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Neurosensory relative deafness (cochlear neuritis)
February 8, 2012
The neurosensory relative deafness, as known as neuritis of an acoustical nerve, represents one of the most widespread diseases of the hearing aid. This disease (or a deviation) — defeat of structures of an inner ear that involves a partial, or absolute hearing loss. Relative deafness by disturbances of voloskovy cells of spiral body in a snail of an inner ear is caused.
The main symptoms of neurosensory relative deafness it is a hearing loss, any rumble or continuous noise in an ear which frequency can be both low, and high can often be heard.
Reasons of neurosensory relative deafness
It can develop for several reasons. Basic reasons of neurosensory relative deafness nevertheless are any deviations in the hearing aid which can be both damages from adverse external effects, and unpleasant effects of diseases.
The first reason — infectious diseases at which display any complications even after full treatment from an illness are possible. It complications from parotitis, syphilis, and catarrhal infectious diseases such as quinsy, or flu.
The second reason — frustration in vessels, a hypertension, or any other deviations which influence blood circulation in an organism in general, and intake of blood to certain places in particular.
The third reason — the deviations caused by external irritants. They are shown as result of listening of music at a high loudness, a stress, or acoustic shock. Acoustic shock, in turn, can arise in case of manifestation of too loud sound near an auricle. As the possible reason also continuous vibration can serve in that place, where to be the person. Though the reasons of neurosensory relative deafness can be absolutely different, described above are among them the most frequent.
The fourth reason — reaction of an organism to drugs which are accepted. The matter is that some drugs can be contraindicated because of an allergy to them, or the content in them of the substances prohibited for acceptance. It can be antibiotics, or a number of drugs which are intended for patients with infectious diseases (malaria, flu, a SARS), or diuretic drugs.
Forms of neurosensory relative deafness
There are three forms of neurosensory relative deafness. The first — easy if the person hears sounds which frequency on 50 decibels exceeds norm (the speech can happen at distance in 5 meters).
The second form — moderately severe, frequency exceeds norm on 60 decibels (the person hears the speech at distance in 4 meters).
The third form — heavy, the frequency of the heard sounds exceeds norm on 70 decibels (at the same time conversation can happen at the distance which is not exceeding 1 meter).
Diagnosis of neurosensory relative deafness
Diagnosis of neurosensory relative deafness has to is carried out directly by the otorhinolaryngologist (ENT SPECIALIST). As a rule, externally symptoms of neurosensory relative deafness are not shown in any way therefore necessary procedure is carrying out kamertonalny tests the ENT SPECIALIST by the doctor.
If there is a suspicion on relative deafness existence, the tone threshold audiometriya (check by means of the equipment) which will give more than exact idea of existence of an illness, and its possible development is carried out.
Depending on a form of neurosensory relative deafness, research, and further hospitalization is conducted. If in time perhaps further course of a disease does not see a doctor, up to total loss of hearing.
Treatment of neurosensory relative deafness
Treatment of neurosensory relative deafness is carried out as follows. If there is though the slightest sign of existence of relative deafness, it is necessary to bring the patient to hospital where it will be placed in a hospital immediately. In an effect the dropper, drugs which improve blood circulation, supply of blood in a brain, recession of hypostases (drugs of hormonal character), and regulation of a metabolism in nervous tissues is put. The patient needs also to accept vitamins of group B in large numbers.
After the end of hospitalization the patient has to use such drugs which make positive impact on an inner ear in the preventive purposes. Treatment, and the accepted drugs is appointed depending on what reasons of neurosensory relative deafness, and at what stage to be an illness.
Also carrying out implantation of electrodes in an auricle with the purpose to stimulate ear nerves is not excluded. It will help to recover hearing not only at those at whom relative deafness developed to an initial stage, but also at those who suffer from a severe form of an illness. Also cochlear implantation which helps not simply to hear better is not excluded, but also can recover hearing at almost completely deaf people. Despite it, also use of hearing aids practices if to carry out cochlear implantation still early.
Prevention and complications of neurosensory relative deafness
Prevention of neurosensory relative deafness implies careful attitude to the hearing. That is avoiding of loud sounds, noise, or works in the place where the frequency of the made noise is much higher than norm. It is not recommended to listen loudly to music, both in earphones, and via the player. Cases when as the reason of relative deafness served regular visits of night clubs where, as we know, the level of the made noise exceeds admissible norm on several tens decibels are known.
Careful attitude to the hearing will be important aspect also. If the person works in the place where loud noise is inevitable, it is recommended to use special sound-absorbing earphones. It is recommended to those who works at manufacturing enterprises, buildings, night clubs, shooting galleries. Otherwise the probability not only deteriorations in hearing is high, but also the fact that complications of neurosensory relative deafness will be shown.
As well as in a case with any other illness, at relative deafness complications are possible. As it is not a viral illness, does not possess secondary complications. However if not to attach significance to a partial hearing loss, and in time not to see a doctor, progress of an illness is inevitable, as well as deafness. Complications of neurosensory relative deafness have only one character — continuous deterioration in hearing.
As one of possible options, is sudden neurosensory relative deafness. It is expressed in a partial, or full hearing loss within a day. Sudden relative deafness can appear as result of allergic reactions, or disturbances in blood supply.
It should be noted also that efficiency of treatment of relative deafness directly depends on what clinical form of a disease, what development term at it, and afterwards it could appear. As the reasons of neurosensory relative deafness absolutely different, its development can also proceed with various speed. If the ear disease, such as otitis served as the reason, relative deafness develops only on one ear, further its deterioration takes place not too quickly. If relative deafness developed as a result of continuous stay in the place with big noise level, the probability of a course of a disease both on left, and on the right ear is high and if not to pay attention to it, writing off everything for fatigue, the illness will progress with the terrifying speed.
If the illness proceeds within three-four weeks, the advantage of treatment will make 80-90%. In case of the request for medical care a little later than the put term, and the illness had an opportunity to develop from one to three months, treatment will give a positive effect with probability from 35 to 60%. If the illness was started, and developed within several months, usually treatment will not yield almost any results owing to what carrying out operation on implantation of electrodes, or cochlear implantation for the purpose of recovery of hearing will be the only possible exit.
Section: Diseases of an ear throat-nose