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Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation
Published on: August 4, 2023
Revision cochlear implantation with different electrodes can cause incomplete electrode insertion and poor
Seung-Ho Shin1, Sera Park, Won Sang Lee
1Department of Otolaryngology-Head and Neck Surgery, CHA University, Seongnam, Republic of Korea.
Summary
Revision cochlear implantation (CI) using the same electrode type ensures full insertion. Using different electrodes increases the risk of incomplete insertion and potential speech performance decline.
Area of Science:
- Otolaryngology
- Neurosurgery
- Biomedical Engineering
Background:
- Revision cochlear implantation (CI) is an uncommon but necessary procedure.
- Factors influencing outcomes in revision CI, particularly electrode insertion, require further investigation.
Purpose of the Study:
- To review experiences with revision CI.
- To assess the efficacy of revision CI.
- To identify factors contributing to incomplete electrode insertion during revision CI.
Main Methods:
- Retrospective chart review of 22 patients undergoing revision CI between 2004 and 2011.
- Analysis of explanted and newly implanted electrode types.
- Measurement of electrode insertion depth and assessment of postoperative speech perception.
Main Results:
- 2.7% of CI recipients required revision surgery, primarily due to device failure.
- Full electrode insertion was achieved in all cases using the same or similar electrode type.
- Incomplete electrode insertion occurred in 4 of 5 patients who received a different electrode type during revision.
Conclusions:
- Electrode selection is critical in revision CI to ensure full insertion.
- Using a different electrode type during revision CI is associated with a higher risk of incomplete insertion.
- While not always impacting speech performance, incomplete insertion can lead to poorer outcomes; thinner electrodes may mitigate this risk.