ECR Table Patterns of Hearing Loss

Question 1

What is the pathophsyiology of conductive loss

Answer 1

External or middle ear disorder impairs sound condution to inner ear

Question 2

what are causes of Conductive hearing loss?

Answer 2

1. foreign body
   2, otitis media (inflammation of middle ear)
2. perforated eardrum
3. otosclerosis of ossicles (abnormal growth of bone near middle ear)

Question 3

usual age of onset of conductive loss

Answer 3

childhood and young adulthood, up to age 40

Question 4

ear canal and drum of conductive loss

Answer 4

abnormality usually visible, except in otosclerosis

Question 5

Effects of Conductive Loss

Answer 5

Little Effect on sound

Hearing seems to improve in noisy environment

Voice becomes soft b/c inner ear and cochlear nerve are intact

Question 6

Is hearing better or worse in noisy environment with Conductive hearing loss

Answer 6

Better!

Question 7

What is Weber TEst in Conductive hearing loss (in unilateral hearin loss)

Answer 7

Tuning fork at vertexlo

louder in IMPAIRED Ear

Sound lateralizes to IMPAIRED EAR- room noise not well heard, so detection of vibration IMPROVES

Question 8

What are results of RINNE test in Conductive hearing

Answer 8

Tuning fork at external auditory meatus then on mastoid boine

Bone conduction longer than or equal to air conduction (BC>AC)

Louder in BONE!

while air conduciton through external or middle ear is impaired, vibrations through bone bypass problem to reach cochlea

Question 9

What is pathophysiology of sensorineural loss?

Answer 9

Inner ear disorder involves cochlear nerve and neuronal impulse transmission to brain

Question 10

What are causes of Sensorineural loss?

Answer 10

Loud noise exposure, inner ear infections, trauma, tremors, congenital and familial disorders, and aging

Question 11

Usual age of onset of sensoineural loss

Answer 11

Middle or later years

Question 12

Ear canal and drum of sensorineural

Answer 12

problem not vidisble

Question 13

Effects of sensorineural loss

Answer 13

Higher regsiters are lost, so sound may be distorted

hearing worsens in noisy environment

Voice may be loud b/c hearing is difficult

Question 14

How can you tell it is Sensorineural loss in Weber teest?

Answer 14

Sound lateralizes to GOOD EAR - inner ear or cochlear nerve damage impairs transmission to affected ear

Question 15

What are results of Rinne test with sensorieural test

Answer 15

AIR> BOne

Air conduction longer than bone conduciton A

AC>BC

inner ear or cochlear nerve is less able to transmit impulses regarless of how the vibration reach cochlea.