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HEAR1002 > Week 3: Speech Audiometry, Tympanometry and Ear Canal Volume > Flashcards

Week 3: Speech Audiometry, Tympanometry and Ear Canal Volume Flashcards

1
Q

What does SRT stand for?

A

Speech Recognition Threshold or Speech Reception Threshold

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2
Q

Define SRT

A

minimum hearing level (softest intensity) in decibels (db HL) at which an individual can identify and repeat words (two-syllables) correctly

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3
Q

In terms of SRT, two syllables are pronounced with?

A

Equal stress

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4
Q

SRT is related with?

A

PTA

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5
Q

What does PTA stand for?

A

Pure-Tone Average

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6
Q

How do you calculate PTA?

A

the average of AC thresholds obtained at 500, 1000, and 2000 Hz in a pure-tone audiometry test

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7
Q

The difference between SRT and PTA is no more than 6 dB, the accordance/agreement is said to be?

A

GOOD

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8
Q

The difference b/w SRT and PTA is within 7 to 12 dB, the accordance/agreement is said to be?

A

FAIR

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9
Q

The difference b/w SRT and PTA is 13 dB (or more), the accordance/agreement is said to be?

A

POOR

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10
Q

What does WRS stand for?

A

Word Recognition Score

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11
Q

Define WRS

A

the percentage of correctly identified, and repeated words (single-syllable/monosyllabic words) from phonetically balanced word list at the comfortable listening level

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12
Q

WRS can be used to?

A

aid in the diagnosis of the site (location) of the disease/disorder (cochlea vs cochlear nerve)

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13
Q

What is tympanometry?

A

a test used to detect disorders/diseases of the tympanic membrane and middle ear

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14
Q

The word tympanometry is compounded from the Greek word tympanon, what does the word mean?

A

tympanic membrane and metrein (meaning to measure)

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15
Q

What is typanometer?

A 
An air pump (which creates either +/- air pressure within the external ear canal)
A pure tone generator 
A microphone (which picks up the reflected waves as its turns from the tympanic membrane)
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16
Q

daPa is the measurement for?

A

pressure (middle ear pressure)

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17
Q

ml is the measurement for?

A

compliance (tympanic membrane mobility)

18
Q

Describe the pressure and compliance of the Type A Tympanogram

A

Normal pressure: +50 to -100 daPa

Normal compliance: 0.3 ml to 1.6 ml

19
Q

Type A Tympanogram is seen in patients who have?

A

Normal middle ear pressure and tympanic membrane mobility

20
Q

Describe the pressure and compliance of the Type As Tympanogram

A

Normal pressure: +50 to -100 daPa

Low (decreased) compliance: less than 0.3 ml

21
Q

Type As Tympanogram is seen in patients who have?

A

Otosclerosis (the stapes has become partially or completely fixed/immobilized, and so the ossicular chain)

22
Q

Describe the pressure and compliance of the Type Ad Tympanogram

A

Normal pressure: +50 to -100 daPa

High (increased) compliance: more than 1.6 ml

23
Q

Type Ad Tympanogram is seen in patients who have?

A

Atrophic Tympanic Membrane (a very thin and flaccid tympanic membrane)
Ossicular Chain Discontinuity (the separation of the joint connecting two middle ear bones)

24
Q

Describe the pressure and compliance of the Type C Tympanogram

A

Negative pressure: significant negative middle ear pressure, more negative than -100 daPa
Normal compliance: 0.3 to 1.6 ml

25
Q

Type C Tympanogram is seen in patients who have?

A

Eustachian Tube Disfunction

26
Q

Describe the pressure and compliance of the Type B Tympanogram

A

Flat (with no discernible peak of pressure)

27
Q

Type B Tympanogram is seen in patients who have?

A

Otitis Media with Effusion (fluid within the tympanic cavity)
Tympanic Membrane Perforation
Typanosotomy Tube (middle ear ventilation tube)
Impacted Earwax (earwax that blocks the external ear canal)
Atelectasis (tympanic membrane pushed towards/sucked inside the tympanic cavity)

28
Q

What does ECV stand for?

A

Ear Canal Volume

29
Q

Define ECV

A

an estimate (of air) medial to probe

30
Q

What does ECV include?

A

the volume between the probe too and the tympanic membrane
the volume of the external ear canal and the middle ear space
Normal values in adults (0.7 to 2.0 cm3)

31
Q

What does normal ECV mean?

A

when the volume is between the probe tip and the tympanic membrane (when the tympanic men is intact)

32
Q

What does large ECV mean?

A

when the volume is between the external ear canal and the middle ear space
(when the tympanic membrane is perforated or there is a tympanostomy tube)

33
Q

What does small ECV means?

A

when the volume is between the probe tip and the impacted earwax

34
Q

Describes Otitis Media with Effusion

A

fluid within the tympanic cavity (serous otitis media, mucous otitis media)

35
Q

What are the ECV and tympanogram types of Otitis Media with Effusion?

A

ECV: normal
Tympanogram: Type B

36
Q

Describe Tympanic Membrane Perforation

A

perforation in the tympanic membrane (holes)

37
Q

What are the ECV and tympanogram types of Tympanic Membrane Perforation?

A

ECV: large
Tympanogram: Type B

38
Q

Describes Typanostomy Tube

A

it provides ventilation of the middle ear tympanic cavity by allowing the free passage of air through the tympanic membrane

39
Q

What are the ECV and tympanogram types of Tympanostomy Tube?

A

ECV: large
Tympanogram: Type B

40
Q

Describes Impacted Earwax?

A

Earwax that blocks the external ear canal

41
Q

What are the ECV and tympanogram types of Impacted Earwax?

A

ECV: small
Tympanogram: Type B

42
Q

What is the relationship between tympanometry and ear canal volume?

A

They are objectives test that does not require behavioral responses from patients
Both tests are very useful in the diagnosis of the tympanic membrane and middle ear diseases

HEAR1002 (7 decks)

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