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Original Article

Can adolescents and young adults with prelingual hearing loss benefit from a second, sequential cochlear implant?

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Pages 368-377 | Received 26 Mar 2009, Accepted 02 Nov 2009, Published online: 24 Feb 2010
 

Abstract

Abstract

This study aimed to determine if adolescents/young adults gained additional perceptual benefit from sequential bilateral cochlear implants within 12 months, and to document adaptation to the second implant. Assessments comprised a pediatric version of The Speech, Spatial and Qualities of Hearing Scale (SSQ), anecdotal reports of device use and daily listening, and the Adaptive Spondee Discrimination Test (AdSpon). All nine participants achieved full-time use of, a preference for, and superior daily listening with, bilateral implants. Eight participants were comfortable using the second implant alone, and two achieved similar daily listening with either implant alone. SSQ ratings were higher post-operatively for the majority of participants. AdSpon performance was superior bilaterally for five participants with noise ipsilateral to the first implant, but not contralateral. Unilateral performance with either implant was similar for one participant. A second implant may provide additional benefit up to 19 years of age, even with congenital hearing loss and >16 years between implants. Families and clinicians should understand the aspects of second-implant candidacy and post-operative use that are unique to adolescents/young adults.

Sumario

El objetivo del estudio fue determinar si los adolescentes y adultos jóvenes obtenían un beneficio adicional con implantes cocleares bilaterales secuenciales en un periodo de 12 meses, y documentar la adaptación al segundo implante. La evaluación comprendió una versión pediátrica de la Escala para el Lenguaje, la Audición Espacial y las Cualidades Auditivas (SSQ), reportes anecdóticos de uso de dispositivos y escucha cotidiana; y la Prueba Adaptativa de Discriminación de Espondaicas (AdSpon). Los nueve participantes lograron el uso por tiempo completo, la preferencia por, y la escucha superior cotidiana con los implantes bilaterales. Ocho participantes se sintieron a gusto con el segundo implante solamente y dos lograron condiciones de escucha similares con cualquiera de los implantes individualmente. Las puntuaciones de SSQ fueron más altas en el postoperatorio para la mayoría de los participantes. Para seis participantes, el desempeño en la AdSpon fue superior en la condición bilateral con ruido ipsilateral en el primer implante, pero no en el contralateral. El desempeño unilateral con cualquiera de los implantes fue similar para un participante. Un segundo implante puede proporcionar beneficio adicional hasta los 19 años de edad, aun en el caso de hipoacusia congénita y más de 16 años entre implantes. Las familias y los clínicos deben entender los aspectos para la candidatura de un segundo implante y su uso postoperatorio que son singulares para los adolescentes y los adultos jóvenes.

Acknowledgements

The authors are very grateful to the children and families who participated, and to the clinicians and surgeons of the Royal Victorian Eye and Ear Hospital Cochlear Implant Clinic who provided audiological and medical care. Thanks are also due to Dr David Grayden for writing the AdSpon software; Dr Richard van Hoesel for providing the localization software and helpful comments in the early planning stages; and Mark Harrison for technical support. Financial support for this work was provided by The University of Melbourne’s Department of Otolaryngology; The Bionic Ear Institute, Melbourne; The Royal Victorian Eye and Ear Hospital, Melbourne; The William Angliss Foundation; and The Collier Fund.

Declaration of Interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

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