OBJECTIVE: To present the first reported case of intraneural direct cochlear nerve stimulation in a human being. RESULTS: A 23-year-old patient with bilateral progressive hearing loss associated with bilateral complete semicircular canal aplasia and ossified cochleas underwent cochlear implantation. During surgery, a patent cochlear lumen could not be found, and the array was positioned in the internal auditory canal adjacent to the cochlear nerve. Against our expectations, an assiduous rehabilitation and frequent fitting adjustments have led to a word recognition score, in open set speech with lip reading, of 18/25 and acceptable frequency discrimination. CONCLUSIONS: We are aware that this was an anomalous use of the cochlear implant, and it is not our aim to suggest a new indication for cochlear array positioning. However, this case shows that auditory perception, to some degree, can be obtained with intraneural direct cochlear nerve stimulation.

Cochlear nerve stimulation in the internal auditory canal in ossified cochlea: A case study

CANALE, Andrea;DAGNA, FEDERICO;LACILLA, Michelangelo;MONTUSCHI, CARLA;DI ROSA, ROSALBA;ALBERA, Roberto
2015

Abstract

OBJECTIVE: To present the first reported case of intraneural direct cochlear nerve stimulation in a human being. RESULTS: A 23-year-old patient with bilateral progressive hearing loss associated with bilateral complete semicircular canal aplasia and ossified cochleas underwent cochlear implantation. During surgery, a patent cochlear lumen could not be found, and the array was positioned in the internal auditory canal adjacent to the cochlear nerve. Against our expectations, an assiduous rehabilitation and frequent fitting adjustments have led to a word recognition score, in open set speech with lip reading, of 18/25 and acceptable frequency discrimination. CONCLUSIONS: We are aware that this was an anomalous use of the cochlear implant, and it is not our aim to suggest a new indication for cochlear array positioning. However, this case shows that auditory perception, to some degree, can be obtained with intraneural direct cochlear nerve stimulation.
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Cochlear implant; Cochlear nerve; Otology; Cochlear Diseases; Cochlear Nerve; Disease Progression; Electric Stimulation; Hearing Loss; Humans; Male; Ossification, Heterotopic; Postoperative Period; Prosthesis Fitting; Semicircular Canals; Speech Perception; Treatment Outcome; Young Adult; Cochlea; Cochlear Implantation; Otorhinolaryngology2734 Pathology and Forensic Medicine; Medicine (all)
Canale, Andrea; Dagna, Federico; Lacilla, Michelangelo; Montuschi, Carla; Di Rosa, Rosalba; Albera, Roberto
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/1572845
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