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

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 - CMR

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00019807

Enrollment

1000

Registered

2021-11-25

Start date

2016-11-01

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

H90

Interventions

Group 1: patients following CI surgery will be compared regarding scalar position of the electrode array, morphological radiological criteria and postoperative speech perception.

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

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

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.

Design outcomes

Primary

Measure	Time frame
1. Scalar position depends on cochlear size. 2. scala tympani inserted electrode arrays show better results in postoperative speech perception. 3. position of electrode array dislocation is electrode array design specific.	—

Secondary

Measure	Time frame
7. patients with deeply inserted electrode arrays do not have adequate stimulation in high frequency range of the basal cochlear turn. 8. patients following reimplantation have worse results in speech perception compared to first implanted patients. 9. there is no significant difference between elderly patients and younger CI recipients. 10. residual hearing detected in a kaplan meier curve depends on electrode array design in length and rigidity.	—

Measure

Time frame

7. patients with deeply inserted electrode arrays do not have adequate stimulation in high frequency range of the basal cochlear turn. 8. patients following reimplantation have worse results in speech perception compared to first implanted patients. 9. there is no significant difference between elderly patients and younger CI recipients. 10. residual hearing detected in a kaplan meier curve depends on electrode array design in length and rigidity.

—

Countries

Germany

Contacts

Public ContactManuel Christoph Ketterer

Klinik für Hals- Nasen- Ohrenheilkunde

manuel.christoph.ketterer@uniklinik-freiburg.de0049076127041010

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026