Which children benefit the most from a cochlear implant?
A cochlear implant may be an option for a child with severe to profound hearing loss who does not receive sufficient benefit from hearing aids. Hearing aids amplify sound, while a cochlear implant bypasses damaged sensory hair cells in the inner ear and electrically stimulates the auditory nerve. The auditory nerve carries these signals to the brain, which learns to interpret them as sound.
Children who experience difficulties developing listening, speech and language skills because of hearing loss may particularly benefit from early cochlear implant assessment. The potential benefits vary depending on the child’s hearing history, developmental needs and access to rehabilitation.
When should a child get a cochlear implant?
Some children may be eligible for cochlear implantation from around 9 months of age, depending on clinical circumstances, device approval criteria and the assessment team’s recommendations.
The first years of life are particularly important for auditory and language development. When a baby is diagnosed with significant hearing loss, parents and healthcare professionals should discuss appropriate interventions as early as possible.
Children who receive limited benefit from hearing aids should be referred for a comprehensive cochlear implant assessment without unnecessary delay. Older children may also benefit, including those who develop hearing loss after acquiring spoken language.
The decision to proceed with implantation depends on hearing test results, developmental assessments, medical suitability and the family’s understanding of the treatment and rehabilitation process.
Cochlear Implant Surgery for Children
Cochlear implant surgery in children is performed under general anaesthesia. The procedure is broadly similar to cochlear implant surgery in adults, although the surgical approach is adapted to the child’s anatomy and medical needs.
While the child is asleep under general anaesthesia:
- The surgeon makes an incision behind the ear and creates an opening in the mastoid bone to access the inner ear, taking care to protect the facial nerve.
- The electrode array is inserted into the cochlea.
- The internal receiver-stimulator is positioned beneath the skin and secured.
- The incision is closed, and the child is monitored during recovery.
The length of the hospital stay and the timing of discharge depend on the child’s recovery and the hospital’s clinical protocol.
After surgery, the child returns for follow-up appointments. The external sound processor is commonly fitted and activated after the surgical site has healed sufficiently, often around three to six weeks after surgery. The audiologist then adjusts the device settings and monitors the child’s responses to sound.
The procedure is generally well established but carries potential risks, including infection, dizziness, balance problems, tinnitus, changes in taste, facial nerve injury and device-related complications. There may also be a reduction or loss of remaining natural hearing in the implanted ear.
What type of hearing improvement can a child expect after a cochlear implant?
Children with cochlear implants may learn to recognize environmental sounds, distinguish voices, understand speech and in some cases, appreciate music. The degree of benefit varies considerably from one child to another.
Cochlear Implant Services at Nairobi ENT Clinic
Families in Nairobi and across Kenya who are concerned about a child’s hearing should seek assessment from a qualified ENT specialist and audiologist. Early identification of hearing loss can help families understand the available treatment options and make informed decisions.
Nairobi ENT Clinic can be contacted to enquire about available hearing assessments, cochlear implant evaluations and referral arrangements, depending on the services provided by the clinic.
A comprehensive cochlear implant programme may involve ENT specialists, audiologists, speech and language therapists and rehabilitation professionals working together to support the child before and after implantation.
Before proceeding, families should ask about the assessment process, eligibility criteria, surgical arrangements, device costs, programming appointments, rehabilitation services and long-term maintenance requirements.
Follow-up is essential for children’s cochlear implant success
Cochlear implant surgery is only one part of the treatment process. Consistent follow-up and rehabilitation are essential to help children learn to interpret sound and develop their communication skills.
The child’s family should work with a care team that coordinates surgical follow-up, audiology, rehabilitation and educational support.
A child with a cochlear implant may require ongoing care that includes:
- Regular audiology assessments: The audiologist checks the device, assesses hearing responses and adjusts the processor settings as the child develops.
- Auditory rehabilitation: Listening therapy helps children recognise, distinguish and interpret sounds.
- Speech and language therapy: Therapy supports communication and language development according to the child’s individual needs.
- Family-centred support: Parents and caregivers learn strategies to encourage communication and language development at home.
- Educational support: Teachers and other professionals may help provide appropriate classroom accommodations and communication strategies.
The frequency of appointments and therapy sessions depends on the child’s age, progress and individual needs. Families should follow the schedule recommended by their cochlear implant team.
Growing Up with a Cochlear Implant
Children with cochlear implants can participate in many everyday activities, including school, play and sports. Appropriate precautions help protect the external equipment and internal implant.
Parents and caregivers should take precautions related to:
- Water activities: Follow the manufacturer’s instructions for waterproof accessories and whether the external processor must be removed.
- Head injuries: Use suitable protective headgear during cycling and activities with a risk of impact to the head.
- Static electricity: Follow the manufacturer’s recommendations for protecting the device from static discharge.
- Meningitis and infections: Keep vaccinations up to date and seek prompt medical assessment when infection is suspected.
- Magnetic resonance imaging (MRI): Inform the healthcare team about the implant before any MRI scan because safety requirements depend on the specific device model.
- Device maintenance: Keep the processor in good condition and attend regular appointments for device checks and programming.
With appropriate follow-up, rehabilitation and family support, children with cochlear implants can continue developing their listening and communication abilities as they grow.
Prof. M. Macharia