Cochlear implantation in ossified cochlea-Merf experience

Area of Science:

• Otolaryngology
• Neurosurgery
• Medical Imaging

Background:

• Labyrinthitis ossificans is a pathological condition resulting from meningitis.
• It leads to the ossification of the cochlea, which can be partial or complete.
• This condition presents challenges for auditory rehabilitation.

Purpose of the Study:

• To evaluate the efficacy of cochlear implantation in patients with labyrinthitis ossificans.
• To compare auditory outcomes between partial and complete electrode array insertions in these patients.

Main Methods:

• A retrospective analysis of four patients with labyrinthitis ossificans who underwent cochlear implantation.
• Two patients received double array insertion, and two received partial insertion of straight array electrodes.
• Auditory benefit was assessed and compared between the groups.

Main Results:

• Despite partial insertion of electrodes in two patients, no significant difference in auditory benefit was observed compared to those with complete insertion.
• Both partial and complete insertions yielded comparable outcomes in this cohort.
• The surgical approach was adapted based on the degree of ossification.

Conclusions:

• Cochlear implantation can be effective in patients with labyrinthitis ossificans, even with challenges posed by ossification.
• Partial electrode insertion may provide similar auditory benefits to complete insertion in select cases.
• Surgical technique should be individualized to optimize outcomes in the presence of cochlear ossification.