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Electrode array extrusion through the posterior canal wall presenting as a delayed post-cochlear implant
Cochlear Implants International
|April 2, 2015
Summary
A rare cochlear implant complication, electrode array extrusion through the posterior ear canal wall, occurred in a child. Surgeons must consider bone thinning and implant placement to prevent this issue.
Area of Science:
- Otolaryngology
- Neurosurgery
- Biomedical Engineering
Background:
- Cochlear implantation is a safe and effective procedure for hearing restoration.
- Electrode array extrusion is a rare but serious complication.
- Extrusion through the tympanic membrane has been reported, but not through an intact posterior canal wall.
Observation:
- A 13-year-old boy experienced delayed extrusion of his cochlear implant electrode array through the posterior ear canal wall.
- The posterior canal wall was initially intact, making this a unique presentation.
Findings:
- Excessive thinning of the bony posterior canal wall can lead to breakdown.
- Coiling of the electrode array in the mastoid cavity can exert pressure on the canal wall.
- Surgeons must be aware of pediatric mastoid growth patterns.
Implications:
- Preventing bony wall thinning and managing electrode array placement are crucial for avoiding extrusion.
- Regular, lifelong follow-up of cochlear implant patients is essential for early detection of complications.
- This case highlights the need for careful surgical technique and patient monitoring.
Keywords:
Cochlear implantElectrode array extrusionMastoid growth patternsPost-operative complication
