Audiometric evolution in multichannel cochlear implant users/Evolucao audiometrica em usuarios de implante coclear multicanal

• Published in: Revista CEFAC 2013-03, Vol.15 (2), p.297
• Main Authors: Hoshino, Ana Cristina Hiromi, da Cruz, Dorilan Rodriguez, Goffi-Gomez, Maria Valeria Schmidt, Befi-Lopes, Debora Maria, Matas, Carla Gentile, Fortunato-Tavares, Talita M, Tsuji, Robinson Koji
• Format: Article
• Language: Spanish
• ISSN: 1516-1846
• DOI: 10.1590/S1516-18462012005000037

Purpose: to evaluate how long after activation one can achieve the desired auditory thresholds in individuals multichannel cochlear implant users from different age groups. Method: a retrospective cross-sectional from a database, approved by CEP / FMUSP, under number 779/06. Individuals implanted between January 2005 and September 2008, whose files had preoperative audiometric data and 3, 6 and 12 months after CI were included. Seventy-two patients fulfilled the criteria, and they were divided in two groups according to age: group I (17 year old) and GII (18-66 year old). Analysis of variance (ANOVA) of one factor in order to verify the interaction between the mean threshold and time after CI were used. Results: we observed that 15 of the GI have reached around 30dBNA thresholds at 3 months after implant. The same happened to 26 patients of GII. We found significant interaction between time (F (3.140) = 91.973, p = 0.00) and the average hearing thresholds. Post-hoc analysis in the GI group were statistically significant differences for comparisons between HA and 3 months after implantation (p = 0.00) and between 3 and 12 months (p = 0.28). For GII only for comparison between HA and 3 months (p = 0.00). Conclusion: a significant hearing change may be observed beginning from three months after IC, but this result is not found in all implanted subjects. KEYWORDS: Cochlear Implantation; Audiometry; Auditory Threshold Objetivo: analisar em quanto tempo apos a ativacao e possivel alcancar os limiares auditivos desejados nos individuos usuarios de implante coclear (IC) multicanal de diferentes faixas etarias. Metodo: estudo seccional retrospectivo a partir de banco de dados, aprovado pelo CEP/HCFMUSP, sob numero 779/06. Foram incluidos individuos implantados no periodo de Janeiro de 2005(inicio da formacao do banco de dados) a Setembro de 2008(termino da coleta de dados), cujos prontuarios possuiam dados dos limiares audiometricos pre-implante e 3, 6 e 12 meses apos o IC. Setenta e dois pacientes contemplaram os criterios, divididos em dois grupos por faixa etaria: GI (ate 17 anos) e GII (18 a 66 anos). Foi utilizada a Analise de Variancia (ANOVA) de um fator para verificar a interacao entre as medias dos limiares audiometricos e o tempo apos o IC. Resultados: observou-se que 15 do grupo GI ja alcancaram limiares em torno de 30dBNA aos 3 meses pos implante. O mesmo aconteceu com 26 pacientes do grupo GII. Encontrou-se interacao significante entre tempo (F(3,140)=