Auditory performance of children with cochlear ossification and partial implant insertion

Area of Science:

• Otolaryngology
• Neurosurgery
• Pediatric Audiology

Background:

• Profound deafness in children presents management challenges, especially with cochlear ossification.
• Cochlear ossification complicates the surgical insertion of electrode arrays for cochlear implants.
• Existing methods may be insufficient for profound hearing loss in ossified cochleae.

Purpose of the Study:

• To evaluate the feasibility and outcomes of partial cochlear implant insertion in children with completely ossified cochleae.
• To compare the performance of partially implanted cochlear devices with fully implanted devices in matched controls.
• To determine if the number of active electrodes significantly impacts cochlear implant efficacy in this population.

Main Methods:

• Surgical partial insertion of multichannel cochlear implants into the basal turn of ossified cochleae.
• Comparison of audiological test results between five partially implanted children and matched controls with full insertion.
• Follow-up assessment over a 6- to 18-month period.

Main Results:

• Partial insertion of multichannel cochlear implants into ossified cochleae was feasible.
• No significant performance differences were observed between partially and fully implanted groups on selected tests.
• Preliminary data suggest the number of active electrodes has a limited effect on outcomes.

Conclusions:

• Partial cochlear implant insertion is a viable surgical and rehabilitational alternative for children with complete cochlear ossification.
• Drilling the basal turn facilitates partial electrode array placement in ossified cochleae.
• This technique offers an acceptable option for cochlear implant prosthesis in challenging pediatric cases.