Cochlear implant parts

Cochlear implant parts

 

Cochlear Implant Parts

Parts of a Cochlear Implant​​​​​

All cochlear implants, regardless of manufacturer, consist of two general components:

. Internal device: The internal portion of the implant consists of two parts: the receiver/stimulator and the intracochlear electrode array.

. External hardware: The external portion consists of three parts: a microphone, a speech processor, and a transmitting coil.

 

 

Read more about : Cochlear implant pros and cons

 

 

How a Cochlear Implant Works

. Sound is picked up by the microphone, where it is sent down a cord to the speech processor.

. The speech processor filters the incoming acoustic signal into separate frequency bands, and then converts this information into digital form.

. The digitized signal is sent back up the cord to the transmitting coil, which is held in place by a magnet.

. The coil transmits the digitized information across the skin to the internal receiver/stimulator.

. The internal receiver/stimulator decodes the incoming signal and sends information in each frequency band to a different electrode within the cochlea. (The internal receiver/stimulator also contains a magnet to which the external coil sticks.)

. High-frequency information is sent to electrodes in the basal end of the cochlea, and low-frequency information is sent to electrodes in the apical end of the cochlea.

. Electrical stimulation from the intracochlear electrodes takes the place of damaged cochlear structures or hai​r cell - nerve synapses.

. The auditory nerve picks up the electrical signals from the electrodes and relays that information to the brain where it is interpreted as sound.

 

 

What does cochlear implant surgery entail?

If your doctors decide you could benefit from a cochlear implant, they’ll explain what it entails and schedule the surgery.

Here’s what usually happens:

. Before the surgery, you’re given general anesthesia to make you sleep.

. Once you’re asleep, your surgeon creates an incision behind your ear and makes a slight indentation in the mastoid bone.

. Your surgeon makes a tiny hole in the cochlea. They then insert the electrodes through the hole.

. Next, they insert the receiver behind your ear, beneath the skin. They secure it to the skull and stitch the incision.

. Once the surgery is complete, you’ll be moved to the recovery unit, where you wake up. You’ll be closely monitored to make sure you don’t have any side effects from the surgery.

. You’ll typically be discharged a few hours after the surgery or the next day.

Before you leave the hospital, a healthcare professional will show you how to care for the incision.

You’ll have a follow-up appointment about a week later, so your surgeon can check the incision and see how it’s healing. The incision needs to heal before the implant is activated.

 

10 common questions about cochlear implant parts

1How do cochlear implants work?
Hearing aids amplify sounds so they may be detected by damaged ears. Cochlear implants bypass damaged portions of the ear and directly stimulate the auditory nerve. Signals generated by the implant are sent by way of the auditory nerve to the brain, which recognizes the signals as sound.
2Who invented cochlear implants?
André Djourno and Charles Eyriès invented the original cochlear implant in 1957. This original design distributed stimulation using a single channel. Two years later they went their separate ways due to personal and professional differences. William House also invented a cochlear implant in 1961
3What is the success rate of a cochlear implant?
A 10-year retrospective analysis of 57 patients showed that the CI malfunctioned in just 4 cases (7 percent). Other studies have found similar results. If implant failure has the highest rate at less than 10 percent of all surgeries, you can assume that your chances for a successful cochlear implant are pretty high
4Can you hear normally with a cochlear implant?
The implant doesn't make you hear normally again, but it can help you with sounds. Most people with severe to profound hearing loss can understand speech in person or over the phone better than they did with a hearing aid. It can usually help you know sounds around you, including telephones, doorbells, and alarms
5How long do cochlear implants last?
For the majority of patients, the sound quality will continually improve over the first six to twelve months. The cochlear implant is a lifelong commitment
6When was the first successful cochlear implant?
October 1982 Thirty years ago in October 1982, Melbourne man Graham Carrick made history when a remarkable invention, implanted in his cochlea, was 'switched on' – and 15 minutes later he could hear for the first time in 17 years.
7Do cochlear implants need batteries?
Silver-oxide and alkaline batteries also work with cochlear implants. ... These batteries don't need air to work and can be recharged multiple times. Current rechargeable 675 batteries will last approximately 6—8 hours per charge, again depending on your processor and battery pack
8How many cochlear implants are in the world?
The number of people who use cochlear implants keeps growing. More than 324,200 people across the world have cochlear implants. In the United States, over 96,000 people have cochlear implants (Source: National Institutes on Deafness and Other Communication Disorders, 2017).
9Is there an age limit for cochlear implants?
The patients were divided into 2 groups (those less than 70 years of age and those at least 70 years of age), and the results were also compared to those of younger adult cochlear implant recipients (less than 60 years of age). ... The mean age at implantation was 68 years (range, 60 to 82 years).
10Is cochlear implant surgery painful?
Your Recovery A cochlear implant is a small electronic device that can help you hear if you have severe or total hearing loss. Your doctor made a cut, called an incision, behind your ear. ... You may have mild to moderate pain in and around your ear and have a headache for a few days.

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