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COMD 3700 Exam 4 Latest Update
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COMD 3700 Exam 4 Latest Updatewhat is immittance testing? - Answer It is used to diagnose and evaluate the status of
the middle ear and inner ear
It measures tympanic membrane impedance, admittance and compliance
Immittance testing uses _______ and _______ on the outer and middle ear. - Answer
pressure and movement
Immittance Testing Equipment - Answer 1. Miniature loudspeaker that produces a pure
tone (referred to as a probe tone)
2. Monitor microphone- picks up sound and converts to electrical signal
3. Pressure pump and manometer
4. Ipsilateral reflex loudspeaker
5. Probe tip
What is a manometer? - Answer it quantifies air pressure within the ear canal
Which instrument of immittance equipment creates a hermatic seal? - Answer probe tip
Which instrument in immittance testing is used to monitor the probe sound in the ear
canal? - Answer Monitor microphone
Ipsilateral reflex loud speaker - Answer measure acoustic reflex testing
T/F: The monitor microphone measures the incidence wave introduced to the speaker,
and the reflective wave as it returns from the tympanic membrane. - Answer True
What level of sound does the probe tone loud speaker produce? - Answer 85 dB SPL at
226 Hz
what is tympanometry? - Answer An electronic and acoustic measurement technique
used to rule out outer and middle ear disorders
T/F: Immittance testing should be done only AFTER an otoscopy. - Answer True
Typanogram configurations (3) - Answer Pressure, compliance, volume
Which tympanogram configuration represents the x-axis? - Answer Pressure
Which tympanogram configuration represents the y-axis? - Answer Compliance
If the TM pushes away from you, it means the pressure is ___________. - Answer positive
If the TM pulls toward you, it means the pressure is ___________. - Answer negative
, If the volume of the ear is particularly large, this means ________. - Answer There is a
perforated TM or open PE tube.
If the volume of the ear is particularly small, this means ________. - Answer There is otitis
media or excessive wax.
Normal ear canal volume for a child is _________. - Answer 0.3 to 1.0
Normal ear canal volume for an adult is _________. - Answer 1.0 to 2.0
Normal range of pressure peak is _________. - Answer -150 to +50 daPa (-200 is
borderline)
Abnormal results of As are indicative of what conditions? (4) - Answer 1.
Tympanosclerosis
2. Ossicular fixation
3. Scarred (plaque covered) TM
4. Hearing loss
Type A Tympanogram - Answer Normal shape
Intact eardrum
Functioning Eustachian tube
Normal muscles and ligaments
No outer or middle ear pathology
What does a Type A tympanogram look like? - Answer
Type As Tympanogram - Answer S = Shallow or Stiff
Normal pressure
Low Compliance
Ossicular Fixation
Tympanosclerosis
also referred to as "glue ear"
What does a Type As tympanogram look like? - Answer
Type Ad Tympanogram - Answer D = Deep or Disarticulated or Discontinuous
Normal Pressure
Normal ECV
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