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Hearing Status in Neonatal Hyperbilirubinemia by Auditory Brain Stem Evoked Response and Transient Evoked Otoacoustic Emission  [PDF]
Mohammad Hossein Baradaranfar,Saeid Atighechi,Mohammad Hossein Dadgarnia,Rozita Jafari
Acta Medica Iranica , 2011,
Abstract: Hyperbilirubinemia at neonatal period is one of the major deteriorating factors of the auditory system. If left untreated, it may cause certain cerebral damage. This study aims to evaluate the impact of hyperbilirubinemia on the hearing of neonate. This study was conducted on 35 newborn babies with jaundice (bilirubin more than 20 mg/dL). Auditory brainstem response (ABR) and transient evoked otoacoustic emission (TEOAE) tests were performed, after treatment and one year after. ABR test results indicated that 26 children (74.3%) had normal hearing but 9 (25.7%) suffered from an impairment. As for TEOAE test, 30 children (85.7%) passed whereas the remaining (14.3%) seemed to be failures. The comparative results of the two tests pointed to autonomic neuropathy /autonomic dysreflexia symptoms in 5 babies. Due to the high incidence of Autonomic neuropathy/autonomic dysreflexia among hyperbilirubinemic babies, screening in this regard seems reasonable. Our result emphasizes the necessity of more experiments on the afflicted areas.
Emiss es Otoacústicas Evocadas por Estímulo Transiente: protocolos de Triagem Auditiva Neonatal Transient evoked otoacoustic emissions (teoe): newborn hearing screening program protocols  [cached]
Isabela Freixo C?rtes-Andrade,Daniela Veronese Bento,Doris Ruthi Lewis
Revista CEFAC , 2012, DOI: 10.1590/s1516-18462012005000062
Abstract: OBJETIVO: descrever os resultados de três protocolos de EOAET de um equipamento automático utilizado em um Programa de TAN. MéTODO: o equipamento utilizado foi programado com três critérios diferenciados de passa/falha. Protocolo A: Passar em 4 bandas de frequência, n o precisando ser consecutivas; Protocolo B: Passar em 3 bandas de frequência, n o precisando ser consecutivas e Protocolo C: Passar em 2 bandas de frequência, n o precisando ser consecutivas. Os parametros para considerar presen a de respostas foram: reprodutibilidade acima de 50%, rela o sinal ruído > que 3dB em 1.0 e 1.5kHz e > 6dB em 2.0, 3.0 e 4.0kHz. RESULTADOS: 574 orelhas foram analisadas, sendo que as bandas de frequência de 2.0, 3.0 e 4.0kHz foram as que apresentaram percentuais de "passa" mais elevados (94,1; 95,8 e 92,7%, respectivamente). A banda de frequência de 1.0kHz obteve resposta presente em apenas 9,9% das orelhas testadas. Verificou-se que a análise do Protocolo C (2 bandas) foi a que apresentou o maior percentual de passa (96,9%). Porém este percentual n o é considerado estatisticamente diferente do Protocolo B, 3 bandas, (96,2%) com valor de p=0,520. Assim, ambas as bandas s o consideradas iguais, podendo-se utilizar qualquer uma das duas. Entretanto o Protocolo A (4 bandas) obteve 79,8% de percentual de passa, apresentando uma taxa de falha elevada (22,2%). CONCLUS ES: deve-se pesquisar, com o padr o-ouro, todos os protocolos para verifica o daquele com melhor sensibilidade e especificidade, apesar de terem apresentado resultados similares entre critérios de passa para 2 ou 3 bandas de frequência. PURPOSE: to describe the results of three TEOE protocols obtained from automatic equipment used in a Newborn Hearing Screening Program. METHOD: during two months, TEOEs of 287 neonates in S o Paulo were studied. To register them, we used a three-protocol, set up with different pass/fail criteria. The following protocols were registered: Protocol A: to pass in four frequency bands, not necessarily consecutive-; Protocol B: to pass in three frequency bands, not necessarily consecutive - and Protocol C: to pass in two frequency bands, not necessarily consecutive, as well. The parameters that we used to consider these answers were: reproducibility above 50%, as well as signal/noise ratio > 3dB at 1.0 and 1.5 kHz and > 6dB at 2.0, 3.0 and 4.0 kHz. RESULTS: TEOEs of 574 ears were analyzed and the 2.0, 3.0 and 4.0 frequencies showed the highest pass percentages (94.1, 95.8 and 92.7% for protocols A, B and C respectively). Protocol C showed the highest pass percentage, achieving
Newborn hearing screening with transient evoked otoacoustic emissions and automatic auditory brainstem response  [PDF]
Isabela de Souza Jardim,Carla Gentile Matas,Renata Mota Mamede de Carvallo
Einstein (S?o Paulo) , 2008,
Abstract: Objective: The aim of the present investigation was to check Transient Evoked Otoacoustic Emissions and Automatic Auditory Brainstem Response tests applied together in regular nurseries and Newborn Intensive Care Units (NICU), as well as to describe and compare the results obtained in both groups. Methods: We tested 150 newborns from regular nurseries and 70 from NICU. Rresults: The newborn hearing screening results using Transient Evoked Otoacoustic Emissions and Automatic Auditory Brainstem Response tests could be applied to all babies. The “pass” result for the group of babies from the nursery was 94.7% using Transient Evoked Otoacoustic Emissions and 96% using Automatic Auditory Brainstem Response. The newborn intensive care unit group obtained 87.1% on Transient Evoked Otoacoustic Emissions and 80% on the Automatic Auditory Brainstem Response, and there was no statistical difference between the procedures when the groups were evaluated individually. However, comparing the groups, Transient Evoked Otoacoustic Emissions were presented in 94.7% of the nursery babies and in 87.1% in the group from the newborn intensive care unit. Considering the Automatic Auditory Brainstem Response, we found 96 and 87%, respectively. Cconclusions: Transient Evoked Otoacoustic Emissions and Automatic Auditory Brainstem Response had similar “pass” and “fail” results when the procedures were applied to neonates from the regular nursery, and the combined tests were more precise to detect hearing impairment in the newborn intensive care unit babies.
Response level of the transient-evoked otoacoustic emissions on infants having a gastroesophageal reflux  [cached]
Camboim, Elizangela Dias,Scharlach, Renata Coelho,Farias, Kelvanio Vitório de,Oliveira, Lívia Karla Gadêlha de
International Archives of Otorhinolaryngology , 2011,
Abstract: Introduction: The transient-evoked otoacoustic emissions (TEOAE) have been the most widespread technique to perform neonatal hearing screening. Scrutinizing their measures by way of an association with other alterations that may impair the infant's auditory system is important. Objective: Analyze the incidence and the response levels of the transient-evoked otoacoustic emissions on infants having a physiological gastroesophageal reflux disease (GERD). Method: A prospective study was performed at Santa Juliana Hospital's Otorhinolaryngology Department. 118 prematurely-born and timely-born babies, from newly-born to 6 months old, who were sent by pediatricians and gastropediatricians, participated in the study and they were divided into two groups: Study Group: 63 infants clinically diagnosed of a physiological gastroesophageal reflux disease, and Control Group: 55 infants without a physiological gastroesophageal reflux. The peripheral hearing function was evaluated by both transient-evoked otoacoustic emissions and otoscopy examinations performed by an otorhinolaryngologist. Results: The average response levels of the transient-evoked otoacoustic emissions were higher in the non-reflux group for frequency bands of 2kHz, 2.5kHz, 3kHz, 3.5kHz and 4.5kHz bilaterally, with a statistically significant difference, achieving the average values of 7.71dB and 7dB in the right ear found in the frequency bands of 2 and 4kHz, respectively. Conclusion: There was a lower incidence and a lower response level of the transient-evoked otoacoustic emissions in physiological gastroesophageal reflux children in comparison with children having no reflux.
Transient and distortion product evoked otoacoustic emissions in premature infants  [cached]
Costa, Jovana Marteletto Denipoti,Almeida, Vanessa Furtado de,Oliveira, Carlos Augusto Costa Pires de,Sampaio, Andre Luiz Lopes
International Archives of Otorhinolaryngology , 2009,
Abstract: Introduction: The correlation between the transient (TEOE) and distortion product (DPOAE) evoked otoacoustic emissions may be useful for the neonatal auditory screening, mainly in premature infants, who have risk indicators for hearing deficiency. There is need for deepening the knowledge regarding this population cochlea features. Objective: To compare the TEOE and DPOAE in premature infants. To analyze the reproducibility in the TEOE, the amplitude and the sign/noise ratio in the TEOE and DPOAE. Method: TEOE and DPOAE were carried out in 50 premature infants. The tests were correlated as for the criterion "pass/failure" and compared according to amplitude and sign/noise ratio parameters. Results: The TEOE were present in 71% of the sample. The frequency of 3kHz presented a better performance in the average reproducibility, amplitude and sign/noise ratio. The DPOAE were present in 97% of the sample. The frequency of 2kHz had a major average amplitude, the values of the sign/noise ratio increased proportionally in the high frequencies. There was a strong correlation between TEOE and DPOAE in the "pass/failure" criterion (p=0.006). Conclusion: The correlation between the TEOE and DPOAE results was significant. But one method compliments the other and both may be used in the TAN.
Transient evoked otoacoustic emissions otologically in normal adults
Mowafaq Al-Qhaiwi
Nigerian Journal of Surgical Research , 2005,
Abstract: Objective: To examine the effects of aging on the existence of transient evoked otoacoustic emissions in normal adult. Material and methods: 40 subjects (30 males, 10 females) aged between 20-60 years were divided into 4 groups by representing. All patients were screened to insure otologically normal subjects based on history and otological examination and tympanometry. Examined was done in the KHMC between 1999-2000 using a manually Operated Madson Audiometer, and the IL 088 otodynamic Analyser was used to record transient otoacoustic emission. Results: The age groups were 20-30,31-40, 41-50, 51-60 years .There was no significant difference in threshold as a function of age at p<0.05 .The TEOAE amplitude as function of audiometric threshold between (0-20db hl) was not significant. Conclusion: Age appears to have no effect on TEOAE level when the degree at hearting is within normal. Nigerian Journal of Surgical Research Vol. 7(1&2) 2005: 162-163
Analysis of transient otoacoustic emissions and brainstem evoked auditory potentials in neonates with hyperbilirubinemia
Silva, Daniela Polo Camargo da;Martins, Regina Helena Garcia;
Brazilian Journal of Otorhinolaryngology , 2009, DOI: 10.1590/S1808-86942009000300013
Abstract: hyperbilirubinemia is toxic to the auditory pathways and to the central nervous system, leaving sequelae such as hearing loss and encephalopathy. aim: to assess the hearing of neonates with hyperbilirubinemia, using transient evoked otoacoustic emissions (toaes) and brainstem evoked auditory potentials (beap). prospective study. materials and methods: we had two groups: gi (n-25), neonates with hyperbilirubinemia; gii (n-22), neonates without hyperbilirubinemia and without risk factors for hearing loss. all the neonates had up to 60 days of life and were submitted to toae and beap. results: 12 neonates from gi and 10 from gii were girls and 13 from gi and 12 from gii were boys. toaes were present in all the children, however with lower amplitudes in gi, especially in the frequencies of 2 and 3khz (p < 0.05). regarding the beap, we observed a mild pv and li-v increase in bi. the alterations observed in these tests do not correlate to the serum levels of bilirubin. conclusions: in neonates with hyperbilirubinemia, we noticed lower toae amplitudes and mild pv and li-v increase, indicating cochlear and retrocochlear disorders, stressing the importance of using both tests and carefully reading them in these evaluations.
Effects of changes in dynamic characteristics of the middle ear on transient-evoked otoacoustic emissions  [PDF]
?piri? Sanja,?piri? Predrag,Vranje? Dalibor,Aleksi? Aleksandra
Medicinski Pregled , 2011, DOI: 10.2298/mpns1110439s
Abstract: Transient-evoked otoacoustic emissions are transmitted through the middle ear. The purpose of this study was to investigate the effects of dynamic properties of the transmission system on the measurability of transient otoacoustic emissions. The authors analyzed the presence of transient otoacoustic emissions in 48 children with serous otitis media regarding the tympanogram, presence and type of effusion and pure tone average findings. The results obtained in this research show the predominant absence of transient otoacoustic emissions in patients with type B tympanogram (69.1%) especially if the effusion is mucoid (77.5%) with the hearing loss of 15 decibel hearing level. This research shows that disorders in dynamic characteristics of the middle ear in patients with serous otitis obstruct the transmission of acoustic energy and affect the measurability of transient otoacoustic emissions, especially if the effusion is mucoid and hearing loss of 15 decibel hearing level.
The Effect of Acoustic Reflex on Contralateral Suppression of Transient-Evoked Otoacoustic Emissions
Farzaneh Zamiri Abdollahi,Abdolreza Sheibanizadeh,Jalal Sameni
Audiology , 2012,
Abstract: Background and Aim: Contralateral suppression of transient evoked otoacoustic emissions (TEOAEs) test evaluates the efferent auditory system. In this test, acoustic reflex is an important confounding variable. In recent years, application of this test is growing especially in children suspect to central auditory processing disorder. Therefore, the magnitude of influence of this confounding variable on the suppression of TEOAEs should be made clear. The aim of this study was to investigate the impact of acoustic reflex on contralateral suppression of TEOAEs.Methods: This research was performed on 39 normal-hearing adults of both sexes and of 18-26 years of age. Tests were used for the determination of interaural attenuation (IA), acoustic reflex, TEOAEs and contralateral suppression of TEOAEs.Results: TEOAEs amplitudes and their contralateral suppression were significantly higher in females and males respectively (p=0.01). The amount of TEOAEs suppression before reflex activity ranged between 2000 to 3000 Hz. Activation of acoustic reflex significantly increased the magnitude of suppression in all frequency bands (p≤0.01) and maximum suppression occurred in 500 to 1000 Hz.Conclusion: For achieving accuracy of clinical findings, clinicians should always use suppressant levels lower than the acoustic reflex threshold. It is recommended that different norms for males and females be used in contralateral suppression of TEOAEs.
Transiently Evoked Otoacoustic Emissions in Children with Otitis Media with Effusion  [PDF]
Dimitris G. Balatsouras,George Koukoutsis,Panayotis Ganelis,George S. Korres,Andreas Aspris,Antonis Kaberos
International Journal of Otolaryngology , 2012, DOI: 10.1155/2012/269203
Abstract: Introduction. Otitis media with effusion is a common pediatric disease whose diagnosis is based on pneumatic otoscopy, pure-tone audiometry, and tympanometry. The aim of this study was to evaluate transiently evoked otoacoustic emissions in the diagnosis of otitis media with effusion as compared to tympanometry. Patients and Methods. 38 children with bilateral otitis media with effusion were studied. 40 normal children of similar age and sex were used as controls. All subjects underwent pneumatic otoscopy, standard pure-tone audiometry, tympanometry, and transiently evoked otoacoustic emissions. Results. In the group of children with bilateral otitis media, transiently evoked otoacoustic emissions were absent in 51 ears (67%). In the remaining 25 ears (33%) the mean emission amplitude was reduced, as compared to the mean value of the control group. Conclusions. Transiently evoked otoacoustic emissions should be included in the diagnostic workup of otitis media with effusion because it is a fast, reliable, and objective test. Transiently evoked otoacoustic emissions should always be used in conjunction with tympanometry, because a more meaningful interpretation of transiently evoked otoacoustic emissions measures is possible. 1. Introduction Otitis media with effusion is a common pediatric disease and is considered the most common cause of hearing impairment among children [1]. Diagnosis is mainly based on pneumatic otoscopy, pure-tone audiometry, and tympanometry. Tympanometry is an objective technique that can detect abnormal middle-ear function consistent with the presence of fluid in the middle-ear cavity [2]. Transiently evoked otoacoustic emissions (TEOAEs) are a diagnostic method widely used during the past decade to study cochlear function, in a noninvasive and objective manner. Usually, TEOAEs are present in people who have normal cochlear function and a healthy middle ear [3]. Although extensive experience from the use of TEOAEs in widespread neonatal hearing screening has been gained [4], little data has been gathered from the population of preschool and school-aged children. Because otoacoustic emissions are transmitted from the cochlea to the external ear canal via the middle ear, the transmission properties of the middle ear directly influence their characteristics. In general, middle-ear effusion reduces measured emission amplitudes and sometimes eliminates the response entirely [5]. The aim of this study was to evaluate TEOAEs in the diagnosis of otitis media with effusion in comparison with tympanometry. 2. Material and Methods A group
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