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Frequency of electrode migration after cochlear implantation in the early postoperative period. What are associated risk factors?
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  • Xueying Goh,
  • Laura Harvey,
  • Patrick Axon,
  • Neil Donnelly,
  • James Tysome,
  • Daniele Borsetto,
  • Matthew Smith,
  • Manohar Bance
Xueying Goh
Addenbrooke's Hospital

Corresponding Author:[email protected]

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Laura Harvey
University of Cambridge
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Patrick Axon
Addenbrooke's Hospital
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Neil Donnelly
Addenbrooke's Hospital
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James Tysome
Addenbrooke's Hospital
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Daniele Borsetto
Addenbrooke's Hospital
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Matthew Smith
Addenbrooke's Hospital
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Manohar Bance
Addenbrooke's Hospital
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Objectives: To investigate the prevalence and risks factors associated with electrode migration in cochlear implant (CI) recipients. Design: Retrospective cohort study of all CIs performed between 1 January 2018-1 August 2021 in a single tertiary adult and paediatric cochlear implant centre in the UK. Main outcome measures: The primary aim is to determine the prevalence of electrode migration, based on comparing intraoperative surgeon report and results of a routine plain X-ray performed 2 weeks after surgery. Electrode migration is defined as the detection of movement of 2 or more electrodes out of the cochlea from time of surgery. Multivariate analysis was performed to investigate risk factors including preoperative factors and intraoperative factors that might predispose to migration. Results: 465 patients, having 516 distinct surgery sessions, with 628 implants were analyzed. Electrode migration occurred in 11.5% of all implants. Pre-existing cochlear abnormality was an independent associated risk factor for electrode migration (OR:3.40<1.20-9.62> p=0.021). Demographics, surgical technique, usage of a precurved electrode, CSF leak, surgeon seniority and intraoperative telemetry did not influence risk of migration. There were 5 implants which migrated later than 2 weeks, median: 263days, for which head injury was a common precipitating factor. There was some difference between different lateral wall electrodes Conclusion: Electrode migration in the early postoperative period is a common occurrence and is more likely in implant recipients with obstructed or malformed cochleae. Keywords : Cochlear implants, Electrode migration, Risk factors, Cochlear abnormalities, Postoperative X-ray
01 Nov 2022Submitted to Clinical Otolaryngology
15 Nov 2022Submission Checks Completed
15 Nov 2022Assigned to Editor
11 Dec 2022Reviewer(s) Assigned
25 Jan 2023Review(s) Completed, Editorial Evaluation Pending
09 Feb 2023Editorial Decision: Revise Minor
10 Feb 20231st Revision Received
11 Feb 2023Submission Checks Completed
11 Feb 2023Assigned to Editor
11 Feb 2023Reviewer(s) Assigned
16 Mar 2023Review(s) Completed, Editorial Evaluation Pending
22 Mar 2023Editorial Decision: Accept