Retrocochlear

Question 1

Acoustic neuroma is

Answer 1

VIII nerve tumor

Question 2

the site of lesion of the VIII nerve tumor

Answer 2

inferior part of the vestibulat branch (vestibular schwannoma)

Question 3

Prevalence of acoustic neuroma

Answer 3

1/100,000 per year

Question 4

Acoustic neuroma is common in adults who are ….

Answer 4

More than 30 y/o

Question 5

Symptoms of acoustic neuroma

Answer 5

Hearing loss 
Tinnitus 
Dizziness 
Facial numbness
Poor SRS

Question 6

Causes of acoustic neuroma

Answer 6

Naturally occur 
CVA 
Neurofibromatosis
Multiple sclerosis 
Hemorrhage 
Sylphilis 
Kernicterus

Question 7

Diagram of acoustic neuroma

Answer 7

Asymmetric SNHL

Question 8

OAE of acoustic neuroma

Answer 8

Present in both ears

Question 9

Tympanogram of acoustic neuroma

Answer 9

Type A

Question 10

ABR of acoustic neuroma

Answer 10

Abnormal (wave V)

But wave I is normal

Question 11

Reflex decay of acoustic neuroma

Answer 11

> 50%

Question 12

Acoustic reflex of acoustic neuroma

Answer 12

Absent for both ears

But present for ipsilateral non-involved ear

Question 13

CAPD stands for

Answer 13

Central auditory processing disorder

Question 14

Characteristics of CAPD patients

Answer 14

Normal hearing but having problem with auditory information processing

+ADHD/ dyslexic

Question 15

OAE of CAPD

Answer 15

Normal

Question 16

Reflexes of CAPD

Answer 16

Normal

Question 17

What would WDS be if the inner hair cells are impaired?

Answer 17

Poor WDS

Question 18

What would the WDS be if the outer hair cells are impaired?

Answer 18

Good WDS

Question 19

SNHL severity if OHC are impaired

Answer 19

60dB HL

Question 20

Disorders involving impairment of OHC

Answer 20

• presbycusis

- noise-induced hearing loss

Question 21

Tympanometry ….. Hz probe tone

Answer 21

1,000 Hz

Traditional 226 Hz (@90dB SPL)

Question 22

Tympanometry provides little to no information for infants until …… of age

Answer 22

7 months

Question 23

Normal tympanogram = type ….

Answer 23

Type A

Question 24

Type As tympanogram

Answer 24

reduced compliance (stiffened)

Question 25

Patients with ….. have type As tympanogram

Answer 25

otosclerosis

Question 26

Type Ad tympanogram

Answer 26

Increased/ hyper compliance

Discontinuity, ossicular chains

Question 27

Type B tympanogram

Answer 27

Infections, fluid in the middle ear space or perforated eardrum

Question 28

Type C tympanogram

Answer 28

normal compliance

But retracted eardrum

Question 29

Peak pressure for type Ad tympanogram

Answer 29

+15daPa

Question 30

Type Ad compliance

Answer 30

1.9 cc

Question 31

Type As peak pressure

Answer 31

-25 daPa

Question 32

Type A compliance

Answer 32

0.2 cc

Question 33

Peak pressure of type C

Answer 33

-150 daPa

Question 34

Compliance for type C

Answer 34

normal or reduced

Question 35

……. is also used to detect non-organic HL, facial nerve function and possible retrocochlear pathology

Answer 35

acoustic reflex

Question 36

If there is middle ear dysfunction or severe hearing loss, reflex will be

Answer 36

absent

Question 37

Reflex decay test presents stimulus tone @ what frequency and intensity? How long?

Answer 37

10dB above reflex threshold @ 500 or 1000 Hz for 10 seconds

Question 38

OAE reveals the status of …..

Answer 38

cochlea

Question 39

ABR reveals the status of

Answer 39

neural integrity

Question 40

ABR (tone burst) …….. thresholds …..

Answer 40

predict thresholds within 10-20 dB HL

Question 41

If TEOAE is present, HL is

Answer 41

below mild

Question 42

If DPOAE is present, HL is

Answer 42

below moderate

Question 43

Stimuli for TEOAE

Answer 43

clicks (transient)

Question 44

Stimuli for DPOAE

Answer 44

distortion product (3 tones, different frequencies)