evaluations Flashcards
1
Q
first step
A
otoscopic evaluation
2
Q
otoscopic eval
A
- make sure ears are clear of wax, foreign body, drainage from middle ear infection
- if able to visualize TM, make sure its not red, irritated, no perforations
- can you see cone of light?
3
Q
middle ear eval
A
if EAM is clear, perform tymps/immitence testing
4
Q
tymps
A
allow us to examine the middle ear functioning by using measures of pressure and movement of middle and outer ear
5
Q
3 principles of tymps
A
pressure (air pressure behind ear drum)
compliance (how much the TM moves)
volume (how much space is in the inner ear)
6
Q
tymp probe tip
A
- placed at opening of ear canal
- has air pump to change pressure
- sends out 220 hz tone and also has mic to record how ear reacts to tone
- pressure is varied from -200-200 hz
7
Q
tymp pressure
A
- values are indicative of amount of pressure in middle ear cavity
- measurements made in decapascals
- normal middle ear cavity maintains a pressure that approximates normal atmospheric pressure
8
Q
tymp compliance
A
- values indicative of amount of mobility
- measured in cubic cm or mm
9
Q
what can cause change in compliance?
A
- scarring
- hole
- fluid
- ossicles fused together (otosclerosis)
10
Q
what if compliance is too high?
A
- disarticulation of ossicular chain
- hypermobile drum (stretched out over time)
11
Q
tymps volume
A
- measures estimated volume of ear canal from probe tip to the drum
- range of normal varies
12
Q
large volume is suggestive of…
A
patent/open tubes
13
Q
small volume is suggestive of…
A
clogged tubes/ not functioning properly
14
Q
tymps with normal pressure
A
Ad
As
A
15
Q
Ad
A
high compliance normal pressure
- compliance greater than 2.0
- may show hearing loss
