[en] INTRODUCTION: severe-profound hearing impairment affects 1 out of 1.000 newborns and it is every time affecting more and more people over 65 years old. The cochlear implants have become the most effective measure when it comes to palliative methods. In fact, there are 1.6500 people in Spain wearing it. Despite the improvements in the ability to process sounds after the surgery, 75% of patients show vestibular symptoms. However, the symptomatology being caused by the cochlear implants is still a controversial topic; therefore no systematic revision has ever made a comprehensive analysis providing conclusive data. OBJECTIVE: knowing whether cochlear implants produce a certain effect on balance when it comes to people who suffer from hearing affections. Moreover, if this situation turns out to actually be the case, it will try to find out the type of influence that is generated, regardless whether it is a positive or negative one. MATERIALS AND METHODS: the data research was carried out through health sciences data bases: Cochrane Library Plus, PEDro, PubMed, Scopus and Web of Science from April 2019 to May 2019. The methodological quality was assessed through PEDro scale while the scientific evidence and grade of recommendation were assessed through Oxford scale. RESULTS: 13 studies suiting the aforementioned criteria were selected. No relationship between the cochlear implant and the maintenance of balance was found in one of these studies before and after setting it. Two studies prove a certain influence of the cochlear implants on balance but they do not clarify whether it is beneficial or harmful. Among those who do vouch for a bond, one of them claims this influence to be beneficial after comparing the difference between having the device on and off. Finally, 9 studies guarantee that cochlear implants are harmful when it comes to the ability of maintaining balance. CONCLUSIONS: due to the fact that the analyzed data show moderate-low scientific evidence and grade of recommendation, we point at the need of future studies that comprise a greater number of participants with a bunch of similar evidences that enable us to make tantamount comparisons between themselves. Nevertheless, the analyzed data in this systematic revision prove that it cannot be stated that cochlear implants have a positive effect on the vestibular function. Plus, this effect becomes harmful when the subjects who have the cochlear implant are kids and/or the patients are exposed to sensory interests such as deprivation of visual system or the incorporation of unstable surfaces.

[gl] INTRODUCIÓN: a hipoacusia severa-profunda afecta a 1 de cada 1.000 neonatos e cada vez a máis persoas maiores de 65 anos. Como método paliativo, o IC resultou ser a medida máis eficaz; porén, en España utilízano 16.500 persoas. Pero a pesar das melloras sobre a capacidade para procesar sons tras a intervención cirúrxica, o 75% dos doentes refiren síntomas vestibulares. Non obstante, que a sintomatoloxía se deba ao IC segue sendo un tema de controversia, xa que ningunha revisión sistemática realizou unha análise exhaustiva que aporte datos concluíntes. OBXECTIVO: coñecer se existe un efecto do implante coclear sobre o equilibrio de persoas que sofren unha afectación auditiva. Ademais, no caso afirmativo, procúrase atopar o tipo de influencia que xera, xa sexa positivo ou negativo. MATERIAL E MÉTODOS: a busca de información realizouse nas bases de datos de ciencias da saúde Cochrane Library Plus, PEDro, PubMed, Scopus e Web of Science entre os meses de abril e maio de 2019. A calidade metodolóxica avaliouse ca escala PEDro, e a evidencia científica e grao de recomendación ca escala Oxford. RESULTADOS: seleccionáronse 13 estudos que cumprisen cos criterios descritos. Nun deles non se atopou relación entre o IC e o mantemento do equilibrio tras comparalo antes e despois da colocación do IC. Dous estudos evidencian unha influencia do IC sobre o equilibrio sen aclarar que sexa beneficioso ou prexudicial. Entre aqueles que si acreditan un vínculo, 1 apunta que é beneficioso tras realizar comparacións entre o dispositivo acendido e apagado. Por último, 9 estudos afirman que o IC é prexudicial para a capacidade de manter o equilibrio. CONCLUSIÓNS: debido a que os estudos analizados presentan unha evidencia científica e grao de recomendación moderada-baixa, apúntase a necesidade de futuros estudos que engloben un maior número de participantes, cunha serie de probas similares e realizando comparacións equiparables entre elas. Pola contra, os estudos analizados na presente revisión sistemática, demostran que non se pode afirmar que o IC teña un efecto positivo sobre a función vestibular. Ademais, este efecto vólvese prexudicial cando os individuos son rapaces e/ou sométese aos doentes a alteracións sensoriais tales como a privación do sistema visual ou a incorporación de superficies inestables.