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1.
Acta Pharmaceutica Sinica B ; (6): 1305-1321, 2022.
Article in English | WPRIM | ID: wpr-929349

ABSTRACT

Cisplatin-related ototoxicity is a critical side effect of chemotherapy and can lead to irreversible hearing loss. This study aimed to assess the potential effect of the DNA methyltransferase (DNMT) inhibitor RG108 on cisplatin-induced ototoxicity. Immunohistochemistry, apoptosis assay, and auditory brainstem response (ABR) were employed to determine the impacts of RG108 on cisplatin-induced injury in murine hair cells (HCs) and spiral ganglion neurons (SGNs). Rhodamine 123 and TMRM were utilized for mitochondrial membrane potential (MMP) assessment. Reactive oxygen species (ROS) amounts were evaluated by Cellrox green and Mitosox-red probes. Mitochondrial respiratory function evaluation was performed by determining oxygen consumption rates (OCRs). The results showed that RG108 can markedly reduce cisplatin induced damage in HCs and SGNs, and alleviate apoptotic rate by protecting mitochondrial function through preventing ROS accumulation. Furthermore, RG108 upregulated BCL-2 and downregulated APAF1, BAX, and BAD in HEI-OC1 cells, and triggered the PI3K/AKT pathway. Decreased expression of low-density lipoprotein receptor-related protein 1 (LRP1) and high methylation of the LRP1 promoter were observed after cisplatin treatment. RG108 treatment can increase LRP1 expression and decrease LRP1 promoter methylation. In conclusion, RG108 might represent a new potential agent for preventing hearing loss induced by cisplatin via activating the LRP1-PI3K/AKT pathway.

2.
Braz. j. med. biol. res ; 54(11): e11503, 2021. graf
Article in English | LILACS | ID: biblio-1285661

ABSTRACT

The mixture of ketamine and xylazine is widely used for the auditory brainstem response (ABR) measurement. Esketamine is twice as potent as ketamine. Our objective was to assess the influence of esketamine in mice undergoing cochlear function measurement including ABR and distortion product otoacoustic emission (DPOAE) measurement. C57Bl/6J mice were treated with an equivalent dose of analgesia and received either a single intraperitoneal (ip) injection of 100 mg/kg ketamine and 25 mg/kg xylazine or 50 mg/kg esketamine and 25 mg/kg xylazine. Hearing thresholds, peak latencies of waves I and V, and DPOAE thresholds were recorded. Time to loss of righting and time to regain righting were also assessed. We found that hearing thresholds, the peak latencies of waves I and V, and DPOAE thresholds were similar between the two groups (all P>0.05). Time to regain righting was significantly shorter in the esketamine group (P<0.001) than in the ketamine group. We concluded that when using equivalent doses of analgesia, esketamine may be an ideal substitute for ketamine during cochlear function test.


Subject(s)
Animals , Rabbits , Ketamine , Xylazine , Evoked Potentials, Auditory, Brain Stem , Otoacoustic Emissions, Spontaneous
3.
Int. arch. otorhinolaryngol. (Impr.) ; 23(3): 267-275, July-Sept. 2019. tab, graf
Article in English | LILACS | ID: biblio-1040018

ABSTRACT

Abstract Introduction Riluzole (2-amino-6-trifluoromethoxy benzothiazole) is known as a neuroprotective, antioxidant, antiapoptotic agent. It may have beneficial effects on neuronal cell death due to cisplatin-induced ototoxicity. Objective To evaluate the effect of riluzole on cisplatin-induced ototoxicity in guinea pigs. Methods Twenty-four guinea pigs, studied in three groups, underwent auditory brainstem response evaluation using click and 8 kHz tone burst stimuli. Subsequently, 5 mg/kg of cisplatin were administered to all animals for 3 days intraperitoneally (i.p.) to induce ototoxicity. Half an hour prior to cisplatin, groups 1, 2 and 3 received 2 ml of saline i.p., 6 mg/kg of riluzole hydrochloride i.p., and 8 mg/kg of riluzole hydrochloride i.p., respectively, for 3 days. The auditory brainstem responses were repeated 24 hours after the last drug administration. The cochleae were analyzed by transmission electron microscopy (TEM). Results After drug administiration, for 8,000 Hz stimulus, group 1 had significantly higher threshold shifts when compared with groups 2 (p < 0.05) and 3 (p < 0.05), and there was no significant difference in threshold shifts between groups 2 and 3 (p > 0.05). Transmission electron microscopy findings demonstrated the protective effect of riluzole on the hair cells and the stria vascularis, especially in the group treated with 8 mg/kg of riluzole hydrochloride. Conclusion We can say that riluzolemay have a protective effect on cisplatin- induced ototoxicity. However, additional studies are needed to confirm these results and the mechanisms of action of riluzole.


Subject(s)
Animals , Male , Evoked Potentials, Auditory, Brain Stem/drug effects , Cisplatin/adverse effects , Riluzole/pharmacology , Hearing Loss, Sensorineural/chemically induced , Auditory Threshold/drug effects , Stria Vascularis/drug effects , Stria Vascularis/pathology , Cochlear Nerve/drug effects , Cochlear Nerve/pathology , Riluzole/therapeutic use , Models, Animal , Microscopy, Electron, Transmission , Guinea Pigs , Hair Cells, Auditory/drug effects , Hair Cells, Auditory/pathology , Nerve Degeneration/chemically induced
4.
Braz. j. otorhinolaryngol. (Impr.) ; 85(1): 32-36, Jan.-Feb. 2019. tab, graf
Article in English | LILACS | ID: biblio-984061

ABSTRACT

Abstract Introduction: The use of diagnostic auditory brainstem response testing under sedation is currently the "gold standard" in infants and young children who are not developmentally capable of completing the test. Objective: The aim of the study is to compare a propofol-ketamine regimen to an oral chloral hydrate regimen for sedating children undergoing auditory brainstem response testing. Methods: Patients between 4 months and 6 years who required sedation for auditory brainstem response testing were included in this retrospective study. Drugs doses, adverse effects, sedation times, and the effectiveness of the sedative regimens were reviewed. Results: 73 patients underwent oral chloral hydrate sedation, while 117 received propofol-ketamine sedation. 12% of the patients in the chloral hydrate group failed to achieve desired sedation level. The average procedure, recovery and total nursing times were significantly lower in the propofol-ketamine group. Propofol-ketamine group experienced higher incidence of transient hypoxemia. Conclusion: Both sedation regimens can be successfully used for sedating children undergoing auditory brainstem response testing. While deep sedation using propofol-ketamine regimen offers more efficiency than moderate sedation using chloral hydrate, it does carry a higher incidence of transient hypoxemia, which warrants the use of a highly skilled team trained in pediatric cardio-respiratory monitoring and airway management.


Resumo Introdução: O uso de testes diagnósticos de potencial evocado auditivo de tronco encefálico sob sedação é atualmente o padrão-ouro em lactentes e crianças pequenas que não têm desenvolvimento suficiente para realizar o exame. Objetivo: O objetivo do estudo foi comparar a sedação de crianças submetidas a testes de potencial evocado auditivo de tronco encefálico com propofol-quetamina e com hidrato de cloral por via oral. Método: Pacientes entre 4 meses e 6 anos de idade que necessitaram de sedação para a realização do potencial evocado auditivo de tronco encefálico foram incluídos nesse estudo retrospectivo. Foram revisadas as doses dos medicamentos, os efeitos adversos, os tempos de sedação e a eficácia das formas de sedação. Resultados: 73 pacientes foram submetidos à sedação oral com hidrato de cloral, enquanto 117 receberam sedação com propofol-quetamina; 12% dos pacientes do grupo hidrato de cloral não alcançaram o nível desejado de sedação. Os tempos médios de procedimento, recuperação e o tempo total de cuidados de enfermagem foram significativamente menores no grupo propofol-quetamina, entretanto este grupo experimentou maior incidência de hipoxemia transitória. Conclusão: Ambos os regimes de sedação podem ser utilizados com sucesso para sedar crianças para realização do exame de potencial evocado de tronco encefálico. Embora a sedação profunda com propofol e quetamina ofereça mais eficiência do que a sedação moderada com hidrato de cloral, ela apresenta maior incidência de hipoxemia transitória, o que requer uma equipe altamente qualificada, treinada em monitoramento cardiorrespiratório pediátrico e manejo de vias aéreas.


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Audiometry, Evoked Response/methods , Chloral Hydrate , Conscious Sedation/methods , Deep Sedation/methods , Hypnotics and Sedatives , Ketamine , Time Factors , Propofol , Reproducibility of Results , Retrospective Studies , Evoked Potentials, Auditory, Brain Stem/physiology , Treatment Outcome , Statistics, Nonparametric , Drug Combinations , Hearing Loss/diagnosis
5.
Article in English | WPRIM | ID: wpr-739230

ABSTRACT

OBJECTIVES: The energy consumption process of cochlea and neural signal transduction along the auditory pathway are highly dependent on blood oxygen supply. At present, it is under debate on whether the obstructive sleep apnea syndrome (OSAS) would affect the auditory function since the patients suffer from low oxygen saturation. Moreover, it is difficult to detect the functional state of auditory in less severe stage of OSAS. Recently, speech-evoked auditory brainstem response (speech-ABR) has been reported to be a new electrophysiological tool in characterizing the auditory dysfunction. The aim of the present study is to evaluate the auditory processes in adult patients with mild and moderate OSAS by speech-ABR. METHODS: An experimental group of 31 patients with mild to moderate OSAS, and a control group without OSAS diagnosed by apnea hypopnea index in polysomnogram were recruited. All participants underwent otologic examinations and tests of pure-tone audiogram, distortion product otoacoustic emissions, click-evoked auditory brainstem response (click-ABR) and speech-ABR, respectively. RESULTS: The results of pure-tone audiogram, distortion product otoacoustic emissions, and click-ABR in OSAS group showed no significant differences compared with the control group (P>0.05). Speech-ABRs for OSAS participants and controls showed similar morphological waveforms and typical peak structures. There were significant group differences for the onset and offset transient peaks (P < 0.05), where OSAS group had longer latencies for peak V (6.69± 0.33 ms vs. 6.39±0.23 ms), peak C (13.48±0.30 ms vs. 13.31±0.23 ms), and peak O (48.27±0.39 ms vs. 47.60± 0.40 ms) compared to the control group. The latency of these peaks showed significant correlations with apnea hypopnea index for peak V (r=0.37, P=0.040), peak C (r=0.36, P=0.045), as well as peak O (r=0.55, P=0.001). CONCLUSION: These findings indicate that some auditory dysfunctions may be present in patients with mild and moderate OSAS, and the damages were aggravated with the severity of OSAS, which suggests that speech-ABR may be a potential biomarker in the diagnosis and evaluation at early stage of OSAS.


Subject(s)
Adult , Hypoxia , Apnea , Auditory Pathways , Cochlea , Diagnosis , Evoked Potentials, Auditory, Brain Stem , Humans , Oxygen , Polysomnography , Signal Transduction , Sleep Apnea, Obstructive
6.
Article in Chinese | WPRIM | ID: wpr-805649

ABSTRACT

Objective@#To investigate residual hearing of children severe and profound sensorineural deafness in whom wave V was not found in auditory brainstem response(ABR) testing, and to emphasize the importance of objective audiological tests.@*Methods@#Two hundred and fifty-two children who were admitted to the Second Affiliated Hospital of Zhengzhou University between January 2015 and April 2018, with an average age of 20 months from 72 days to 4 years, received a full battery of objective audiological tests consisting of distortion product otoacoustic emission(DPOAEs), tympanometry, auditory brainstem responses(ABRs), 40 Hz auditory event related potential(40 HzAERP) and auditory steady-state response(ASSRs).There were 159 males(318 ears) and 93 females(186 ears). Residual hearing obtained by 40 HzAERP、ASSR of 252 children with sensorineural deafness was studied in relation to the absence of wave V in click ABR. SPSS 16.0 software was used to analyze the data.@*Results@#Four hundred and forty-four ears of 504 ears have residual hearing of different degrees at different frequencies(88.1%),60 ears (11.9%) were found in whom responses was not found in 40 HzAERP、ASSR testing; Seventy-two ears(14.3%) in 38 patients were tested cochlear microphonic potentials (CMs).@*Conclusion@#In children hearing evaluations,a full battery of objective audiological tests could better investigate residual hearing; The CMs were tested could provide the Audiotery Neuropathy diagnosis in infants with OAEs and ABR absent.

7.
Article in Chinese | WPRIM | ID: wpr-799909

ABSTRACT

Objective@#To explore the characteristics of auditory steady state evoked responses (ASSR) and auditory brainstem response (ABR) in noise-induced hearing loss population and the relationship between the response threshold of corresponding frequency and pure tone audiometry (PTA) .@*Methods@#Noise-induced hearing loss patients who completed subjective and objective audiometry in our hospital from October 2014 to October 2018 were collected. The results of PTA, ABR, ASSR and the correlation between subjective and objective audiometry were discussed.@*Results@#A total of 381 ears of 193 patients were enrolled. The difference of 0.5, 1.0, 2.0 and 4.0 kHz between ASSR threshold and PTA was 5.9, 6.9, 11.8 and 1.8 dB, respectively. The correlation coefficients were 0.638, 0.680, 0.657 and 0.608. The difference of 1.0, 2.0, 3.0 and 4.0 kHz between ABR threshold and PTA was 44.2, 35.0, 19.0 and 2.0 dB. With the increase of frequency, the threshold difference between ABRt V wave and PTA decreased gradually.@*Conclusion@#ASSR and ABR response thresholds are valuable in subjective assessment on noise-induced hearing loss. The thresholds of ASSR and ABR at 4 kHz are close to those of PTA.

8.
Braz. j. otorhinolaryngol. (Impr.) ; 84(1): 51-57, Jan.-Feb. 2018. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-889354

ABSTRACT

Abstract Introduction Obstructive sleep apnea causes changes in normal sleep architecture, fragmenting it chronically with intermittent hypoxia, leading to serious health consequences in the long term. It is believed that the occurrence of respiratory events during sleep, such as apnea and hypopnea, can impair the transmission of nerve impulses along the auditory pathway that are highly dependent on the supply of oxygen. However, this association is not well established in the literature. Objective To compare the evaluation of peripheral auditory pathway and brainstem among individuals with and without obstructive sleep apnea. Methods The sample consisted of 38 adult males, mean age of 35.8 (±7.2), divided into four groups matched for age and Body Mass Index. The groups were classified based on polysomnography in: control (n = 10), mild obstructive sleep apnea (n = 11) moderate obstructive sleep apnea (n = 8) and severe obstructive sleep apnea (n = 9). All study subjects denied a history of risk for hearing loss and underwent audiometry, tympanometry, acoustic reflex and Brainstem Auditory Evoked Response. Statistical analyses were performed using three-factor ANOVA, 2-factor ANOVA, chi-square test, and Fisher's exact test. The significance level for all tests was 5%. Results There was no difference between the groups for hearing thresholds, tympanometry and evaluated Brainstem Auditory Evoked Response parameters. An association was observed between the presence of obstructive sleep apnea and changes in absolute latency of wave V (p = 0.03). There was an association between moderate obstructive sleep apnea and change of the latency of wave V (p = 0.01). Conclusion The presence of obstructive sleep apnea is associated with changes in nerve conduction of acoustic stimuli in the auditory pathway in the brainstem. The increase in obstructive sleep apnea severity does not promote worsening of responses assessed by audiometry, tympanometry and Brainstem Auditory Evoked Response.


Resumo Introdução A Apneia Obstrutiva do Sono provoca modificações na arquitetura normal do sono, fragmentando-o de forma crônica com hipóxias intermitentes levando, a longo prazo, a sérias consequências na saúde. Acredita-se que a ocorrência de eventos respiratórios durante o sono como apneia e hipopneia pode prejudicar a transmissão de impulsos nervosos ao longo da via auditiva que são altamente dependentes do fornecimento do oxigênio. Contudo, essa associação não se encontra bem estabelecida na literatura. Objetivo Comparar os achados da avaliação da via auditiva periférica e no tronco encefálico entre indivíduos portadores e não portadores de apneia obstrutiva do sono. Método A casuística foi composta por 38 adultos do sexo masculino, média de idade de 35,8 (±7,2); divididos em quatro grupos experimentais pareados por idade e índice da massa corpórea. Os grupos foram classificados com base na polissonografia em: controle (n = 10), apneia obstrutiva do sono leve (n = 11), apneia obstrutiva do sono moderada (n = 8) e apneia obstrutiva do sono grave (n = 9). Todos os sujeitos do estudo negaram história pregressa de risco para perda auditiva e foram submetidos à audiometria, timpanometria, pesquisa dos reflexos acústicos e Potenciais Evocados Auditivos de Tronco Encefálico. As análises estatísticas foram realizadas por meio de ANOVA 3-fatores, ANOVA 2-fatores, teste de Qui-quadrado e teste exato de Fisher. O nível de significância adotado para todos os testes foi de 5%. Resultados Não houve diferença entre os grupos para os limiares auditivos, timpanometria e parâmetros avaliados do Peate. Observou-se associação entre a presença da apneia obstrutiva do sono e alteração da latência absoluta da onda V (p = 0,03). Observou-se associação entre apneia obstrutiva do sono de grau moderado e alteração da latência da onda V (p = 0,01). Conclusão A presença de apneia obstrutiva do sono está associada à presença de alteração na condução nervosa do estímulo acústico na via auditiva em tronco encefálico. O aumento do grau de severidade da apneia obstrutiva do sono não promove piora das respostas avaliadas pela audiometria, timpanometria e Potenciais Evocados Auditivos de Tronco Encefálico.

9.
Audiol., Commun. res ; 23: e1965, 2018. tab
Article in Portuguese | LILACS | ID: biblio-983896

ABSTRACT

RESUMO Objetivo Verificar a ocorrência de alterações auditivas periféricas e centrais em lactentes expostos à transmissão vertical do HIV. Métodos Análise retrospectiva de 144 prontuários de lactentes que passaram por avaliação auditiva ao nascimento, entre janeiro de 2010 e dezembro de 2015, com pesquisa das emissões otoacústicas evocadas por estímulo transiente e do potencial evocado auditivo de tronco encefálico. Os lactentes foram distribuídos em dois grupos: grupo estudo (GE), composto por 72 lactentes com mães soropositivas para o HIV e grupo controle (GC), com 72 lactentes sem risco para perda auditiva. O GE teve, ainda, os resultados do monitoramento auditivo aos 6 meses de idade analisados. Resultados Os grupos não se diferenciaram em relação à idade e ao gênero. Os resultados das emissões otoacústicas foram normais em ambos os grupos, revelando função coclear normal. Houve tendência do grupo estudo de apresentar maior ocorrência de alterações centrais no potencial evocado auditivo de tronco encefálico. A maioria dos lactentes não compareceu ao monitoramento auditivo e, entre os presentes, houve identificação de alteração audiológica. Conclusão Não houve alteração de função coclear na população estudada. Houve tendência de mais alterações centrais no grupo estudo, com predomínio das alterações de tronco baixo. Houve pouca adesão ao monitoramento auditivo e baixa concordância entre a primeira e a última avaliação.


ABSTRACT Purpose To verify the occurrence of peripheral and central auditory impairments in infants exposed to HIV vertical transmission. Methods Retrospective analysis of 144 medical charts of infants who underwent audiological evaluation at birth, between 2010 and 2015, through transient evoked otoacoustic emissions and auditory brainstem response. The infants were divided into two groups: Study Group: composed of 72 infants with HIV positive mothers; and Control Group: with 72 infants without risk factors for hearing loss. For the study group, the results of the audiological monitoring at six months of age were also analyzed. Results The groups did not differ in age and sex. Results of otoacoustic emissions were normal in both groups, thus having normal cochlear function. In the study group, there was a tendency to present a higher occurrence of abnormalities in the auditory brainstem response results. The majority of infants did not show up for audiological monitoring, and among those who showed up, it was possible to identify audiological impairments. Conclusion There was no cochlear function impairment in the study sample. There was a tendency towards central hearing impairments in the study group, with a predominance of lower brainstem impairment. There was a poor adherence to audiological monitoring and poor agreement between the first and last evaluation.


Subject(s)
Humans , Infant , Evoked Potentials, Auditory, Brain Stem , HIV , Infectious Disease Transmission, Vertical , Evoked Potentials, Auditory , Otoacoustic Emissions, Spontaneous
10.
Article in English | WPRIM | ID: wpr-740342

ABSTRACT

BACKGROUND AND OBJECTIVES: Sensorineural hearing loss (SNHL) in children is associated with neurocognitive morbidity. The cause of SNHL is a loss of hair cells in the organ of Corti. There are currently no reparative treatments for SNHL. Numerous studies suggest that cord blood mononuclear cells (human umbilical cord blood, hUCB) allow at least partial restoration of SNHL by enabling repair of a damaged organ of Corti. Our objective is to determine if hUCB is a safe treatment for moderate to severe acquired SNHL in children. SUBJECTS AND METHODS: Eleven children aged 6 months to 6 years with moderate to severe acquired SNHL were treated with intravenous autologous hUCB. The cell dose ranged from 8 to 30 million cells/kg body weight. Safety was assessed by measuring systemic hemodynamics during hUCB infusion. Infusion-related toxicity was evaluated by measuring neurologic, hepatic, renal and pulmonary function before and after infusion. Auditory function, auditory verbal language assessments and MRI with diffusion tensor imaging (DTI) were obtained before and after treatment. RESULTS: All patients survived, and there were no adverse events. No infusionrelated changes in hemodynamics occurred. No infusion-related toxicity was recorded. Five subjects experienced a reduction in auditory brainstem response (ABR) thresholds. Four of those 5 subjects also experienced an improvement in cochlear nerve latencies. Comparison of MRI with DTI sequences obtained before and after treatment revealed increased fractional anisotropy in the primary auditory cortex in three of five subjects with reduced ABR thresholds. Statistically significant (p < 0.05) reductions in ABR thresholds were identified. CONCLUSIONS: TIntravenous hUCB is feasible and safe in children with SNHL.


Subject(s)
Anisotropy , Auditory Cortex , Body Weight , Child , Cochlear Nerve , Diffusion Tensor Imaging , Evoked Potentials, Auditory, Brain Stem , Fetal Blood , Hair , Hearing Loss, Sensorineural , Hemodynamics , Humans , Magnetic Resonance Imaging , Mesenchymal Stem Cells , Organ of Corti , Umbilical Cord
11.
Article in English | WPRIM | ID: wpr-740334

ABSTRACT

BACKGROUND AND OBJECTIVES: Weak signals embedded in fluctuating masker can be perceived more efficiently than similar signals embedded in unmodulated masker. This release from masking is known as comodulation masking release (CMR). In this paper, we investigate, neural correlates of CMR in the human auditory brainstem. SUBJECTS AND METHODS: A total of 26 normal hearing subjects aged 18-30 years participated in this study. First, the impact of CMR was quantified by a behavioral experiment. After that, the brainstem correlates of CMR was investigated by the auditory brainstem response to complex sounds (cABR) in comodulated (CM) and unmodulated (UM) masking conditions. RESULTS: The auditory brainstem responses are less susceptible to degradation in response to the speech syllable /da/ in the CM noise masker in comparison with the UM noise masker. In the CM noise masker, frequency-following response (FFR) and fundamental frequency (F0) were correlated with better behavioral CMR. Furthermore, the subcortical response timing of subjects with higher CMR was less affected by the CM noise masker, having higher stimulus-to-noise response correlations over the FFR range. CONCLUSIONS: The results of the present study revealed a significant link between brainstem auditory processes and CMR. The findings of the present study show that cABR provides objective information about the neural correlates of CMR for speech stimulus.


Subject(s)
Adult , Brain Stem , Evoked Potentials, Auditory, Brain Stem , Hearing , Humans , Masks , Noise
12.
Article in English | WPRIM | ID: wpr-740327

ABSTRACT

Auditory brainstem responses (ABR) have been used as a powerful and the most common objective tool to evaluate hearing sensitivity and to diagnose the types of hearing loss and neurological disorders, through the auditory peripheral pathway to a central level of the brainstem, since 1971. Although bone-conduction (BC) ABR could be an alternative to air-conduction (AC) ABR, as the former overcomes some limitations of the latter, the majority of clinicians rarely utilize it due to a lack of knowledge and no routine test administration. This review presents the weaknesses of AC ABR that apply to all clinical population, and discusses the development of BC ABR. The optimal placements of bone oscillators to obtain favorable clinical outcomes in infants, children, and adults, and the appropriate stimuli for BC ABR are examined. While providing absolute thresholds and latencies of BC ABR based on previous studies compared to AC ABR, this review includes clinical data of infants and young children with both normal hearing in terms of maturation, and with pathology such as congenital external auditory canal atresia. We recommend the future clinical application of BC ABR for candidacy as well as for patients with BC hearing implants.


Subject(s)
Adult , Brain Stem , Child , Ear Canal , Evoked Potentials, Auditory, Brain Stem , Hearing , Hearing Loss , Humans , Infant , Nervous System Diseases , Pathology
13.
Article in Korean | WPRIM | ID: wpr-719895

ABSTRACT

OBJECTIVES: To review the status of newborn hearing screening (NHS) and to investigate the effect of the examiners on NHS tests to help the quality control of NHS at a general hospital in a city. METHODS: The charts of newborns from January 2015 to March 2016 and from August 2016 to October 2017 were retrospectively reviewed. We compared the results of tests performed by several examiners(group 1) with those performed by one audiologist (group 2) using the same automated auditory brainstem response test. RESULTS: The screening rate and referral rate were not significantly different between group 1 and group 2. The confirmatory test rate was higher in the group 2, but it was not significant. In group 1, the number of tests performed 3 or more times in one ear at one time was significantly higher. The number of tests performed in only one ear at one time was higher in group 2. The screening rate within one month after birth was 64.21%, referral rate was 7.32%, confirmatory test rate within 3 months after birth was 21.74%, and the prevalence of hearing loss was 1.46%. CONCLUSIONS: There was no significant difference of results depending on the examiners. In order to make proper screening test, it is necessary to periodically educate the examiner and to instruct the examiner by the supervisor doctors.


Subject(s)
Ear , Evoked Potentials, Auditory, Brain Stem , Hearing Loss , Hearing , Hospitals, General , Humans , Infant, Newborn , Mass Screening , Parturition , Prevalence , Quality Control , Referral and Consultation , Retrospective Studies
14.
Article in Chinese | WPRIM | ID: wpr-712969

ABSTRACT

[Objective] To explore the relationship between laterality of auditory brainstem response and speech comprehension in children with autism spectrum disorders preliminarily.[Method] Review hearing diagnosis data in clinical audiology center from September 2013 to August 2015.We compare auditory brainstem responses in children with autism spectrum disorders (ASD group) and with other disorders (control group),and we further divide children with autism spectrum disorders into two groups (high ability group and low ability group) in terms of their speech comprehension and compare their auditory brainstem responses.[Result] The latencies of waves Ⅲ and Ⅴ,and interpeak latencies Ⅰ to Ⅲ and Ⅰ to Ⅴ of the ASD were significantly prolonged than the control group.And the laterality of waves Ⅲ and Ⅴ,and interpeak latencies Ⅰ to Ⅲ and Ⅰ to Ⅴ present in the ASD group,but not in the control group.Meanwhile,the laterality of waves Ⅲ and Ⅴ,and interpeak latencies Ⅰ to Ⅲ and Ⅰ to Ⅴ present in the high ability group,but not in the low ability group.[Conclusion] Laterality was not a common phenomenon in auditory brainstem response,and it may be associated with the development of speech comprehension in children with autism spectrum disorders.

15.
Article in Korean | WPRIM | ID: wpr-761267

ABSTRACT

OBJECTIVES: Vestibular paroxysmia (VP) of the eighth cranial nerve is characterized by recurrent auditory and vestibular disturbances when a proximal part of the eighth cranial nerve is continuously pressed by a vessel. A detailed history and several ancillary diagnostic tools, such as tinnitogram, caloric test, auditory brainstem response (ABR) and magnetic resonance imaging, are used for diagnosis of VP. Among them, although Møller criteria using ABR is a simple method, the previous study is insufficient. Therefore, this study aimed to evaluate ABR's diagnostic value of VP. METHODS: ABR records of the 14 patients (patient group) who were diagnosed with VP and 45 patients (as control) who were diagnosed with only tinnitus were reviewed retrospectively. We analyzed the differences in Møller criteria between 2 groups. RESULTS: Mean age of the patient group was 52.9 years old and the control group was 55.4 years old. As compared with the control group, there were no significant differences of Møller 3 criteria contents (peak II wave amplitude < 33% [35.7% vs. 15.5%, p=0.133], interpeak latency I–III ≥2.3 msec [42.8% vs. 35.5%, p=0.622]), Contralateral interpeak latency III–V ≥2.2 msec (0% vs. 4.4%, p=1.000) in patient group. CONCLUSION: There was no significant difference of ABR parameters according to the Møller criteria between patient and control groups.


Subject(s)
Caloric Tests , Diagnosis , Evoked Potentials, Auditory, Brain Stem , Humans , Magnetic Resonance Imaging , Methods , Retrospective Studies , Tinnitus , Vestibulocochlear Nerve
16.
Article in Chinese | WPRIM | ID: wpr-698108

ABSTRACT

Objective To study the possible mechanism of hearing impairment after noise exposure .Methods Adult SD rats (n=14) were monaurally exposed to a loud noise (16 kHz ,one octave band pass (116 dB SPL)) for 1-hour ,or left as non-exposed controls (n=8) .The ABR was measured before and on the 7th day following unilateral noise exposure .All the Animals were euthanased at 7th day following acoustic trauma .We used Western blots to quantify protein levels of PV ,CR and CB in the inferior colliculus .Results The auditory thresholds in 8 , 12 ,16 ,20 ,24 ,and 32 kHz of all the ears exposed to noise showed a significant increase (P<0 .001) .Compared to the sham -exposed controls ,noise-exposed animals had significantly higher levels of PV and CR and lower levels of CB in both the ipsilateral and contralateral IC than controls (P<0 .05) .Respectively ,all the noise-exposed ani-mals had higher levels of PV and CR in the ipsilateral IC than ipsilateral side (P<0 .05) .Conclusion These studies display a significant threshold shift and changes on the expressions of PV ,CR and CB in IC following acoustic trau-ma ,which may be related to noise deafness ,tinnitus and other series of auditory dysfunction .

17.
Article in Chinese | WPRIM | ID: wpr-698104

ABSTRACT

Objective To understand the characteristics of the hearing loss in patients with small acoustic neuroma .Methods A retrospective analysis was used to analyze the results of pure tone audiometry (PTA) and au-ditory brainstem response (ABR) in 35 patients (35 ears) diagnosed with small acoustic neuroma .The types of au-diometric curves ,degrees and frequencies of hearing loss and latent periods of ABR were analyzed .Results Moder-ate deafness was the most common type in this study ,with a total of 13 ears (37 .14% ,13/35) .In addition ,8 ears were profound deafness (22 .86% ,8/35) ,7 ears of binaural severe deafness (20 .00% ,7/35) ,6 ears of mild deafness (17 .14% ,6/35) ,and 1 normal ear (2 .86% .1/35) ,respectively .The types of audiometric curves were mainly U -shaped and sloping .15 audiometric curves were U -shaped (42 .86% ,15/35) ,15 sloping (42 .86% ,15/35) ,3 flat (8 .57% ,3/35) ,and 1 tent-shaped (2 .86% .1/35% ) .The main frequencies of hearing loss were 1 kHz ,2 kHz ,4 kHz ,and 8 kHz .The mean thresholds had statistically significant differences (P<0 .05) compared with the other frequencies by S -N -K test .ABR was abnormal in 32 ears(91 .43% ,32/35) .20 of the ears'I - V waves were prolonged or the inter-aural latency difference of V wave was>0 .4 ms .Five ears failed to show any ABR wave , but their 4 kHz pure tone threshold was < 80 dB HL .25 (71 .43% ,25/35)ears'ABR results indicated a retroco-chlear nature of ear disease .Conclusion Moderate deafness is the most common type of hearing loss in small acous-tic neuroma patients ,but only 71 .43% of the patients'ABR indicate a retrocochlear disease ,so an analysis of PTA together with ABR will help to diagnose .

18.
Basic & Clinical Medicine ; (12): 978-982, 2018.
Article in Chinese | WPRIM | ID: wpr-694020

ABSTRACT

Objective To investigate the impact of degree of hearing loss on auditory brainstem response predictions of behavioral thresholds. Methods A total of 179 patients with different hearing loss degree ( a total of 311 ears) patients from January 2012 to January 2016 in the affiliated hospital of Yan’an university were treated with auditory brainstem response (ABR), performed threshold behavior test, analyed the auditory brainstem electric response and behavioral threshold correlation, the factors that affect the ABR thresholds and behavioral threshold value and threshold of ABR and correction factor as well as linear regression equation for different frequency stimulation. Results ABR threshold was positively related to threshold behavior for the different frequencies stimulation, ABR threshold may predicte threshold behavior( P<0.05) ; ABR threshold value can predicte behavioral threshold differ-ence error and the degree of hearing loss( P<0.05) , through the relevant correction factors can reduce the predic-tion error. Conclusions Auditory brainstem responses may effectively predicte the hearing loss in children with be-havioural thresholds, differences in degree of hearing loss influence auditory brainstem response and behavioral threshold value, constant correction coefficient is conducive to auditory brainstem electric response and facilitates accuracy of the behavior threshold.

19.
Chongqing Medicine ; (36): 1440-1443,1448, 2018.
Article in Chinese | WPRIM | ID: wpr-691967

ABSTRACT

Objective To study the effect and mechanism of endoplamic reticulum stress on the auditory cortex injury after focal cerebral ischemia-reperfusion injury in rats.Methods 30 healthy male adult SD rats were chosen and randomly divided into 2 groups,ischemia-reperfusion(I/R) group and sham operated control,with each group 15 rats.The rats in I/R group were operated for suture-occluded method to establish middle cerebral artery occlusionmodel(MCAO),with ischemia for 60 mins followed by reperfusion for 24 h.And the control group was only to be isolated cervical vessels,with no thread embolism inserted.The auditory brainstem response (ABR) was tested before operation and at 24 h post-operation respectively.The neurological deficits,ratio of infarct volume were evaluated.The pathological changes were observed by HE.Neurocyte apoptosis were observed by Tunel,and the AI were determined.The expression of GRP78,Caspase-12 were detected by immunohistochemistry and Western blotting.Results Compared with the sham group,the neurological function scores,the infarct volume of brain of I/R group increased significantly.The threshold of ABR elevated significantly and AI rised in I/R group.HE staining showed that the neurons in the sham group were arranged in order,the shape was normal,but in the I/R group the normal structure disappeared,the nuclei were condensed.The expression of GRP78,Caspase-12 protein were significantly up-regulated.All of the differences above have statistical significance(P<0.05).Conclusion The mechanism of hearing loss after focal cerebral ischemia-reperfusion injury in rats is perhaps related to endoplamic reticulum stress,and GRP78,Caspase-12 participate in the process of neuron apoptosis on auditory cortex caused by ERS.

20.
Braz. j. otorhinolaryngol. (Impr.) ; 83(3): 324-329, May-June 2017. tab
Article in English | LILACS | ID: biblio-889269

ABSTRACT

Abstract Introduction: Cervical vestibular evoked myogenic potentials (cVEMP) can assess the integrity of the inferior vestibular nerve thereby promising to be a useful tool in the audiological test battery to diagnose vestibular schwannoma. Objective: To ascertain the utility of cVEMP in diagnosis of vestibular schwannoma in conjunction with the ABR and to evaluate whether the size of lesion has any effect on the cVEMP measures. Methods: Case-files of 15 known cases of vestibular schwannoma whose pure tone audiometry, auditory brainstem response (ABR), cVEMP and radiological investigation findings were available, were included in the study. Patients were categorised as large or small tumours based on the size. The absolute and inter-peak latencies of ABR, amplitudes of waves V and I, and inter-aural latency difference of wave V of ABR; and latency of P1 and N1 of cVEMP and amplitude of P1-N1 complex were considered in the study. Results: There were eight large and nine small tumours. All the patients with large tumours showed significant severity of hearing loss whereas only three out of nine patients with small tumours showed severe to profound deafness in the affected ear. The rest showed hearing status ranging from normal hearing sensitivity to moderate hearing loss. Most of the patients with large tumours showed complete absence of ABR in the affected ears with no identifiable wave-peaks. ABR in small tumours exhibited delayed III-I and delayed V-I interpeak latency interval (IPL). Four out of five patients with large unilateral tumours revealed contralateral effects of reduced amplitude or absence of cVEMP. On the contrary, six out of eight unilateral small tumours showed a normal cVEMP response in the contralateral ear. Both the patients with NF2 in the present study demonstrated cVEMP abnormalities. Conclusion: ABR and cVEMP, when used in combination, can be of immense use in identification of neuro-otologic conditions such as vestibular schwannoma and bilateral tumours in NF2. In the evaluation of unilateral vestibular schwannoma, abnormal contralateral findings of cVEMP and ABR are strongly indicative of the tumour size >2.5 cm. In unilateral severe to profound loss wherein ABR in poorer ear cannot give information of site-of-lesion, cVEMP can help in the differentiation.


Resumo Introdução: Os potenciais evocados miogênicos vestibulares cervicais (cVEMP) podem avaliar a integridade do nervo vestibular inferior, prometem assim ser uma ferramenta útil na bateria de testes audiológicos para o diagnóstico de schwannoma vestibular. Objetivo: Determinar a utilidade de cVEMP no diagnóstico de schwannoma vestibular em conjunto com PEATE e avaliar se o tamanho da lesão tem qualquer efeito sobre as medidas do cVEMP. Método: Quinze casos diagnosticados com schwannoma vestibular cujos exames de audiometria tonal pura, potencial evocado auditivo de tronco encefálico (PEATE), cVEMP e investigação radiológica estavam disponíveis foram incluídos no estudo. Os pacientes foram classificados como portadores de tumores grandes ou pequenos. As latências absolutas e interpico de PEATE as amplitudes das ondas V e I e a diferença de latência interaural da onda V da PEATE e a latência de P1 e N1 de cVEMP e amplitude do complexo P1-N1 foram consideradas no estudo. Resultados: Havia oito tumores grandes e nove pequenos. Todos os pacientes com tumores grandes apresentavam perda auditiva grave enquanto apenas três dos nove pacientes com pequenos tumores apresentaram surdez grave a profunda na orelha acometida. O restante apresentou audição que variou de normal a perda auditiva moderada. A maioria dos pacientes com tumores grandes demonstrou ausência completa de PEATE nas orelhas acometidas sem picos de onda identificáveis. O PEATE em tumores pequenos apresentou intervalo de latência interpico (ILI) tardia III-I e tardia V-I. Quatro em cada cinco pacientes com tumores grandes unilaterais revelaram efeitos contralaterais de amplitude reduzida ou ausência de cVEMP. Ao contrário, seis dos oito tumores pequenos unilaterais apresentaram resposta de cVEMP normal na orelha contralateral. Ambos os pacientes com NF2 no presente estudo demonstraram anormalidades na cVEMP. Conclusão: PEATE e cVEMP, quando usadas em combinação, podem ser úteis na identificação de condições neuro-otológicas como schwannoma vestibular e tumores bilaterais em NF2. Na avaliação de schwannoma vestibular unilateral, achados contralaterais anormais de cVEMP e PEATE são fortemente indicativos de tumor >2,5 cm. Na perda unilateral grave a profunda, na qual o PEATE na orelha mais prejudicada não fornece informações do local da lesão, cVEMP pode ajudar na diferenciação.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Young Adult , Neuroma, Acoustic/diagnosis , Evoked Potentials, Auditory, Brain Stem , Vestibular Evoked Myogenic Potentials , Reaction Time , Audiometry, Pure-Tone , Neuroma, Acoustic/pathology , Tumor Burden
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