Cochlear implant can help people with severe or very severe deafness communicate with people better through hearing, so that they can get more education and employment opportunities, and make them return to the mainstream society. Although cochlear implant has brought new hope to patients with severe and very severe deafness, it does not mean that all patients can implant cochlear implant, and the cochlear implant should also have a correct understanding and appropriate expectations.
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1) limitations of cochlear implant
We should not only know that cochlear implant brings joy to many deaf people’s lives, but also understand its limitations:
First, the cochlear implant can not repair the damaged hearing system. The damaged auditory nerve fibers can not be repaired or replaced in medicine. If only a small amount of auditory nerve fibers remain, it will not be able to transmit enough information to the brain to understand such complex sounds as language. Secondly, although the cochlear implant is helpful to the deaf, it is not perfect, far from reaching the normal hearing ability, which needs to be fully recognized. Therefore, when considering cochlear implant, deaf patients should first determine whether they are qualified candidates for cochlear implant.
Not all patients with very severe deafness or ineffective hearing aids are suitable for cochlear implant. The factors that affect the implant effect are: the length of deafness time, the age of deafness, the cause of deafness, the condition of inner ear nerve fiber, the imaging condition of inner ear, etc. In addition, the patient’s desire to regain hearing, family financial support and many other factors may affect the effect of cochlear implant.
2) standards of cochlear implant
Implant < a href = "http://www.sqhearing.com/tlkp/535.html" target = "blank" > cochlear implant < / a >, with the same and different selection criteria for adults and children.
The same criteria are: the degree of deafness of both ears is severe or extremely severe sensorineural deafness; hearing aids and other devices are unable to improve the hearing situation; patients have strong desire to improve hearing and better psychological quality; have the support of family and friends, correct understanding and appropriate expectations of cochlear implant; no surgical contraindications, etc.
Different selection criteria are as follows: adults must be post lingual deafness patients with positive electrical stimulation of promontory, but there is no definite age limit. Young people, middle-aged people and the elderly can be implanted as long as they are post lingual deafness and meet the requirements of surgical anesthesia; for children, the youngest one can be implanted in 12 months (FDA approved), and in some special cases, the hand can be implanted The age of the operation can be a few months earlier. The results of operation before 8 years old are better, especially before 4 years old. If the patients can wear hearing aids for 3-6 months before operation and carry out hearing rehabilitation training, it will be very helpful for the improvement of speech ability after operation.
3) risk of cochlear implant
To implant cochlear implant, we need a complete set of hearing rehabilitation education plan, and parents also need financial and material resources. In addition, children should also exclude some diseases that are not suitable for surgery, such as incomplete or absent bilateral auditory nerve, nerve damage caused by auditory nerve block, obvious mental retardation, and the risk rate of implantation exceeding the benefits.
In addition, there are some factors that affect the choice of patients, such as degenerative neuropathy, cerebrovascular disease patients are not suitable for cochlear implant. There are also risks in cochlear implant surgery, such as facial paralysis. In a word, cochlear implant also has requirements and selection criteria for patients. Do not think that as long as patients with extremely severe deafness and ineffective hearing aids can choose cochlear implant.
Up to now, people can not accurately predict the effect of cochlear implant. Because there are many factors that affect the effect of cochlear implant, it is a long and slow process for some people, while for others, it only takes a few weeks to achieve good results, such as sudden loss of hearing due to pathological changes, cochlear implant in a very short time.
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Link：Correct understanding of cochlear implant
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