Audiology Final Exam

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Audiology Final Exam
2011-05-02 15:15:57
Audiology Final

the final exam for audiology
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  1. Normal Ymmho
    • .2-1.7
    • Essentailly how high.low the peask is on the vertical plane (compliance)
  2. Normal Dapa
    • -150 -+100
    • essentailly where the peak of they tymp is located on the horizontal plane
  3. Normal ECV
    • .3 - 2.0
    • Equivalent ear canal volume
    • also cale Vea cm3
  4. If there is negative ear pressure the type is
  5. Fluid in the middle ear will show what type of tymp
  6. Conductive Hearing Loss comes from
    Middle ear
  7. Type C has normal _______ not normal ________
    Type C has normal HEIGHT not normal PRESSURE
  8. Type A tymp shows
    Normal middle ear function;greatest compliance at 0 dapa
  9. Type As typm shows
    Peak at or near 0 dapa, suggesting normal middle ear pressure, but the peak is SHALLOWER than type A

    -stapes may be become immobilized showing stiffness or being shallow
  10. Type As
    • 5.0= hole
    • 1.0= fluid
  11. Type Ad type shows
    may look like type A, but the amplitude of the curve is UNUSUALLY HIGH or the sides may not meed at all

    -Flaccidity of TM or seperation of ossicular chain
  12. Type C Tymp shows
    when the pressure falls below normal. TM most compliance with pressure in the canal is NEGATIVE

    -Excessive NEgative pressure may have an absent peak on sreen and become confused for a type B

    -Tymp is farther to the LEFT but normal height
  13. Type B tymp shows
    Middle ear space filled wit fluid. pressure introduced from probe cannot match the pressure of the fluid behind the TM

    • -abnormal height and pressure
    • -shows a flat line
  14. The floor of the middle ear contains the
    jugular bulb
  15. behind the anterior wall is the
    carotid artery
  16. behind the medial wall is the
    labyrinth (balance)
  17. Behind the posterior wall is the
    Mastoid Process
  18. The middle ear is connected to the
    Nasopharynx or ET
  19. In infants the ET is
    Shorter wider and more horizontal and remains open until about 6 months
  20. The air pressure in the middle ear mus match
    that of the EAC to keep the pressure equal
  21. This is honeycombed with hundreds of hair clees
    The mastoid
  22. the ________ of the malleus is embedded in the middle layer of the TM and extnds to the center of the TM of the ared of greatest retraction which is the ________
    • -manubrium
    • -umbo
  23. increased pressure and the lever action of the malleus resuld in a pressure increase of ____ times taht of an airbone transmisson alone
  24. a ___ db loss would result due to the air to fluid impeadance mismatch without the ossicles
  25. What contains a portion of the facial nerve and passes through the middle ear via medial wall
    Fallopian canal
  26. this is a branch of the facial nerve that varries information abou thte sensation of taste
    chorda typmani nerve
  27. name the two middle ear muscles and what they do
    • Stapedius Muscle- attaches to the neck of the stapes
    • Tensor tympani muscle- inserts in themanubrim of the malleus and contraction may cause the TM to become tense--> trigeminal nerve
  28. Many middle ear disorders arise from poos function of the
  29. what is valsalva
    auto inflate the et by increase pressure on forced expiratoin with nostrils held shut
  30. what is the Toynbee maneuver
    accomplishes ET opening when the patient closes the jaw hodls the nostrils shut and swallows
  31. Suppurative otitis media
    • -MRSA
    • -oftent he infection is leterally blown through the ET by a stifled sneeze or by blowing the nose too hard
    • -gain access from the ET
  32. Superative meaning-
  33. pus due to infection in the middle ear cannont escape and may invade the matoid causing
  34. 2 types of Chronic Supperative Otits Media
    • Chronic- long stnading duration of OM
    • Acute- develps rapidly and includes swelling redness and bleeding
  35. What is Serous Effusion of the Middle Ear
    • when fluids nomally secreted by the mucousu membrane lining of the middle ear may lterally be sucked into the middle ear space resulting is this
    • -reveals a type B tymp
  36. ______ is used to relieve the fluid pressure and the remaining fluid is suctioned out
    Myringotomy or myringostomy
  37. PE tubes
    • may be inserted to keep the TM patent
    • used for chronic OM
  38. Mucoucs otitis media aka
    • Glue Ear
    • when thick seretions accumulate in the middle ear
  39. when the tm has reuptured and imperfect healing results in calcium deponsits
  40. a foul smelling discharge that drains from the ears is called
  41. -results when the mastoid is chronically infected
  42. Surgical reconstruction of the middle ear auditory apparatus
    • Tympanoplasty
    • The simplest form of this is called myringoplasty
  43. During some chronic OM the bony convering of the fallopian canal becomes eroded,exposing the facial never to the disease process
    • Facial Palsy
    • Bell's Palsy may resuld causing a unilateral facil paralysis
  44. Patulous Eustachian Tube
    • Head in a barrel
    • when the ET is chronically open
  45. otosclerosis
    • causes the footplate to become partially fixed limiting the transmission of sound to the inner ear
    • herediatary in 70% of cases
  46. when patient with CHL feel that speech is easier to understand in the presence of background noise this is called
    Paracusis Willisii
  47. BC thresholds appear the worst at ____ Hz. This is refered to as ______ _______
    • 2000 Hz
    • Carhart's notch
  48. the actual removal of the stapes and a protheses is connected to the incus to replace the crura of the stapes is called
  49. the 3 systems of the inner ear
    • Visual-visual input
    • Proprioceptive- sense of touch
    • Vestibular- forces of gravity
  50. Name the 3 semicircular canals
    • Superior
    • Inferior
    • Horizontal
  51. the Vestibular Mechanis houses the ______ and _______ and contains ________
    • Utricle
    • Saccule
    • Perilymph
  52. utriculosaccular has _________ acceleration
    the SCC has___________ acceleration
    • Linear--> elevator or var movement
    • Angular--> increase/decrease of bodys revolutions
  53. the sensation of whirling or spinning and experience true turning is called_________ while a rapid rocking movement of the eyes is called_________
    • Vertigo
    • Nystagmus
  54. Scala vestibuli and scala tympani have ________ and scala Media has_______
    • Perilymph
    • Endolymph
  55. Order from top to bottom the auditory mechanism
    • 1 scala vestbuli
    • 2 Reissner's membrane
    • 3 scala media
    • 4 basilar membrane
    • 5 scala tympani
  56. Organ of Corti
    end organ of hearing
  57. Endolymph is high in __________ and low in ___________
    Perilymph is high in___________ and low in ____________
    • endolymph is high in potassim ions and low in sodium
    • perilymph is high in sodium ion and low in potassium ions
  58. movement of the stapes causes an up and own movement of the basilar membrane produced by the disturbance of endolymph.... this is called the
    Traveling wave theory
  59. Lowest frequency to which the ear responds
    20Hz at the apex
  60. a group of symptoms considered together for the diagnosis of a particular disorder
  61. RH factor
    when a baby's blood contains the protein molecule called the Rh factor
  62. if the hearing loss is more than 10dB there is a ____________ HL
    if the hearing loss is less than 10dB then it is a ____________ HL
    • Conductive
    • SNHL
  63. 0-25
    • nomal
    • mild
    • moderate
    • moderaly severe
    • severe
    • profound
  64. greater than a 20dB drop on a audiogram is
  65. Between 5-10 db on an audiogram it is a
  66. most comfortable loudness
  67. the difference between the speech recognition threshold and the unconforable loudness level is called
    Dynamic range