Regarding the thread "first aid 2009" by t - 4weeksexam

[ArchivalUser]

How to distinguish sensorineural from conductive hearing loss?

[ArchivalUser]

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

[ArchivalUser]

answer 3....left sensorineural loss...

[ArchivalUser]

[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

[ArchivalUser]

plz ignore above post;;wanted to paste a table but didnt work out

[ArchivalUser]

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)