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Original Article

Some benefits and limitations of binaural cochlear implants and our ability to measure them

Algunos beneficios y limitaciones de los implantes cocleares binaurales y nuestra capacidad para medirlos

, , &
Pages 113-119 | Published online: 07 Jul 2009
 

Abstract

We review new recognition and localization skills in patients using one or two cochlear implant(s). We observed one unilateral patient who showed localization performance above chance. We also provide evidence for binaural processing in bilateral cochlear implant patients, even when tested with speech from the front without noise. We unsuccessfully attempted to find correlations between localization and squelch, between these variables and pre-implant threshold differences, or these variables and post-implant recognition differences. We strongly believe that new tests are needed to examine the potential benefit of two implants. We describe three tests that we use to show a binaural advantage: cued recognition, movement direction, and recognition with multiple jammers.

Acronyms
CI=

Cochlear implant

SRT=

Speech recognition test

HA=

Hearing aid

CI/HA=

Electrical-acoustic short electrode cochlear implant

Acronyms
CI=

Cochlear implant

SRT=

Speech recognition test

HA=

Hearing aid

CI/HA=

Electrical-acoustic short electrode cochlear implant

Sumario

Revisamos nuevas habilidades de reconocimiento y localización en usuarios de uno o dos implantes cocleares (IC). Observamos un paciente con implantación unilateral que mostró rendimiento para localización por encima del azar. También mostramos evidencia del procesamiento binaural en usuarios de dos IC, incluso cuando fueron examinados con lenguaje al frente y sin ruido. Intentamos sin éxito encontrar correlaciones entre localización contínua o intermitente, entre estas variables y las diferencias de umbrales pre-implante o entre estas variables y las diferencias de reconocimiento post-implante. Creemos firmemente que se requieren nuevas pruebas para examinar el beneficio potencial de dos implantes. Describimos tres pruebas que usamos para mostrar la ventaja binaural: reconocimiento de claves, dirección del movimiento y reconocimiento en presencia de interferencias múltiples.

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