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Hearing loss: Difference between revisions

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(Created page with "* Conductive hearing loss ** Impaired conduction of sound through outer ear, tympanic membrane or middle ear ** Children and young adults ** Etiology *** Tympanic membrane perforation *** Otitis media with effusion *** Barotrauma *** Otosclerosis ** Diagnosis *** Pure tone audiometry **** Auditory threshold increased for air conduction **** Auditory threshold normal for bone conduction *** Speech audiometry **** Increasing loudness eventually leads to 100% speech compreh...")
 
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**** Sound is louder with bone than with air conduction (negative Rinne) = conductive HL in examined ear
**** Sound is louder with bone than with air conduction (negative Rinne) = conductive HL in examined ear


<noinclude>[[Category:Ear, nose, throat (ENT)]]‎</noinclude>
* Noise-induced hearing loss
** Excessive noise causes direct mechanical and metabolic injury
** Types
*** Acute acoustic trauma
**** < 1,5 ms sound of >140 dB
**** Gunshot, airbags, fireworks
*** Blast injury
**** Pressure wave ruptures tympanic membrane
*** Acute noise-induced hearing loss
**** Seconds – hours
**** Jet engine, concerts, power tools
**** Often reversible
*** Chronic noise-induced hearing loss
**** Chronic exposure to loud sounds
**** Loud music, party
** Clinical features
*** Muffled sensation
*** Tinnitus
** Diagnosis
*** Hearing threshold decreased at all frequencies, especially 3 – 6 kHz
 
<noinclude>
[[Category:Ear, nose, throat (ENT)]]‎</noinclude>