Term
| Functions of the Outer Ear |
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Definition
1. Protect more delicate structures
2. Amplify high frequency sounds
3. Sound localization |
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Term
| Components of the Outer Ear |
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Definition
1. Pinna (Auricle)
2. External Auditory Canal (EAC)
3. Tympanic Membrane |
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Term
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Definition
| Abnormal smallness of the pinna, Down Syndrome |
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Term
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Definition
| Absence of the pinna, Down Syndrome |
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Term
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Definition
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Term
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Definition
| Congentical absent or complete closure of the ear canal, Treacher Collins Syndrome |
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Term
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Definition
| Epithelial mounds or pedunculated skin that arise near the front of the ear around the tragus |
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Term
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Definition
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Term
| Atresia Audiogram Characteristics |
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Definition
| Usually flat conductive loss, moderately severe-severe loss, unilateral or bilateral |
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Term
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Definition
| An infection in the skin of the external auditory canal, swimmers ear, can be painful, treated with antibiotics |
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Term
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Definition
| Excessive build up of ear wax in the external ear canal, water and cotton swaps and push wax father in canal, can produce mild-moderate conductive hearing loss |
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Term
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Definition
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Term
| Disorders of the External Auditory Meatus |
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Definition
• Atresia
• External Otitis
• Impacted Cerumen
• Foreign Bodies
• Tumors/Cysts
• Collapsed Ear Canal |
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Term
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Definition
| Tumors usually aren't malignant and usually aren't removed if they aren't affecting anything; cysts are a fluid filled sac |
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Term
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Definition
| Putting supra-aural headphones on collapse ear canal can produce a "fake" conductive loss, use insert earphones,
usually not more that 15-30dB loss, maybe a greater dip at 2000Hz |
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Term
| Disorders of the Tympanic Membrane |
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Definition
| Perforations (central, attic, marginal), Tympanosclerosis |
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Term
| Causes for Tympanic Membrane Perferations |
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Definition
| Traumatic perforations, to relieve pressure from middle ear infections |
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Term
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Definition
| In pars tensa portion of TM |
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Term
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Definition
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Term
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Definition
| At the edge of the margin of the membrane |
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Term
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Definition
| Surgical repair of a perforated tympanic membrane, graft using fascia |
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Term
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Definition
| Thickening of the tympanic membrane as a result of a middle ear infection, does not respond well to surgical or medical treatment |
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