Application of Wireless Contralateral Routing of Signal (CROS) Technology in Unilateral Cochlear Implant Users
Single cochlear implantation usually provides substantial speech intelligibility benefits but bilaterally deaf, unilaterally implanted subjects will continue to experience limitations due to the head shadow effect, like single-sided deaf individuals. In the treatment of individuals with single-sided...
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Published in: | Acta otorrinolaringológica española (English) Vol. 71; no. 6; pp. 333 - 342 |
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01-11-2020
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Abstract | Single cochlear implantation usually provides substantial speech intelligibility benefits but bilaterally deaf, unilaterally implanted subjects will continue to experience limitations due to the head shadow effect, like single-sided deaf individuals. In the treatment of individuals with single-sided deafness one option is contralateral routing of signal (CROS) devices, which constitute a non-surgical intervention of the second ear in unilaterally implanted individuals.
Twelve experienced adult cochlear implant (CI) users with Naída Q70 processor and the CROS device used in combination participated in the study. For the study three conditions were provided: CI only, omnidirectional microphone mode (CROS deactivated); CI plus CROS activated, omnidirectional microphone mode and CI plus CROS activated, UltraZoom mode. Speech reception thresholds were determined in quiet and noise. Subjective feedback regarding the practical usability of the CROS device and the perceived benefit were collected.
There was a 27.6% improvement in speech understanding in quiet and 32.5% improvement in noise when CROS device was activated. Using advanced directional microphones, a statistically significant benefit of 35% was obtained. The responses to the questionnaires revealed that the subjects perceived benefit in their everyday lives when using the CROS device with their CI.
The investigated CROS device used by unilateral CI recipients in cases where bilateral implantation is not an option provides both subjective and objective speech recognition benefit when the signal is directed to the CROS device. Unfavourable conditions where speech is presented from the CI side and noise from the CROS side or diffusely were not included in this evaluation since the CROS device adds additional noise and performance is expected to decrease as has previously been shown.
La implantación unilateral en la hipoacusia profunda bilateral deja al paciente en una situación de audición monoaural, con los consiguientes problemas audiológicos, en especial por la incapacidad de percepción de la palabra en ambientes con ruido de fondo, por el efecto sombra de la cabeza. Se puede mejorar su rendimiento auditivo aprovechando los sistemas inalámbricos de enrutamiento de la señal (CROS), para dotarlos de una entrada de sonido bilateral.
Se estudiaron doce usuarios unilaterales de implante coclear adultos, con experiencia con un procesador de sonido Naída CI Q70 que tiene capacidad de comunicación inalámbrica con el CROS. La comprensión del habla en cabina en silencio y en ruido se llevó a cabo utilizando como estímulos el test de oraciones grabadas en español en tres condiciones: habla dirigida hacia el oído no implantado con y sin CROS activado y habla de frente conUltraZoom. Tras un mes de uso del dispositivo CROS, se evaluó la satisfacción del usuario utilizando cuestionarios.
En silencio, la diferencia media entre el implante unilateral solo y el implante unilateral con el dispositivo CROS fue de 27,6%, mientras que en presencia de ruido fue de 32,5%. Si se comparan las puntuaciones entre presentar activada o no la opción UltraZoom al utilizar CROS, se demuestra un beneficio de un 35% de inteligibilidad. Todos los sujetos puntuaron su experiencia de uso como satisfactoria.
El dispositivo CROS utilizado con CI unilateral, produce un beneficio objetivo y subjetivo en el reconocimiento de la palabra cuando la señal se dirige hacia el mismo. En este estudio no se reprodujo la condición de presentación de la señal verbal en el oído implantado con ruido en el adaptado con el CROS por haberse demostrado previamente que la discriminación verbal se deteriora de forma importante con respecto al implante unilateral sin CROS. |
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AbstractList | Single cochlear implantation usually provides substantial speech intelligibility benefits but bilaterally deaf, unilaterally implanted subjects will continue to experience limitations due to the head shadow effect, like single-sided deaf individuals. In the treatment of individuals with single-sided deafness one option is contralateral routing of signal (CROS) devices, which constitute a non-surgical intervention of the second ear in unilaterally implanted individuals.
Twelve experienced adult cochlear implant (CI) users with Naída Q70 processor and the CROS device used in combination participated in the study. For the study three conditions were provided: CI only, omnidirectional microphone mode (CROS deactivated); CI plus CROS activated, omnidirectional microphone mode and CI plus CROS activated, UltraZoom mode. Speech reception thresholds were determined in quiet and noise. Subjective feedback regarding the practical usability of the CROS device and the perceived benefit were collected.
There was a 27.6% improvement in speech understanding in quiet and 32.5% improvement in noise when CROS device was activated. Using advanced directional microphones, a statistically significant benefit of 35% was obtained. The responses to the questionnaires revealed that the subjects perceived benefit in their everyday lives when using the CROS device with their CI.
The investigated CROS device used by unilateral CI recipients in cases where bilateral implantation is not an option provides both subjective and objective speech recognition benefit when the signal is directed to the CROS device. Unfavourable conditions where speech is presented from the CI side and noise from the CROS side or diffusely were not included in this evaluation since the CROS device adds additional noise and performance is expected to decrease as has previously been shown.
La implantación unilateral en la hipoacusia profunda bilateral deja al paciente en una situación de audición monoaural, con los consiguientes problemas audiológicos, en especial por la incapacidad de percepción de la palabra en ambientes con ruido de fondo, por el efecto sombra de la cabeza. Se puede mejorar su rendimiento auditivo aprovechando los sistemas inalámbricos de enrutamiento de la señal (CROS), para dotarlos de una entrada de sonido bilateral.
Se estudiaron doce usuarios unilaterales de implante coclear adultos, con experiencia con un procesador de sonido Naída CI Q70 que tiene capacidad de comunicación inalámbrica con el CROS. La comprensión del habla en cabina en silencio y en ruido se llevó a cabo utilizando como estímulos el test de oraciones grabadas en español en tres condiciones: habla dirigida hacia el oído no implantado con y sin CROS activado y habla de frente conUltraZoom. Tras un mes de uso del dispositivo CROS, se evaluó la satisfacción del usuario utilizando cuestionarios.
En silencio, la diferencia media entre el implante unilateral solo y el implante unilateral con el dispositivo CROS fue de 27,6%, mientras que en presencia de ruido fue de 32,5%. Si se comparan las puntuaciones entre presentar activada o no la opción UltraZoom al utilizar CROS, se demuestra un beneficio de un 35% de inteligibilidad. Todos los sujetos puntuaron su experiencia de uso como satisfactoria.
El dispositivo CROS utilizado con CI unilateral, produce un beneficio objetivo y subjetivo en el reconocimiento de la palabra cuando la señal se dirige hacia el mismo. En este estudio no se reprodujo la condición de presentación de la señal verbal en el oído implantado con ruido en el adaptado con el CROS por haberse demostrado previamente que la discriminación verbal se deteriora de forma importante con respecto al implante unilateral sin CROS. Single cochlear implantation usually provides substantial speech intelligibility benefits but bilaterally deaf, unilaterally implanted subjects will continue to experience limitations due to the head shadow effect, like single-sided deaf individuals. In the treatment of individuals with single-sided deafness one option is contralateral routing of signal (CROS) devices, which constitute a non-surgical intervention of the second ear in unilaterally implanted individuals. Twelve experienced adult cochlear implant users with Naída Q70 processor and the CROS device used in combination participated in the study. For the study 3 conditions were provided: cochlear implant only, omnidirectional microphone mode (CROS deactivated); cochlear implant plus CROS activated, omnidirectional microphone mode and cochlear implant plus CROS activated, UltraZoom mode. Speech reception thresholds were determined in quiet and noise. Subjective feedback regarding the practical usability of the CROS device and the perceived benefit were collected. There was a 27.6% improvement in speech understanding in quiet and 32.5% improvement in noise when CROS device was activated. Using advanced directional microphones, a statistically significant benefit of 35% was obtained. The responses to the questionnaires revealed that the subjects perceived benefit in their everyday lives when using the CROS device with their cochlear implants. The investigated CROS device used by unilateral CI recipients in cases where bilateral implantation is not an option provides both subjective and objective speech recognition benefit when the signal is directed to the CROS device. Unfavourable conditions where speech is presented from the cochlear implant side and noise from the CROS side or diffusely were not included in this evaluation since the CROS device adds additional noise and performance is expected to decrease as has previously been shown. |
Author | Sandoval-Menéndez, Isabel Súarez-Villanueva, Lorena Llorente-Pendás, José Luis Díaz-Fresno, Estefanía Gómez Martínez, Justo Fernández-Junquera, Ana Belén Núñez-Batalla, Faustino |
Author_xml | – sequence: 1 givenname: Faustino surname: Núñez-Batalla fullname: Núñez-Batalla, Faustino email: fnunezb@telefonica.net organization: Servicio de ORL, Hospital Universitario Central de Asturias, Oviedo, Spain – sequence: 2 givenname: Ana Belén surname: Fernández-Junquera fullname: Fernández-Junquera, Ana Belén organization: Centro Audiológico de Asturias, Oviedo, Spain – sequence: 3 givenname: Lorena surname: Súarez-Villanueva fullname: Súarez-Villanueva, Lorena organization: Centro Audiológico de Asturias, Oviedo, Spain – sequence: 4 givenname: Estefanía surname: Díaz-Fresno fullname: Díaz-Fresno, Estefanía organization: Facultad de Psicología y Logopedia, Universidad de Oviedo, Oviedo, Spain – sequence: 5 givenname: Isabel surname: Sandoval-Menéndez fullname: Sandoval-Menéndez, Isabel organization: Facultad de Psicología y Logopedia, Universidad de Oviedo, Oviedo, Spain – sequence: 6 givenname: Justo surname: Gómez Martínez fullname: Gómez Martínez, Justo organization: Servicio de ORL, Hospital Universitario Central de Asturias, Oviedo, Spain – sequence: 7 givenname: José Luis surname: Llorente-Pendás fullname: Llorente-Pendás, José Luis organization: Servicio de ORL, Hospital Universitario Central de Asturias, Oviedo, Spain |
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Cites_doi | 10.1097/MAO.0000000000002078 10.1097/AUD.0000000000000412 10.1080/14992020400050014 10.1159/000171478 10.1097/AUD.0b013e31815d7467 10.3310/hta13440 10.1097/MOO.0b013e3282ef3d3e 10.1001/archotol.130.5.648 10.1001/archotol.128.11.1255 10.1007/s00405-019-05467-9 10.1002/lary.24873 10.1016/j.otohns.2005.03.014 10.1111/coa.12404 10.1159/000493844 10.3766/jaaa.17121 10.1121/1.408469 10.1067/mhn.2002.123044 10.1080/14670100.2019.1586151 10.1080/14992020600625155 10.1097/MAO.0000000000001269 10.1097/MAO.0000000000000461 10.1016/j.jpeds.2012.04.049 10.1097/AUD.0b013e31806dc21a |
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Copyright | 2020 Sociedad Española de Otorrinolaringología y Cirugía de Cabeza y Cuello Copyright © 2020 Sociedad Española de Otorrinolaringología y Cirugía de Cabeza y Cuello. Publicado por Elsevier España, S.L.U. All rights reserved. |
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Keywords | Implante coclear Enrutamiento contralateral de la señal Contralateral routing of signal Head shadow effect Cochlear implant CROS Efecto sombra de la cabeza |
Language | English |
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Title | Application of Wireless Contralateral Routing of Signal (CROS) Technology in Unilateral Cochlear Implant Users |
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