Liege Franzini Tanamati

Longitudinal study of the ecap measured in children with cochlear implants

UNLABELLED In children with cochlear implant (CI), the recording of the electrically evoked compound action potential (ECAP) of the auditory nerve represents an option to assess changes in auditory nerve responses and the interaction between the electrode bundle and the neural tissue over time. AIM To study ECAP in children during the first year of CI use. MATERIALS AND METHODS The ECAP characteristics have been analyzed in 13 children implanted younger than three years of age. Series study. RESULTS During the first year of CI use there was a significant statistical raise in the N1 peak amplitude, in basal electrodes, between the second and third return visits. There were not any significant differences obtained for N1 peak, latency, slope, p-NRT or recovery time, in the return visits. CONCLUSION During the first year of CI use, the electrical stimulation provided by the intracochlear electrodes did not cause significant changes to ECAP characteristics, except for an increase in N1 peak amplitude.

Avaliação longitudinal do ECAP registrado em crianças usuárias de implante coclear

Em criancas usuarias de Implante Coclear (IC), o registro do potencial de acao composto do nervo auditivo evocado eletricamente (ECAP) representa uma maneira de avaliar as modificacoes nas respostas neurais e entre o feixe de eletrodos e o tecido neural ao longo do tempo. OBJETIVO: Estudar o ECAP em criancas ao longo do primeiro ano de uso do IC. MATERIAL E METODO: As caracteristicas do ECAP foram analisadas em 13 criancas, implantadas com idades inferiores a tres anos de idade. Estudo de serie. RESULTADOS: Houve aumento estatisticamente significante na amplitude do pico N1, nos eletrodos basais, entre o segundo e o terceiro retorno. Nao foram obtidas diferencas significantes para: a latencia do pico N1, o slope, o p-NRT e o periodo de recuperacao entre os retornos. Nos tres retornos, a maioria dos sujeitos apresentou tempo de recuperacao entre 1000 e 2000µs. CONCLUSAO: Ao longo do primeiro ano de uso do IC, a estimulacao eletrica liberada pelos eletrodos intracocleares nao causou alteracoes significativas as caracteristicas do ECAP, exceto pelo aumento da amplitude do pico N1.

Implante coclear em crianças pós-linguais: resultados funcionais após 10 anos da cirurgia

UNLABELLED The benefits of cochlear implants (CI) for communication skills are obtained over the years. There are but a few studies regarding the long-term outcomes in postlingual deaf children who grew up using the electronic device. AIM To assess the functional results in a group of postlingual children, 10 years after using a CI. METHODS Ten postlingual deaf children, implanted before 18 years of age, participated in this study. We assessed: sentence recognition and speech intelligibility. We documented: device use and function and the patients academic/occupational status. STUDY DESIGN series. RESULTS The mean scores were 73% for sentence recognition in silence and 40% in noise. The average write-down intelligibility score was 92% and the average rating-scale intelligibility score was 4.15. There were no cases of device failure. Regarding educational/vocational status, three subjects graduated from the University. Five quit education after completing high school. Eight subjects had a professional activity. CONCLUSION This study showed that cochlear implantation is a safe and reliable procedure. The postlingual profoundly hearing-impaired children after 10 years of CI use developed satisfactory levels regarding speech perception and intelligibility, and completed at least high school and were inserted in the labor market.

Uso do Sistema FM em implante coclear

Objetivo Verificar o uso do Sistema de Frequencia Modulada (FM) e o beneficio deste dispositivo em usuarios de implante coclear. Metodo Analise de prontuarios dos 113 usuarios de Implante Coclear (IC), adaptados com kits de Sistema FM, entre setembro de 2013 e 2015, apos publicacao da Portaria 1.274 de 25/6/2013, referentes aos resultados dos testes de percepcao de fala (TPF) e dos questionarios Listening Inventory For Education – Revised (LIFE-R) e Classroom Participation Questionnaire (CPQ). Resultados O uso do Sistema FM em sala de aula foi efetivo por 47,15% dos pacientes, enquanto 21,42% nao o utilizaram. Nao houve correlacao entre o uso do Sistema FM e a faixa etaria dos pacientes. Os resultados nos TPF no ruido foram estatisticamente melhores com o uso do FM. Em relacao aos questionarios, a pontuacao obtida na situacao “apos uso do Sistema FM”, no questionario LIFE-R, foi estatisticamente melhor para o item “situacoes de escuta em sala de aula” e, no questionario CPQ, para os itens “compreensao dos professores e aspectos positivos”, quando comparada a da situacao “sem uso do Sistema FM”. Conclusao Os pacientes beneficiados com a concessao do Sistema FM fizeram uso do dispositivo em sala de aula e mostraram melhora tanto na percepcao da fala no ruido quanto na impressao subjetiva da compreensao da fala do professor em sala de aula, apos o uso do Sistema FM.

Use of remote control in the intraoperative telemetry of cochlear implant: multicentric study

INTRODUCTION The conventional evaluation of neural telemetry and impedance requires the use of the computer coupled to an interface, with software that provides visualization of the stimulus and response. Recently, a remote control (CR220®) was launched in the market, that allows the performance of intraoperative tests with minimal instrumentation. OBJECTIVE To evaluate the agreement of the impedance values and neural telemetry thresholds, and the time of performance in the conventional procedure and by the remote control. METHODS Multicentric prospective cross-sectional study. Intraoperative evaluations of cochlear implants compatible with the use of CR220® were included. The tests were carried out in the 22 electrodes to compare the time of performance in the two situations. The agreement of the neural telemetry threshold values obtained from five electrodes was analyzed, and the agreement of impedance was evaluated by the number of electrodes with altered values in each procedure. RESULTS There were no significant difference between the impedance values. There was a moderate to strong correlation between the electrically-evoked compound action potential thresholds. The mean time to perform the procedures using the CR220 was significantly lower than that with the conventional procedure. CONCLUSION The use of the CR220 provided successful records for impedance telemetry and automatic neural response telemetry.