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### 32 Multiple choice questions

1. peak b/w +50 to -150, compliance w/in normal range
2. -Probe tone generator: creates a standard ongoing sound (typically, 226 Hz at a standard level and always there)

-Signal generator: creates other signals, like pure-tones for acoustic reflexes

-Pressure pump: changes pressure in the EC
3. as it moves it makes the ossicles move; move sound from the TM to the oval window
4. air pockets and is continuous into the ME, impacts the pressure as well
5. -Adult: .6 - 1.5 ml

-Child: .4 - 1.0 ml

-Type B: With normal volume: suggests poor mvmt of the TM or poor ME function
6. lets fresh air into air, equalizes ME space
7. -Half the height of the tympanogram on both sides, and look at the width b/w the two points

-Child: 60-150 daPa
8. -Probe tone: has the ongoing 226 Hz tone coming out of it; doing the MEASURING

-Pressure: measures pressure

-Mic: measures the bounce back
9. +50 to -150 daPa

-B/w -100 to -150 it may still cause a conductive loss

-Low: > -150 = Type C, suggests they have negative pressure (ET tube isn't opening and letting air in)

-High: > +50 = suggests positive pressure
10. -We want to know how well the TM moves

-We can measure in a theoretic manner

-EX: The TM is complaint, meaning there isn't much impedance

-We do this by using equivalent volumes
11. -peak > -150

-Suggests they have negative pressure (ET tube isn't opening and letting air in)
12. -FIRST, perform Otoscopy

-Hermetic seal: get a good seal; pick the correct sized tip so there isn't a leak

-+200 daPa: read what the equivalent volume coming back

-Volume in ml (actual volume) will give you a REAL volume of the EC
13. -Probe tone

-Pressure varied

-Reflected sound

-Mic measures

-Compare baseline

-Plot results
14. -compliance < .3 (adults) or .2 (child) = shallow; normal peak

- Suggests stiffness of the ME system
15. no peak: suggests poor mvmt of the TM or poor ME function (w/ normal vol.)
16. 1. Otoscopy

2. Hermetic seal

3. +200 daPa vary in 50 daPa steps (when equal you will get the max compliance)

4. Compare to baseline

5. Compare results
17. -compliance < .3 (adults) or .2 (child) = shallow; normal peak

- Suggests stiffness of the ME system
18. There will be some component that is a conductive component, but regular tymp. didn't catch it
19. -when we hear a loud sound the muscles will pull back and tense up the muscles to protect the ossicles, prevent the sound from traveling (e.g., tensor tympani, stapedius)
20. -Imaginary, not real volumes

-A theoretic volume that we are estimating that gives us a volume

-We put a sound in and measure how much comes back

-What does not bounce back is the same sound in a bigger "room" if there is a hole or perf.

-What bounces back is the equivalent volume
21. enhance sound from air to sound, impendence mismatch transformer, sensitive to change
22. -TM

-Ossicles

-ET

-Mastoid

-Muscles
23. -For sound to travel it's best, will take more effort to move fluid than air

-Without equal pressure, or fluid in the ME will make it harder for the sound to go through

-The ET helps equalize, so the ossicles can enhance (boost) the sound.
24. Suggests a perforation of the TM or PE tubes
25. strictly a conductive disorder

-Child: > .4 ml

Type B: with small vol. suggests obstruction of the EC wax or blockage
27. Suggests obstruction of the EAC, wax/blockage
28. conductive disorder
29. Dictates the loudness

-Child: < 1.0 ml

-Type B: with large vol. suggest a perforation or PE tube in TM
31. -Tympanometry

-Change Probe Frequency

-Look for notching: called 3Ys or notched A for type, if a tympanogram had a notch, comes back up

-Has a peak and we need to test with a different probe Hz than 260 Hz,

-Do it again, to make sure it's there. Then repeat at different freq.
32. peak - base = compliance (use this formula if the base is not at 0)