05-12-2009, 05:25 AM
How to distinguish sensorineural from conductive hearing loss?
Regarding the thread "first aid 2009" by t - 4weeksexam
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05-12-2009, 05:25 AM
How to distinguish sensorineural from conductive hearing loss?
05-12-2009, 05:41 AM
1. weber test
if conduction deafness-> louder in affected ear if sensorineural->louder in normal ear 2. rinne test a, mastoid, b, in front of ear: if conduction deafness --> no air conduction if sensorineural-->air conduction present
05-12-2009, 05:50 AM
answer 3....left sensorineural loss...
05-12-2009, 05:51 AM
[edit] Differential diagnosis
Table 1. A table comparing sensorineural to conductive hearing loss Criteria Sensorineural hearing loss Conductive hearing loss Anatomical Site Inner ear, cranial nerve VIII, or central processing centers Middle ear (ossicular chain), tympanic membrane, or external ear Weber Test Sound localizes to normal ear Sound localizes to affected ear (ear with conductive loss) Rinne Test Positive Rinne; Air conduction > Bone conduction (both air and bone conduction are decreased equally, but the difference between them is unchanged). Negative Rinne; Bone Conduction > Air Conduction (Bone/Air Gap) Sensorineural hearing loss may be congenital or acquired
05-12-2009, 05:54 AM
plz ignore above post;;wanted to paste a table but didnt work out
05-12-2009, 01:19 PM
Ans 4
Sensorineural hearing loss Anatomical Site: Inner ear, cranial nerve VIII, or central processing centers Weber Test: Sound localizes to normal ear Rinne Test: Positive Rinne; Air conduction > Bone conduction (both air and bone conduction are decreased equally, but the difference between them is unchanged). Conductive hearing loss Anatomical Site: Middle ear (ossicular chain), tympanic membrane, or inner ear Weber Test: Sound localizes to affected ear (ear with conductive loss) Rinne Test : Negative Rinne; Bone Conduction > Air Conduction (Bone/Air Gap) |
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