3 - ENT - Otology - Conductive vs. Sensorineural deafness Flashcards
1
Q
define conductive deafness
A
impaired sound transmission through the external canal and middle ear ossicles to the stapes
2
Q
3 causes of conductive deafness
A
external canal obstruction
drum perforation
middle ear problems
3
Q
what can cause external canal obstruction
A
wax, pus, debris, foreign body, developmental abnormalities
4
Q
what can cause middle ear problems?
A
,infection, trauma, ossicle abnormalities
5
Q
define sensorineural deafness
A
defects central to cochlear oval window (sensory), cochlear nerve (neural), or centrally
6
Q
long term causes of sensorineural deafness
A
menieres
presbyacusis
cochlear vascular disease
7
Q
short term causes of sensorineural deafness
A
postinfective
ototoxic drugs
trauma
