The influence of cochlear morphology, insertion angle and - depth, scalar location and position of the first basal electrode following cochlear implantation on speech perception and auditory capacity regarding different electrode arrays; comparing patients following reimplantation, patients with residual hearing and separating patients under and over the age of 70
- Conditions
- H90Conductive and sensorineural hearing loss
- Registration Number
- DRKS00019807
- Lead Sponsor
- Klinik für Hals- Nasen- Ohrenheilkunde
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Complete
- Sex
- All
- Target Recruitment
- 1000
Inclusion Criteria
Retrospective analysis of CI implanted patients with a device of Cochlear™ (Elektrodentyp: Contour, Contour Advance, Slim straight, slim modular) or MED-EL (SONATA, SYNCHRONY, CONCERTO). Only adults over 18 y.
Exclusion Criteria
Implantation of other manufacturers or with other electrode arrays. patients with signs of sclerosis, following meningitis or labyrinthitis, children, malformations or if the CT scans are not sufficient.
Study & Design
- Study Type
- observational
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method 1. Scalar position depends on cochlear size. <br>2. scala tympani inserted electrode arrays show better results in postoperative speech perception. <br>3. position of electrode array dislocation is electrode array design specific.<br><br>
- Secondary Outcome Measures
Name Time Method <br>7. patients with deeply inserted electrode arrays do not have adequate stimulation in high frequency range of the basal cochlear turn. <br><br>8. patients following reimplantation have worse results in speech perception compared to first implanted patients. <br><br>9. there is no significant difference between elderly patients and younger CI recipients. <br><br>10. residual hearing detected in a kaplan meier curve depends on electrode array design in length and rigidity. <br>