Untitled Deck Flashcards
What is Rinne’s test?
A hearing test where a tuning fork is placed over the mastoid process until the sound is no longer heard, followed by repositioning just over the external acoustic meatus.
Tuning fork pitch used for rinne’s and weber’s
512 Hz
What indicates a positive Rinne’s test? (aka normal)
Air conduction (AC) is normally better than bone conduction (BC).
What indicates a negative Rinne’s test?
If bone conduction (BC) is greater than air conduction (AC), then conductive deafness is indicated.
What is Weber’s test?
A hearing test where a tuning fork is placed in the middle of the forehead equidistant from the patient’s ears.
What does it mean if sound is localized to the unaffected side in Weber’s test?
This indicates unilateral sensorineural deafness.
What does it mean if sound is localized to the affected side in Weber’s test?
This indicates unilateral conductive deafness.
Conductive hearing loss
B>A; weber’s lateralises to BAD ear
External or middle ear pathology affects the conduction of sound into the inner ear
Conductive hearing loss - Conditions
- Otitis externa
- Otitis media (+/- effusion)
- Wax (cerumen) impaction
- Foreign body
- Cholesteatoma
- Tympanic membrane perforation
Sensorineural hearing loss
A>B; weber’s lateralises to GOOD ear
Inner ear, cochlear or auditory nerve pathology impaired neuronal transmission to the brain
Sensorineural hearing loss - Conditions
- Congenital or hereditary sensorineural hearing loss
- Presbycusis (age-related)
- Noise-induced hearing loss
- Acoustic neuroma
- Ototoxic drugs
- Infection
- Autoimmune