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45 Multiple choice questions

  1. there's an obstruction of the ear canal or improper probe placement
  2. NOT to diagnose a disorder, but to assess the outer ear and TM and middle ear for something obviously atypical
    (can assist in interpreting other audiological evaluation results)
  3. less than 0.3 ml
    -reflects stiffness of the middle ear system.
  4. point where there is most acoustic energy passed
  5. peak admittance (sometimes static compliance)
    physical volume (aka ear canal volume)
    peak pressure
  6. Detecting middle ear disorders (tympanometry and reflexes)

    Differentiating different types of middle-ear pathology (tymp. and reflexes)

    Differentiating cochlear from retrocochlear pathology (reflexes & reflex decay)

    Facial nerve (reflex) and eustachian tube function (tympanometry)
  7. before tympanometry
  8. the tympanic membrane is not intact (so it picks up the volume of the middle ear too)
  9. 0.3 ml - 2.0 ml
  10. indicates normal middle ear function, NOT normal hearing
  11. middle ear pressure is negative relative to outer ear pressure. Sign of Eustachian Tube Dysfunction
  12. where the tympanogram peak falls horizontally
  13. color: not normal if white or grey.
    Bulging or Retraction
    Fluid line or Bubbles
    Perforation
    Mass
  14. measure stapedial muscle reflex, which stiffens the middle ear system when elicited by high intensity sounds.
  15. greater than 2.0 ml.
    -reflects flaccidity of TM/ossicles, aka excessive compliance
  16. acoustic energy passed by the tympanic membrane into the middle ear
  17. +100 to -150 daPa
  18. either the probe tip was misplaced, or there is an ear canal obstruction
  19. normal shape, normal peak admittance, excessively negative peak pressure.
    <-150 daPa
  20. less than -150 daPa
  21. this term reflects what the test measures; combination of the words "impedance" and "admittance"
  22. provided on the screen or print out.
    The Physical Volume of the ear canal beyond the probe
  23. opposition to flow of acoustic energy at the middle ear
  24. 7 months
  25. ...
  26. .6 to 2.5 ml
    -depends on age, gender, body size, etc
  27. structural defect of the ear, head or neck
    ear canal abnormalities
    tympanic membrane abnormalities
  28. admittance of sound at the peak of the tympanometry trace.
    in ml, cc or mmho

    shown by the hight of the tympanogram at its peak
  29. excessively middle ear system
    normal shape, peak pressure, HIGH peak admittance: >2.5 ml
    d: deep
  30. flat. no peak (abnormal shape)
    very low admittance; so little or no mobility
  31. Blood or effusion (drainage)
    inflammation
    excessive cerumen or foreign object
  32. the probe tone is constantly on and the Microphone can measure how much sound is absorbed/admitted, and how much is reflected into the ear canal
  33. Type B with abnormally large ear canal volume
  34. 0 daPa.
    admittance (passing of acoustic energy) declines as the air pressure moves away from 0, either positively or negatively.
  35. admittance of sound into the middle ear at varying degrees of positive and negative pressure in the external auditory canal.
  36. relative to the air pressure in the middle ear
  37. the TM is not intact
  38. normal middle ear function
    normal shape, peak pressure and peak admittance
  39. eustachian tube dysfunction.
    -non-specific finding
    -may reflect oncoming of otitis media
  40. Tympanometry
    Acoustic Reflex Thresholds
  41. check ear canal volume
  42. TM is intact, there's no ear canal obstruction, but there's little to no mobility of the TM
  43. stiffened middle ear system.
    normal shape, peak pressure, LOW peak admittance: < .3 ml
    s: shallow.
  44. otitis media with effusion
  45. equal on both sides (normal resting position), at 0 daPa