investigations of ear disease Flashcards
(20 cards)
what tuning fork is preferred?
512Hz
what is the Weber’s test?
place tuning fork on midline of patient’s forehead
- detects ear with better sensorineural hearing
in webers test which ear will a patient with conductive hearing loss in their left ear hear the tuning form better in?
left ear
in webers test which ear will a patient with sensorineural hearing loss in their left ear hear the tuning form better in?
right hear
in webers test what will the patient describe the sound as being if they have symmetrical hearing/hearing loss?
central
in webers test, a patient with unilateral conductive loss in their left ear will say that the sound is louder in that same ear (same if it was right), why?
as sensorineural upregulated
in webers test, a patient with unilateral sensorineural loss in their left ear will say that the sound is louder in the other ear (same if it was right), why?
sensorineural downregulated
how is rinne test carried out?
tuning fork in front of ear canal
AND
tuning fork behind ear or mastoid process (temporal bone)
what would the result be is the tuning form infront of ear canal is louder than the one behind the ear on mastoid process?
positive result
normal or sensorineural hearing loss
what would the result be if the tuning form behind the ear on the mastoid process is louder than the tuning fork in front of the ear canal?
negative result
conductive hearing loss
what would give a false rinne negative result?
severe sensorineural loss where noise heard in opposite ear as sound transmitted through skull
in an audiogram what will there be if the patient has conductive hearing loss?
gap between air and bone conduction thresholds
in an audiogram what will there be if the patient has sensorineural hearing loss?
no gap between air and bond conduction thresholds
in an audiogram what will there be if a patient has mixed hearing loss?
bit of both at different parts
what does a tympanogram test?
middle ear function
what does type A tympanogram indicate?
normal ear function
what does type As tympanogram inidcate?
ossicle ossification (shallow tymp)
what does type Ad tympanogram inidcate?
perforated eardrum (deep tymp)
what does type B tympanogram indicate?
eardrum movement restricted (fluid behind eardrum) OME