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Intellectual Disability Hearing Loss

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Intellectual Disability Hearing Loss Powered By Docstoc
					Audiology and the Downs
  Syndrome Population




       Fiona Fitzgerald
     Audiological Scientist
       OLCHC Crumlin
                   Content

   Overview of the hearing system
   Audiological Assessments in babies and
    children
   Audiological features of the Downs
    Syndrome population
   Glue Ear and its management
   Hearing and Rehabilitation services for the
    hearing impaired
Anatomy and Physiology of the Ear
Normal

Mild

Moderate



Severe

Profound
Types of Hearing Loss
Conductive vs Sensorineural
Otoscopy
       Wax blockages

       Red Ear Drum

       Obvious middle ear
        fluid

       Discharging Ear

       Perforated Ear Drum
                 Tympanometry




   Middle Ear Function
       Normal
       Eustachian Tube Dysfunction
       Middle Ear Fluid
       Perforation
       Grommet Status
Babies are tested using Auditory
Brainstem Response testing (ABR)
Toddlers are tested using Visual
Reinforcement Audiometry (VRA)
Young children are tested using
  Play Audiometry (Play PTA)
     Audiological Features in T21
   Outer ear is low
    set/small/rotated
    backwards/folded

   Narrow Ear Canals +
    Eustachian Tubes

   Middle ear structural
    abnormalities

   Smaller cochlear length
    Incidence of Hearing Loss in T21
   Study cite 40-80% with hearing loss

   80% Conductive Hearing Loss

   4-7% Sensorineural Hearing loss

   4.5% Unilateral Sensorineural Hearing loss

   Sensorineural hearing loss can also develop in
    late teenage years in as many as ⅓ of T21
    population
                 “Glue Ear”
   Build-up of viscous fluid behind eardrum
   70% of children will have Glue Ear before
    their 3rd birthday
   Many Causes
          Colds
          Teething

          Eustachian Tube Dysfunction

          Adenoids/Tonsil problems

          Syndromes

          Cleft palates
Glue Ear
             Glue Ear in T21

   50-80% suffer from Glue Ear/Ear
    Infections

   17 times more likely to undergo grommet
    insertion

   More than 50% of these cases require
    more than one set of grommets
             Glue Ear in T21

   Chronic middle ear problems thought to
    be due to combination of physical defects


     Dysfunctionaleustachian tube
     Small nasopharynx

     Poor immune system
        Symptoms of Glue Ear
   Fluctuating Hearing Loss
   Pulling at ears
   Poor localisation of voices
   Language delay/behavioural consequences



       Treatment for Glue Ear
   Wait and See for mild cases over winter
   Grommets
   Hearing Aids
      Services for Children with
        Hearing Impairment
   Childrens Hospitals
   Community audiology clinics
   ENT clinics
   DeafHear
   Speech and language services
   Cochlear Implant Centre at Beaumont
   Visiting Teacher of the Deaf
   Private Audiology Practices
Questions?

				
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posted:7/28/2011
language:English
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