Ear Tests Flashcards
Ent tests
What is areal ratio ?
What is lever ratio ?
What is total transformer ratio ?
Areal : 17:1
Lever : 1.3
Total: 22
Better heard frequency used m.c in tuning fork ?
512 hz
Speech frequencies ?
500,1000,2000
Frequency used for assessment of vibration
<512 hz
Neurotransmitter in auditory pathway ?
Glutamate
Rinnes test
+Ve ….
-ve….
+ …. Normal/SNHL
-….. CHL/SEVERE SNHL
Weber or Rennie which is more sensitive ?
Weber
Weber test
Use to differentiate between conductive and severe snhl.
Tuning fork is placed on forehead, vertex or upper teeth .
It asses lateralization of sound.
In SNHL : LATERALIZATION TO OPPOSITE SIDE OF DEFECT
IN CHL : LATERALIZATION TO SAME SIDE
Tragus occluded in ABC
Tragus occluded in schabach test
Abc for CHL AND SNHL
Schwabach for CHL AND SNHL
TRUE OR FALSE EACH STATEMENT
T
F
F
T
Test for osicular fixation ?
Gelles test.
Seigel speculum is used
Hearing loss in
- Complete obs for EAC
- TM PERFORATION
- TM PERFORATION WITH OSICULAR DISCONTINUATION
- OSICULAR DISCONTINUATION WITH TM INTACT
- OTOSCLEROSIS
- 30db
- 10-40 db
- 40 db
- 55 db
- 60 db
Upto which frequency is audiogram considered normal ?
25 hz
STATE ASHA AND WHO CLASSIFICATION FOR GRADES OF HEARING LOSS
Asha Normal: <25 Mild : 26-40 Moderate : 41-55 Moderate severe: 55-70 Severe : 70-90 Profound:>90
Who Normal : <25 Mild: 26-40 Moderate: 40-60 Severe: 61-80 Profound: >80
AC BC gap indicates ?
> 15 db gap indicates CHL
Causes of downslope HL
Causes of upslope HL
Cause of Trough / U shape HL
Downslope : high freq HL
Presbycusis
Ototoxicity
Noise trauma
Upslope : low freq HL
Meniere
TROUGH :
Speech frequencies HL
Congenital SNHL
What is carharts notch
AC - All frequency are defective
Bc - Dip at 2k frequency
Occurs in OTOSCLEROSIS
Dip at 4k seen in…..
NOise induced HL
Impedence audiometry
Assessment of middle ear
Asses :
- Tympanometry
- Stapedial reflex
Probe with 3 openings …
- High compliance normal pressure ?
- Low compliance normal pressure ?
- Low compliance low pressure ?
- Normal compliance low pressure ?
- Ad
- As
- SOM
- ET obstruction
What is recruitment ?
It is abnormal increase in loudness of loud sound.
As loudness increases patient hears better.
Test: short increment sensitivity index
- if 72-100 percent of one db increments is identified correctly — abnormal ear
Differentiate sensory versus neuronal hearing loss.
If recruitment + — sensory HL - cochlear deafness
Oto acoustic emmision is due to
Outer hair cells
Outer hair cell are prone to damaged by ?
Ototoxicity
Noise trauma
Which is most commonly used for screening of HL in neonates ?
Which is best for screening in neonates ?
Which is used for screening of neaonates in ICU ?
- OAE
- BERA
- BERA
Types of OAE ?
WHICH TYPE IS USED FOR SCREENING OF NEONATES ?
WHICH IS USED TO MONITOR OTOTOXICITY ?
- 2… Transient and distortion product
- Transient
- Distortion product
