The influence of cochlear morphology, insertion angle and depth, scalar location and position of the first electrode artifact after cochlear implantation on speech perception and hearing performance, with respect to different electrode arrays, as well as in comparison with reimplanted patients, patients with residual hearing, and age-related differences in patients below and above 70 years of age.

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00037881

Enrollment

2000

Registered

2026-01-13

Start date

2025-10-08

Completion date

Unknown

Last updated

2026-02-02

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

Conditions

Z96.2

Interventions

Group 1: We conducted a retrospective analysis of adult patients who underwent cochlear implantation between 2013 and 2024 at the Department of Otorhinolaryngology–Head and Neck Surgery, University Me

Eligibility

Sex/Gender

All

Age

12 Years to No maximum

Inclusion criteria

Inclusion criteria: Cochlear implantation performed within the defined study period (2013–2025) at the Department of Otorhinolaryngology–Head and Neck Surgery, Medical Center–University of Freiburg. Use of a multichannel cochlear implant electrode array from one of the following manufacturers: Cochlear™, MED-EL, or Advanced Bionics. Availability of complete clinical documentation, including surgical reports, intraoperative measurements, and follow-up records. Presence of intraoperative and/or postoperative assessment of electrode position, based on imaging modalities (DynaCT or digital volume tomography [DVT]) and/or intraoperative electrophysiological measurements (e.g., transimpedance matrix [TIM]).

Exclusion criteria

Exclusion criteria: Incomplete or missing clinical documentation, particularly absent surgical reports, intraoperative measurement data, or follow-up records. Missing or non-evaluable intraoperative and/or postoperative imaging, or imaging that did not allow reliable assessment of electrode position.

Design outcomes

Primary

Measure	Time frame
The aim of this study is to investigate how cochlear morphology, insertion angle and depth, scalar position, and the location of the first electrode artifact—considering different electrode array designs—affect speech perception and hearing outcomes following cochlear implantation. In addition, differences between primary implantations and reimplantations, patients with residual hearing, and age-related effects in patients younger and older than 70 years will be analyzed.	—

Measure

Time frame

The aim of this study is to investigate how cochlear morphology, insertion angle and depth, scalar position, and the location of the first electrode artifact—considering different electrode array designs—affect speech perception and hearing outcomes following cochlear implantation. In addition, differences between primary implantations and reimplantations, patients with residual hearing, and age-related effects in patients younger and older than 70 years will be analyzed.

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Countries

Germany

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 7, 2026