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32 True/False questions

  1. Static Compliance-Adult: > .6 ml

    -Child: > .4 ml

    Type B: with small vol. suggests obstruction of the EC wax or blockage

          

  2. Type Ano peak: suggests poor mvmt of the TM or poor ME function (w/ normal vol.)

          

  3. Abnormal Multifrequency TympanometryThere will be some component that is a conductive component, but regular tymp. didn't catch it

          

  4. Tympanometry: Procedure1. 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

          

  5. Background Concepts:

    Size of a Hard-walled Cavity
    -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.

          

  6. Eustachian Tube (ET)lets fresh air into air, equalizes ME space

          

  7. Immittance Devices:

    Inside Component
    -Probe tone: has the ongoing 226 Hz tone coming out of it; doing the MEASURING

    -Pressure: measures pressure

    -Mic: measures the bounce back

          

  8. Type C-peak > -150

    -Suggests they have negative pressure (ET tube isn't opening and letting air in)

          

  9. Abnormal Physical Volumestrictly a conductive disorder

          

  10. Small Volume-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

          

  11. Type B w/ a large volumeSuggests a perforation of the TM or PE tubes

          

  12. Background Concepts:

    Equivalent Volume
    -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.

          

  13. Background Concepts:

    Compliance
    -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

          

  14. Abnormal Tympanometryconductive disorder

          

  15. Multifrequency Tympanometry-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.

          

  16. Ossicles-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)

          

  17. Type B-peak > -150

    -Suggests they have negative pressure (ET tube isn't opening and letting air in)

          

  18. Phsyical Volume-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

          

  19. Type A(S)peak b/w +50 to -150, compliance w/in normal range

          

  20. TM-Half the height of the tympanogram on both sides, and look at the width b/w the two points

    -Adult: 40-110 daPa

    -Child: 60-150 daPa

          

  21. Mastoidair pockets and is continuous into the ME, impacts the pressure as well

          

  22. Immittance Devices:

    How it Works
    -Probe tone

    -Pressure varied

    -Reflected sound

    -Mic measures

    -Compare baseline

    -Plot results

          

  23. Large Volume-Adult: < 1.5 ml

    -Child: < 1.0 ml

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

          

  24. Muscles-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)

          

  25. Immittance Devices:

    Probe Components
    -Probe tone: has the ongoing 226 Hz tone coming out of it; doing the MEASURING

    -Pressure: measures pressure

    -Mic: measures the bounce back

          

  26. Type A(D)peak b/w +50 to -150, compliance w/in normal range

          

  27. Type B w/ small volumeSuggests a perforation of the TM or PE tubes

          

  28. Pressureair pockets and is continuous into the ME, impacts the pressure as well

          

  29. Anatomy of the ME-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

          

  30. Background Concepts:

    Equal Impedance
    -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

          

  31. Normal Volume-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

          

  32. Width-Half the height of the tympanogram on both sides, and look at the width b/w the two points

    -Adult: 40-110 daPa

    -Child: 60-150 daPa