HIS 125 Disorders of the Outer Ear Overview

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HIS 125 Disorders of the Outer Ear Overview

  1. 1. Disorders of the Outer EarDuring otoscopy, there many visualabnormalities which may be revealed.For now, we will review some of themore common conditions.
  2. 2. Disorders of the Outer Ear  AtresiaMost atresia is congenital in natureand associated with varioussyndromes.Atresia is a malformation of the pinnaor external auditory meatus.
  3. 3. Disorders of the Outer Ear  Otic Atresia This is a common form of atresiawhere the ear canal is not formed.However, all the components of themiddle ear are completely formed.This may occur for one or both ears.
  4. 4. Disorders of the Outer Ear  Atresia A couple of common syndromes associated with congenital atresia are:1. Treacher Collins syndrome2. CHARGE syndrome
  5. 5. Disorders of the Outer Ear  Stenosis Is a narrowing of the ear canal. It isnot commonly associated with anyhearing loss or syndrome. A stenotic ear canal condition mayresult in excessive cerumenaccumulation and challenges tohearing instrument fittings.
  6. 6. Disorders of the Outer Ear  External Otitis This condition is most commonlyfound within our patient/clientpopulation. It is sometimes known as“swimmers ear”.
  7. 7. Disorders of the Outer Ear  External OtitisAcute cases will present with a redswollen ear canal with somedischarge. This is a very painfulcondition and should be referred to aphysician for proper treatment.
  8. 8. Disorders of the Outer Ear  External OtitisBesides water trapped in an earcanal, external otitis may result froman allergic reaction to the earmold orhearing instrument materials.
  9. 9. Disorders of the Outer Ear  External OtitisIf this condition is untreated overtime, the infection will deteriorate thetemporal bone, invade the brain, andresult in death. i.e. osteomyelitis ofthe temporal bone.
  10. 10. Disorders of the Outer Ear  Otomycosis During otoscopy you may observesmall mushrooms growing inside theear canal. The spores from thisfungus spread rapidly, so makecertain all equipment is immediatelysterilized.
  11. 11. Disorders of the Outer Ear  Osteomas & Exostoses They are often benign bony growthsfound inside the ear canal. Theyshould be observed for abnormalgrowth rate and noted in the chart.
  12. 12. Disorders of the Outer Ear  Osteomas & Exostoses If hearing loss is present with thiscondition, or if they are unusuallylarge or occluding the ear canal,physician referral is recommended.
  13. 13. Disorders of the Outer Ear Let’s review the Martin CD toview various external earpathologies.
  14. 14. Disorders of the Outer Ear  Cerumen aka Earwax Excessive cerumen can create greatdifficulties with the use of hearinginstruments. This condition shouldbe monitored and referredappropriately.
  15. 15. Disorders of the Outer Ear  Cerumen aka EarwaxTympanometry is a good test toperform when uncertain abouteardrum perforations or completelyoccluded ear canals.
  16. 16. Disorders of the Outer Ear Tympanic membrane (Eardrum)Perforations of the TM are not alwayseasily observed by otoscopy.Tympanometry will reveal even thesmallest of perforations. Note: Some perforations do not alwaysresult in measurable hearing loss.
  17. 17. Disorders of the Outer Ear Tympanic membrane (eardrum) Chronic middle ear infections canthicken and scar the TM. The TM willhave a white appearance.
  18. 18. Disorders of the Outer Ear Tympanic membrane (eardrum) A condition where calcium depositsform upon the TM and have spottywhite patterns exhibited, is identifiedas tympanosclerosis. Hearing lossmay or may not be associated withthis condition.

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