CSCD 4301 Study Guide - Final Guide: Earwax, Electronystagmography, Newborn Screening
26 Jan 2016
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Outline what you know about the following disorders using these guidelines: Important tests that help identify problem (speech results, immittance, etc. ) Snhl: membranes: cochlear damage to internal structures (hair cells, air and bone are within 5-10 db no significant air/bone gap, speech scores will depend on severity of loss. Problem in outer ear or middle ear, or both. Tuning fork tests (use of occlusion effect) identify conductive hl. 500, 1k hz) due to osseotympanic bone conduction. Exhibited by better sensitivity to bone conducted stimuli when ear canal occluded. The external ear forms earlier than the middle ear. Microtia and atresia imply an arrest in development. The earlier the arrest, the less developed the middle at any stage ear. External canal re-canalizes by the 6th month. 2: outer ear disorders hl is more variable than inner, all outer ear disorders are diagnosed by looking at ear disorders ear externally and through an otoscope.
