Identification of hearing los and i...

Identification of hearing los and intervention within the first six month of life have been shown to impede adverse outcomes and facilitate language progress to maturity Adverse outcomes associated with congenital and acquired hearing los include dialect and language delay, poor academic performance, personal-social maladjustment, and emotional difficulties. The Committee upon Practice and Ambulatory Medicine, and the Section upon Otolaryngology and Bronchoesophagology of the American Academy of Pediatrics published a clinical report upon hearing assessment in infants and children to outline the risk indicators for hearing los provide guidance for assessing hearing los and encourage physicians to be knowledgeable about hearing referral resources in their communities.

While newborn and infant hearing screening lay opens most cases of congenital hearing los about cases may not become evident until the child is older Infants and children with high-risk indicators should be riddleed periodically for late-onset congenital hearing los and acquired hearing los (see the accompanying table). Any parental disturb should be addressed by a formal hearing evaluation.

upon physical examination, the following findings should alert the physician to investigate hearing loss: heterochromia of the irises; malformation of the auricle or ear canal; abnormal tympanic membrane; dimpling or skin tags around the auricle; chasm lip or palate; asymmetry or hypoplasia of the facial structures; microcephaly; and hypertelorism with abnormal pigmentation of the skin, hair, and estimates (Waardenburg syndrome). Children with repeated otitis media with effusion are at high risk of acquired hearing loss

If an objective tool is required for testing, it should be age appropriate. Automated auditory brainstem answer (ABR) is an electrophysiologic measurement of activity in auditory steadiness and brainstem pathways measured according to placing electrodes on the head to expose auditory stimuli from earphones in common ear at a time. It is a 15-minute proof that can be done in all ages moreover is best performed while the infant or child is asleep to avoid artifacts caused from motion. Evoked otoacoustic emissions (OAE) is a 10-minute ordeal that measures cochlear response using a small probe with a sensitive microphone in the ear canal for stimulus delivery and replication detection. It can be assessed in all ages whether the child is awake or asleep. ABR and OAE exhibition the auditory pathways, but they are not faithful tests of hearing. Condition-oriented replys and visual reinforced audiometry are behavior trials for children age nine month and above that measure the child's replys to speech and frequency-specific stimuli at handed through speakers. Unlike ABR and OAE, these experiments are not ear-specific. Children between the ages of brace and four years are generally trialed with play audiometry. Children older than four years are touchstoneed with conventional audiometry.

Physicians should be aware of the risk factors for hearing los and make appropriate arrangement for formal evaluation and referral to community resources, so as otolaryngologists, audiologists, and language pathologists.

Cunningham M Cox EO Hearing assessment in infants and children: recommendations beyond neonatal screening. Pediatrics February 2003;111:436-40

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