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ENT > Ear-audiology And Tests > Flashcards

Ear-audiology And Tests Flashcards

1
Q

When do you say it is CHL and when do you say it is SNHL

A

When the external ear and middle ear affected – CHL

When the inner ear and 8th nerve are affected – SNHL

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2
Q

Examples of CHL

A

Wax
Glue ear
CSOM
Otosclerosis

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3
Q

When do you see cochlear hearing loss and retro cochlear hearing loss and eg

A

Cochlear hearing loss is sensory hearing loss (affects cochlea) e.g. menials disease
Retro cochlear hearing loss is neural hearing loss(affects 8th nerve) e.g. acoustic neuroma

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4
Q

What does bone conduction test

A

Checks cochlea and 8th nerve because it reaches the cochlea directly
If BC is poor means a SNHL

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5
Q

What frequency is used in tuning fork test Most commonly

A

512 Hz

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6
Q

Why is 512 Hz used for tuning fork test

A

Produces sound for a long duration

It has less vibration

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7
Q

Check the table for Rinne’s Weber and ABC/shwbach

A

Please

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8
Q

Difference between ABC and Shwbach test

A

ABC-EAC closed

Shwbach test- EAC kept open

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9
Q

Why is the false negative Rinne in U/L SNHL

A

Due to transcranial transmission of sound to other side cochlea when BC is checked on the diseased side

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10
Q

Which colour line is used for which year in a audiogram

A

Red line – right ear

Blue line – left ear

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11
Q

Name the kind of symbols in AC and BC Used on an audiogram

A

AC – close symbols

BC – open symbols

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12
Q

AB gap is present in

A

CHL

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13
Q

Difference between otosclerosis and noise induced hearing

A

Otosclerosis-CHL
Dip at 2000 Hz
Carrhart’s notch

Noise induced hearing loss – SNHL
Dip at 4000 Hz
Acoustic dip

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14
Q

Name some test to differentiate between cochlear and retrocochlear hearing loss

A

Tone decay test
SISI
Recruitment test
Speech audiometry

Please check the description from the Notes

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15
Q

What is the full form of BERA

A

Brainstem evoked response audiometry

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16
Q

How many waves does BERA have And its sources

A 
Seven waves
E – wave one and two
C – wave three
O– wave four
L – wave five
I – wave six and seven
17
Q

indications/uses of BERA

A 
Paediatric cases
Medicolegal cases (malingerers)
18
Q

Otoacoustic emission. Principle

A

When we give sound to healthy cochlea produces echoes from outer hair cells

19
Q

Ideal hearing screening investigation in neonates

A

Oto acoustic emission

20
Q

What is the ideal hearing screening investigation for NICU baby and meningitis baby

A

BERA

21
Q

Stapedial reflex absent in

A

Deaf patient
Bell’s palsy
Otosclerosis

ENT (34 decks)

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