Potencial Evocado Auditivo de Longa Latência em crianças com deficiência auditiva sensorioneural e usuárias de aparelho de amplificação sonora individual

• Autor(a) principal: Freitas, Thaysa Vidal Dias de
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da PUC_SP
• Texto Completo: https://tede2.pucsp.br/handle/handle/11978
• topic: Potenciais evocados auditivos; Plasticidade neuronal; Auxiliares de audição; Perda auditiva; Criança; Auditory evoked potentials; NJeuronal plasticity; Hearing aids; Hearing loss; Child; CNPQ::CIENCIAS DA SAUDE::FONOAUDIOLOGIA

To describe the results of long latency auditory evoked potentials, P1-N1-P2 complex, in children with sensorineural hearing impairment and hearing aids users. Method: 10 children with congenital bilateral sensorineural hearing impairment, with symmetrical configuration and moderate to profound degree of hearing loss, were subjects of the present study, age ranging between 2 and 8 years old. The subjects were followed up in a hearing health center in Sao Paulo. Data were collected concerning to the degree of hearing loss, auditory age, age when hearing aids were adapted, approach for speech therapy, and systematic use of hearing aids. The Long Latency Auditory Evoked Potentials (LLAEP) were recorded using insert earphones at 85dBSPL, without hearing aids; the same test was performed in free field at 100dBSPL, with loudspeaker positioned at 90 degrees, aside of the better ear, with subjects using their hearing aids. The equipment used has two recording channels, one to record the LLAEP and the other to record the eyes movements to control the artifact generated. Two recordings were collected to verify the reproducibility of the waves. Results: The latency values of the components P1-N1-P2 in unaided and aided tests were statistically analyzed and described according to the variables. The volunteers with absence of LLEAP in the unaided test had severe and profound hearing loss. When the test was performed with hearing aids through sound field all subjects showed LLEAP. There was significance correlation between auditory age and P1-N1 latency. In the analysis between onset age of hearing aids use, weekly hours of therapy, approach in language therapy, and systematic use of hearing aids, there was no association with the P1-N1-P2 latency. Conclusion: Subjects with moderate degree of hearing loss showed presence of LLAEP in aided and unaided tests; volunteers with severe and profound degree of hearing loss showed absence of LLAEP in unaided tests. All volunteers showed presence of LLAEP in the aided test, independent of the degree of hearing loss. The latency value of P1 was increased, regardless of auditory age