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Audiological Techniques 2 > Tympanometry > Flashcards

Tympanometry Flashcards

1
Q

What is the normal range for ME compliance?

A

0.3 - 1.6cm3

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2
Q

What is the normal range for ME pressure?

A

-50 - +50 daPa

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3
Q

What is the normal range for Ear Canal Volume?

A

0.6 - 2.5cm3

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4
Q

What are the normative calibration volumes?

A

Cavity Acceptable value
• 0.5cm3 • 0.5cm3
• 2.0cm3 • 1.9 - 2.1cm3
• 5.0cm3 • 4.8 - 5.2cm3

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5
Q

What connects the middle ear to the nasopharynx?

A

Eustachian tube - also known as the auditory tube

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6
Q

What equalises the pressure between the outside environment and the ME?

A

Eustachian tube

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7
Q

What are the 3 components of a tympanometer probe?

A

• Loudspeaker
• Microphone
• Pump

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8
Q

What are the two types of probe tips?

A

Mushroom and Umbrella

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9
Q

What are 4 ABSOLUTE contraindications for Tympanometry?

A

• Otorrhea/Blood
• Acute Otitis Media (red bulging TM)
• Foreign Body (except grommet NB: must be sufficient time post surgery)
• Ear Surgery within last 2 months (unless ENT surgeon agrees)

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10
Q

What are some of the CAUTIONARY contraindications for Tympanometry?

A

• Wax
• Partial Stenosis
• Comfort/Tenderness or Soreness
• Ear Surgery more than 2 months ago
• Any previous ossicular surgery or eardrum reconstruction
• Testing under general anaesthetic

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11
Q

If the graph shows abnormal ME compliance but normal ECV what could that mean?

A

Otitis media with effusion (OME) e.g., glue ear

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12
Q

If the ECV is high and ME compliance is abnormal what could that mean?

A

Perforation or grommet in-situ

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13
Q

If the ECV is low what could that mean?

A

Occluding body
Wax/foreign object

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14
Q

If the graph shows abnormally high ME pressure then what could this mean?

A

Possible Eustachian Tube dysfunction or retracted TM

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15
Q

If the ME pressure is too low then what could this suggest?

A

ME too compliant such as ossicular chain dislocation

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16
Q

If the ME pressure is too low and the ME compliance produces a shallow curve, then what could that mean?

A

Suggest possible Otosclerosis or stiffened TM

17
Q

Describe Tympanometry

A

Assesses the impedance of the Ear drum to the ME
Objective test - no pt cooperation needed

18
Q

Which tone stimulus is used in adults?

A

Pure tone
226kHz

19
Q

How does wideband tympanometry differ to conventional?

A

More frequencies can be used to measure the movement of the ME
Click stimulus is used instead of a tone
Maybe more helpful in detecting different pathologies

Audiological Techniques 2 (6 decks)

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