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Benefits of bimodal hearing in adolescents and adults with pre-lingual deafness after MED-EL cochlear
de Castro M.M. , de Castro M.C.M. , Becker C.G. , Lopez R. , Maresguia A.C. , Becker H.G. , Guimaraes
Federal University of Minas Gerais, Belo Horizonte, Brazil
Introduction: Adolescents and adults with pre-lingual deafness, despite the restricted indication for cochlear
implants (CI) and limited results, can benefit from this surgery. Furthermore, in the presence of usable residual
hearing in the contra lateral ear, bilateral stimulation can be achieved with bilateral-bimodal fitting - cochlear
implant (CI) in one ear and hearing aid (HA) in the other ear.
Objective: Evaluate improvement in speech perception in adolescents and adults with pre-lingual deafness after
cochlear implantation and evaluate the benefits of bimodal fitting in this group of patients.
Patients and methods: Seventeen adolescents and adults with pre-lingual deafness that underwent cochlear
implant and who used HA in the contralateral ear were evaluated. They were tested for speech perception
preoperatively and postoperatively with CI alone and CI associated with HA.
We also evaluated improves in own speech, lip reading and the advantages of the use of HA associated to CI in
understanding in noise, in location of sound source and perception of better sound quality.
Results: Significant improvement in speech perception was measured after cochlear implant surgery either with
CI as with CI and hearing aids. Bimodal fitting showed better results with statistical significance for most of the
speech perception tests performed compared to the isolated use of cochlear implants.
There was improvement of the lip reading and speech quality, and also in understanding in noise and sound
localization ability.
Conclusion: Adults and adolescents with pre lingual deafness benefit from cochlear implant when subjected to
appropriate selection criteria. This group also benefit from bimodal hearing.