Quiz5 Flashcards
What are external ear structures?
Auricle, external auditory canal.
What are the middle ear structures?
Ossicles (malleus, incus, stapes) Tympanic membrane
What seperate the middle ear from the external ear?
Tympanic membrane
What transmit sound from tympanic membrane to the inner ear?
Ossicles
What are the inner ear structures?
Vestibule, semicircular canals, cochlea
What transmits sound to the eight C.N. ?
Cochlea
What part of the inner ear is involved in vestibular function?
Semicircular canals
What are some gross assessments to evaluate auditory functions (limited diagnostic accuracy)
Response to questions, Whispered voice test, finger rustle test.
For the Weber test what size tuning fork do you use?
512 Hz
If a person hesitates during the Weber test it usually has means what?
They heard it equally well in both ears
If they hear it well in both ears = normal = ?
Weber midline
During the Webber test the patent hears it better in the left eat what does that mean?
Weber left
If the sound lateralizes to one ear it’s either what to kinds of hearing loss?
Ipsilateral conductive or contralateral sensorineuronal
What is the most common hearing loss?
Conductive
What are some causes of conductive hearing loss?
Otosclerosis, foreign body, otitis media, cerumen impaction
Where do you place the tuning ford for a rinse test?
On the mastoid
If the air condition (part 2) is 2x longer as the bone conduction (part 1) the test is?
Normal
If the bone conduction is better during their rinse test what does this mean?
Negative rinne test = suggests a conductive hearing loss
When is conductive hearing loss most common?
Under 40
When is sensorineuronal hearing loss most common?
Usually Over 40
What are some causes of sensorineuronal hearing loss?
Presbycusis, anemias, hyperlipidemia, hypothyroidism, mumps