The book “Cochlear Implantation and Children” (Prof. I. Korolylova – St. Petersburg; 2010)
In essence, a cochlear implant can be considered as a kind of aquatic apparatus. The difference is that it does not enhance the sound, but instead replaces the inner ear filament cells and the sound of the sound to the nerve is ensured at the expense of weak electronic ease.
During neurosensurgy, usually the snails are receptors, and the nerve fibers of the hearing are long maintained. This is based on the use of cochlear implant. It enables you to perceive high-frequency sounds that do not understand the low-quality idiot’s babies or even worse even when using a stronger apparatus.
The implantation operation is carried out with common drugs, the average duration is 1.5-2 hours. This is an operation at the ear and not on the brain, so it’s a surgeon-otolaryngologist. The receptor component of the implant is placed under the skin, it is bent on the bone. Its electrodes are included in lokkina (kokhlia).
In recent years, sophisticated surgical approaches are designed to prevent residual hearing on the implanted ear. This, in turn, in patients with low-frequency range, provides the perception of the sounds of natural sounds.
What is the implant?
Implant consists of two parts: external and implantable. Implantation belongs to the receiver and active electrodes. It does not change the replacement. The external parts are equipped with a microphone, and the speaker processor, which corresponds to the earpiece type earphone and transmitter antenna. The transmitter is attached to the implanted part of the magnet. Speech processor is the main and most difficult part. It’s a small, powerful computer. The intake of a cochlear implant provides a battery or a single element. The element usually works for several days.
Some of the inside of the implant are intended for use throughout life, however, replacement of external parts with a new, improved model is possible without any repeated surgical intervention.
The cochlear implant of different manufacturers is different from the number of electrodes, the sound processing strategy and other technical data. The number of electrodes in different models is from 8 to 24. Each electrode transmits information in a specified frequency range. As studies show, 8 channels are sufficiently enough for speech delivery.
How does a cowal implant work?
Originally, the sounds are perceived by the microphone.
After that it is transferred to speech speaker.
The processor transforms the sound into encoded signals that consist of consistent electronic impulses.
The coded signal will be transferred to the transmitter.
The transmitter sends a coded signal to the receiver placed in the form of radio signals through its skin.
The implanted receiver decodes the electron signal of the signal on the electrodes.
The weak electronic signals transmitted with electrodes help stimulate the hearing nerve. In response, the hearing nerve conveys nervous impulses to the brain, which perceives them as sounds and speech.
Do you need a cochlear implantation?
The issue of implantation is possible if the child has bilateral neurosensurgy and the threshold of hearing is more than 90 dB at 500-4000 hectares; The hearing threshold is more than 50 dB with the optimally selected earpieces, and the resolution of single words is 20%; There should be no contraindications to common drugs, and it is also important not to have mental mental and neurological disorders that will complicate the use of cochlear implant and rehabilitation of hearing and speech. Also, it is crucial to work with the surgeon and the parent after the operation. After individual examinations, the description of the symptomatic characterization, hearing, speech, thinking, parenting in medical studies should be taken into account. It is also important to evaluate the effectiveness of hearing prosthesis. It is also important for the child to keep a well-chosen and tuned hearing device for at least 3-6 months. There are more than 20 different surveys and consultations involved in the complete picture, which involves a sodhologist, audiologist, surgeon-otolaryngologist, radiologist, neurologist, psychiatrist, surdepentagogist, psychologist, pediatrician, anesthesiologist, physician diagnostic physician, allergologist and others.
Study can be divided into four groups:
Complex hearing of hearing – Define accurate quality of hearing, type, hearing nerve condition, effective hearing aids with the help of modern hearing aids.
The lokokinas are measured by the computed tomography to latch electrode in the locokin.
Sedopedagogical and psychological research determines the level of hearing, metatarsal, thinking, memory development, assesses the perspective of use of cochlear implant