Ear exams and tests Flashcards
What frequency tuning fork to use for Rinne’s/Weber’s
512Hz
What type of hearling loss does Weber’s test?
SNHL
If Weber’s localises to the R ear, what does this mean
L SNHL
or R CHL
What is Rinnes
Air conduction vs Bone conduction
Rinnes in a healthy pt
AC > BC
Rinnes +ve
What does Rinne’s negative mean
BC > AC
= CHL
When can RInnes give a false negative
If SNHL is so profound, opposite ear may picked up the sound
What 2 ix should any pt w/ hearing loss be Rx for
PTA
Tynpanometry
speech - vowel sounds
speech power
speech - consonant sounds
speech meaning
impact of 30db hearing loss
Can just hear a whisper
impact of 90db hearing loss
Can just hear a shout
What is the speech frequency range?
250-8000Hz
What does -10db mean
Pt hears at intensity 10db quieter than the average person
better
Audiogram symbols - 0
R air conduction
Audiogram symbols - X
L air conduction
Audiogram symbols - [
R masked bone conduction
Audiogram symbols - ]
L masked bone conduction
If you pick up unilateral hearing loss on audiometry - what should be done
Ix for vestibular schwannoma
What does tympanometry measure
Compliance/stiffness eardrum
Fl on tympanommetry
Flat lime
Excessively tall peak on tympanometry
Hyperelastic drum = ossicular discontinuity
Type A tympanometry
Normal
Type B tympanometry
Flat line
™ perf/effusion
Check ear canal vol
Type C tympanometry
-ve P
Poor eustachian tube dysfunction
Type As tympanometry
Small peak
Otosclerosis
Type Ad tympanometry
Large peak
Ossicular discontinuity
What is Ossicular discontinuity
Separation of middle ear ossicles –> conductive HL
Causes of ossicular discontinuity (3)
Traumatic
Congenital
Cholesteatoma
4 things you MUST ask about in ENT Hx
Foreign travel
Swimming/showering
Ear bud use
MEds e.g gentamicin
