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Ent > Ear Tests > Flashcards

Ear Tests Flashcards

Ent tests

1
Q

What is areal ratio ?
What is lever ratio ?
What is total transformer ratio ?

A

Areal : 17:1
Lever : 1.3
Total: 22

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2
Q

Better heard frequency used m.c in tuning fork ?

A

512 hz

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3
Q

Speech frequencies ?

A

500,1000,2000

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4
Q

Frequency used for assessment of vibration

A

<512 hz

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5
Q

Neurotransmitter in auditory pathway ?

A

Glutamate

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6
Q

Rinnes test
+Ve ….

-ve….

A

+ …. Normal/SNHL

-….. CHL/SEVERE SNHL

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7
Q

Weber or Rennie which is more sensitive ?

A

Weber

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8
Q

Weber test

A

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

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9
Q

Tragus occluded in ABC
Tragus occluded in schabach test
Abc for CHL AND SNHL
Schwabach for CHL AND SNHL

TRUE OR FALSE EACH STATEMENT

A

T
F
F
T

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10
Q

Test for osicular fixation ?

A

Gelles test.

Seigel speculum is used

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11
Q

Hearing loss in

  1. Complete obs for EAC
  2. TM PERFORATION
  3. TM PERFORATION WITH OSICULAR DISCONTINUATION
  4. OSICULAR DISCONTINUATION WITH TM INTACT
  5. OTOSCLEROSIS
A
  1. 30db
  2. 10-40 db
  3. 40 db
  4. 55 db
  5. 60 db
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12
Q

Upto which frequency is audiogram considered normal ?

A

25 hz

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13
Q

STATE ASHA AND WHO CLASSIFICATION FOR GRADES OF HEARING LOSS

A 
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
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14
Q

AC BC gap indicates ?

A

> 15 db gap indicates CHL

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15
Q

Causes of downslope HL
Causes of upslope HL
Cause of Trough / U shape HL

A

Downslope : high freq HL
Presbycusis
Ototoxicity
Noise trauma

Upslope : low freq HL
Meniere

TROUGH :
Speech frequencies HL
Congenital SNHL

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16
Q

What is carharts notch

A

AC - All frequency are defective
Bc - Dip at 2k frequency

Occurs in OTOSCLEROSIS

17
Q

Dip at 4k seen in…..

A

NOise induced HL

18
Q

Impedence audiometry

A

Assessment of middle ear

Asses :

  1. Tympanometry
  2. Stapedial reflex

Probe with 3 openings …

19
Q
  1. High compliance normal pressure ?
  2. Low compliance normal pressure ?
  3. Low compliance low pressure ?
  4. Normal compliance low pressure ?
A
  1. Ad
  2. As
  3. SOM
  4. ET obstruction
20
Q

What is recruitment ?

A

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

21
Q

Oto acoustic emmision is due to

A

Outer hair cells

22
Q

Outer hair cell are prone to damaged by ?

A

Ototoxicity

Noise trauma

23
Q

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 ?

A
  1. OAE
  2. BERA
  3. BERA
24
Q

Types of OAE ?
WHICH TYPE IS USED FOR SCREENING OF NEONATES ?
WHICH IS USED TO MONITOR OTOTOXICITY ?

A
  1. 2… Transient and distortion product
  2. Transient
  3. Distortion product
25
Q

BERA full form

A

BRAINSTEM EVOKED RESPONSE AUDIOMETRY

26
Q

Waves in BERA

A
  1. . cochlear nerve distal
  2. . cochlear nerve proximal
  3. . Cochlear nuclei
  4. . sup olivary nuclues
  5. . lateral leminiscus— most prominent
  6. . inf colliculus

Total 6 waves

27
Q

Best investigation for cochlear HL/ meniere

A

Electro cochleo graphy

28
Q

Fistula can be in which location ?

A
  1. Lateral SCC
  2. PROMONTORY
  3. OVAL WINDOW
  4. ROUND WINDOW
29
Q

False negative in fistula test

False positive in fistula test

A
  1. Fistula covered by cholesteatoma
    Dead labyrinth
  2. Hennebert sign ( hypermobility of stapes)
    Eg. Congenital syphilis , superior SCC dehisence
30
Q

BPPV
DIAGNOSTIC TEST ?
MANAGEMENT. ?

A
  1. Dx - Dix hallpike manoever

2. Tx - epley maneuver

31
Q

Rgt nystagmus means

A 
Rt hyperactivity ( irritation ) eg vestibular neuritis
Or 
Lt hypoactivity ( destruction)
32
Q

Alexander law ?

A

Nystagmus increase when gaze is on same side of lesion

Nystagmus decrease when gaze in on opp side of lesion

33
Q

In caloric test which SCC is tested

A

Lateral scc

34
Q

Nerve supple of cochlea

A

Posterior SCC and sacule - singular nerve ( inf vestibular nerve)

Utricle and lateral scc and ant scc – sup vestibular nerve

35
Q

Most common affected nerve in acoustic neuroma

A

INF VESTIBULAR NERVE IN IAM

Ent (7 decks)

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