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Abstract Introduction Auditory-evoked potentials are influenced by several factors, including polarity, filter, stimulus intensity and stimulation rate. The presentation of higher rates of stimuli per second enables the collection of a greater number of responses in a given period of time, promoting a shorter testing time; however, the collected recordings are subject to changes related to wave morphology. Objectives To compare the brainstem auditory-evoked-potential responses with click stimulus with the most commonly used stimulation rates in the clinical practice. Methods The present cross-sectional analytical study was performed with fifteen participants of both genders and normal hearing thresholds. The brainstem auditoryevoked potential was performed at four different stimulation rates (21.1, 26.7, and 27.7 stimuli/s, and a rate determined based on a mathematical calculation using the a measurement of the transmission frequency of the power grid at the time of the examination). Results We observed that the rate of 21.1 stimuli/s showed the highest amplitudes for waves I, III, and V when compared with the other rates. The rate of 26.7 stimuli/s, when compared with 27.7 stimuli/s, showed a higher amplitude for wave V. The latency if wave V was significantly lower with the rate of 21.1 stimuli/s than with 27.7 stimuli/s. Conclusions The stimulation rate interferes with wave latencies and amplitudes; its decrease from 27.7 to 21.1 stimuli/s decreases the latency of wave V and increases the amplitues and improves the morphology of waves I, III and V. In addition, we found evidence that suggests an improvement in the visualization of wave III by adjusting the stimulation rate based on a measurement of the local transmission frequency of the power grid.
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Introduction Auditory-evoked potentials are influenced by several factors, including polarity, filter, stimulus intensity and stimulation rate. The presentation of higher rates of stimuli per second enables the collection of a greater number of responses in a given period of time, promoting a shorter testing time; however, the collected recordings are subject to changes related to wave morphology. Objectives To compare the brainstem auditory-evoked-potential responses with click stimulus with the most commonly used stimulation rates in the clinical practice. Methods The present cross-sectional analytical study was performed with fifteen participants of both genders and normal hearing thresholds. The brainstem auditory-evoked potential was performed at four different stimulation rates (21.1, 26.7, and 27.7 stimuli/s, and a rate determined based on a mathematical calculation using the a measurement of the transmission frequency of the power grid at the time of the examination). Results We observed that the rate of 21.1 stimuli/s showed the highest amplitudes for waves I, III, and V when compared with the other rates. The rate of 26.7 stimuli/s, when compared with 27.7 stimuli/s, showed a higher amplitude for wave V. The latency if wave V was significantly lower with the rate of 21.1 stimuli/s than with 27.7 stimuli/s. Conclusions The stimulation rate interferes with wave latencies and amplitudes; its decrease from 27.7 to 21.1 stimuli/s decreases the latency of wave V and increases the amplitues and improves the morphology of waves I, III and V. In addition, we found evidence that suggests an improvement in the visualization of wave III by adjusting the stimulation rate based on a measurement of the local transmission frequency of the power grid.
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Introduction The use of hydroxychloroquine and chloroquine is formally indicated in cases of chronic autoimmune diseases. However, the use of these medications has already been associated with possible transitory or definitive alterations in hearing function and/or vestibular function in humans, when administrated in the short and long terms. Objective To describe, through a literature analysis, the functional vestibular and/or hearing alterations, caused by the use of hydroxychloroquine and chloroquine in youths and adults. Data Synthesis In total, 2,481 studies were identified in the initial search: out of these 32 were selected for a full-text reading, and 9 were selected after the exclusion of those which did not meet the eligibility criteria. Of these, four articles pointed to the presence of vestibular and auditory-associated alterations, three indicated only auditory pathologies, and two, vestibular disorders. Regarding the auditory alterations, tinnitus was the most frequent symptom, and bilateral sensorineural hearing loss was described in most studies, varying in degree from mild to severe. As for the vestibular alterations, vertigo was the most reported symptom. Conclusion Knowledge of the auditory and vestibular effects after the use of these substances can help in the decision regarding the best treatment, enabling the consideration of other available therapies for patients at risk of suffering those alterations, reducing the risk of auditory and vestibular disorders.
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RESUMO Objetivo O aparelho de amplificação sonora individual propicia benefícios para indivíduos com deficiência auditiva. No entanto, ainda são observados baixos níveis de adesão ao tratamento, devido às dificuldades no processo de adaptação. Neste sentido, destaca-se o uso de sites ou aplicativos com os objetivos de auxiliar no processo de orientação aos usuários e de avaliar a satisfação de usuários de aparelho de amplificação sonora individual, após a utilização de um site responsivo desenvolvido para auxiliar no processo de adaptação. Métodos Estudo quantitativo analítico experimental, ensaio clínico não randomizado, com 20 participantes, divididos em dois grupos. O grupo estudo fez uso do site responsivo como ferramenta de auxílio na adaptação, além de receber as orientações em seu formato tradicional. O grupo controle foi orientado somente pelo formato tradicional já existente no serviço. Após um mês, os participantes responderam a um questionário de avaliação de satisfação e também foi realizada a análise da ferramenta datalogging. Resultados O site responsivo contou com orientações sobre manutenção e dicas de uso do aparelho de amplificação sonora individual, permitindo fácil acesso às principais orientações ao usuário inexperiente. A análise dos dados demonstrou respostas mais positivas ao questionário pelo grupo estudo, bem como maior tempo de uso diário dos aparelhos de amplificação sonora individuais. Conclusão o grupo que utilizou o site responsivo como ferramenta complementar ao processo de adaptação do aparelho de amplificação sonora individual mostrou, a partir da avaliação da satisfação e dos dados da ferramenta datalogging, maior satisfação e maior tempo de uso diário do aparelho.
ABSTRACT Purpose The hearing aid provides benefits for individuals with hearing impairment. However, low levels of treatment adherence are still observed due to difficulties in the adaptation process. In this sense, the use of websites or applications stands out in order to assist in the process of orienting users. To evaluate the satisfaction of users of hearing aids after using a responsive website designed to assist in the adaptation process. Methods Quantitative analytical experimental study non-randomized clinical trial whit 20 participants, divided into two groups. The study group made use of the responsive website as an aid tool in adapting, in addition to also receiving the guidelines in their traditional format. The control group was guided only with the traditional format already existing in the service. After one month, the participants answered a satisfaction assessment questionnaire, as well as an analysis of the datalogging. Results The responsive website had guidance on maintenance and tips on using the individual hearing aid, allowing easy access to the main guidelines for inexperienced users. The analysis of the data showed more positive responses to the questionnaire by the study group, as well as a longer time of daily use of hearing aids. Conclusion The group that used the responsive website as a complementary tool to the adaptation process of the hearing aid showed, from the assessment of satisfaction and data from the datalogging tool, greater satisfaction and a longer time of daily use of the hearing aid.