Cochlear implant (CI) candidacy increasingly includes patients with residual hearing, making atraumatic electrode insertion essential. Motorized insertion tools (MITs) aim to standardize electrode insertion and reduce mechanical stress, but their effects compared with manual insertion remain insufficiently understood....
Cochlear implant surgeons should monitor how insertion method (motorized vs. manual) affects post-operative impedance trajectories, particularly in hearing-preservation candidates, though definitive practice change awaits larger controlled trials.
Electrode insertion technique may influence inner-ear trauma and long-term cochlear implant performance, with direct implications for hearing-preservation outcomes in residual-hearing candidates.
- 01Study compared motorized vs. manual cochlear implant electrode insertion techniques.
- 02Temporal impedance changes were tracked as a proxy for post-insertion cochlear trauma and fibrosis.
- 03Focus was on atraumatic insertion in candidates with residual hearing.
- 04Impedance trends over time reflect changes in the cochlear environment around electrodes.
- 05Findings could inform surgeon technique selection for hearing-preservation surgery.
Motorized cochlear implant electrode insertion produces a different temporal impedance profile compared to manual insertion.
studypartially supportedAtraumatic insertion technique is important for preserving residual hearing in cochlear implant candidates.
studysupported- PMID
- 42173067
- DOI
- 10.1016/j.heares.2026.109653.
- Journal
- Hearing Research
- Publication type
- research_article
- Evidence level
- 2b
- Population
- Cochlear implant recipients with residual hearing undergoing atraumatic electrode insertion
- Intervention
- Motorized cochlear implant electrode insertion
- Comparator
- Manual cochlear implant electrode insertion
Primary outcomes
Temporal evolution of electrode impedance post-implantation