals. In this paper, we describe the algorithm underlying AudioGene, a software system employing machine-learning techniques that utilizes phenotypi...
Popelá?, Ji?í; Rybalko, Natalia; Grécová, Jolana; Profant, Oliver; Syka, Josef
Shanghai : Chinese Academy for Science, 2006. s. 81-82. [The 2nd Shanghai International Conference on Physiological Biophysics-Audition and Vision 2006. 03.11.2006-07.11.2006, Shanghai] R&D Projects: GA ?R GA309/04/1074; GA MZd NR8113; GA MŠk LC554 Institutional research plan: CEZ:AV0Z50390512 Keywords : Hearing loss Subject RIV: FH - Neurology
Tan, Chang-qiang; GAO, XIA; Cai, Wen-jun; Qian, Xiao-yun; Lu, Ling; Huang, He
This study aimed to investigate the efficacy of gene therapy for treating autoimmune sensorineural hearing loss (ASHL) via local administration of a recombinant adenovirus vector containing the Fas ligand or interleukin IL-10 gene. Guinea pigs were divided into four groups, with different microinjections in the scala tympani. Group A were injected with FasL-EGFP, B with IL-10-EGFP, C with EGFP, and D with artificial perilymph. Seven days later, auditory brain-stem response (ABR) was tested, a...
Kale, Sushrut; Heinz, Michael G.
Recent perceptual studies suggest that listeners with sensorineural hearing loss (SNHL) have a reduced ability to use temporal fine-structure cues, whereas the effects of SNHL on temporal envelope cues are generally thought to be minimal. Several perceptual studies suggest that envelope coding may actually be enhanced following SNHL and that this effect may actually degrade listening in modulated maskers (e.g., competing talkers). The present study examined physiological effects of SNHL on en...
Diaz-Horta, Oscar; Duman, Duygu; Foster, Joseph; S?rmac?, Asl?; Gonzalez, Michael; Mahdieh, Nejat; Fotouhi, Nikou; Bonyadi, Mortaza; Cengiz, Filiz Ba?ak; Menendez, Ibis; Ulloa, Rick H.; Edwards, Yvonne J.K.; Züchner, Stephan; Blanton, Susan; Tekin, Mustafa
Identification of the pathogenic mutations underlying autosomal recessive nonsyndromic hearing loss (ARNSHL) is difficult, since causative mutations in 39 different genes have so far been reported. After excluding mutations in the most common ARNSHL gene, GJB2, via Sanger sequencing, we performed whole-exome sequencing (WES) in 30 individuals from 20 unrelated multiplex consanguineous families with ARNSHL. Agilent SureSelect Human All Exon 50 Mb kits and an Illumina Hiseq2000 instrument were ...
Canis, Martin; Heigl, Franz; Suckfuell, Markus
Fibrinogen/LDL apheresis has been proven to be effective in treatment of sudden sensorineural hearing loss (SSNH). This study is aimed to investigate if reduction of fibrinogen and serum LDL is also effective in patients with SSNH non-responding toward treatment with corticosteroids and plasmaexpanders.Remission rates of 217 patients suffering from SSHL were investigated after treatment with apheresis. All patients were non-responders after other therapies such as high doses of steroids or pl...
Kriksunov Leonid; Weinberger Jeffrey M; Adelman Cahtia; Sohmer Haim
Abstract Background The permanent hearing loss following exposure to intense noise can be due either to mechanical structural damage (tearing) caused directly by the noise or to metabolic (biochemical) damage resulting from the elevated levels of free radicals released during transduction of the sound overstimulation. Drugs which depress active cochlear mechanics (e.g. furosemide and salicylic acid) or anti-oxidants (which counteract the free radicals) are effective in reducing the threshold ...
Doherty, Dan; Chudley, Albert E.; Coghlan, Gail; Ishak, Gisele E.; Innes, A. Micheil; Lemire, Edmond G.; Rogers, R. Curtis; Mhanni, Aizeddin A.; Phelps, Ian G.; Jones, Steven J.M.; Zhan, Shing H.; Fejes, Anthony P.; Shahin, Hashem; Kanaan, Moien; Akay, Hatice
Autosomal-recessive inheritance, severe to profound sensorineural hearing loss, and partial agenesis of the corpus callosum are hallmarks of the clinically well-established Chudley-McCullough syndrome (CMS). Although not always reported in the literature, frontal polymicrogyria and gray matter heterotopia are uniformly present, whereas cerebellar dysplasia, ventriculomegaly, and arachnoid cysts are nearly invariant. Despite these striking brain malformations, individuals with CMS generally do...
Kim, Eunja; Son, Min-Ki; Kang, Chang-Ki; Lee, Yeong-Bae
Isolated bilateral deafness is a rare but possible symptom of vertebrobasilar ischemia, primarily due to occlusion of the anterior inferior cerebellar arteries or their branch, the internal auditory artery. We reported on uncommon case of sudden bilateral sensorineural hearing loss without typical neurological symptoms resulting from vertebrobasilar ischemia. We performed the available examinations, including otoscopy, laboratory tests, and pure tone audiogram, however we were not able to ide...
Müderris, Togay; Berçin, Sami; Sevil, Ergün; Kiri?, Muzaffer
Abstract Acquired external auditory canal atresia is an uncommon entity which can arise from a number of different causes including infection, trauma, neoplasia, inflammation and radiotherapy. Posttraumatic atresias are extremely rare, only 10% of atresias are attributed to trauma in most of the series. The presence of canal atresia causes associated morbidity, patients generally suffer from conductive hearing loss and persistent otorrhea. Surgery is the treatment of choice for posttraumatic ...
McClelland, R. J.; Watson, D. R.; Lawless, V.; Houston, H. G.; Adams, D.
OBJECTIVE--To establish the reliability and effectiveness of screening for hearing loss by brainstem auditory evoked potential testing in high risk neonates. DESIGN--Seven year investigation of newborn babies admitted to a special care baby unit and monitored through a regional children's audiology unit. SETTING--Special care baby unit and children's audiology department, Belfast. SUBJECTS--405 neonates admitted to the baby unit, during 1 October 1982 to 31 March 1987. MAIN OUTCOME MEASURES--...
Feng, Hao; Pyykkö, Ilmari; Zou, Jing
Increased application of silver nanoparticles (AgNPs) has raised concerns on their potential adverse effects on human health. However, the precise toxicological mechanisms are not known in detail. The current study hypothesized that AgNPs induced glycosaminoglycan accumulation in the basement membrane that associated with the up-regulation of its component hyaluronic acid, known as a hydrophilic molecule of binding and retaining water, and caused toxicities in the kidney and cochlea. Rats administered AgNPs through either intravenous or intratympanic injection were observed at different time points after exposure. The concentrations of creatinine and urea in the serum were elevated remarkably, and proteins leaked into the urine were increased. A significant hearing loss over a broad range of frequencies was indicated. AgNP exposure induced glycosaminoglycan accumulation and hyaluronic acid up-regulation in the basement membrane. Abundant apoptotic cell death was demonstrated in the AgNP-exposed organs. Our results suggested that glycosaminoglycan accumulation associated with the up-regulation of hyaluronic acid was involved in the toxicities of kidney and cochlea caused by AgNPs. PMID:25082176
Fayez, Bahmad Jr.; Carolina Sousa Alves, Costa; Marina Santos, Teixeira; Jairo de, Barros Filho; Lucas Moura, Viana; Jan, Marshall.
Full Text Available Introdução: A Síndrome de Alstrom é uma doença muito rara, causada pela mutação no gene Obesidade infantil; ALMS1, que apresenta uma degeneração progressiva das funções sensoriais, resultando em de-Diabetes mellitus tipo 2; ficiências visuais e auditivas, além de distúrbios metabólicos como obesid [...] ade na infância, hipe-Retinite pigmentosa rinsulinemia e diabetes tipo II. Objetivo: Apresentar o perfil audiométrico de dois irmãos da mesma família afetados pela Síndrome de Alström. Método: Estudo prospectivo, analítico descritivo, os pacientes afetados foram submetidos a um questionário previamente testado, audiometria tonal e vocal seriadas, análise de emissões otoacústicas, e de respostas de potencial evocado auditivo de tronco encefálico, além de análise genético-molecular para comprovação diagnóstica. Resultados: Ambos os pacientes apresentaram perda auditiva bilateral com o início na infância e progressão lenta para perda auditiva neurosensorial severa no primeiro caso e, profunda, no segundo. As emissões otoacústicas estavam ausentes, e o potencial evocado auditivo de tronco encefálico estava normal em ambos os pacientes, bilateralmente. Conclusão: A Síndrome de Alström apresenta início precoce de perda auditiva neurossensorial, antes da adolescência, 10 a 20 anos para desenvolver perda auditiva severa a profunda. A lesão auditiva é essencialmente coclear, de acordo com os resultados dos testes de emissões otoacústicas e de potenciais evocados auditivos de tronco encefálico. Abstract in english Introduction: Alström Syndrome is a rare disease caused by mutations in ALMS1 gene. It is characterized by a progressive degeneration of sensory functions, resulting in visual and audiological impairment, as well as metabolic disturbances such as childhood obesity, hyperinsulinemia, and diabetes me [...] llitus type 2. Objective: To report and discuss the genetic and audiological findings in two siblings with Alström syndrome. Methods: This was a prospective, analytical and descriptive study, using questionnaires, serial audiograms, otoacoustic emissions, and auditory brainstem response analysis, as well as molecular genetic analysis. Results: Both patients presented childhood-onset bilateral sensorineural hearing loss, which progressed to moderate impairment in the first case and severe hearing loss in the second. Otoacoustic emissions were absent, and auditory brainstem responses were bilaterally normal in both cases. Conclusion: In the present patients, Alström Syndrome began with a neurosensory hearing loss in early childhood that progressed to a profound loss in ten to twenty years. The auditory lesions were cochlear in origen according to the otoacoustic emissions and auditory brainstem responses.
... Hearing loss can have a negative effect on communication, relationships, school/work performance, and emotional well-being. However, hearing loss doesn't have to restrict your daily activities. Properly fitted hearing ... help improve communication. Hearing aids for both ears are typically the ...
Bianchi, Federica; Santurette, Sébastien
Recent physiological studies in animals showed that noise-induced sensorineural hearing loss (SNHL) increased the amplitude of envelope coding in single auditory-nerve fibers. The present study investigated whether SNHL in human listeners was associated with enhanced temporal envelope coding, whether this enhancement affected pitch discrimination performance, and whether loss of compression following SNHL was a potential factor in envelope coding enhancement. Envelope processing was assessed in normal-hearing (NH) and hearing-impaired (HI) listeners in a behavioral amplitude-modulation detection task. Fundamental frequency difference limens (F0DLs) were obtained in the same listeners for complex tones with varying harmonic resolvability. Basilar-membrane input/output functions were measured to assess individual compression ratios. For NH listeners, F0DLs decreased with increasing harmonic resolvability. For the unresolved conditions, all five HI listeners performed as good as or better than NH listeners with matching musical experience. Two HI listeners showed lower amplitude-modulation detection thresholds than NH listeners for low modulation rates, and one of these listeners also showed a loss of cochlear compression. Overall, these findings suggest that some HI listeners may benefit from an enhancement of temporal envelope coding in pitch discrimination of unresolved complex tones, and that this enhancement may be also ascribed to a reduction of cochlear compression following SNHL. © 2015 Acoustical Society of America
Choudhury, Baishakhi; Adunka, Oliver F.; Awan, Omar; Pike, John Maxwell; Buchman, Craig A.; Fitzpatrick, Douglas C.
Hypothesis Flexible electrode interaction with intracochlear structures in a noise-damaged region of the cochlea can lead to measureable electrophysiologic changes. Background An emerging goal in cochlear implantation is preservation of residual hearing subsequently allowing for combined electric and acoustic stimulation (EAS). However, residual hearing is at least partially lost in most patients as a result of electrode insertion. A gerbil model was used to examine changes to acoustically evoked cochlear potentials during simulated cochlear implantation. Methods Gerbils were partially deafened by noise exposure to mimic residual hearing in human cochlear implant candidates. After one month, round window (RW) and intracochlear recordings during flexible electrode insertion were made in response to 1 kHz tone burst stimuli at 80 dB SPL. After the insertion the cochleas were histologically examined for hair cell loss due to the noise exposure and trauma due to the electrode insertion. Results Anatomical damage from the flexible electrode was not observable in most cases. However, insertions caused response declines that were on average greater than the controls, although some losses were similar to the controls. The CM was more sensitive than the CAP for detecting cochlear disturbance. Conclusions Because response reductions occurred in the absence of anatomical damage, disturbances in the fluid at the base appear to affect responses from the apex. The losses were less than in previous experiments where the basilar membrane was penetrated. PMID:23988997
Joshua S. Shimony
Full Text Available Objective: Language acquisition was assumed to proceed normally in children with unilateral hearing loss (UHL since they have one functioning ear. However, children with UHL score poorly on speech-language tests and have higher rates of educational problems compared to normal hearing (NH peers. Diffusion tensor imaging (DTI is an imaging modality used to measure microstructural integrity of brain white matter. The purpose of this pilot study was to investigate differences in fractional anisotropy (FA and mean diffusivity (MD in hearing- and non-hearing-related structures in the brain between children with UHL and their NH siblings. Study Design: Prospective observational cohortSetting: Academic medical center.Subjects and Methods: 61 children were recruited, tested and imaged. 29 children with severe-to-profound UHL were compared to 20 siblings with NH using IQ and oral language testing, and MRI with DTI. 12 children had inadequate MRI data. Parents provided demographic data and indicated whether children had a need for an individualized educational program (IEP or speech therapy (ST. DTI parameters were measured in auditory and non-auditory regions of interest (ROIs. Between-group comparisons were evaluated with non-parametric tests. Results: Lower FA of left lateral lemniscus was observed for children with UHL compared to their NH siblings, as well as trends towards differences in other auditory and nonauditory regions. Correlation analyses showed associations between several DTI parameters and outcomes in children with UHL. Regression analyses revealed relationships between educational outcome variables and several DTI parameters, which may provide clinically useful information for guidance of speech therapy. Discussion/Conclusion: White matter microstructural patterns in several brain regions are preserved despite unilateral rather than bilateral auditory input which contrasts with findings in patients with bilateral hearing loss.
Nakajima, H H; Pisano, D V; Röösli, C; Hamade, MA; Merchant , G R; Mahfoud, L; Halpin, C F; Rosowski, J.J.; Merchant, S N
OBJECTIVE:: The goal of the present study was to investigate the clinical utility of measurements of ear-canal reflectance (ECR) in a population of patients with conductive hearing loss in the presence of an intact, healthy tympanic membrane and an aerated middle ear. We also sought to compare the diagnostic accuracy of umbo velocity (VU) measurements and measurements of ECR in the same group of patients. DESIGN:: This prospective study comprised 31 adult patients with conductive hearing loss...
Kaerlev, Linda; Jensen, Anker; Nielsen, Per Sabro; Olsen, Jørn; Hannerz, Harald; Tuchsen, Finn
Aims: Noise-induced hearing loss (NIHL) is a leading occupational disease and some seafarers and fishermen may be at high risk. We present here standardized hospital contact ratios (SHCRs) for hearing loss among Danish seafarers and fishermen. Materials and Methods: Cohorts of all Danish seafarers registered by the Danish Maritime Authority (DMA) and fishermen retrieved from a 1989-1998 pension registry were linked to the nationwide Occupational Hospitalisation Registry (OHR) with follow-up for ...
Mollasadeghi, Abolfazl; Mirmohammadi, Seyyed Jalil; Mehrparvar, Amir Houshang; Davari, Mohammad Hossein; Shokouh, Pedram; Mostaghaci, Mehrdad; Baradaranfar, Mohammad Hossein; Bahaloo, Maryam
Background. Several remedial modalities for the treatment of tinnitus have been proposed, but an effective standard treatment is still to be confirmed. In the present study, we aimed to evaluate the effect of low-level laser therapy on tinnitus accompanied by noise-induced hearing loss. Methods. This was a double-blind randomized clinical trial on subjects suffering from tinnitus accompanied by noise-induced hearing loss. The study intervention was 20 sessions of low-level laser therapy every ot...
Masoud Motalebi Kashani
Full Text Available Background and Objectives: Oxidative stress due to free radicals formation plays an important role in noise-induced hearing loss (NIHL. Many hypotheses have been proposed regarding the biochemical prevention of this complication. This study was performed with the purpose of determining the preventive effect of N-acetylcysteine (NAC administration, as an antioxidant agent, on NIHL in Rabbit.Methods: In an experimental study, 24 adult white male rabbits were divided into four groups, including: 1 control, 2 noise exposure (100dB octave band noise centered at 4000Hz for 40h, 3 noise exposure plus NAC administration (325mg/kg, daily ip injection, and 4 no exposure and NAC administration. Audiometric test of rabbits was assessed by auditory brainstem response (ABR technique in three stages. The Kruskal-Wallis and Mann-Whitney tests were used to compare the groups, and a p<0.05 was considered significant.Results: The mean ABR threshold shift for the noise exposure plus NAC administration group, 1 hour after exposure at 1, 2, 4 and 8kHz frequencies were, respectively, 16.66±1.63, 21.66±1.75, 33.5±2.34, and 39.33±2.25dB. These values were significantly less than the same values in the noise exposure group.Conclusion: The results of this study showed that NAC can provide a proper protective effect against hearing loss resulting from noise exposure.
De-Villegas Carlos A; Burgoa Claudia V; Salazar Jorge; Salas Ariel A; Quevedo Valeria; Soliz Amed
Abstract Background Weight loss of greater than 7% from birth weight indicates possible feeding problems. Inadequate oral intake causes weight loss and increases the bilirubin enterohepatic circulation. The objective of this study was to describe the association between total serum bilirubin (TSB) levels and weight loss in healthy term infants readmitted for hyperbilirubinemia after birth hospitalization. Methods We reviewed medical records of breastfed term infants who received phototherapy ...
V. M. Marugán Isabel
Full Text Available Introduction and objectives: Our aim is to check the program of sifted universally of hearing lossrealized in our Hospital from 2003, its acceptance and fulfillment, its results as well as to establish itspossible points of improvement and update. Methods: During the year 2003 and 2004 there wasrealized sifted universally of the newborn children (NB in our Hospital with evoked otoacusticemissions and accomplishment of auditory potentials to those children with factors of risk or whosewere not overcoming the first phase. From 2005 a program is restored of sifted universally by auditoryautomated potentials. Results: The coverage of the sifted one ranges between 97,7 % of the year 2003and 99,4 % of 2009. The first reason of not accomplishment of the sifted one was the movement toanother Hospital. The first test of sifted was realized before the discharge to less than 95 % of thenewborns but the second test before 2 months near 100 %. They go on to diagnosis among 0,1 % and0,2 % of the RN. 3 cases have been diagnosed of hearing loss. Conclusions: We distinguish the coverageof the program always major from 95 % and his minor rejection of 1 %. The accomplishment of 5 % ofthe first tests after the discharge does not reverberate in the precocious diagnosis, with the second testbefore 2 º month and derivation before the third one. We highlight the low percentage of childrenderived to diagnosis and of hearing loss confirmed, that we believe due to the movement neonatal tothe tertiary Hospital of the patients of major risk of hearing loss.
ZHENG, QING YIN; Ding, Dalian; Yu, Heping; Salvi, Richard J.; Johnson, Kenneth R.
The ahl locus, shown to be a strain-specific Cdh23 dimorphism, contributes to age-related hearing loss in many inbred mouse strains. A/J mice begin to lose hearing by four weeks of age, much earlier than C57BL/6J (B6) mice, although both strains have the same Cdh23ahl variant. Here, we use recombinant inbred strains, chromosome substitution strains, and a linkage backcross to map a locus on distal Chromosome 10, designated ahl4, that contributes to the early-onset hearing loss of A/J mice. Co...
Choi, Yoon-Hyeong; Hu, Howard; Mukherjee, Bhramar; Miller, Josef; Park, Sung Kyun
Background: Although cadmium and lead are known risk factors for hearing loss in animal models, few epidemiologic studies have been conducted on their associations with hearing ability in the general population.
Halevi-Katz, Dana N; Yaakobi, Erez; Putter-Katz, Hanna
Noise-induced hearing loss (NIHL) has been extensively studied in industrial work environments. With the advent of new technologies, loud music has been increasingly affecting listeners outside of the industrial setting. Most research on the effects of music and hearing loss has focused on classical musicians. The purpose of the current study was to examine the relationship between the amount of experience a professional pop/rock/jazz musician has and objective and subjective variables of the musician's hearing loss. This study also examined professional pop/rock/jazz musicians' use of hearing protection devices in relation to the extent of their exposure to amplified music. Forty-four pop/rock/jazz musicians were interviewed using the Pop/Rock/Jazz Musician's Questionnaire (PRJMQ) in order to obtain self-reported symptoms of tinnitus and hyperacusis. Forty-two of the subjects were also tested for air-conduction hearing thresholds in the frequency range of 1-8 kHz. Results show that the extent of professional pop/rock/jazz musicians' exposure to amplified music was related to both objective and subjective variables of hearing loss: Greater musical experience was positively linked to higher hearing thresholds in the frequency range of 3-6 kHz and to the subjective symptom of tinnitus. Weekly hours playing were found to have a greater effect on hearing loss in comparison to years playing. Use of hearing protection was not linked to the extent of exposure to amplified music. It is recommended that further research be conducted with a larger sample, in order to gain a greater understanding of the detrimental effects of hours playing versus years playing. PMID:25913555
Full Text Available Sensorineural hearing loss (SNHL is a common clinical condition resulting from dysfunction in one or more parts in the auditory pathway between the inner ear and auditory cortex. Despite the prevalence of SNHL, little is known about its etiopathology, although several mechanisms have been postulated including ischemia, viral infection or reactivation, and microtrauma. Immune-mediated inner ear disease has been introduced and accepted as one SNHL pathophysiology; it responds to immunosuppressive therapy and is one of the few reversible forms of bilateral SNHL. The concept of immune-mediated inner ear disease is straightforward and comprehensible, but criteria for clinical diagnosis and the precise mechanism of hearing loss have not been determined. Moreover, the therapeutic mechanisms of corticosteroids are unclear, leading to several misconceptions by both clinicians and investigators concerning corticosteroid therapy. This review addresses our current understanding of the immune system in the inner ear and its involvement in the pathophysiology in SNHL. Treatment of SNHL, including immune-mediated inner ear disorder, will be discussed with a focus on the immune mechanism and immunocompetent cells as therapeutic targets. Finally, possible interventions modulating the immune system in the inner ear to repair the tissue organization and improve hearing in patients with SNHL will be discussed. Tissue macrophages in the inner ear appear to be a potential target for modulating the immune response in the inner ear in the pathophysiology of SNHL.
Maria Renata, José; Maria Fernanda Capoani Garcia, Mondelli; Mariza Ribeiro, Feniman; Simone Aparecida, Lopes-Herrera.
Full Text Available Introduction Childhood is a critical period for language development and maturation of the central auditory system. Unilateral hearing loss (UHL) is considered a minimal impairment, and little is discussed regarding its impact on the development of language, communication, and school performance. [...] Objectives A bibliographical survey of scientific articles published from 2001 to 2011 was performed to verify which language disorders can occur in children with UHL and which tests were performed to identify them. Data Synthesis Three databases were used: PubMed, Lilacs, and The Cochrane Library. As inclusion criteria, the articles should have samples of children with UHL, without other impairments, aged between 3 months and 12 years, and reference to language tests applied in this population. Out of 236 papers initially selected, only 5 met the inclusion criteria. In the articles studied, 12 tests were used for language assessment in children with UHL, out of which 9 were directed toward expressive language, and 3 toward receptive language. Children with UHL demonstrated lower scores on receptive and expressive language tests when compared with children with normal hearing. However, they obtained better scores on expressive language tests than children with bilateral hearing loss. Conclusion The findings of this survey showed that only a small number of studies used language tests in children with UHL or addressed language alterations resulting from this type of impairment. Therefore we emphasize the importance of investments in new studies on this subject to provide better explanations related to language difficulties presented by children with UHL.
Clícia Adriana S., Maia; Carlos Alberto H. de, Campos.
Full Text Available Os pacientes com diabetes mellitus freqüentemente apresentam sintomas como tontura, zumbidos e hipoacusia. Via de regra, a perda auditiva é do tipo sensorioneural, confundindo-se, por vezes, com presbiacusia, principalmente por ocorrer em pacientes acima dos 40 anos de idade. A angiopatia e a neurop [...] atia causadas pelo diabetes mellitus têm sido considerados importantes fatores responsáveis pelas manifestações vestibulococleares nesses pacientes. Porém, existe controvérsia no que se refere à etiopatogênese da perda auditiva, sendo que parte dos autores advoga que ela ocorre devido à neuropatia, outra parte à angiopatia, e outra, ainda, à associação das duas. Porém há também os que entendem que o diabetes mellitus e a perda auditiva poderiam ser partes integrantes de uma síndrome genética e não dependentes entre si. Realizamos uma extensa revisão bibliográfica procurando analisar se há relação "causa e efeito" entre o diabetes mellitus e a perda auditiva. Pudemos observar que, apesar do grande número de estudos realizados, a controvérsia ainda é grande, sendo que novas perspectivas, como no campo da genética, estão sendo estudadas, mostrando que novos rumos podem ser tomados para se chegar à conclusão do tema. Abstract in english Patients with diabetes mellitus often show symptoms such as dizziness, tinnitus, and hearing impairment. In general, hearing loss is sensorineural, which is sometimes confused with presbycusis, mainly because it develops in patients older than 40 years of age. Angiopathy and neuropathy caused by dia [...] betes mellitus have been considered important factors for the vestibular-cochlear disorders found in these patients. However, there is controversy regarding the etiopathogenesis of hearing loss, as some researchers support that it develops due to neuropathy, others say it is due to angiopathy, or even a combination of both. Yet, some researchers believe diabetes mellitus and hearing loss are part of a genetic syndrome. We have conducted an extensive bibliographic review to determine whether there is cause-effect relationship between diabetes mellitus and hearing loss. We were able to verify that, despite the large number of studies performed, there is still a great deal of controversy, and new approaches are being studied, for example in the field of genetics, which shows that new paths can be followed to reach a conclusion on this issue.
Kim Matthew Kiely
Full Text Available Background: The association between dual sensory loss (DSL and mental health has been well established. However, most studies have relied on self-report data and lacked measures that would enable researchers to examine causal pathways between DSL and depression. This study seeks to extend this research by examining the effects of DSL on mental health, and identify factors that explain the longitudinal associations between sensory loss and depressive symptoms. Methods: Piecewise linear-mixed models were used to analyse 16-years of longitudinal data collected on up to five occasions from 1611 adults (51% men aged between 65 and 103 years. Depressive symptoms were assessed by the Centre for Epidemiological Studies Depression (CES-D. Vision loss (VL was defined by corrected visual acuity greater than 0.3 logMAR in the better eye, blindness or glaucoma. Hearing loss (HL was defined by pure tone average (PTA greater than 25 dB in the better hearing ear. Analyses were adjusted for socio-demographics, medical conditions, lifestyle behaviours, Activities of Daily Living (ADLs, cognitive function, and social engagement. Results: Unadjusted models indicated that higher levels of depressive symptoms were associated with HL (B=1.16, SE=0.33 and DSL (B=2.15, SE=0.39 but not VL. Greater rates of change in depressive symptoms were also evident after the onset of HL (B=0.16, SE=0.06, p
Brors, D. [Univ. Hospital Wuerzburg (Germany). Dept. of Oto-Rhino-Laryngology, Head- and Neck-Surgery; Dept. of Ear, Nose and Throat Diseases, Head, Neck and Facial Plastic Surgery, Klinikum Fulda (Germany); Schaefers, M. [Dept. of Neurology, University Hospital Wuerzburg (Germany); Schick, B.; Draf, W. [Dept. of Ear, Nose and Throat Diseases, Head, Neck and Facial Plastic Surgery, Klinikum Fulda (Germany); Dazert, S. [Univ. Hospital Wuerzburg (Germany). Dept. of Oto-Rhino-Laryngology, Head- and Neck-Surgery; Kahle, G. [Department of Radiology, Hospital Fulda (Germany)
Sinus thrombosis has rarely been associated with closed head injury; more often, thrombosis of the sigmoid or transverse sinus is caused by otogenic inflammations or tumours, or occurs during pregnancy. Symptoms are frequently vague, while untreated thrombus progression may be fatal due to venous congestion and infarction. We report a 32-year-old man presenting with right hearing loss, tinnitus and headache 2 days after a closed head injury. Neurological examination showed no additional abnormality. The EEG showed focal bifrontal slowing. CT revealed a fracture of the occipital bone. MRI and MRA demonstrated complete thrombosis of the right sigmoid and transverse sinuses. After 2 weeks of intravenous heparin therapy followed by warfarin, the patient's hearing improved and MRI and MRA showed complete recanalisation of the sigmoid and transverse sinuses. Venous sinus thrombosis can be an undetected sequel to head injury. Appropriate imaging studies should be carried out to enable therapy to be started as soon as possible. (orig.)
Sinus thrombosis has rarely been associated with closed head injury; more often, thrombosis of the sigmoid or transverse sinus is caused by otogenic inflammations or tumours, or occurs during pregnancy. Symptoms are frequently vague, while untreated thrombus progression may be fatal due to venous congestion and infarction. We report a 32-year-old man presenting with right hearing loss, tinnitus and headache 2 days after a closed head injury. Neurological examination showed no additional abnormality. The EEG showed focal bifrontal slowing. CT revealed a fracture of the occipital bone. MRI and MRA demonstrated complete thrombosis of the right sigmoid and transverse sinuses. After 2 weeks of intravenous heparin therapy followed by warfarin, the patient's hearing improved and MRI and MRA showed complete recanalisation of the sigmoid and transverse sinuses. Venous sinus thrombosis can be an undetected sequel to head injury. Appropriate imaging studies should be carried out to enable therapy to be started as soon as possible. (orig.)
Modern-day high performance aircraft are more powerful, more efficient, and, unfortunately, frequently produce high noise levels, resulting in noise-induced hearing loss (NIHL) in military aircrew. Military pilots are required to perform many flight duties correctly in the midst of many challenges that may affect mission completion as well as aircraft and aircrew safety. NIHL can interfere with successful mission completion. NIHL may also require aircrew to be downgraded from flying duties, with the incumbent re-training costs for downgraded personnel and training costs for new/replacement aircrew. As it is not possible to control the source of the noise without compromising the efficiency of the engine and aircraft, protecting the aircrew from hazards of excessive noise and treating NIHL are of extreme importance. In this article we discuss various personal hearing protection devices and their efficacy, and pharmacological agents for prevention and management of NIHL. PMID:24459798
Full Text Available Background: Noise induced hearing loss (NIHL is the highest reported occupational disease among industrial workers but there is scarcity of data on disease burden in Malaysia. This study estimated the risks and burden of NIHL in manufacturing industries in Malaysia.Methods: This cross-sectional industrial survey was conducted by interviewing OSH practitioners at 26 industries categorized as food, tobacco, textile, wearing apparel, wood products except furniture, paper, refined petroleum, chemicals, non-metallic mineral, basic metal, fabricated metal, motor vehicle parts. The catchment population is imputed based on stratified sampling design involving 60% of workers diagnosed with NIHL.Results: A total of 18 industries exposed to noise level of 86-90dBA and 8 industries at more than 91dBA were identified. All industries provide regular awareness training and hearing protection device to their workers but none of them implement attenuation, majority of them (81% conduct onsite audiometric test annually. In overall, the risk of NIHL and incidence per 100,000 manufacturing workers projected is 8% (139 new cases, the highest risk and incidence is 32% (26 in motor vehicle parts industry; followed by 23% (1140 new cases in tobacco industry and 23% (269 new cases in fabricated metal industry. Male workers (89% were exposed to a greater risk compared to female (11%. It was estimated that 103,000 workers were potentially affected by NIHL in Malaysia.Conclusion: NIHL is a major burden among industrial workers in Malaysia. Implementation of effective hearing conservation program and self-enforcement of noise regulations by the employer could potentially reduce the burden. Keywords: Noise, Hearing loss, Manufacturing, Malaysia
Henshaw, Helen; McCormack, Abby; Ferguson, Melanie A.
Hearing aid intervention typically occurs after significant delay, or not at all, resulting in an unmet need for many people with hearing loss. Computer-based auditory training (CBAT) may provide generalized benefits to real-world listening, particularly in adverse listening conditions, and can be conveniently delivered in the home environment. Yet as with any intervention, adherence to CBAT is critical to its success. The main aim of this investigation was to explore motivations for uptake, engagement and adherence with home-delivered CBAT in a randomized controlled trial of adults with mild sensorineural hearing loss (SNHL), with a view to informing future CBAT development. A secondary aim examined perceived benefits of CBAT. Participants (n = 44, 50–74 years olds with mild SNHL who did not have hearing aids) completed a 4-week program of phoneme discrimination CBAT at home. Participants' experiences of CBAT were captured using a post-training questionnaire (n = 44) and two focus groups (n = 5 per group). A mixed-methods approach examined participants' experiences with the intervention, the usability and desirability of the CBAT software, and participants' motivations for CBAT uptake, engagement and adherence. Self-Determination Theory (SDT) was used as a theoretical framework for the interpretation of results. Participants found the CBAT intervention easy to use, interesting and enjoyable. Initial participation in the study was associated with extrinsic motivation (e.g., hearing difficulties). Engagement and adherence with CBAT was influenced by intrinsic (e.g., a desire to achieve higher scores), and extrinsic (e.g., to help others with hearing loss) motivations. Perceived post-training benefits included better concentration and attention leading to improved listening. CBAT also prompted further help-seeking behaviors for some individuals. We see this as an important first-step for informing future theory-driven development of effective CBAT interventions. PMID:26300796
Maria F. P. de, Carvalho; Fernando A. Quintanilha, Ribeiro.
Full Text Available A deficiência auditiva é sintoma comum que pode apresentar várias etiologias, entre elas as causadas por alterações genéticas. As mutações genéticas podem ocorrer em genes nucleares e mitocondriais. A mitocôndria, uma organela intracelular, tem o seu próprio genoma (DNA), que é uma molécula circular [...] e é transmitido exclusivamente pela mãe. As mutações do DNA mitocondrial são transmitidas pela linhagem materna, mas podem ocorrer mutações espontâneas. O fenótipo, ou expressão clínica, da mutação mitocondrial vai depender da quantidade de DNA mitocondrial mutante existente na célula, situação conhecida como heteroplasmia. A mitocôndria tem a função de disponibilizar energia para as células sob a forma de ATP (trifosfato de adenosina). Os órgãos que requerem grande quantidade de energia são mais comumente acometidos em casos de mutações do DNA mitocondrial, como células nervosas, musculares, endócrinas, ópticas e auditivas. Como a cóclea é grande consumidora de energia, uma mutação no DNA mitocondrial de células ciliadas causa deficiência auditiva do tipo neurossensorial, bilateral, simétrica e progressiva. As deficiências auditivas causadas por mutações no DNA mitocondrial correspondem a 0,5% a 1% de todas as deficiências auditivas de origem genética. Foi realizada uma extensa revisão bibliográfica, a fim de estudar as deficiências auditivas causadas por alterações no DNA mitocondrial. A deficiência auditiva pode se apresentar na forma isolada (forma não sindrômica), como nos casos de hiper-sensibilidade aos antibióticos aminoglicosídeos e presbiacusia, ou associada a outras doenças (forma sindrômica), como na síndrome de Kearns-Sayre e diabete e surdez de herança materna. Abstract in english Hearing loss is a common symptom that may be manifested by many etiologies and it is frequently associated to genetic problems. Genetic mutations may occur in nuclear or mitochondrial genes. Mitochondria are intracellular organelles that have their own genome (DNA); mitochondrial DNA is from exclusi [...] ve maternal inheritance. Although mitochondrial DNA mutations derive from maternal inheritance, spontaneous mutations may also occur. The phenotype is the clinical expression of a mitochondrial mutation and depends on the amount of mutant mitochondrial DNA contained in the cell. This phenomenon is known as heteroplasmy. The mitochondria provide energy to the cells by releasing ATP; thus, the greater the amount of energy required by the cell, the more likely it is to be affected by mitochondrial DNA mutations. Examples of high metabolism cells are nervous system cells, muscle cells, endocrine cells, optical and auditory cells. The cochlea has great energy turnover and mitochondrial DNA mutations of the hair cells will cause sensorineural hearing loss, which is normally bilateral, symmetrical and progressive. Hearing loss secondary to mitochondrial DNA mutations comprises 0.5 to 1% of all genetic hearing losses. Based on the literature review, it may be observed that hearing loss secondary to mitochondrial DNA mutations manifest in two distinct forms: isolated hearing loss (nonsyndromic), as in aminoglycoside hypersensitivity and presbyacusis, or associated to other diseases in a syndrome, such as Kearns-Sayre syndrome and maternally inherited diabetes and deafness.
Maria F. P. de Carvalho
Full Text Available A deficiência auditiva é sintoma comum que pode apresentar várias etiologias, entre elas as causadas por alterações genéticas. As mutações genéticas podem ocorrer em genes nucleares e mitocondriais. A mitocôndria, uma organela intracelular, tem o seu próprio genoma (DNA, que é uma molécula circular e é transmitido exclusivamente pela mãe. As mutações do DNA mitocondrial são transmitidas pela linhagem materna, mas podem ocorrer mutações espontâneas. O fenótipo, ou expressão clínica, da mutação mitocondrial vai depender da quantidade de DNA mitocondrial mutante existente na célula, situação conhecida como heteroplasmia. A mitocôndria tem a função de disponibilizar energia para as células sob a forma de ATP (trifosfato de adenosina. Os órgãos que requerem grande quantidade de energia são mais comumente acometidos em casos de mutações do DNA mitocondrial, como células nervosas, musculares, endócrinas, ópticas e auditivas. Como a cóclea é grande consumidora de energia, uma mutação no DNA mitocondrial de células ciliadas causa deficiência auditiva do tipo neurossensorial, bilateral, simétrica e progressiva. As deficiências auditivas causadas por mutações no DNA mitocondrial correspondem a 0,5% a 1% de todas as deficiências auditivas de origem genética. Foi realizada uma extensa revisão bibliográfica, a fim de estudar as deficiências auditivas causadas por alterações no DNA mitocondrial. A deficiência auditiva pode se apresentar na forma isolada (forma não sindrômica, como nos casos de hiper-sensibilidade aos antibióticos aminoglicosídeos e presbiacusia, ou associada a outras doenças (forma sindrômica, como na síndrome de Kearns-Sayre e diabete e surdez de herança materna.Hearing loss is a common symptom that may be manifested by many etiologies and it is frequently associated to genetic problems. Genetic mutations may occur in nuclear or mitochondrial genes. Mitochondria are intracellular organelles that have their own genome (DNA; mitochondrial DNA is from exclusive maternal inheritance. Although mitochondrial DNA mutations derive from maternal inheritance, spontaneous mutations may also occur. The phenotype is the clinical expression of a mitochondrial mutation and depends on the amount of mutant mitochondrial DNA contained in the cell. This phenomenon is known as heteroplasmy. The mitochondria provide energy to the cells by releasing ATP; thus, the greater the amount of energy required by the cell, the more likely it is to be affected by mitochondrial DNA mutations. Examples of high metabolism cells are nervous system cells, muscle cells, endocrine cells, optical and auditory cells. The cochlea has great energy turnover and mitochondrial DNA mutations of the hair cells will cause sensorineural hearing loss, which is normally bilateral, symmetrical and progressive. Hearing loss secondary to mitochondrial DNA mutations comprises 0.5 to 1% of all genetic hearing losses. Based on the literature review, it may be observed that hearing loss secondary to mitochondrial DNA mutations manifest in two distinct forms: isolated hearing loss (nonsyndromic, as in aminoglycoside hypersensitivity and presbyacusis, or associated to other diseases in a syndrome, such as Kearns-Sayre syndrome and maternally inherited diabetes and deafness.
Effective management of water supply systems consists in supplying adequate quantities of clean water to the population. Detailed pilot studies of water distribution systems were carried out in 9 cities in India during 1971-81 to establish the feasibility of a programme of assessment, detection, and control of water losses from supply systems. A cost-benefit analysis was carried out. Water losses from mains and service pipes in the areas studied amounted to 20-35% of the total flow in the sys...
Full Text Available This study presents the treatment of 68 children with secretory otitis media. Children underwent adenoid vegetations, nasal speech, conductive hearing loss, ventilation disturbance in Eustachian tube. In all children adenoidectomy was indicated.38 boys and 30 girls at the age of 3-17 were divided in two main groups: * 29 children without hypertrophic (enlarged adenoids, * 39 children with enlarged (hypertrophic adenoids.The surgical treatment included insertion of ventilation tubes and adenoidectomy where there where hypertrophic adenoids.Clinical material was analyzed according to hearing threshold, hearing level, middle ear condition estimated by pure tone audiometry and tympanometry before and after treatment. Data concerning both groups were compared.The results indicated that adenoidectomy combined with the ventilation tubes facilitates secretory otitis media heeling as well as decrease of hearing impairments. That enables prompt restoration of the hearing function as an important precondition for development of the language, social, emotional and academic development of children.
Pollak, Agnieszka; Mueller-Malesinska, Malgorzata; Lechowicz, Urszula; Skorka, Agata; Korniszewski, Lech; Sobczyk-Kopciol, Agnieszka; Waskiewicz, Anna; Broda, Grazyna; Iwanicka-Pronicka, Katarzyna; Oldak, Monika; Skarzynski, Henryk; P?oski, Rafa?
Hearing impairment (HI) is the most common sensory handicap. Congenital HI often has a genetic basis, whereas the etiology of nonsyndromic postlingual HI (npHI) usually remains unidentified. Our purpose was to test whether the MTHFR C677T (rs1801133) polymorphism affecting folate metabolism is associated with the occurrence or severity of npHI. We studied rs1801133 genotypes in 647 npHI patients (age <40, sudden sensorineural loss excluded, HI characterized as mean of better ear hearing thresholds for 0.5-8 kHz) and 3273 adult controls from the background population. Genotype distribution among patients and controls was similar, but among male cases (n = 302) we found a dose-dependent correlation of MTHFR 677T with the degree of HI (mean thresholds in dB: 38.8, 44.9, and 53.3, for CC, CT, and TT genotypes, respectively; p = 0.0013, p(cor.) = 0.017). Among male patients rs1801133 TT significantly increased the risk of severe/profound HI (odds ratio = 4.88, p = 0.001). Among controls the known effect of MTHFR 677T on plasma total homocysteine was more pronounced in men than in women (p<0.00004 for genotype-sex interaction) suggesting that in Poland folate deficiency is more prevalent in males. In conclusion, we report a novel strong effect of MTHFR 677T among males with npHI. The functional significance of rs1801133 suggests that these patients may benefit from folate supplementation-an intervention which is simple, cheap, and devoid of side effects. PMID:22424391
Kane, Kelly L.; Longo-Guess, Chantal M.; Gagnon, Leona H.; Ding, Dalian; Salvi, Richard J.; Johnson, Kenneth R.
Inbred strain variants of the Cdh23 gene have been shown to influence the onset and progression of age-related hearing loss (AHL) in mice. In linkage backcrosses, the recessive Cdh23 allele (ahl) of the C57BL/6J strain, when homozygous, confers increased susceptibility to AHL, while the dominant allele (Ahl+) of the CBA/CaJ strain confers resistance. To determine the isolated effects of these alleles on different strain backgrounds, we produced the reciprocal congenic strains B6.CBACa-Cdh23Ah...
Buus, Søren; Florentine, Mary; Poulsen, Torben
To investigate how hearing loss of primarily cochlear origin affects the loudness of brief tones, loudness matches between 5- and 200-ms tones were obtained as a function of level for 15 listeners with cochlear impairments and for seven age-matched controls. Three frequencies, usually 0.5, 1, and 4 kHz, were tested in each listener using a two-interval, two-alternative forced-choice (2I, 2AFC) paradigm with a roving-level, up–down adaptive procedure. Results for the normal listeners generally we...
Human IGF-I deficiency (ORPHA73272, OMIM608747) is a rare disease associated with poor growth rates, mental retardation and syndromic hearing loss. Equally, Igf1?/? mice are dwarfs with poor survival rates and congenital profound deafness1. IGF-I is a neuroprotective agent, and accordingly, low circulating IGF-I levels have been related to cognitive and brain alterations. Igf1?/? mice present undetectable serum levels of IGF-I throughout their life, whereas Igf1+/- and Igf1+/+ littermates sho...
Buus, SØren; Florentine, Mary
To investigate how hearing loss of primarily cochlear origin affects the loudness of brief tones, loudness matches between 5- and 200-ms tones were obtained as a function of level for 15 listeners with cochlear impairments and for seven age-matched controls. Three frequencies, usually 0.5, 1, and 4 kHz, were tested in each listener using a two-interval, two-alternative forced-choice (2I, 2AFC) paradigm with a roving-level, up–down adaptive procedure. Results for the normal listeners generally were consistent with published data [e.g., , J. Acoust Soc. Am. 99, 1633–1644 (1996)]. The amount of temporal integration—defined as the level difference between equally loud short and long tones—varied nonmonotonically with level and was largest at moderate levels. No consistent effect of frequency was apparent. The impaired listeners varied widely, but most showed a clear effect of level on the amount of temporal integration. Overall, their results appear consistent with expectations based on knowledge of the general properties of their loudness-growth functions and the equal-loudness-ratio hypothesis, which states that the loudness ratio between equal-SPL long and brief tones is the same at all SPLs. The impaired listeners' amounts of temporal integration at high SPLs often were larger than normal, although it was reduced near threshold. When evaluated at equal SLs, the amount of temporal integration well above threshold usually was in the low end of the normal range. Two listeners with abrupt high-frequency hearing losses (slopes >50 dB/octave) showed larger-than-normal maximal amounts of temporal integration (40 to 50 dB). This finding is consistent with the shallow loudness functions predicted by our excitation-pattern model for impaired listeners [, in Modeling Sensorineural Hearing Loss, edited by W. Jesteadt (Erlbaum, Mahwah, NJ, 1997), pp. 187–198]. Loudness functions derived from impaired listeners' temporal-integration functions indicate that restoration of loudness in listeners with cochlear hearing loss usually will require the same gain whether the sound is short or long. ©1999 Acoustical Society of America.
Zhang, G-Y; Yang, M; Liu, B; Huang, Z-C; Li, J; Chen, J-Y; Chen, H; Zhang, P-P; Liu, L-J; Wang, J; Teng, G-J
Previous studies often report that early auditory deprivation or congenital deafness contributes to cross-modal reorganization in the auditory-deprived cortex, and this cross-modal reorganization limits clinical benefit from cochlear prosthetics. However, there are inconsistencies among study results on cortical reorganization in those subjects with long-term unilateral sensorineural hearing loss (USNHL). It is also unclear whether there exists a similar cross-modal plasticity of the auditory cortex for acquired monaural deafness and early or congenital deafness. To address this issue, we constructed the directional brain functional networks based on entropy connectivity of resting-state functional MRI and researched changes of the networks. Thirty-four long-term USNHL individuals and seventeen normally hearing individuals participated in the test, and all USNHL patients had acquired deafness. We found that certain brain regions of the sensorimotor and visual networks presented enhanced synchronous output entropy connectivity with the left primary auditory cortex in the left long-term USNHL individuals as compared with normally hearing individuals. Especially, the left USNHL showed more significant changes of entropy connectivity than the right USNHL. No significant plastic changes were observed in the right USNHL. Our results indicate that the left primary auditory cortex (non-auditory-deprived cortex) in patients with left USNHL has been reorganized by visual and sensorimotor modalities through cross-modal plasticity. Furthermore, the cross-modal reorganization also alters the directional brain functional networks. The auditory deprivation from the left or right side generates different influences on the human brain. PMID:26621123
Grose, John H.; Hall III, Joseph W.; Buss, Emily
This study examined the effects of cochlear hearing loss on gap duration discrimination (GDD), with particular interest in whether cochlear hearing loss results in increased difficulty for across-channel temporal judgments. The hypothesis being tested was that listeners with cochlear loss would perform as well as normal-hearing listeners for all within-channel conditions but would exhibit relatively greater performance deficits in the across-channel conditions. A subsidiary aim was to determi...
Incidência e prevalência de perda auditiva induzida por ruído em trabalhadores de uma indústria metalúrgica, Manaus - AM, Brasil / Incidence and prevalence of noise induced hearing loss in workers of a metallurgical company in Manaus - AM, Brazil
Ana Cristina Furtado de Carvalho, Régis; Karla Geovanna Moraes, Crispim; Aldo Pacheco, Ferreira.
Full Text Available OBJETIVO: estimar a incidência e a prevalência de déficit auditivo sugestivo de Perda Auditiva Induzida por Ruído e sua associação com idade e tempo de serviço em trabalhadores de uma indústria metalúrgica do pólo industrial de Manaus. MÉTODOS: estudo transversal descritivo em trabalhadores qu [...] e se submeteram a exame audiométrico periódico no ano de 2012, totalizando 1499 sujeitos. Para estimativa da incidência foram selecionadas audiometrias de 763 trabalhadores com audição dentro da normalidade no exame de referência e comparados com exame atual. Realizou-se análise estatística por meio de medidas de tendência central, dispersão e distribuições de frequência. Para verificação de diferenças estatisticamente significantes utilizou-se o teste qui-quadrado, com nível de significância (p?0,05). RESULTADOS: a prevalência de perda auditiva foi de 44,23% sendo 28,89% sugestivo de PAIR. Houve maior prevalência de perda auditiva nos trabalhadores com faixa etária acima de 45 anos e com tempo de serviço superior a 21 anos. Apenas 11,1% dos trabalhadores acima dos 21 anos de serviço apresentaram audição normal, e 61,9% perda auditiva sugestiva de Perda Auditiva Induzida por Ruído. A classificação de Não Sugestivo de Perda Auditiva Induzida por Ruído permanece estável nos indivíduos abaixo de 20 anos de exposição laboral (14,9%) e nas pessoas expostas com mais de 20 anos aumenta para 27%. A incidência de perda auditiva foi de 28% e desse total 19,7% sugestiva de Perda Auditiva Induzida por Ruído. Houve maior prevalência de perda auditiva grau leve. Conclusão: a prevalência e a incidência de perda auditiva aumentaram com a idade e tempo de serviço. As empresas devem se empenhar na implementação do Programa de Conservação Auditiva a fim de minimizar essas perdas. Abstract in english PURPOSE: to estimate the incidence and prevalence of hearing loss suggestive of Noise Induced Hearing Loss and its association with age and time of service in metallurgical industrial pole workers in Manaus. METHODS: cross-sectional study in workers who underwent audiometric testing periodical i [...] n 2012, totaling 1499 subjects. To estimate the incidence were selected 763 audiometrys with normal hearing at the reference testing and after compared with the current audiometry. Statistical analyses were performed using measures of central tendency, dispersion and frequency distributions. To verify statistically significant differences, we used the chi-square test, with significance level (p ? 0.05). RESULTS: the prevalence of hearing loss was estimated at 44.23% and 28.89% suggestive of Noise Induced Hearing Loss. There was a higher prevalence of hearing loss among workers aged from 45 years and time of service exceeding 21 years. Only 11.1% of workers over 21 years of service have normal hearing and 61.9% loss of these features suggestive of Noise Induced Hearing Loss. The classification of Not Suggestive of Noise Induced Hearing Loss remains stable in individuals below 20 years of occupational exposure (14.9%), and in people exposed to more than 20 years, increases to 27%. The incidence of hearing loss was 28% and within this total, 19.7% were suggestive of Noise Induced Hearing Loss. Most hearing loss, both suggestive of Noise Induced Hearing Loss, or not, were classified in light. CONCLUSION: the prevalence and incidence of hearing loss increased with age and time of service. Companies should strive to implement Hearing Conservation Program to minimize these losses.
Chen, Jing; ZHAO, HONG-BO
The KCNJ10 gene which encodes an inwardly rectifying K+ channel Kir4.1 subunit plays an essential role in the inner ear and hearing. Mutations or deficiency of KCNJ10 can cause hearing loss with EAST or SeSAME syndromes. This review mainly focuses on the expression and function of Kir4.1 potassium channels in the inner ear and hearing. We first introduce general information about Kir potassium channels. Then, we review the expression and function of Kir4.1 channels in the inner ear, especiall...
Huebner, Antje K.; Gandia, Marta; Frommolt, Peter; Maak, Anika; Wicklein, Eva M.; Thiele, Holger; Altmüller, Janine; Wagner, Florian; Viñuela, Antonio; Aguirre, Luis A.; Moreno, Felipe; Maier, Hannes; Rau, Isabella; Gießelmann, Sebastian; Nürnberg, Gudrun
The fact that hereditary hearing loss is the most common sensory disorder in humans is reflected by, among other things, an extraordinary allelic and nonallelic genetic heterogeneity. X-chromosomal hearing impairment represents only a minor fraction of all cases. In a study of a Spanish family the locus for one of the X-chromosomal forms was assigned to Xp22 (DFNX4). We mapped the disease locus in the same chromosomal region in a large German pedigree with X-chromosomal nonsyndromic hearing i...
Kale, Sushrut; Micheyl, Christophe; Heinz, Michael G.
Listeners with sensorineural hearing loss (SNHL) often show poorer thresholds for fundamental-frequency (F0) discrimination, and poorer discrimination between harmonic and frequency-shifted (inharmonic) complex tones, than normal-hearing (NH) listeners—especially when these tones contain resolved or partially resolved components. It has been suggested that these perceptual deficits reflect reduced access to temporal-fine-structure (TFS) information, and could be due to degraded phase-locking ...
Christensen, Nathan; D'Souza, Mary; Zhu, Xiaoxia; Frisina, Robert D
Presbycusis – age-related hearing loss, is the number one communication disorder, and one of the top three chronic medical conditions of our aged population. Aquaporins, particularly aquaporin 4 (Aqp4), are membrane proteins with important roles in water and ion flux across cell membranes, including cells of the inner ear and pathways of the brain used for hearing. To more fully understand the biological bases of presbycusis, 39 CBA mice, a well-studied animal model of presbycusis, underwent ...
Elif Baysal; Yildirim A. Bayazit; Serdar Ceylaner; Necat Alatas; Buket Donmez; Gulay Ceylaner; Imran San; Baki Korkmaz; Akin Yilmaz; Adnan Menevse; Senay Altunyay; Bulent Gunduz; Nebil Goksu; Ahmet Arslan; Abdullah Ekmekci
This study aimed to assess mutations in GJB2 gene (connexin 26), as well as A1555G mitochondrial mutation in both the patients with profound genetic nonsyndromic hearing loss and healthy controls. Ninety-five patients with profound hearing loss (>90 dB) and 67 healthy controls were included. All patients had genetic nonsyndromic hearing loss. Molecular analyses were performed for connexin 26 (35delG, M34T, L90P, R184P, delE120, 167delT, 235delC and IVS1+1 A ? G) mutations, and for mitochondrial A1555G mutation. Twenty-two connexin 26 mutations were found in 14.7% of the patients, which were 35delG, R184P, del120E and IVS1+1 A ? G. Mitochondrial A1555G mutation was not encountered. The most common GJB2 gene mutation was 35delG, which was followed by del120E, IVS1+1 A ? G and R184P, and 14.3% of the patients segregated with DFNB1. In consanguineous marriages, the most common mutation was 35delG. The carrier frequency for 35delG mutation was 1.4% in the controls. 35delG and del120E populations, seems the most common connexin 26 mutations that cause genetic nonsyndromic hearing loss in this country. Nonsyndromic hearing loss mostly shows DFNB1 form of segregation.
Maria Renata, José; Patrícia Danieli, Campos; Maria Fernanda Capoani Garcia, Mondelli.
Full Text Available Aperda auditiva unilateral é caracterizada pela diminuição da audição em apenas uma orelha. Os problemas acometidos pela privação sensorial podem ser minimizados com o uso do Aparelho de Amplificação Sonora individual (AASI). OBJETIVO: Analisar a correlação entre a diferença do ganho prescrito e gan [...] ho de inserção com os resultados obtidos em relação ao benefício e a satisfação quanto ao uso do AASI por pacientes deficientes auditivos unilaterais. MATERIAL E MÉTODO: Estudo prospectivo, com 15 indivíduos, com média de idade de 41,6 anos, de ambos os gêneros, usuários de AASI de maneira efetiva. Foi utilizado o Questionário internacional de Resultados para Aparelhos de Amplificação Sonora (International Outcome Inventory for Hearing Aids - iOi-HA) e medidas com microfone sonda. RESULTADOS: As médias obtidas nas análises do iOi-HA por item foram positivas e superiores a quatro pontos. Em relação às medidas objetivas, as frequências nas quais foram atingidos os valores do ganho obtido mais próximas ao target foram: 1K Hz, 2K Hz e 500 Hz, respectivamente. CONCLUSÃO: A satisfação em indivíduos usuários de AASI unilateralmente não está totalmente correlacionada ao ganho prescrito, pois mesmo não sendo atingido o target em algumas frequências, os indivíduos apresentam satisfação quanto ao uso de seus aparelhos auditivos. Abstract in english A unilateral hearing loss is characterized by reduced hearing in one ear. The problems caused by sensory deprivation can be minimized with the use of hearing aids (HA). AIM: To analyze the correlation between the prescribed grain and the insertion gain difference and with the results obtained regard [...] ing the benefit and satisfaction with the use of hearing aids in unilateral hearing impaired patients. MATERIALS AND METHODS: Prospective study with 15 subjects, mean age of 41.6 years, of both genders, users of hearing aids effectively. We used the International Questionnaire Results for hearing aids (International Outcome Inventory for Hearing Aids - IOI-HA), measured with a probe microphone. RESULTS: The mean values in the analyses of the IOI-HA per item were positive and higher than four points. In relation to the objective measures, the frequencies in which we obtained the gain values which were closer to the target were: 1K Hz, 2K Hz and 500 Hz, respectively. CONCLUSION: The satisfaction of individuals using hearing aid unilaterally is not completely correlated to the prescribed gain, because even if the target is not being reached in some frequencies, the individuals were pleased as to the use of their hearing aids.
Patrícia Graciano Vicci de, Araújo; Maria Fernanda Capoani Garcia, Mondelli; José Roberto Pereira, Lauris; Antonio, Richiéri-Costa; Mariza Ribeiro, Feniman.
Full Text Available A deficiência auditiva (DA) unilateral é caracterizada pela diminuição da audição em apenas uma orelha podendo acarretar dificuldade acadêmica, alterações de linguagem e dificuldade sócio-emocionais. OBJETIVO: Avaliar a autopercepção do handicap auditivo de sujeitos adultos, portadores de DA sensóri [...] o-neural unilateral, não usuários de Aparelho de Amplificação Sonora Individual. MATERIAL E MÉTODO: Estudo Prospectivo com 52 sujeitos adultos, com média de 34.5 anos e de ambos os gêneros (26 do gênero feminino, 26 do masculino) com deficiência auditiva: tipo neurossensorial unilateral, de graus variados; responderam a um questionário para a avaliação do handicap sendo utilizado o "Hearing Handicap Inventory for Adults" (HHIA). RESULTADOS: Foram pontuadas as subescalas dos aspectos emocionais e sociais/situacionais sendo encontrados 73,1% de presença do handicap entre os graus leve, moderado e significativo e em maior porcentagem (88,5%) no gênero feminino. CONCLUSÕES: A aplicação do questionário mostrou-se um procedimento eficiente, pois a DA unilateral pode, não raramente, comprometer aspectos sociais e emocionais do sujeito adulto e o mesmo grau de DA podem reagir de forma diferente, indicando que a grande variabilidade na autopercepção do handicap auditivo está associada a aspectos não audiológicos. Abstract in english Hearing impairment (HI) is characterized by unilateral hearing loss in one ear and can result in learning difficulties, language impairment and socio-emotional difficulties. To assess the perception of hearing handicap in adult subjects, patients with unilateral sensorineural HI, non-users of indivi [...] dual hearing aids. MATERIALS AND METHODS: Prospective study with 52 adult subjects with a mean of 34.5 years of age, from both genders (26 females, 26 males) with hearing loss: sensorineural unilateral, in varying degrees, responded to a questionnaire for assessing hearing handicap, and for that we used the Hearing Handicap Inventory for Adults (HHIA). RESULTS: We scored the subscales of the emotional and social/situational aspects, and we found 73.1% of the handicap present being mild, moderate and significant, but at a higher percentage (88.5%) in females. CONCLUSIONS: The use of the questionnaire proved to be an effective procedure, because the unilateral HI may, not infrequently, compromise social and emotional aspects of the adult subject and the same degree of HI who can react differently, indicating that the wide variability in the perception of the hearing handicap is associated with non-audiological aspects.
Background and purpose: Cisplatin-based chemo-irradiation (CRT) is increasingly used for head and neck squamous cell carcinoma (HNSCC). We aimed to assess hearing deterioration due to low-dose cisplatin chemoradiation and to compare the observed hearing loss with hearing loss in our previously described high-dose cisplatin CRT cohort. Materials and methods: A prospective analysis of hearing thresholds at low and (ultra)-high frequencies obtained before and after treatment in 60 patients. Patients received low-dose cisplatin (6 mg/m2, daily infusions, 20-25 days) with concomitant accelerated radiotherapy (70 Gy). Results: Audiometry up to 16 kHz was performed before therapy and 31 days (median) post-treatment. The total incidence of ototoxicity in CTCAEv3.0 was 31% in audiograms up to 8 kHz, and 5% of ears tested qualified for HAs due to treatment. The mean hearing loss at speech frequencies was 2.6 dB (SD 5.7) and 2.3 dB (SD 9.2) at PTA 1-2-4 kHz air-conduction and bone-conduction, respectively. The mean hearing loss at ultra-high frequencies (PTA AC 8-10-12.5 kHz) was 9.0 dB (SD 8.1). Low-dose cisplatin CRT caused less acute hearing loss (CTCAE 31%), compared to high-dose cisplatin CRT (CTCAE 78%). Conclusions: Low-dose cisplatin chemo-irradiation for HNSCC is a relatively safe treatment protocol with respect to ototoxicity
Yang, Haidi; Xiong, Hao; Huang, Qiuhong; Pang, Jiaqi; Zheng, Xuqing; Chen, Lian; Yu, Rongjun; Zheng, Yiqing
The C57BL/6 strain is considered an excellent model to study age-related hearing loss (AHL). Aging C57BL/6 mice are characterized by profound hearing loss but conservation of the endocochlear potential (EP). Here we show 12-month-old C57BL/6 mice display a notable hearing loss at 4, 8, 16 and 32kHz while the EP is maintained at normal level. Morphological examination shows significant outer hair cells loss in the cochlear basal turn and atrophy of the stria vascularis (SV). Fluorescence immunohistochemical studies reveal that potassium channel KCNJ10 and KCNQ1 expression dramatically decreased in the SV. Concomitant with this, mRNA levels of KCNJ10 and KCNQ1 are also reduced. In addition, three other potassium transporters, including ?1-Na,K-ATPase, ?2-Na,K-ATPase and NKCC1, reduce their expression at mRNA levels as well. These observations suggest that conservation of the EP in aging C57BL/6 mice is attributable to the SV generating a new balance for potassium influx and efflux at a relatively lower level. PMID:24055606
Francisco Vileimar Andrade de, Azevedo; Juliana de Deus e, Albuquerque; Deborah Pereira, Gonçalves.
Full Text Available Policondrite recidivante é uma condição rara, imunomediada, caracterizada por episódios de inflamação de estruturas cartilaginosas, principalmente orelhas, nariz, articulações e sistema respiratório. Acomete também estruturas ricas em proteoglicanos como olhos, coração, vasos sanguíneos e ouvido int [...] erno. Em torno de 1/3 dos casos apresentam associação com outras doenças como vasculites sistêmicas, doenças do tecido conectivo ou síndrome mielodisplásica. Desordens do ouvido interno ocorrem em 40%-50% dos pacientes. Perda auditiva profunda é rara. O objetivo do estudo foi descrever o caso de uma paciente com diagnóstico de policondrite recidivante associado à perda auditiva severa bilateral e manifestações clínicas de vasculite sistêmica. Este trabalho reforça a importância do diagnóstico precoce e do tratamento imediato em caso de manifestações severas da doença. Abstract in english Relapsing polychondritis is an uncommon, immune-mediated condition characterized by episodes of inflammation of cartilaginous structures, especially the ears, nose, joints and respiratory tract. RP also affects proteoglycan-rich structures such as the eyes, heart, blood vessels and inner ear. Around [...] one third of cases are associated with other diseases such as vasculitides, connective tissue diseases or myelodysplastic syndrome. Disorders of the inner ear occur in 40–50% of patients. Profound hearing loss is rare. The aim of this study was to describe the case of a patient with relapsing polychondritis associated with severe bilateral hearing loss and clinical manifestations of systemic vasculitis. This study reinforces the importance of an early diagnosis and immediate treatment in case of severe manifestations of the disease.
Yuehua, Qiao; Longzhen, Zhang; Kailin, Xu; Lingyu, Zeng; Lingjian, Meng; Jun, Wang; Hong, Meng
We sought to determine the distribution of tumor necrosis factor (TNF)-?, interleukin (IL)-6 and lymphocytes in the cochlea of mice infected with murine cytomegalovirus (MCMV). For this purpose, 16 newborn mice were divided equally into model and control (uninfected) groups. In model group, 10 ?l of MCMV was injected into the brain of each mouse whereas in control group, 10 ?l of physiological saline was injected. Fourteen days after the injection of MCMV, the auditory brainstem response audiometry was performed. Later, the mice were killed and the acoustic capsule samples were collected for polymerase chain reaction analysis, histopathological and immunohistochemical studies. Compared with control mice, the incubation period was longer (F = 13.797; P = 0.003) and the amplitude was lower (F = 5.095; P = 0.043) in model group mice. It indicated that the intracerebral injection of MCMV caused hearing loss in mice. Histopathological examination of cochleas revealed increased levels of lymphocytic infiltration in the membrana vestibularis. Higher levels of TNF-? and IL-6 in scala tympani were detected by immunohistochemical staining. Taken together, the hearing loss in mice could be related with the inflammatory changes occurring in cochlea after inception of MCMV infection. PMID:22001951
Atik, Tahir; Onay, Huseyin; Aykut, Ayca; Bademci, Guney; Kirazli, Tayfun; Tekin, Mustafa; Ozkinay, Ferda
Comprehensive genetic testing has the potential to become the standard of care for individuals with hearing loss. In this study, we investigated the genetic etiology of autosomal recessive nonsyndromic hearing loss (ARNSHL) in a Turkish cohort including individuals with cochlear implant, who had a pedigree suggestive of an autosomal recessive inheritance. A workflow including prescreening of GJB2 and a targeted next generation sequencing panel (Illum?na TruSightTM Exome) covering 2761 genes that we briefly called as mendelian exome sequencing was used. This panel includes 102 deafness genes and a number of genes causing Mendelian disorders. Using this approach, we identified causative variants in 21 of 29 families. Three different GJB2 variants were present in seven families. Remaining 14 families had 15 different variants in other known NSHL genes (MYO7A, MYO15A, MARVELD2, TMIE, DFNB31, LOXHD1, GPSM2, TMC1, USH1G, CDH23). Of these variants, eight are novel. Mutation detection rate of our workflow is 72.4%, confirming the usefulness of targeted sequencing approach in NSHL. PMID:26561413
We report here the clinical, genetic, and molecular characterization of two Chinese pedigrees with aminoglycoside-induced and non-syndromic hearing impairment. Clinical evaluation revealed the variable phenotype of hearing impairment including audiometric configuration in these subjects. Penetrances of hearing loss in BJ105 and BJ106 pedigrees are 67% and 33%, respectively. In particular, three of 10 affected matrilineal relatives of BJ105 pedigree had aminoglycoside-induced hearing loss, while seven affected matrilineal relatives in BJ105 pedigree and six affected matrilineal relatives in BJ106 pedigree did not have a history of exposure to aminoglycosides. Sequence analysis of the complete mitochondrial genomes in these pedigrees showed the identical homoplasmic A1555G mutation and distinct sets of mtDNA variants belonging to haplogroups F3 and M7b. These variants showed no evolutionary conservation, implying that mitochondrial haplotype may not play a significant role in the phenotypic expression of the A1555G mutation in these Chinese pedigrees. However, aminoglycosides and nuclear backgrounds appear to be major modifier factors for the phenotypic manifestation of the A1555G mutation in these Chinese families
Regina C.M. Cavalli
Full Text Available OBJETIVO: O presente trabalho teve como objetivo examinar se medidas práticas de prevenção de perdas auditivas, adotadas por indústrias de Curitiba e região metropolitana, atendem às exigências da legislação trabalhista vigente e recomendações científicas que abordam este tema. FORMA DE ESTUDO: Coorte transversal. MATERIAL E MÉTODO: Um questionário elaborado pelo instituto americano National Institute for Occupational Safety and Health (NIOSH em 1996, para auditoria de programas de prevenção de perdas auditivas (PPPA, nos serviu de instrumento para a coleta de dados. O instrumento original possui 89 questões divididas em oito temas relacionados à prática dos programas: treinamento e educação, envolvimento do supervisor, medição do ruído, controle de Engenharia e Administrativo, monitoração audiométrica e manutenção dos registros, encaminhamentos, equipamento de proteção individual e questões administrativas. A coleta de dados foi realizada com Médicos do Trabalho, Engenheiros e/ou Técnicos de Segurança das indústrias. As empresas foram divididas em dois grupos: o das empresas que possuem um PPPA e o das que não possuem. CONCLUSÃO: Com base nos dados obtidos concluímos que não houve diferença significativa de conduta entre os grupos e que ambos cumprem parcialmente a legislação trabalhista relacionada à prevenção dos efeitos do ruído. Quanto às questões que abordam aspectos que se excedem às exigências legais, concluímos que as empresas que possuem PPPA dedicam maiores esforços à prevenção de perdas auditivas. Com estes dados identificamos pontos fortes e fracos das medidas que vêm sendo adotadas pelas indústrias da região, os quais poderão nos direcionar à elaboração de medidas preventivas mais efetivas e de propostas para revisão da legislação vigente.AIM: The objective of this study is to examine if the hearing loss prevention practices in industries located in the greater Curitiba area are meeting legal requirements and scientific recommendations. STUDY DESIGN: Transversal cohort. MATERIAL AND METHOD: A questionnaire prepared by the American National Institute for Occupational Safety and Health, NIOSH, in 1996, for auditing hearing loss prevention programs (HLPP was used as an instrument for data collection. This instrument has 89 questions, divided in eight themes about the following aspects of HLPP programs: training and education, supervisor involvement, noise measurement, engineering and administrative controls, monitoring audiometry, record keeping, referrals, hearing protections devices and administrative aspects. The data was collected through interviews with occupational physicians, engineers and/or safety technicians. The industries were divided in two groups: one composed of industries with HLPPs and another without HLPPs. CONCLUSION: No significant difference was observed between groups and both meet, in part, the legal requirements for hearing loss prevention. Questions about practices that exceed the legal requirements indicated that industries with HLPPs dedicated greater efforts to hearing loss prevention. Through the data analysis, we could identify the strengths and weaknesses of the HLPP programs in this region of Brazil. This information can lead to the proposal of more effective preventive measures and legislation revisions.
Topsakal, Vedat; Hilgert, Nele
Clinical and audiological examination was done in 2 Belgian families with autosomal dominant sensorineural hearing loss (SNHL) linked to DFNA22. Nineteen subjects in family 1 had mild to moderate SNHL starting in the third decade. The hearing loss was characterized by a flat audiogram affecting all tested frequencies with statistically significant progression. In family 2 eleven subjects were affected with mild to moderate SNHL starting in the second decade. Most of them showed a flat audiogram, but some had mid-frequency hearing loss. Significant progression of thresholds was present at 4 and 8 kHz. For all hitherto known DFNA22 families the audiological and clinical characteristics were correlated with the molecular data. This study describes the phenotype of 2 Belgian families with SNHL linked to DFNA22, both with a pathogenic change in the deafness gene MYO6. The phenotypes of all hitherto reported DFNA22 families with mutations in the MYO6 gene have been studied and compared. It seems that genetic defects that spare the motor domain of the myosin VI protein have a milder phenotype.
Bakhchane, Amina; Charoute, Hicham; Nahili, Halima; Roky, Rachida; Rouba, Hassan; Charif, Majida; Lenaers, Guy; Barakat, Abdelhamid
Autosomal recessive non-syndromic hearing loss (ARNSHL) is one of the most common genetic diseases in human and is subject to important genetic heterogeneity, rendering molecular diagnosis difficult. Whole-exome sequencing is thus a powerful strategy for this purpose. After excluding GJB2 mutation and other common mutations associated with hearing loss in Morocco, whole-exome sequencing was performed to study the genetic causes of one sibling with ARSHNL in a consanguineous Moroccan family. After filtering data and Sanger sequencing validation, one novel pathogenic homozygous mutation c.1810C>G (p.Arg604Gly) was identified in TMC1, a gene reported to cause deafness in various populations. Thus, we identified here the first mutation in the TMC1 gene in the Moroccan population causing non-syndromic hearing loss. PMID:26226225
Full Text Available Background and Aim: Conversational repair skills are essential for establishing mutually successful verbal communication. Cognitive and linguistic disorders can have negative effects on these skills. Children with hearing loss have special cognitive and linguistic issues. This study was performed to contribute to the paucity of data on conversational repair strategies used by hearing impaired children.Methods: The participants included 58 children with moderate hearing loss (38 boys and 20 girls aged 6 to 7 from Ahvaz city. A cross-sectional study design was used. Frequency of using different types of repair strategies in ten repair situations was calculated. Scores of intelligence, memory, word finding, lexical richness, and mean length of sentences was obtained through cognitive-linguistic tests. Data was analyzed employing an independent t-test, Pearson correlation coefficient, and logistic regression.Results: A direct correlation was observed between clarification strategy and communicative social intelligence (p=0.045. A direct correlation was observed between applying different types of conversational repair strategies and linguistic abilities in children with moderate hearing loss (p<0.05.Conclusion: Children with moderate hearing loss (age: 6-7 years use repetition more than any other strategy to repair conversation. One unit increase in word finding ability or in mean length of sentence predicts one unit increase in the degree of using repetition strategy.
Ng, Lily; Cordas, Emily; Wu, Xuefeng; Vella, Kristen R; Hollenberg, Anthony N; Forrest, Douglas
A key function of the thyroid hormone receptor ? (Thrb) gene is in the development of auditory function. However, the roles of the 2 receptor isoforms, TR?1 and TR?2, expressed by the Thrb gene are unclear, and it is unknown whether these isoforms promote the maintenance as well as development of hearing. We investigated the function of TR?1 in mice with a Thrb(b1) reporter allele that expresses ?-galactosidase instead of TR?1. In the immature cochlea, ?-galactosidase was detected in the greater epithelial ridge, sensory hair cells, spiral ligament, and spiral ganglion and in adulthood, at low levels in the hair cells, support cells and root cells of the outer sulcus. Although deletion of all TR? isoforms causes severe, early-onset deafness, deletion of TR?1 or TR?2 individually caused no obvious hearing loss in juvenile mice. However, over subsequent months, TR?1 deficiency resulted in progressive loss of hearing and loss of hair cells. TR?1-deficient mice had minimal changes in serum thyroid hormone and thyrotropin levels, indicating that hormonal imbalances were unlikely to cause hearing loss. The results suggest mutually shared roles for TR?1 and TR?2 in cochlear development and an unexpected requirement for TR?1 in the maintenance of hearing in adulthood. PMID:26241124
Jorge, Zúñiga P; Carolina, Espinoza G; Natalia, Tamblay; Cristian, Martínez.
Full Text Available Introducción: La hipoacusia súbita es un cuadro clínico que presenta controversias tanto en su etiología, como en su tratamiento. Existen escasos estudios en la literatura nacional sobre este tema. Objetivo: Evaluar la incidencia del cuadro de hipoacusia súbita en un año, en el Hospital Clínico de l [...] a Universidad de Chile, analizar características epidemiológicas, clínicas, y del tratamiento. Material y método: Estudio retrospectivo realizado en el Hospital Clínico de la Universidad de Chile, revisando fichas clínicas entre Diciembre del año 2004 hasta Noviembre de 2005, con diagnóstico de hipoacusia súbita. Resultados: Se realizó el estudio con 43 pacientes con diagnóstico de hipoacusia súbita. La mayoría recibió tratamiento corticoidal. El 28% de los pacientes mejoraron, el 18,7% tuvo una recuperación parcial, 9,3% recuperación total, no presentaron mejoría el 72%. Se encontró asociación entre menor edad y mejoría en forma casi significativa. Se encontró una asociación entre mejoría y compromiso del oído derecho en forma significativa. Conclusión: La mayoría de los hallazgos son comparables con la literatura nacional e internacional, la asociación mejoría v/s oído derecho debe ser validada por nuevos estudios. Abstract in english Introduction. Sudden hearing loss (SHL) is a medical condition somewhat controversia! in its etiologyand treatment. There are fewreports of SHL in the local literature. Aim. Jo assess the incidence of SHL at the University of Chile Hospital during a year-long period, analyzing the epidemiological, c [...] linical and treatment characteristics. Material and Method. Restrospective review of SHL clinical data between December 2004 and November 2005. Results. Forty three patients diagnosed with SHL were included. Most were treated with corticoids. In 28% of cases, there was an improvement ofthe condition. Ofthese, in 18.7% there was a partial improvement, and in 9.3% a compiete recovery. There was no improvement in 72% of the cases. The relation between age and recovery was almost significant. A significant relation between improvement andright ear involvement was found. Conclusión. Most of our findings are similar to those reponed in the literature; the association between recovery an right ear involvement should be validated by Mure studies.
Jorge Zúñiga P
Full Text Available Introducción: La hipoacusia súbita es un cuadro clínico que presenta controversias tanto en su etiología, como en su tratamiento. Existen escasos estudios en la literatura nacional sobre este tema. Objetivo: Evaluar la incidencia del cuadro de hipoacusia súbita en un año, en el Hospital Clínico de la Universidad de Chile, analizar características epidemiológicas, clínicas, y del tratamiento. Material y método: Estudio retrospectivo realizado en el Hospital Clínico de la Universidad de Chile, revisando fichas clínicas entre Diciembre del año 2004 hasta Noviembre de 2005, con diagnóstico de hipoacusia súbita. Resultados: Se realizó el estudio con 43 pacientes con diagnóstico de hipoacusia súbita. La mayoría recibió tratamiento corticoidal. El 28% de los pacientes mejoraron, el 18,7% tuvo una recuperación parcial, 9,3% recuperación total, no presentaron mejoría el 72%. Se encontró asociación entre menor edad y mejoría en forma casi significativa. Se encontró una asociación entre mejoría y compromiso del oído derecho en forma significativa. Conclusión: La mayoría de los hallazgos son comparables con la literatura nacional e internacional, la asociación mejoría v/s oído derecho debe ser validada por nuevos estudios.Introduction. Sudden hearing loss (SHL is a medical condition somewhat controversia! in its etiologyand treatment. There are fewreports of SHL in the local literature. Aim. Jo assess the incidence of SHL at the University of Chile Hospital during a year-long period, analyzing the epidemiological, clinical and treatment characteristics. Material and Method. Restrospective review of SHL clinical data between December 2004 and November 2005. Results. Forty three patients diagnosed with SHL were included. Most were treated with corticoids. In 28% of cases, there was an improvement ofthe condition. Ofthese, in 18.7% there was a partial improvement, and in 9.3% a compiete recovery. There was no improvement in 72% of the cases. The relation between age and recovery was almost significant. A significant relation between improvement andright ear involvement was found. Conclusión. Most of our findings are similar to those reponed in the literature; the association between recovery an right ear involvement should be validated by Mure studies.
Zenner, H. P.; Reuter, G.; Zimmermann, U.; Gitter, A. H.; Fermin, C.; LePage, E. L.
There are types of deafness and tinnitus in which ruptures or massive changes in the ionic permeability of the membranes lining the endolymphatic space [e.g., of the reticular lamina (RL)] are believed to allow potassium-rich endolymph to deluge the low [K+] perilymphatic fluid (e.g., in the small spaces of Nuel). This would result in a K+ intoxication of sensory and neural structures. Acute attacks of Meniere's disease have been suggested to be an important example for this event. The present study investigated the effects of transiently elevated [K+] due to the addition of artificial endolymph to the basolateral cell surface of outer hair cells (OHC) in replicating endolymph-induced K+ intoxication of the perilymph in the small spaces of Nuel. The influence of K+ intoxication of the basolateral OHC cell surface on the transduction was then examined. Intoxication resulted in an inhibition of the physiological repolarizing K+ efflux from hair cells. This induced unwanted depolarizations of the hair cells, interfering with mechanoelectrical transduction. A pathological longitudinal OHC shortening was also found, with subsequent compression of the organ of Corti possibly influencing the micromechanics of the mechanically active OHC. Both micromechanical and electrophysiological alterations are proposed to contribute to endolymph leakage induced attacks of deafness and possibly also to tinnitus. Moreover, repeated or long-lasting K+ intoxications of OHC resulted in a chronic and complete loss of OHC motility. This is suggested to be a pathophysiological basis in some patients with chronic hearing loss resulting from Meniere's syndrome.
Bashir, Rasheeda; Imtiaz, Ayesha; Fatima, Amara; Alam, Afzaal; Naz, Sadaf
The DFNB79 locus harbors TPRN mutations that have been reported in a few families with deafness. Four frameshift mutations in TPRN have been described to cause severe or severe-to-profound hearing loss in Moroccan and Pakistani families, and a single frameshift mutation was associated with progressive hearing loss in deaf individuals in a Dutch family. We identified a Pakistani family in which the affected individuals were homozygous for a pathogenic mutation, c.42_52del11, in TPRN (p.G15Afs1...
Zhang, Qian; Liu, Huizhan; McGee, JoAnn; Edward J. Walsh; Soukup, Garrett A.; He, David Z. Z.
MicroRNAs (miRNAs), a class of short non-coding RNAs that regulate the expression of mRNA targets, are important regulators of cellular senescence and aging. We questioned which miRNAs are involved in age-related degeneration of the organ of Corti (OC), the auditory sensory epithelium that transduces mechanical stimuli to electrical activity in the inner ear. Degeneration of the OC is generally accepted as the main cause of age-related hearing loss (ARHL), a progressive loss of hearing in ind...
Alexandre Hundertmarck, Lessa; Maristela Julio, Costa; Karine Thais, Becker; Ana Valéria Almeida, Vaucher.
Full Text Available INTRODUÇÃO: É necessário analisar a eficácia da protetização, considerando a necessidade de amplificação e dificuldade na comunicação. OBJETIVO: Analisar a satisfação de adultos e idosos, usuários de próteses auditivas, com perda auditiva de graus severo e profundo, usando um questionário e pesquisa [...] r fatores que possam dificultar a adaptação. MÉTODO: Estudo retrospectivo de 56 pacientes, com idades entre 18 e 86 anos, perda auditiva de graus severo e profundo e protetizados por um programa de concessão de próteses auditivas, submetidos ao questionário [i]Satisfaction with Amplification in Daily Life[/i]. Foram calculadas as médias global, por subescala e por questão e deu-se ênfase às questões que resultaram em melhores e piores médias. RESULTADOS: 58,9% mulheres e 41,1% homens, cerca de 55% dos pacientes apresentaram perda auditiva de grau severo e 45% profundo. 87,5% referiu uso maior que 8 horas diárias. Os usuários acreditam que a aquisição da prótese auditiva foi a melhor opção e que esta auxilia muito no entendimento da fala. Sentem-se mais confiantes e capazes com a amplificação sonora e referem bom atendimento pelos profissionais do serviço. O desempenho ao telefone foi o problema encontrado. CONCLUSÃO: Foi demonstrado elevado grau de satisfação na população estudada. O grau da perda auditiva, assim como a incompatibilidade de sistemas entre telefone e bobina telefônica e a dificuldade no posicionamento do telefone são fatores que dificultam o bom desempenho ao telefone. A acentuada perda auditiva colabora para que a prótese auditiva seja parte integrante do dia-a-dia e essencial no auxílio à comunicação. Abstract in english INTRODUCTION: It is necessary to analyze the efficiency of the hearing aids use, considering the necessity of enlargement and communication difficulty. OBJECTIVE: To analyze the satisfaction of adults and elders, users of hearing aids with hearing loss of severe and deep degree, using a questionnair [...] e and searching factors that can difficult the adaptation. METHOD: A retrospective study of 56 patients, with age group between 18 and 86 years old, hearing loss of severe and deep degree and users of HA by a program of concession of hearing aids, submitted to the questionnaire: "Satisfaction with Amplification in Daily Life". The global average was calculated by sub scale and by question and it was given emphasis to the questions that resulted in best and worse averages. RESULTS: 58,9% were women and 41,1% men, about of 55% of the patients presented hearing loss of severe degree and 45% deep degree. 87,5% referred use major than 8 hours daily. The users believe that the acquisition of the hearing aid was the best option and this aid very much in the speech understanding. They feel themselves trustful and able with the sounding amplification and refer a good service by professionals of the service. The performance to the telephone was the problem found. CONCLUSION: It was demonstrated high degree of satisfaction in the studied population. The hearing loss degree, as well as the incompatibility of systems between telephone and telecoils and the difficulty in the placement of telephone ate factors that difficult the good performance to the telephone. The accentuated hearing loss collaborate for the hearing aid be an integral part of the daily life and essential in the aid to the communication.
Bumm, P; Müller, E C; Grimm-Müller, U; Schlimok, G
In patients with various otoneurological diseases like hearing loss, neuronitis vestibularis, Ménière's disease and Bell's palsy, analyses concerning the immunoregulation and immunogenetics were done. For analysing the immunoregulation the T-helper (CD4) T-suppressor (CD8) ratio was determined. In contrast to patients with hearing loss caused by otobasal fractures and a healty control group, this ratio was elevated in 50% of the patients suffering from hearing loss. The elevation of the CD4/CD8 ratio was mainly caused by a reduction of CD8 positive cytotoxic-suppressor T-lymphocytes. The CD4/CD8 ratio may be of prognostic value, since an elevated ratio was found more often in patients with relapse of hearing loss, fluctuations, persistence of tinnitus or vestibular symptoms. An elevated ratio could also be detected in 48% of the patients with neuronitis vestibularis, in 50% of the patients with Ménière's disease and in 39% of the patients with Bell's palsy. A normal value was found in paralysis of the facial nerve of known origin like a state after trauma or after herpes zoster oticus paralysis. Immunogenetics was tested by HLA-DR typing. In patients with hearing loss HLA-DR4 antigen was distinctly increased, the relative risk was 2.8. The presence of the HLA-DR4 antigen proved to be an unfavourable sign, since in 44% of the patients presenting these antigens we found no improvement of the hearing. In patients with neuronitis vestibularis we found a relative risk of 3.12 and in patients with Ménière's disease a relative risk of 3.64, both for HLA-DR4.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:2064703
Latoche, Joseph R.; Neely, Harold R.; Noben-Trauth, Konrad
Progressive sensorineural hearing loss in humans is a common and debilitating impairment. Sensorineural deafness in inbred strains of mice is a similarly common and genetically diverse phenotype providing experimental models to study the underlying genetics and the biological effects of the risk factors. Here, we report that ALR/LtJ mice develop early-onset profound sensorineural hearing loss as evidenced by high-to-low frequency hearing threshold shifts, absent distortion-product otoacoustic...
Strauss, C; Naraghi, R; Bischoff, B.; Huk, W; Romstock, J
Contralateral hearing loss after surgical procedures within the cerebellopontine angle is rarely seen and its pathophysiological background is not yet understood. A patient with contralateral hearing loss after microvascular decompression for trigeminal neuralgia is described. Ipsilateral brainstem auditory potential (BAEP) monitoring and facial nerve EMG did not show major abnormalities. During otherwise uneventful and successful surgery a branch of the petrosal vein was sa...
Yan, Denise; Kannan-Sundhari, Abhiraami; Vishwanath, Subramanian; Qing, Jie; Mittal, Rahul; Kameswaran, Mohan; Liu, Xue Zhong
Deafness encompasses a series of etiologically heterogeneous disorders with mutations in more than 400 independent genes. However, several studies indicate that a large proportion of both syndromic and nonsyndromic forms of deafness in the racially diverse Indian and Pakistani populations are caused by defects in just a few genes. In these countries, there is a strong cultural preference for consanguineous marriage and an associated relatively high prevalence of genetic disorders. The current Indian population is approximately 1.2 billion and it is estimated that 30,000 infants are born with congenital sensorineural hearing loss (HL) each year. The estimated rate of profound bilateral HL is 1.6 per 1000 in Pakistan and 70% of this HL arises in consanguineous families. Knowledge of the genetic cause of deafness within a distinct population is important for accurate genetic counseling and early diagnosis for timely intervention and treatment options. Many sources and technologies are now available for the testing of hearing efficiency. Population-based screening has been proposed as one of the major strategies for translating genetic and genomic advances into population health gains. This review of the genetics of deafness in Indian and Pakistani populations deals with the major causes of deafness in these countries and prospectives for reducing the incidence of inherited deafness. PMID:26186295
Bakhchane, Amina; Charif, Majida; Salime, Sara; Boulouiz, Redouane; Nahili, Halima; Roky, Rachida
Mutations in the TBC1D24 gene are responsible for four neurological presentations: infantile epileptic encephalopathy, infantile myoclonic epilepsy, DOORS (deafness, onychodystrophy, osteodystrophy, mental retardation and seizures) and NSHL (non-syndromic hearing loss). For the latter, two recessive (DFNB86) and one dominant (DFNA65) mutations have so far been identified in consanguineous Pakistani and European/Chinese families, respectively. Here we report the results of a genetic study performed on a large Moroccan cohort of deaf patients that identified three families with compound heterozygote mutations in TBC1D24. Four novel mutations were identified, among which, one c.641G>A (p.Arg214His) was present in the three families, and has a frequency of 2% in control Moroccan population with normal hearing, suggesting that it acts as an hypomorphic variant leading to restricted deafness when combined with another recessive severe mutation. Altogether, our results show that mutations in TBC1D24 gene are a frequent cause (>2%) of NSHL in Morocco, and that due to its possible compound heterozygote recessive transmission, this gene should be further considered and screened in other deaf cohorts. PMID:26371875
Monge Naldi, Arianne; Belfrage, Celina; Jain, Neha; Wei, Eric T; Canto Martorell, Belén; Gassmann, Max; Vogel, Johannes
So far, typical causes of presbycusis such as degeneration of hair cells and/or primary auditory (spiral ganglion) neurons cannot be treated. Because erythropoietin's (Epo) neuroprotective potential has been shown previously, we determined hearing thresholds of juvenile and aged mice overexpressing Epo in neuronal tissues. Behavioral audiometry revealed in contrast to 5 months of age, that 11-month-old Epo-transgenic mice had up to 35 dB lower hearing thresholds between 1.4 and 32 kHz, and at the highest frequencies (50-80 kHz), thresholds could be obtained in aged Epo-transgenic only but not anymore in old C57BL6 control mice. Click-evoked auditory brainstem response showed similar results. Numbers of spiral ganglion neurons in aged C57BL6 but not Epo-transgenic mice were dramatically reduced mainly in the basal turn, the location of high frequencies. In addition, there was a tendency to better preservation of inner and outer hair cells in Epo-transgenic mice. Hence, Epo's known neuroprotective action effectively suppresses the loss of spiral ganglion cells and probably also hair cells and, thus, development of presbycusis in mice. PMID:26364734
Skinner, M W; Miller, J D
The intelligibility of speech mixed with noise (+6 dB S/N) and in quiet was measured as a function of its audible bandwidth for 7 listeners with moderate sensorineural hearing losses. Words were presented at three levels in the field (50, 60 and 70 dB SPL) and amplified with a Limiting Master Hearing Aid (LMHA) which allows independent control of gain and maximum power output in each of nine, half-octave channels. The frequency gain characteristics were chosen so the speech spectrum (60 dB SPL) at the input was shaped to approximate the individual listener's contour of most comfortable listening levels at the output. At each level and for the words in noise as well as quiet, the LMHA was set for four bandwidths (266-6 000, 375-4 242, 530-3 000 and 750-2 121 Hz). For these conditions, the listeners all obtained the highest mean score with the LMHA set for the widest bandwidth. The listener's ability to understand the words, after adjustment for individual differences, was well correlated (0.77-0.91) with the articulation index. Preliminary observations on the acceptability of amplified sounds, that is, loud speech, impact noise, an air-horn blast, and a party ratchet, are included. PMID:6870667
Full Text Available ... loss that is 100% preventable is noise. [loud electric motors] A. Julianna Gulya, M.D.: Loud noise ... loss may be permanent. Narrator: There are two general types of hearing loss. Conductive hearing loss occurs ...
Full Text Available Background: The objective of this study was to describe the audiologic and related characteristics of a group patient with speech perception affected out of proportion to pure tone hearing loss. A case series of patient were referred for evaluation and management to the Hearing Research Center.To describe the clinical picture of the patients with the key clinical feature of hearing loss for pure tones and reduction in speech discrimination out of proportion to the pure tone loss, having some of the criteria of auditory neuropathy (i.e. normal otoacoustic emissions, OAE, and abnormal auditory brainstem evoked potentials, ABR and lacking others (e.g. present auditory reflexes. Methods: Hearing abilities were measured by Pure Tone Audiometry (PTA and Speech Discrimination Scores (SDS, measured in all patients using a standardized list of 25 monosyllabic Farsi words at MCL in quiet. Auditory pathway integrity was measured by using Auditory Brainstem Response (ABR and Otoacoustic Emission (OAE and anatomical lesions Computed Tomography Scan (CT and Magnetic Resonance Image (MRI of brain and retrocochlea. Patient included in the series were 35 patients who have SDS disproportionably low with regard to PTA, absent ABR waves and normal OAE. Results: All patients reported the beginning of their problem around adolescence. Neither of them had anatomical lesion in imaging studies and neither of them had any finding suggestive of conductive hearing lesion. Although in most of the cases the hearing loss had been more apparent in the lower frequencies (i.e. 1000 Hz and less, a stronger correlation was found between SDS and hearing threshold at higher frequencies. These patients may not benefit from hearing aids, as the outer hair cells are functional and amplification doesn’t seem to help; though, it was tried for all. Conclusion: These patients share a pattern of sensory –neural loss with no detectable lesion. The age of onset and the gradual deterioration are remarkable. It seems that this is a new category of sensory –neural haring loss which deserves more attention.
Carlos H.M. da, Silva; Isabel C.R.G., Roscoe; Karla P., Fernandes; Ricardo M., Novaes; Carolina S., Lázari.
Full Text Available Objetivo: a doença de Kawasaki (DK) é uma vasculite sistêmica idiopática, autolimitada, de pequenos e médios vasos. Foram descritos na literatura treze casos de deficiência auditiva neurossensorial, durante a evolução dessa doença. Descreve-se o caso de um lactente com doença de Kawasaki com evoluçã [...] o, durante a fase aguda, para deficiência auditiva neurossensorial. A descrição do caso justifica-se por ilustrar uma complicação grave da DK, pouco mencionada na literatura, que reforça a recomendação de cautela na avaliação global destes pacientes. Descrição: menino hígido de 1 ano e sete meses de idade apresentou-se com febre diária persistente, iniciada havia sete dias, associada à irritabilidade, conjuntivite bilateral não-exsudativa, eritema máculo-papular em tronco. Evoluiu com artrite em punhos, cotovelos, joelhos e tornozelos e edema e descamação de mãos e pés, que impossibilitava a deambulação. O diagnóstico de doença de Kawasaki foi estabelecido de acordo com os critérios da American Heart Association (AHA), e a criança foi tratada de forma convencional. Houve regressão das manifestações clínicas três dias após o início do tratamento. Contudo, um mês após o início dos sintomas, os familiares notaram resposta insatisfatória a estímulos sonoros. A avaliação da acuidade auditiva através do BERA (Brainstem Evoked Responses Audiometry - Audiometria de Potenciais Evocados de Tronco Cerebral) diagnosticou perda auditiva neurossensorial bilateral, grau severo a profundo. Comentários: é possível que o exame rotineiro de acuidade auditiva em crianças com doença de Kawasaki possa identificar precocemente a deficiência auditiva neurossensorial. Abstract in english Objective: Kawasaki disease is a systemic idiopathic self-limited vasculitis of small and medium-sized vessels. Thirteen cases of sensorineural hearing loss during the evolution of this disease have been described in the literature. We describe a case of an infant with Kawasaki disease who developed [...] sensorineural hearing loss during the acute phase. This case report shows a complication of Kawasaki disease, with few citations in literature, enhancing the importance of careful evaluation of these patients.Description: nineteen-month-old-boy, formerly healthy, with persistent daily fever seven days before admission, associated with irritability, bilateral nonexudative conjunctivitis and maculopapular erythema on his trunk. There was later development of arthritis on wrists, elbows, knees, and ankles, and swelling associated with desquamation of hands and feet, which prevented him from walking. The diagnosis of Kawasaki disease was established according to the American Heart Association's criteria, and the child was conventionally treated. There was regression of clinical manifestations three days after the beginning of treatment. However, one month after the onset of symptoms, the family noticed an unsatisfactory response to sound stimuli. The evaluation of auditory acuity through BERA (Brainstem Evoked Responses Audiometry) revealed severe bilateral sensorineural hearing loss.Comments: routine examination of auditory acuity in children with Kawasaki disease may help identify sensorineural hearing loss at an early stage.
Adaptação transcultural de um instrumento de avaliação do handicap auditivo para portadores de perda auditiva induzida pelo ruído ocupacional Transcultural adaptation of an instrument to evaluate hearing handicap in workers with noise-induced hearing loss
Wanessa Tenório Gonçalves Holanda
Full Text Available A Perda Auditiva Induzida pelo Ruído Ocupacional (PAIRO é uma doença crônica e irreversível resultante da exposição a elevados níveis de ruído no trabalho que, mesmo no estágio inicial, pode comprometer em vários graus a qualidade de vida do trabalhador. Não existia disponível para a língua portuguesa um instrumento específico de avaliação das implicações psicossociais para portadores de PAIRO. O objetivo desse trabalho foi realizar a adaptação transcultural de um instrumento de avaliação do handicap auditivo da língua original para o português e avaliar sua confiabilidade e validade. O instrumento selecionado passou por um processo de equivalência semântica, que envolveu as etapas de tradução, retradução, apreciação formal da equivalência, pré-teste e crítica final por uma equipe multiprofissional para a elaboração da versão final para uso corrente no Brasil. A Escala de Inabilidades e Handicap Auditivo obteve medidas psicométricas consideradas, em geral, aceitáveis, considerando o tamanho reduzido da amostra e o fato de os participantes não possuírem perdas auditivas muito acentuadas. Portanto, tal escala precisa ser testada em amostras maiores e representativas de trabalhadores brasileiros portadores de PAIRO, a fim de ser ratificada a sua utilidade para a avaliação do handicap auditivo nessa população.The noise-induced hearing loss (NIHL is a chronical and irreversible disease resulting of the exposure to noise in high levels at work. Even in the beginning, this hearing loss can damage in many degrees the worker's quality of life. Before this study, there wasn't an instrument, in Portuguese, to evaluate the psychosocial disadvantages of workers with NIHL. The aim of this research was to make a transcultural adaptation of an especific instrument to evaluate the hearing handicap from the original language to Portuguese, and check the reliability and legitimacy. The selected instrument passed by a process of semantic equivalence that was conducted in five stages: translation, back translation, critical appraisal of the versions, pre-test and a final review by a multiprofessional group to develop a consensual version of the instrument for current use in Brazil. The instrument called "Inabilities Scale and Hearing Handicap" had, in general, acceptable psychometrical measures, considering the little size of the sample and the fact that workers' hearing loss weren't too significant. Therefore, the Portuguese version of this instrument needs to be further tested in a representative sample of Brazilian workers with NIHL to ratify its utility in order to evaluate hearing handicap in this population.
Adaptação transcultural de um instrumento de avaliação do handicap auditivo para portadores de perda auditiva induzida pelo ruído ocupacional / Transcultural adaptation of an instrument to evaluate hearing handicap in workers with noise-induced hearing loss
Wanessa Tenório Gonçalves, Holanda; Maria Luiza Carvalho de, Lima; José Natal, Figueiroa.
Full Text Available A Perda Auditiva Induzida pelo Ruído Ocupacional (PAIRO) é uma doença crônica e irreversível resultante da exposição a elevados níveis de ruído no trabalho que, mesmo no estágio inicial, pode comprometer em vários graus a qualidade de vida do trabalhador. Não existia disponível para a língua portugu [...] esa um instrumento específico de avaliação das implicações psicossociais para portadores de PAIRO. O objetivo desse trabalho foi realizar a adaptação transcultural de um instrumento de avaliação do handicap auditivo da língua original para o português e avaliar sua confiabilidade e validade. O instrumento selecionado passou por um processo de equivalência semântica, que envolveu as etapas de tradução, retradução, apreciação formal da equivalência, pré-teste e crítica final por uma equipe multiprofissional para a elaboração da versão final para uso corrente no Brasil. A Escala de Inabilidades e Handicap Auditivo obteve medidas psicométricas consideradas, em geral, aceitáveis, considerando o tamanho reduzido da amostra e o fato de os participantes não possuírem perdas auditivas muito acentuadas. Portanto, tal escala precisa ser testada em amostras maiores e representativas de trabalhadores brasileiros portadores de PAIRO, a fim de ser ratificada a sua utilidade para a avaliação do handicap auditivo nessa população. Abstract in english The noise-induced hearing loss (NIHL) is a chronical and irreversible disease resulting of the exposure to noise in high levels at work. Even in the beginning, this hearing loss can damage in many degrees the worker's quality of life. Before this study, there wasn't an instrument, in Portuguese, to [...] evaluate the psychosocial disadvantages of workers with NIHL. The aim of this research was to make a transcultural adaptation of an especific instrument to evaluate the hearing handicap from the original language to Portuguese, and check the reliability and legitimacy. The selected instrument passed by a process of semantic equivalence that was conducted in five stages: translation, back translation, critical appraisal of the versions, pre-test and a final review by a multiprofessional group to develop a consensual version of the instrument for current use in Brazil. The instrument called "Inabilities Scale and Hearing Handicap" had, in general, acceptable psychometrical measures, considering the little size of the sample and the fact that workers' hearing loss weren't too significant. Therefore, the Portuguese version of this instrument needs to be further tested in a representative sample of Brazilian workers with NIHL to ratify its utility in order to evaluate hearing handicap in this population.
Giovana S. Baraldi
Full Text Available Com o avanço da idade cresce o número de doenças crônicas sendo a hipertensão arterial sistêmica (HAS e a perda auditiva de grande prevalência na população idosa. OBJETIVO: Comparar e analisar os resultados de anamnese e audiometria tonal limiar de pacientes idosos hipertensos e não-hipertensos. FORMA DE ESTUDO: Estudo de coorte contemporânea transversal. MATERIAL E MÉTODO: Este estudo foi realizado na UNIFESP no período de março a novembro de 2003. Foram avaliados através de anamnese e audiometria tonal limiar 70 idosos, com idade entre 60 e 92 anos, sendo 15 do sexo masculino e 54 do sexo feminino. RESULTADOS: Quanto aos achados audiológicos dos grupos estudados pode-se observar diferença com relação à configuração audiométrica do tipo rampa e a queixa de "zumbido", ambas mais freqüentes no grupo dos idosos não-hipertensos. CONCLUSÃO: Os idosos hipertensos não apresentaram maior déficit auditivo, sendo o grau de perda de audição semelhante nos dois grupos. A configuração audiométrica predominante no grupo de idosos hipertensos foi do tipo plana, enquanto que nos não-hipertensos foi do tipo rampa. Com relação às queixas audiológicas, o grupo de não-hipertensos apresentou maior ocorrência da queixa "zumbido".As the age advances, the number of chronic diseases also grows, the systemic arterial hypertension (SAH and hearing loss having a significant prevalence in aged people. OBJECTIVE: To compare and analyze anamnesis and threshold tonal audiometry results in both hypertensive and non-hypertensive patients. STUDY DESIGN: Transversal contemporany cohort study. MATERIAL AND METHOD: This study has been conducted at UNIFESP in the period from March to November 2003. Seventy people in the age group from 60 to 92 - 15 male and 54 female - were evaluated through anamnesis and threshold tonal audiometry. RESULTS: As to audiology findings of groups studied, a difference can be noted regarding "ramp-typed" audiometric configuration and buzz claim, both occurring most frequently in non-hypertensive aged people. CONCLUSION: Hypertensive aged people did not present a higher hearing deficit, the degree of hearing loss being similar in both groups. Prevailing audiometric configuration in hypertensive group was that of "full-type", while the non-hypertensive group presented a "ramp-typed" configuration. As to audiologic claims, the non-hypertensive group presented an increased occurrence of "buzz" claim.
Cronin, Scott; Lin, Austin; Thompson, Kelsey; Hoenerhoff, Mark; Duncan, R Keith
Cyclodextrins are simple yet powerful molecules widely used in medicinal formulations and industry for their ability to stabilize and solubilize guest compounds. However, recent evidence shows that 2-hydroxypropyl-?-cyclodextrin (HP?CD) causes severe hearing loss in mice, selectively killing outer hair cells (OHC) within 1 week of subcutaneous drug treatment. In the current study, the impact of HP?CD on auditory physiology and pathology was explored further as a function of time and route of administration. When administered subcutaneously or directly into cerebrospinal fluid, single injections of HP?CD caused up to 60 dB threshold shifts and widespread OHC loss in a dose-dependent manner. Combined dosing caused no greater deficit, suggesting a common mode of action. After drug treatment, OHC loss progressed over time, beginning in the base and extending toward the apex, creating a sharp transition between normal and damaged regions of the cochlea. Administration into cerebrospinal fluid caused rapid ototoxicity when compared to subcutaneous delivery. Despite the devastating effect on the cochlea, HP?CD was relatively safe to other peripheral and central organ systems; specifically, it had no notable nephrotoxicity in contrast to other ototoxic compounds like aminoglycosides and platinum-based drugs. As cyclodextrins find expanding medicinal applications, caution should be exercised as these drugs possess a unique, poorly understood, ototoxic mechanism. PMID:26055150
McAuliffe, Megan J.; Wilding, Phillipa J.; Rickard, Natalie A.; O'Beirne, Greg A.
Purpose: Older adults exhibit difficulty understanding speech that has been experimentally degraded. Age-related changes to the speech mechanism lead to natural degradations in signal quality. We tested the hypothesis that older adults with hearing loss would exhibit declines in speech recognition when listening to the speech of older adults,…
The present experiments were undertaken in order to characterize the hearing loss associated with 1,1,2-trichloroethylene (TCE) exposure. dult male LE rats were exposed to TCE via inhalation (whole body) for 6hr/day for 5 days. he concentration-effect function (0-4000 ppm) was de...
Holland, Nicholas V., III
Researchers have reported public school band directors as experiencing noise-induced hearing loss. Little research has focused on collegiate band directors and university student musicians. The present study measures the sound pressure levels generated within a university concert band and compares sound levels with the criteria set by the…
Deborah Grace Dias, Fernandes; Pâmella Carine de, Sousa; Letícia Pimenta, Costa-Guarisco.
Full Text Available Objetivo verificar quais aspectos da configuração audiométrica influenciam a discriminação de fala nas perdas auditivas neurossensoriais descendentes. Métodos foi realizado um levantamento de prontuários hospitalar dos pacientes atendidos no Serviço de Atenção à Saúde Auditiva, no período de ma [...] rço a julho de 2011, selecionando-se indivíduos com perdas auditivas neurossensoriais descendentes de grau leve a severo com idade superior a 18 anos. A perda auditiva foi considerada descendente quando a diferença entre as médias das frequências de 0,25 a 2 kHz e 3 a 8 kHz foi maior que 15 dBNA. A partir deste levantamento a amostra do estudo foi composta por 30 pacientes (55 orelhas) sendo 19 homens e 11 mulheres, com idades compreendidas entre 26 e 91 anos. Com base na avaliação audiológica realizada previamente, os testes de reconhecimento de fala foram correlacionados com diferentes médias de limiares tonais, incluindo as frequências de 0,5 a 4 kHz. Além disso, estudou-se as diferenças dos limiares auditivos tonais entre oitavas de frequências, ou seja, o grau de inclinação das curvas audiométricas, e o seu impacto na discriminação de fala. Resultados encontrou-se ótima correlação entre os limiares médios de 0,5 a 4 kHz com a discriminação de fala, sendo essa correlação mais forte com a inclusão das frequências de 3 e 4 kHz na média tonal. No entanto, o aumento da diferença do limiar auditivo entre as oitavas de frequências, que implica em uma maior inclinação da curva audiométrica com queda acentuada nas frequências altas, não interferiu de forma significante nos testes de reconhecimento de fala. Conclusão com base nos resultados deste estudo, pode-se concluir que as frequências de 3 e 4 kHz contribuem para a inteligibilidade de fala. Abstract in english Purpose to determine which aspects of the audiometric configuration influence speech recognition in ski slop sensorineural hearing loss. Methods a survey of hospital records of patients treated at the Hearing Health Care in the period from March to July 2011 was performed selecting individuals [...] above 18 years old and ski slop sensorineural hearing loss from mild to severe degree, with difference between the means of the frequencies of 0.25 to 2 kHz and 3-8 kHz greater than 15 dB HL. The sample of the study consisted of 30 patients (55 ears), 19 men and 11 women, aged between 26 and 91 years. Based on audiological evaluation, tests of speech recognition were correlated with different average hearing thresholds, including frequencies from 0,5 to 4 kHz. Furthermore, the differences in auditory thresholds between octave frequencies was studied and its impact on speech discrimination. Results excellent correlation was found between the mean thresholds from 0,5 to 4 kHz with speech discrimination, this correlation being stronger with the inclusion of the frequencies of 3 and 4 kHz in tone average. However, increasing the difference in hearing threshold between octaves of frequencies, which implies a ski slop, did not interfere significantly on tests of speech recognition. Conclusions based on the results of this study, we can conclude that the frequencies of 3 kHz and 4 kHz contribute to the speech intelligibility.
Full Text Available Abstract Background Tinnitus is an auditory sensation frequently following hearing loss. After cochlear injury, deafferented neurons become sensitive to neighbouring intact edge-frequencies, guiding an enhanced central representation of these frequencies. As psychoacoustical data 123 indicate enhanced frequency discrimination ability for edge-frequencies that may be related to a reorganization within the auditory cortex, the aim of the present study was twofold: 1 to search for abnormal auditory mismatch responses in tinnitus sufferers and 2 relate these to subjective indicators of tinnitus. Results Using EEG-mismatch negativity, we demonstrate abnormalities (N = 15 in tinnitus sufferers that are specific to frequencies located at the audiometrically normal lesion-edge as compared to normal hearing controls (N = 15. Groups also differed with respect to the cortical locations of mismatch responsiveness. Sources in the 90–135 ms latency window were generated in more anterior brain regions in the tinnitus group. Both measures of abnormality correlated with emotional-cognitive distress related to tinnitus (r ~ .76. While these two physiological variables were uncorrelated in the control group, they were correlated in the tinnitus group (r = .72. Concerning relationships with parameters of hearing loss (depth and slope, slope turned out to be an important variable. Generally, the steeper the hearing loss is the less distress related to tinnitus was reported. The associations between slope and the relevant neurophysiological variables are in agreement with this finding. Conclusions The present study is the first to show near-to-complete separation of tinnitus sufferers from a normal hearing control group based on neurophysiological variables. The finding of lesion-edge specific effects and associations with slope of hearing loss corroborates the assumption that hearing loss is the basis for tinnitus development. It is likely that some central reorganization follow a damage to hearing receptors, even though the paradoxical results indicate that they most likely are somewhat different than originally assumed (see Background. One partial explanation might lie in the involvement of top-down (presumably frontal-lobe controlled processes. A better comprehension of the exact mechanisms leading to the present results could have a broad impact on the understanding and perhaps treatment of tinnitus.
Convery, Elizabeth; Keidser, Gitte; Dillon, Harvey; Hartley, Lisa
The need for reliable access to hearing health care services is growing globally, particularly in developing countries and in remotely located, underserved regions in many parts of the developed world. Individuals with hearing loss in these areas are at a significant disadvantage due to the scarcity of local hearing health care professionals and the high cost of hearing aids. Current approaches to making hearing rehabilitation services more readily available to underserved populations include...
Schmidt, Jesper Hvass; Pedersen, Ellen R
The objectives of this study were to: (1) estimate the hearing status of classical symphony orchestra musicians and (2) investigate the hypothesis that occupational sound exposure of symphony orchestra musicians leads to elevated hearing thresholds
Willott, James F.
Mice of the C57BL/6J (B6) inbred strain exhibit genetic progressive sensorineural hearing loss and have been widely used as a model of adult-onset hearing loss and presbycusis. Males and females exhibit similar degrees of hearing loss until about 3 months of age, after which, the loss accelerates in females. This paper reviews research on how the B6 auditory system is affected by sex, gonadectomy (i.e., a reduction of gonadal hormone levels), and nightly exposure to moderately intense augment...
Woodcock, Kathryn; Pole, Jason D
Communication is essential to both educational attainment and labour force participation. Deafness--both the disability and the culture--creates a communication barrier. The objective of this study is to profile the educational attainment, labour force status and injury profile of deaf and hard-of-hearing Canadians in relation to the population as a whole. Using data from the Canada Community Health Survey 1.1, a cross-sectional survey conducted by Statistics Canada with a total of 131,535 respondents, a series of logistic regression models were fitted to estimate the odds of reporting the presence of educational attainment, labour force status and injury, and being classified as having a hearing problem. For each odds ratio, 95% confidence intervals are provided. All analyses were adjusted for age and sex with some analyses being restricted to appropriate age ranges or having further adjustments made, depending on the outcome. Approximately 4% of the respondents were considered to have a hearing problem. The prevalence of hearing problems increases with age and men have a slightly higher prevalence of hearing problems compared with women (4.52 vs. 3.53%). Respondents classified as having a hearing problem, whether hearing loss or deafness, were more likely to have achieved less education, less likely to be working and experience higher rates of injury and work-related injury compared with hearing respondents. These results underscore the need to equalize access to education and employment and assure the accessibility to workplace safety and wellness for this minority group. PMID:19008678
CT and MRI are complementary studies that have proven to be the best radiological tools in screening of children with unilateral or bilateral sensorineural hearing loss. Only about a 20% of the patients with congenital sensor neural hearing loss have manifestations in images. Due to the fact that most of these manifestations initiate in the bone, the CT is the first line of image study. MRI is indicated in the evaluation of suspected agenesis, neuropathy, aplasia or hypoplasia of the vestibulocochlear nerve, often associated with this type of hearing loss. We present a case of a 6 year old patient with deep bilateral sensor neural hearing loss, with radiological studies to determine a potential candidate for a cochlear or auditory brainstem implant as hearing rehabilitation.
Transient otoacustic emissions with tone pip in individuals with sensorineural hearing loss / Emissões otoacústicas transitórias com estímulo tone pip em indivíduos portadores de perda auditiva neurossensorial
Thays Bueno, Takeda; Daniela, Gil.
Full Text Available As Emissões Otoacústicas são sons gerados pela cóclea em resposta a um estímulo sonoro. Podem ser geradas por estímulos clique ou por frequência específica, como tone pip. É um procedimento rápido e objetivo com inúmeras aplicações. OBJETIVO: Verificar a influência do estímulo nas Emissões Otoacústi [...] cas em indivíduos com perda auditiva neurossensorial de grau leve e moderado com configuração audiométrica descendente. MATERIAL E MÉTODO: Foram selecionados 32 indivíduos de ambos os gêneros, entre 17 e 63 anos, com perda auditiva neurossensorial de grau leve e moderado com configuração audiométrica descendente. Foi realizada a emissão otoacústica com clique e tone pip em 2.000Hz e 4.000Hz. RESULTADOS: O grau de deficiência auditiva e o gênero influenciaram na obtenção das emissões, sendo significante para o clique e tone pip de 2.000Hz, apresentando equivalência de respostas entre os estímulos e maior ausência de emissões no gênero feminino. CONCLUSÃO: As emissões otoacústicas com estímulo clique coincidem com as emissões com estímulo tone pip na frequência de 2.000Hz. Nos indivíduos com perda auditiva nas frequências altas, o tone pip de 4.000Hz mostrou-se mais sensível que o clique. Influenciaram na obtenção das emissões o gênero e o grau da perda auditiva. Abstract in english Otoacoustic Emissions are generated by the cochlea in response to sound stimuli. They can be generated by clicks or specific frequency stimuli, such as tone pips. This is a quick and objective test with several applications. OBJECTIVE: To investigate the influence of the type of stimulus achieving o [...] toacoustic emissions in individuals with mild and moderate sensorineural hearing loss of sloping configuration. MATERIAL AND METHOD: Thirty-two male and female patients aged from 17 to 63 years, with symmetric sensorineural hearing loss with a sloping configuration were evaluated. All subjects underwent transient otoacoustic emissions testing elicited by clicks and 2.000Hz and 4.000Hz tone pips. RESULTS: The degree of hearing loss and gender influenced otoacoustic emissions; it was significant for click stimulus and tone pips at 2.000Hz. Emissions were absent more often in females with both procedures. CONCLUSIONS: Otoacoustic emissions evoked with clicks coincided with the emissions of tone pips at 2.000Hz. Tone pips at 4.000Hz were more sensitive than clicks for detecting impairment in individuals with high frequencies hearing loss. Gender and the degree of hearing loss ere factors that affected OAE registration.
Transient otoacustic emissions with tone pip in individuals with sensorineural hearing loss Emissões otoacústicas transitórias com estímulo tone pip em indivíduos portadores de perda auditiva neurossensorial
Thays Bueno Takeda
Full Text Available Otoacoustic Emissions are generated by the cochlea in response to sound stimuli. They can be generated by clicks or specific frequency stimuli, such as tone pips. This is a quick and objective test with several applications. OBJECTIVE: To investigate the influence of the type of stimulus achieving otoacoustic emissions in individuals with mild and moderate sensorineural hearing loss of sloping configuration. MATERIAL AND METHOD: Thirty-two male and female patients aged from 17 to 63 years, with symmetric sensorineural hearing loss with a sloping configuration were evaluated. All subjects underwent transient otoacoustic emissions testing elicited by clicks and 2.000Hz and 4.000Hz tone pips. RESULTS: The degree of hearing loss and gender influenced otoacoustic emissions; it was significant for click stimulus and tone pips at 2.000Hz. Emissions were absent more often in females with both procedures. CONCLUSIONS: Otoacoustic emissions evoked with clicks coincided with the emissions of tone pips at 2.000Hz. Tone pips at 4.000Hz were more sensitive than clicks for detecting impairment in individuals with high frequencies hearing loss. Gender and the degree of hearing loss ere factors that affected OAE registration.As Emissões Otoacústicas são sons gerados pela cóclea em resposta a um estímulo sonoro. Podem ser geradas por estímulos clique ou por frequência específica, como tone pip. É um procedimento rápido e objetivo com inúmeras aplicações. OBJETIVO: Verificar a influência do estímulo nas Emissões Otoacústicas em indivíduos com perda auditiva neurossensorial de grau leve e moderado com configuração audiométrica descendente. MATERIAL E MÉTODO: Foram selecionados 32 indivíduos de ambos os gêneros, entre 17 e 63 anos, com perda auditiva neurossensorial de grau leve e moderado com configuração audiométrica descendente. Foi realizada a emissão otoacústica com clique e tone pip em 2.000Hz e 4.000Hz. RESULTADOS: O grau de deficiência auditiva e o gênero influenciaram na obtenção das emissões, sendo significante para o clique e tone pip de 2.000Hz, apresentando equivalência de respostas entre os estímulos e maior ausência de emissões no gênero feminino. CONCLUSÃO: As emissões otoacústicas com estímulo clique coincidem com as emissões com estímulo tone pip na frequência de 2.000Hz. Nos indivíduos com perda auditiva nas frequências altas, o tone pip de 4.000Hz mostrou-se mais sensível que o clique. Influenciaram na obtenção das emissões o gênero e o grau da perda auditiva.
Fatores prognósticos em perda auditiva neurossensorial súbita: estudo retrospectivo usando efeitos de interação / Prognostic factors in sudden sensorineural hearing loss: a retrospective study using interaction effects
Chin-Saeng, Cho; Young-Jin, Choi.
Full Text Available O significado prognóstico de vertigem em pacientes com perda auditiva neurossensorial súbita idiopática (PANSI) continua a ser uma questão controversa. OBJETIVO: Este trabalho tem como objetivo verificar a diferença entre um grupo com vertigem e um grupo sem vertigem e analisar a validação da vertig [...] em como fator prognóstico em pacientes com PANSI. MÉTODO:Este estudo envolveu 183 pacientes com PANSI. O teste t foi utilizado para comparar o grupo A (PANSI com vertigem, n = 31) e o grupo B (PANSI sem vertigem, n = 152). Também queremos verificar os efeitos de interação entre vertigem e outros fatores prognósticos por meio de análise de regressão múltipla. RESULTADOS: Houve uma diferença significativa entre o grupo A e o grupo B: o nível auditivo inicial do grupo A foi menor do que no grupo B, e seu início de tratamento também foi menor. Além disso, a vertigem em si não afetou a melhora da audição, mas a variável de interação entre vertigem e nível de audição inicial afetou significativamente a melhora da audição. CONCLUSÃO: As características clínicas dos pacientes com vertigem não afetaram diretamente a melhora da audição de pacientes com PANSI; no entanto, vertigem teve uma influência sobre a PANSI por meio de sua interação com os níveis iniciais de audição. Abstract in english The prognostic significance of vertigo in patients with idiopathic sudden sensorineural hearing loss (SSNHL) remains a matter of debate. OBJECTIVE: This paper aims to verify the difference between a group with vertigo and a group without vertigo, and to analyze vertigo's validation as a prognostic f [...] actor in patients with SSNHL. METHOD: This study involved 183 patients with SSNHL. A t-test was used to compare group A (SSNHL with vertigo, n = 31) and group B (SSNHL without vertigo, n = 152). Also we want to verify the interaction effects between vertigo and other prognostic factors using multiple regression analysis. RESULTS: There was a significant difference between group A and group B: the initial hearing level of group A was lower than group B, and their treatment onset was also shorter. In addition, vertigo itself didn't affect hearing improvement, but the interaction variable between vertigo and initial hearing level did affect hearing improvement significantly. CONCLUSION: The clinical characteristics of patients with vertigo did not directly affect hearing improvement with SSNHL; however, vertigo had an influence on SSNHL though its interaction with the initial hearing levels.
HomØe, Preben; Andersen, Ture
OBJECTIVE: Cochlear implant (CI) treatment was introduced to the world in the 1980s and has become a routine treatment for congenital or acquired severe-to-profound hearing loss. CI treatment requires access to a highly skilled team of ear, nose and throat specialists, audiologists and speech-language pathologists for evaluation, surgery and rehabilitation. In particular, children treated with CI are in need of long-term post-operative auditory training and other follow-up support. DESIGN: The study is retrospective with updated information on present performance. RESULTS: Since 2001, a total of 11 Greenlandic patients living in Greenland have been treated with CI, 7 children and 4 adults. Of these children, 4 use oral communication only and are full-time CI-users, 2 with full-time use of CI are still in progress with use of oral communication, and 1 has not acquired oral language yet, but has started auditory and speech training. Six children attend mainstream public school while one child is in kindergarten. Of the adults, only 1 has achieved good speech perception with full-time use of CI while 3 do not use the CI. DISCUSSION: From an epidemiological point of view, approximately 1-3 children below 6 years are in need of a CI every second year in Greenland often due to sequelae from meningitis, which may cause postinfectious deafness. Screening of new-borns for hearing has been started in Greenland establishing the basis for early diagnosis of congenital hearing impairment and subsequent intervention. The logistics and lack of availability of speech therapists in Greenland hampers possibilities for optimal language and speech therapy of CI patients in Greenland. This study aims at describing the results of CI treatment in Greenlanders and the outcome of the CI operations along with the auditory and speech/language outcomes. Finally, we present a suggestion for the future CI treatment and recommendations for an increased effort in the treatment and rehabilitation of implanted patients in Greenland.
Full Text Available Objective. Cochlear implant (CI treatment was introduced to the world in the 1980s and has become a routine treatment for congenital or acquired severe-to-profound hearing loss. CI treatment requires access to a highly skilled team of ear, nose and throat specialists, audiologists and speech-language pathologists for evaluation, surgery and rehabilitation. In particular, children treated with CI are in need of long-term post-operative auditory training and other follow-up support. Design. The study is retrospective with updated information on present performance. Results. Since 2001, a total of 11 Greenlandic patients living in Greenland have been treated with CI, 7 children and 4 adults. Of these children, 4 use oral communication only and are full-time CI-users, 2 with full-time use of CI are still in progress with use of oral communication, and 1 has not acquired oral language yet, but has started auditory and speech training. Six children attend mainstream public school while one child is in kindergarten. Of the adults, only 1 has achieved good speech perception with full-time use of CI while 3 do not use the CI. Discussion. From an epidemiological point of view, approximately 1–3 children below 6 years are in need of a CI every second year in Greenland often due to sequelae from meningitis, which may cause postinfectious deafness. Screening of new-borns for hearing has been started in Greenland establishing the basis for early diagnosis of congenital hearing impairment and subsequent intervention. The logistics and lack of availability of speech therapists in Greenland hampers possibilities for optimal language and speech therapy of CI patients in Greenland. This study aims at describing the results of CI treatment in Greenlanders and the outcome of the CI operations along with the auditory and speech/language outcomes. Finally, we present a suggestion for the future CI treatment and recommendations for an increased effort in the treatment and rehabilitation of implanted patients in Greenland.
Cresio, Alves; Conceição Silva, Oliveira.
Full Text Available INTRODUÇÃO: A síndrome de Turner (ST) é causada por uma deleção total ou parcial de um cromossomo X, ocorrendo em 1:2.000 até 1:5.000 meninas nascidas vivas. A perda auditiva é uma de suas principais manifestações clinicas. Entretanto, existem poucos estudos na literatura descrevendo essa associaç [...] ão. OBJETIVO: Rever o conhecimento atual sobre a epidemiologia, etiologia, manifestações clínicas e diagnósticas da deficiência auditiva em pacientes com ST. MÉTODOS: A pesquisa bibliográfica, realizada entre 1980-2012, utilizou os bancos de dados Medlinee Lilacs identificando os principais artigos que relataram associação entre ST e deficit auditivo e suas repercussões clínicas. CONCLUSÕES: Otite média de repetição, disfunção das trompas de Eustáquio, perdas auditivas condutivas durante a infância e perdas auditivas sensorioneurais a partir da adolescência são os distúrbios audiológicos mais comuns na ST. O cariótipo parece ter relação com a perda auditiva, com estudos mostrando aumento da prevalência de perda auditiva em pacientes com monossomia 45,X e isocromossomos 46,i(Xq). Estudos morfológicos da cóclea são necessários para ajudar a esclarecer a etiologia da perda auditiva sensorioneural. Abstract in english INTRODUCTION: Turner's syndrome (TS) is caused by a partial or total deletion of an X chromosome, occurring in 1:2,000 to 1:5,000 live born females. Hearing loss is one of its major clinical manifestations. However, there are few studies investigating this problem. OBJECTIVES: To review the cu [...] rrent knowledge regarding the epidemiology, etiology, clinical manifestations and diagnosis of hearing impairment in patients with TS. METHODS: A bibliographic search was performed in the Medline and Lilacs databanks (1980-2012) to identify the main papers associating Turner's syndrome, hearing impairment and its clinical outcomes. CONCLUSIONS: Recurrent otitis media, dysfunction of the Eustachian tube, conductive hearing loss during infancy and sensorineural hearing loss in adolescence are the audiologic disorders more common in ST. The karyotype appears to be important in the hearing loss, with studies demonstrating an increased prevalence in patients with monosomy 45,X or isochromosome 46,i(Xq). Morphologic studies of the cochlea are necessary to help out in the clarifying the etiology of the sensorineural hearing loss.
Vestibular Evoked Myogenic Potential Produced by Bone-Conducted Stimuli: A Study on its Basics and Clinical Applications in Patients With Conductive and Sensorineural Hearing Loss and a Group With Vestibular Schawannoma
Full Text Available Introduction: Vestibular evoked myogenic potential (VEMP has recently been broadly studied in vestibular disorders. As it is evoked by loud sound stimulation, even mild conductive hearing loss may affect VEMP results. Bone-conducted (BC stimulus is an alternative stimulation for evoking this response. This study aims to assess the characteristics of BC-VEMP in different groups of patients. Materials and Methods: We performed a cross sectional analysis on 20 healthy volunteers with normal pure-tone audiometry as a control group; and on a group of patients consisted of 20 participants with conductive hearing loss, five with bilateral sensorineural hearing loss and four with vestibular schawannoma. AC and BC-VEMP were performed in all participants. Results: In control group the VEMP responses to both kinds of stimuli had an acceptable morphology and consisted of p13 and n23 waves. Latency value of these main components in each type of stimulus was not significantly different (P>0.05. However, the mean amplitude was larger in BC modality than AC stimulation (P=0.025. In the group with conductive hearing loss, the VEMP response was absent in fifteen (46.87% of the 32 ears using the AC method, whereas all (100% displayed positive elicitability of VEMP by BC method. Normal VEMP responses in both stimuli were evoked in all patients with sensorineural hearing loss. In patients with unilateral vestibular schwannomas (VS, 2 (50.00% had neither AC-VEMP nor BC-VEMP. Conclusion: Auditory stimuli delivered by bone conduction can evoke VEMP response. These responses are of vestibular origin and can be used in vestibular evaluation of patients with conductive hearing loss.
Kale, Sushrut; Micheyl, Christophe; Heinz, Michael G.
Listeners with sensorineural hearing loss (SNHL) often show poorer thresholds for fundamental-frequency (F0) discrimination, and poorer discrimination between harmonic and frequency-shifted (inharmonic) complex tones, than normal-hearing (NH) listeners—especially when these tones contain resolved or partially resolved components. It has been suggested that these perceptual deficits reflect reduced access to temporal-fine-structure (TFS) information, and could be due to degraded phase-locking in the auditory nerve (AN) with SNHL. In the present study, TFS and temporal-envelope (ENV) cues in single AN-fiber responses to bandpass-filtered harmonic and inharmonic complex tones were measured in chinchillas with either normal hearing or noise-induced SNHL. The stimuli were comparable to those used in recent psychophysical studies of F0 and harmonic/inharmonic discrimination. As in those studies, the rank of the center component was manipulated to produce different resolvability conditions, different phase relationships (cosine and random phase) were tested, and background noise was present. Neural TFS and ENV cues were quantified using cross-correlation coefficients computed using shuffled cross-correlograms between neural responses to REF (harmonic) and TEST (F0- or frequency-shifted) stimuli. In animals with SNHL, AN-fiber tuning curves showed elevated thresholds, broadened tuning, best-frequency shifts, and downward shifts i