This is a prospective multicenter multinational randomized control trial. The duration of the study for the individual patient will be approximately 1 year (pre-operative assessments, 1 week, 3 months and 12 months follow-up assessments). Participants will be randomized to one of two surgical approaches: eRW or CO, with a 1:1 allocation in a parallel design.
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Eligibility Criteria
Inclusion Criteria:
* Individuals aged 18 years and older who have clinically established post-linguistic sensorineural hearing loss.
* CI candidate based on local or national reimbursement criteria.
* Cochlear implantation with a CI632.
* Preoperative 500 Hz pure-tone air conduction threshold \<80…
Inclusion Criteria:
* Individuals aged 18 years and older who have clinically established post-linguistic sensorineural hearing loss.
* CI candidate based on local or national reimbursement criteria.
* Cochlear implantation with a CI632.
* Preoperative 500 Hz pure-tone air conduction threshold \<80 dB hearing level (HL) in the ear to be implanted.
* Willing and able to provide written informed consent.
Exclusion Criteria:
* Previous or existing CI recipient.
* Ossification or other anatomical abnormalities of the cochlea or its windows possibly affecting normal electrode array insertion.
* Abnormal cochlear nerve anatomy on preoperative CT or MRI.
* Subjects who are unable to undergo CT or MRI.
* Deafness due to acoustic nerve or central auditory pathway lesions.
* Diagnosis of auditory neuropathy.
* Active middle ear infection.
* Additional handicaps that would prevent participation in study evaluations.
* Unrealistic expectations from the participant regarding the possible benefits, risks, and limitations inherent to the CI procedure and the investigation.
* Cochlear employees or employees of Contract Research Organisations or contractors engaged by Cochlear for the purposes of this investigation.
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