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1.
CoDAS ; 34(5): e20210071, 2022. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1364749

ABSTRACT

ABSTRACT Purpose The aim of this study was to evaluate the contribution of the CROS system on the head shadow effect in unilateral implant users. Methods Prospective cross-sectional study, approved by the ethics committee under protocol 2.128.869. Eleven adults with post-lingual deafness users of unilateral Advanced Bionics CI were selected. Speech recognition was evaluated with recorded words presented at 65dBA at 0o azimuth and at 90o on the side contralateral to the CI, with noise at 55dBA, using CI alone and CI + CROS system. The results were analyzed using paired t-test with a 0.05 alpha. Results The mean speech recognition scores were significantly better with CI + CROS in relation to the condition of CI alone (p <0.05, p <0.005 and p <0.005 respectively). In the presentation at 0o azimuth, no significant differences were found. Conclusion Users of unilateral CI without useful residual hearing for the use of hearing aids or unable to undergo bilateral surgery can benefit from the CROS device for speech recognition, especially when the speech is presented on the side contralateral to the CI.


RESUMO Objetivo O objetivo deste estudo foi avaliar o efeito do sistema CROS em fenômenos como efeito sombra da cabeça em usuários de implante coclear unilateral. Método Estudo transversal prospectivo, aprovado pelo conselho de ética sob protocolo 2.128.869. Onze adultos com surdez de instalação pós-lingual usuários de IC Advanced Bionics unilateral foram selecionados. O reconhecimento de fala foi avaliado com palavras gravadas apresentadas a 65dBA a 0o azimute e a (90o no lado contralateral ao IC), com ruído a 55dBA, usando somente o IC e IC+sistema CROS. Os resultados foram analisados usando teste t pareado com alfa de 0,05. Resultados Os escores médios de reconhecimento de fala foram significativamente melhores com IC + CROS em relação à condição apenas IC (p <0,05, p <0,005 e p <0,005 respectivamente). Na apresentação à frente não foram encontradas diferenças significantes. Conclusão Os usuários de IC unilateral sem resíduo útil para uso de prótese auditiva ou impossibilitados de submeter-se à cirurgia bilateral podem se beneficiar do dispositivo CROS para o reconhecimento de fala, sobretudo quando a fala for apresentada ao lado contralateral ao IC.

2.
Audiol., Commun. res ; 25: e2237, 2020. tab, graf
Article in Portuguese | LILACS | ID: biblio-1098093

ABSTRACT

RESUMO Objetivo identificar a contribuição do microfone omnidirecional (T-Mic) e microfone direcional adaptativo (UltraZoom) do processador de som Naída CIQ70 para o reconhecimento da fala no ruído e em ambiente reverberante. Identificar a contribuição do processador de som Naída CIQ70 para usuários do processador Harmony. Métodos participaram do estudo sete adultos com implante coclear unilateral, usuários do processador de som Harmony. O reconhecimento de sentenças foi avaliado em silêncio, em sala reverberante (RT60 de 553 ms) e ruído de 42,7 dBA (Leq), com os processadores Harmony e Naída CIQ70. A contribuição do microfone direcional UltraZoom foi avaliada no ruído. As sentenças gravadas foram apresentadas a 0° azimute. O ruído (babble noise) foi apresentado a + 5 dB SNR, a 90° azimute. Os participantes avaliaram subjetivamente a clareza do som e a dificuldade de escutar nas várias condições do teste. Resultados a média do reconhecimento de sentenças no silêncio com reverberação foi de 38,5% com o Harmony e 66,5% com o Naída CIQ70. A pontuação média de reconhecimento de sentenças no ruído foi de 40,5% com o Naída CIQ70, sem UltraZoom, e de 64,5% com UltraZoom. Nas classificações subjetivas de clareza do som e facilidade de escuta no ruído, nenhuma diferença foi identificada entre as condições de teste. Conclusão para usuários experientes do processador de som Harmony, a compreensão da fala em silêncio em uma sala reverbente foi significativamente melhor com o Naída CIQ70. O uso de uma tecnologia de microfone direcional adaptativa (UltraZoom) contribuiu para o reconhecimento de fala no ruído.


Abstract Purpose 1) To measure speech understanding in noise with the Naída Q70 in the omnidirectional microphone mode (T-Mic) and adaptive directional microphone mode (UltraZoom) in reverberating acoustics and noisy conditions. 2) To measure improvement in speech understanding with use of the Advanced Bionics (AB) Naída Q70 sound processor for existing Harmony users. Methods Seven adult unilateral cochlear implant (CI) recipients, who were experienced users of the Harmony sound processor, participated in the study. Sentence recognition was evaluated in quiet in a reverberating room, with Harmony and Naída CI Q70 processors. Effectiveness of Naída CI Q70's UltraZoom directional microphone was evaluated in noise. Target stimuli were recorded Portuguese sentences presented from 0° azimuth. Twenty-talker babble was presented at +5dB SNR from ±90° azimuth. In addition to sentence recognition, the participants also rated the clarity of sound and difficulty of listening in the various test conditions. In order to evaluate the outcomes under more realistic acoustic conditions, tests were conducted in a non-sound treated reverberant room (RT60 of 553 ms and noise floor of 42.7 dBA (Leq). Results The average sentence recognition in quiet in the reverberant non-sound treated room was 38.5% with the Harmony and 66.5% with Naída CI Q70. The average sentence recognition score in noise was 40.5% with Naída CI Q70 without UltraZoom and 64.5% with UltraZoom. For subjective ratings of sound clarity and listening ease in noise no difference were identified between the test conditions. Conclusion For experienced users of the Harmony sound processor, speech understanding in quiet in a reverberating room was significantly improved with the Naída CI Q70. The use of an adaptive directional microphone technology (UltraZoom) enhanced speech perception in noise.


Subject(s)
Humans , Male , Female , Adult , Cochlear Implantation , Speech Recognition Software , Speech Acoustics , Speech Intelligibility , Speech Perception , Hearing Loss, Bilateral , Noise
3.
Rev. cuba. med. trop ; 56(3): 192-196, sep.-dic. 2004.
Article in Spanish | LILACS | ID: lil-629331

ABSTRACT

Se creó un programa a partir de 1988 por las autoridades de salud en Cuba, en el cual se trazó como meta eliminar el sarampión, la rubéola y la parotiditis. Sus bases fundamentales fueron alcanzar coberturas de vacunación superiores a 95 % con la vacuna triple viral (sarampión, rubéola y parotiditis), implantar un sólido sistema de vigilancia seroepidemiológica y lograr medidas de control de foco, con lo cual cesaría la transmisión del virus salvaje productor de estas entidades. Con el fin de conocer el estado inmune de la población a más de 10 años de iniciarse la vacunación con la triple viral, se realizó una encuesta seroepidemiológica a una muestra representativa de la población cubana entre 7 meses y 23 años. Se estudió un total de 1 593 muestras mediante la prueba de inhibición de la hemaglutinación. La prevalencia de anticuerpos detectada fue de 86,75 % para sarampión, 64,72 % para rubéola y 86 % para parotiditis. La inmunidad a los virus del sarampión y rubéola fue menor en el grupo de 6 a 10 años y en el caso de la parotiditis en los niños entre 2 y 5 años. Se sugirió incluir en el programa nacional de vacunación, una segunda dosis de la vacuna triple viral en los niños de 6 años o más, para eliminar la circulación de estos agentes infecciosos en la población.


The Cuban health authorites implemented a program in 1988 aimed at eradicating measles, rubella and parotiditis. Its fundamental bases were to attain vaccination coverages over 95 % with the viral triple vaccine (measles, rubella and parotiditis), to establish a solid system of seroepidemiological surveillance and to take measures to control the focus, with which the trasmission of the wild virus producing these entities would stop. In order to know the immune state of the population a seroepidemiological survey was done in a representative sample of the Cuban population from 7 months old to 23 years old. A total of 1 593 samples were studied by the hemagluttination inhibition test. The prevalence of antibodies detected was 86.75 % for measles, 64.72 % for rubella and 86 % for parotiditis. The immunity to the measles and rubella viruses was slower in the group aged 6-10 and in children aged 2-5 in the case of parotiditis. It was suggested to include in the national vaccination program a second dose of the viral triple vaccine in children 6 or over to eliminate the circulation of these infectious agents in the population.

4.
Rev. cuba. med. trop ; 55(2)mayo.-ago. 2003. tab, graf
Article in Spanish | LILACS | ID: lil-386992

ABSTRACT

Se empleó la técnica de neutralización por reducción del número de placas (NRNP) para la detección de anticuerpos antirrábicos en personal de riesgo. Se estudiaron muestras de suero de individuos de alto riesgo y personas con antecedentes de vacunación y sin estos. La técnica de neutralización fue comparada con la prueba biológica en ratón y como resultado del estudio se obtuvo una concordancia de 100 por ciento. Se encontró que el sexo no influye en la respuesta de anticuerpos a este virus, aunque el contacto directo y la cantidad de veces que el individuo ha recibido la vacuna actúan positivamente en la respuesta inmune. La introducción de esta técnica en el laboratorio permite contar con una herramienta útil, en el seguimiento del personal que recibe vacunación preexposición y posexposición al virus rábico


Subject(s)
Humans , Animals , Mice , Rabies , Serologic Tests , Rabies Vaccines/immunology , Neutralization Tests/methods
5.
Rev. cuba. med. trop ; 52(3): 211-214, Sept.-Dec. 2000.
Article in Spanish | LILACS | ID: lil-333469

ABSTRACT

225 monosera from patients (121 adults and 104 children) with different malignant haemopathies from the Institute of Hematology were studied. The hemagglutination inhibition (HI) technique and the neutralization technique were used to know the presence of antimeasles antibodies. All these patients were under immunosuppression treatment at the time of taking the specimen and children had received the triple viral vaccine (measles, rubella, parotiditis) before the disease was diagnosed. It was found that 51 (42.14) of the adults' specimens were positive by HI and of the 25 negative specimens that underwent the neutralization technique, 18 (72) proved to be positive. Of the 104 sera corresponding to children, 31 (29.8) specimens were positive by HI, whereas 29 of the negative were studied by neutralization. 18.34 of all the specimens continued to be negative by both methods. According with the 2 techniques used, the presence of measles virus antibodies was of 81.66 in children and of 90.78 in adults.


Subject(s)
Humans , Child , Adult , Antibodies, Viral , Leukemia , Lymphoma , Measles virus/immunology
6.
Rev. cuba. med. trop ; 48(1): 59-61, ene.-abr. 1996. tab
Article in Spanish | LILACS | ID: lil-185384

ABSTRACT

Se realizo la evaluacion de un Dot ELISA elaborado por el Centro de Ingenieria Genetica y Biotecnologia, para la deteccion de antigeno de Rotavirus. Se analizaron 100 muestras de heces fecales por esta tecnica y los resultados fueron comparados con los obtenidos con la electroforesis en gel de poliacrilamida, tecnica empleada en el diagnostico de Rotavirus. Se obtuvo una alta coincidencia, especificidad y sensibilidad entre estos


Subject(s)
Antigens/analysis , Electrophoresis, Polyacrylamide Gel , Enzyme-Linked Immunosorbent Assay , Evaluation Study , Feces , Rotavirus
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