Hearing loss Flashcards Preview

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Flashcards in Hearing loss Deck (6)
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1
Q

What tuning fork to use in assessing hearing loss

A

512Hz

2
Q

Rinne’s test interpretation

A

Normal: Air conduction better than bone conduction

Abnormal (‘negative’): AC

3
Q

How to perform Rinne’s test

A

Hold 512Hz tuning fork to mastoid, and ask patient to indicate when they stop hearing it. At this point quickly move the tuning for to just in front of external auditory canal, and ask if they can hear it there.

4
Q

Interpretation of Weber’s test

A

Normal: central
SNHL: lateralises to normal ear
Conductive: lateralises to abnormal ear

5
Q

Causes of conductive hearing loss

A

Impaired conduction anywhere between auricle and round window
Canal obstruction: wax, foreign body
Tympanic membrane perforation: trauma, infection
Ossicle defects: otosclerosis, infection
Fluid in the middle ear

6
Q

Causes of sensorineural hearing loss

A

Defects of the cochlea, cochlear nerve, or brain.
Congenital: Alport’s syndrome (sensorineural hearing loss + haematuria), Jewell-Lange-Nielsen (sensorineural hearing loss + long QT).
Acquired: presbyacusis, drugs (gentamicin, vancomycin), infection (meningitis, measles), tumour (vestibular Schwannoma).