RESUMEN

Sensorineural hearing loss has a high incidence in our population; as a matter of fact, 50% of people above 75 years of age suffer this impairment. Due to the advances in the devices to alleviate this condition and their verified efficacy, it is now appropriate to review the indications for these devices and provide a detailed description of the audioprosthetic systems used. These systems can be classified as external non-implantable devices (hearing aids) and implantable prostheses. The latter can be sub-divided into active implants in the external ear or middle ear, cochlear implants, and auditory brainstem implants (ABI). Indications for each group are determined by the type and location of the underlying condition as well as by the anatomic, functional, and social characteristics of each patient. It must be stressed that the selection and monitoring of the treatment is up to the specialist. Generally speaking, an attempt is made to facilitate the integration of the hypoacusic patients to their sound setting by enhancing their understanding of the spoken word and restoring binaurality, while at the same time, seeking to retain the plasticity of central auditory routes through the stimulation provided by any of these systems. In the course of this review, we refer to newly-emerging indications in both the field of cochlear implants (bimodal stimulation, implantation in patients with residual hearing, bilateral implants, etc) and in the area of ABI in patients with tumoural disease previously treated with radiosurgery or patients with non-tumour pathologies presenting malformations or bilateral cochlear ossification.

Asunto(s)

RESUMEN

La hipoacusia neurosensorial tiene alta incidencia en nuestra población. Sirva de ejemplo que el 50 % de las personas mayores de 75 años tiene este tipo de discapacidad. Los avances en los dispositivos utilizados para su tratamiento paliativo y su eficacia comprobada hacen necesaria la revisión de sus indicaciones y la descripción detallada de los sistemas audioprotésicos empleados. Éstos pueden ser clasificados en prótesis externas no implantables (audífonos) y prótesis implantables. El grupo de las prótesis implantables se subdivide a su vez en implantes activos de oído externo, implantes activos de oído medio, implantes cocleares e implantes auditivos de tronco cerebral (IATC). Las indicaciones establecidas para cada grupo audioprotésico se definen por la tipología y la topología de la enfermedad subyacente y por las características anatomofuncionales y socioculturales de cada paciente. En esta cuestión debe hacerse hincapié en el protagonismo del especialista a la hora de elegir y seguir el tratamiento. Como norma general, se procura favorecer el acceso del paciente hipoacúsico a su entorno sonoro realzando la comprensión de la palabra hablada restableciendo la binauralidad y, a la vez, se busca mantener la plasticidad de las vías auditivas centrales a través de la estimulación proporcionada por cualquiera de estos sistemas. Se expone las indicaciones emergentes, ya sea en el campo de los implantes cocleares (estimulación bimodal, implantación en pacientes con audición residual, implantaciones bilaterales, etc.) o en el campo de los IATC, en pacientes con afección tumoral previamente tratada con radiocirugía y en pacientes con trastornos no tumorales afectos de osificación coclear bilateral o malformaciones

Sensorineural hearing loss has a high incidence in our population; as a matter of fact, 50 % of people above 75 years of age suffer this impairment. Due to the advances in the devices to alleviate this condition and their verified efficacy, it is now appropriate to review the indications for these devices and provide a detailed description of the audioprosthetic systems used. These systems can be classified as external non-implantable devices (hearing aids) and implantable prostheses. The latter can be sub-divided into active implants in the external ear or middle ear, cochlear implants, and auditory brainstem implants (ABI). Indications for each group are determined by the type and location of the underlying condition as well as by the anatomic, functional, and social characteristics of each patient. It must be stressed that the selection and monitoring of the treatment is up to the specialist. Generally speaking, an attempt is made to facilitate the integration of the hypoacusic patients to their sound setting by enhancing their understanding of the spoken word and restoring binaurality, while at the same time, seeking to retain the plasticity of central auditory routes through the stimulation provided by any of these systems. In the course of this review, we refer to newly-emerging indications in both the field of cochlear implants (bimodal stimulation, implantation in patients with residual hearing, bilateral implants, etc) and in the area of ABI in patients with tumoural disease previously treated with radiosurgery or patients with non-tumour pathologies presenting malformations or bilateral cochlear ossification

Asunto(s)