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Author: admin | 02.02.2014 | Category: Tinnitus Hearing Loss

In this article, the term hearing loss, used by itself, denotes any or all levels of severity of hearing difficulty. Most congenital and childhood onset hearing loss is included as sequel to various disease and injury causes already included in the Global Burden of Disease Study.
Those 192 million people with adult-onset loss (age 20 years and above) and 63 million people with childhood-onset loss make up almost 4.1 percent of the world's population and just over 40 percent of all people globally with hearing loss of any severity.
Hearing loss is grouped according to International Classification of Diseases and Related Health Problems, 10th revision, version for 2003 (ICD-10) into conductive and Sensorineural loss and other hearing loss, ICD-10 codes 90-91(WHO 2003).
Chronic otitis media (COM) includes chronic suppurative otitis media and otitis media with effusion. Conductive hearing loss is caused by anything that interferes with the transmission of sound from the outer to the inner ear. Sensorineural hearing loss is due to damage to the pathway that sound impulses take from the hair cells of the inner ear to the auditory nerve and the brain. If a pregnant woman gets rubella, the baby is at risk of being born with profound deafness (among other possible birth abnormalities). Of the estimated 500 million deaf and hard-of-hearing people, 23.4% report that their loss is due to some sort of noise. Another 28% report that their loss is due to age, while 12.2% report that it is due to infection or injury. Hearing loss and deafness are serious disabilities that can impose a heavy social and economic burden on individuals, families, communities and countries. Chapter 50, Loss of vision and hearing, Nature, Causes, and Epidemiology of Hearing Loss, Disease control priority project. Colin Mathers, Andrew Smith, Marisol Concha, Global burden of Hearing loss in the year 2002, World Health Organization, Geneva. Bridget Shield, Evaluation of the social and economic costs of hearing impairment, a report for hear-it, October 2006. The Cochlear™ professionals site is a specialised resource centre for hearing health and other professionals. Ticking 'Remember my selection' will make sure you are returned to this country website again the next time you visit. The term sensorineural hearing loss describes two different problems: sensory loss involving the inner ear and neural loss involving the hearing nerve. It’s another reason why hearing loss should be treated promptly - the ‘downstream’ neural parts of the hearing system need input from the ‘upstream’ sensory parts in order to grow and stay healthy. The causes of sensorineural hearing loss are varied but can be generally put into two categories: congenital and acquired. Congenital hearing loss is present at birth and is the most common problem seen in newborn babies. Acquired hearing loss, which happens after birth, can be caused by a wide range of factors.

When present in both ears, sensorineural hearing loss will mean you may have difficulty understanding, even when speech seems loud enough.
Treatment for sensorineural hearing loss varies, depending on the severity of your hearing loss and whether you are affected in one ear or both. Hearing aids can help most people with mild to moderate sensorineural hearing loss in both ears. If you have severe to profound hearing loss and hearing aids are no longer working for you, you may want to learn more about cochlear implants. If you have mild to severe sensorineural hearing loss in one ear then a conventional hearing aid is the most common treatment option. In profound losses, Baha® bone conduction implants can transmit sound through bone, from the damaged ear to the working inner ear on the other side. Please seek advice from your medical practitioner or health professional about treatments for hearing loss.
The smallest of these bones, the stapes, fits into the oval window between the middle and the inner ear. When the oval window vibrates, fluid in the inner ear transmits these vibrations to a delicate snail shape structure called the cochlea.
The bending of hair cells in the cochlea sets off nerve impulses, which pass through the auditory nerve to the hearing center of the brain.
Examples include otitis media, meningitis, rubella, congenital anomalies and non-syndromal inherited hearing loss2.
Numbers with childhood-onset hearing loss by cause have so far not been estimated separately but are included among sequel of other diseases (for example, infectious diseases such as meningitis, otitis media, congenital conditions). These forms of otitis media, together with some other middle ear diseases, such as perforation of the tympanic membrane, cholesteatoma, and otosclerosis, are the major causes of conductive hearing loss1. This is one reason why vaccination against rubella, available in the UK as the MMR (measles, mumps and rubella) vaccine, is so important. Children with hearing impairment often experience delayed development of speech, language and cognitive skills, which may result in slow learning and difficulty progressing in school. Whether you would like to know the latest news and events or need to access to the latest professional and consumer product information - you will find it here. You should visit your Cochlear country website for the most accurate information specific to your location. We now know that in most cases the problem stems from the inner ear rather than from the hearing nerve. These include trauma, presbycusis (age-related hearing loss), noise exposure from machinery or firearms, Meniere’s disease and meningitis.
A cochlear implant is an electronic device that is surgically implanted - so it bypasses the damaged inner part of the ear to stimulate the hearing nerve directly.
However, as hearing aids require some degree of useable hearing, they can’t help in the case of profound hearing loss.

This makes it easier to understand speech in noisy situations and reduces the attenuation of sounds from the deaf side. When sound waves hit the eardrum, the impact creates vibration, which in turn causes three bones in the middle ear to move. Cytomegalovirus is a common and relatively harmless virus in healthy adults, but if a woman gets exposed to it for the first time while pregnant, it can cause significant hearing loss in the unborn child.
According to WHO, There are 255 million (4.25%) deaf people out of total 6 billion (Census, IDB) world population.
Persons 50 years and older are eight times more likely to have hearing impairment than persons ages 16-35 (Figure-2, Figure-3). While males at all ages are more likely than females to be deaf or hard-of-hearing, the gap widens after age 18 (Figure-4, (Source: National Academy of Aging Society). According to WHO, There are 255 million (4.25%) deaf people out of total 6 billion (Census, IDB) world population. In adults, hearing impairment and deafness often make it difficult to obtain, perform, and keep employment.
This area will help you get the most out of your Baha System.Excel at schoolHow Cochlear can help support your child in and out of the classroom.New!
However, we continue to group the two problems together, because the inner ear and the hearing nerve are connected and need to work together. Before the development of a vaccine, maternal rubella or German Measles was a common cause of congenital hearing loss.
Ototoxic drugs - which damage the ear but may be necessary to treat some life-threatening medical conditions – can also trigger hearing loss. Unlike hearing aids which simply amplify sound, cochlear implants convert sound waves to electrical impulses in a way that mimics your natural hearing. If you have normal hearing or mild hearing loss in your good ear, a bone conduction implant may be a good option for you.
All products should be used only as directed by your medical practitioner or health professional.
Its big challenge to our society is to help and support the deaf people who are unable to afford and are uncapable to take of own health. Amplifying sounds through hearing aids makes them sound louder, but not necessarily clearer.

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