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31 Matching questions

  1. Immittance Devices:

    Inside Component
  2. Muscles
  3. Mastoid
  4. Type B w/ a large volume
  5. Background Concepts:

  6. Background Concepts:

    Equivalent Volume
  7. Phsyical Volume
  8. Abnormal Tympanometry
  9. Abnormal Multifrequency Tympanometry
  10. TM
  11. Eustachian Tube (ET)
  12. Static Compliance
  13. Type A(D)
  14. Normal Volume
  15. Abnormal Physical Volume
  16. Type B w/ small volume
  17. Type C
  18. Pressure
  19. Anatomy of the ME
  20. Background Concepts:

    Size of a Hard-walled Cavity
  21. Type B
  22. Large Volume
  23. Background Concepts:

    Equal Impedance
  24. Immittance Devices:

    Probe Components
  25. Width
  26. Immittance Devices:

    How it Works
  27. Ossicles
  28. Multifrequency Tympanometry
  29. Type A
  30. Tympanometry: Procedure
  31. Small Volume
  1. a Suggests obstruction of the EAC, wax/blockage
  2. b strictly a conductive disorder
  3. c Suggests a perforation of the TM or PE tubes
  4. d -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)
  5. e -peak > -150

    -Suggests they have negative pressure (ET tube isn't opening and letting air in)
  6. f -Adult: < 1.5 ml

    -Child: < 1.0 ml

    -Type B: with large vol. suggest a perforation or PE tube in TM
  7. g +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
  8. h -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.
  9. i -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.
  10. j as it moves it makes the ossicles move; move sound from the TM to the oval window
  11. k -TM




  12. l enhance sound from air to sound, impendence mismatch transformer, sensitive to change
  13. m no peak: suggests poor mvmt of the TM or poor ME function (w/ normal vol.)
  14. n -compliance < .3 (adults) or .2 (child) = shallow; normal peak

    - Suggests stiffness of the ME system
  15. o -Probe tone: has the ongoing 226 Hz tone coming out of it; doing the MEASURING

    -Pressure: measures pressure

    -Mic: measures the bounce back
  16. p -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
  17. q peak - base = compliance (use this formula if the base is not at 0)

    -Adults: .3 - 1.4 ml

    -Child: .2 - .9 ml
  18. r -Adult: > .6 ml

    -Child: > .4 ml

    Type B: with small vol. suggests obstruction of the EC wax or blockage
  19. s Dictates the loudness
  20. t -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
  21. u peak b/w +50 to -150, compliance w/in normal range
  22. v -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
  23. w -Probe tone

    -Pressure varied

    -Reflected sound

    -Mic measures

    -Compare baseline

    -Plot results
  24. x lets fresh air into air, equalizes ME space
  25. y -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
  26. z air pockets and is continuous into the ME, impacts the pressure as well
  27. aa There will be some component that is a conductive component, but regular tymp. didn't catch it
  28. ab conductive disorder
  29. ac 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
  30. ad -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
  31. ae -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