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Cochlear implant reimplantation

R T Miyamoto¹, M A Svirsky, W A Myres

¹Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis 46202, USA.

The American Journal of Otology

|December 10, 1997

Summary

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Cochlear implant reimplantation is possible, but the first surgery offers the best surgical conditions. While most patients maintain insertion length and active channels, some experience decreases, with a slight overall drop observed.

Area of Science:

Otolaryngology
Neurosurgery
Biomedical Engineering

Background:

Cochlear implantation is a complex procedure requiring precise device placement.
Device revision or reimplantation may be necessary due to various factors.
Understanding the impact of reimplantation on device parameters is crucial for patient outcomes.

Purpose of the Study:

To evaluate changes in cochlear implant insertion length and active channel count after reimplantation.
To compare device parameters between initial implantation and subsequent reimplantation surgeries.

Main Methods:

Retrospective case review of 170 consecutively implanted cochlear devices.
Analysis of data from 17 patients who underwent reimplantation in the same ear.
Focus on Nucleus cochlear implant users.

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Main Results:

Insertion length and number of active channels generally remained consistent post-reimplantation.
A few subjects experienced significant reductions in these parameters.
A small, statistically significant decrease in both insertion length and active channels was observed across the entire group.

Conclusions:

Cochlear implant reimplantation is technically feasible.
The initial implantation surgery typically provides the optimal surgical environment for device placement.
Subsequent reimplantations may lead to minor compromises in device parameters.