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AUDE 5450 - Amplification 1 > Couplers > Flashcards

Couplers Flashcards

1
Q

What material is recommended for a rigid pinna?

A

Soft material

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2
Q

What material is recommended for a soft/floppy pinna?

A

Hard material

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3
Q

What are some things we need to consider when fitting a pediatric patient?

A

Hygiene, activities, insertion, and growth

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4
Q

How often will kids up to the age of 4 get a new earmold?

A

Every 3 months

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5
Q

What is chosen as a last resort for its hypoallergenic properties?

A

Polyethylene

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6
Q

What is soft vinyl used for?

A

Infants
Firm ear texture
High gain devices

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7
Q

What is hard vinyl used for?

A

Older adults with dexterity issues
Facial flex problems (requires tight seal of aperture)

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8
Q

What are some disadvantages of vinyl?

A

Shrinks, hardens, and discolors quickly
Polishing requires toxic solvent with 24 hr drying time

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9
Q

What does vinyl feel like?

A

Soft but not grippy

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10
Q

What is silicone typically used for?

A

Pediatric
High gain devices
Allergies
Facial flex problems

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11
Q

What does silicone feel like?

A

Soft and grippy

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12
Q

What are some disadvantages of silicone?

A

Grippy material can cause blisters or increased discomfort
Difficult to modify
Tubing cannot be glued (requires tube locks)
Costs slightly more

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13
Q

What is platinum cure silicone?

A

Most popular type
Hardness varies from Shore A 25 to Shore A 60
Glossy or matte
Known for longevity
Modification requires special tools

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14
Q

What is heat cure silicone?

A

Better choice when high precision is needed for intricate details (power BTE hearing aids)
Provides a superior seal

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15
Q
A
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16
Q

What is lucite commonly used for?

A

Adults
Mild to severe loss
Floppy pinna

17
Q

What are some disadvantages of lucite?

A

Will not compress to move beyond narrow areas
Increased risk of feedback with movement (creates gaps)
Potential risk of injury if hit

18
Q

What is a combination mold?

A

Hard material on the outside for the concha
Use soft, semi-soft, or pliable materials for the canal
Provides a stronger seal

19
Q

What are some reasons for selecting a style?

A

Retention
Aperture seal
Cosmetics
Vent size needs

20
Q

Is output dependent on the acoustic seal?

A

Yes

21
Q

Can jaw movement impact the acoustic seal?

A

Yes

22
Q

What decisions can the movement of the canal impact?

A

Material
Anti-tragus or cymba concha retention points

23
Q

Are most custom molds equal in their fitting ranges?

A

Yes

24
Q

What is the primary purpose of a full shell mold?

A

Max retention and acoustic seal
High output for severe to profound losses

25
Q

What is the purpose of a skeleton mold?

A

Maximizes retention and acoustic seal
Offers comfort as the concha bowl remains exposed to air
Decreases moisture accumulation
Inconspicuous
Mild to severe losses

26
Q

Why would a semi-skeleton be used?

A

For insertion ease

27
Q

Is deep insertion (2 mm beyond second bend) required for smaller customs?

A

Yes

28
Q

What is the purpose of a canal mold?

A

Cosmetic
Lowest degree of acoustic seal

29
Q

What is the purpose of a canal lock?

A

Cosmetic with retention lock
Improved retention

30
Q

What is the purpose of a half shell?

A

Ease of insertion
Retention
Fills half of concha

31
Q

Can canal, canal lock, and half shell molds all accommodate mild to severe losses if they go beyond the 2nd bend?

A

Yes

32
Q

When should an open dome be used?

A

High frequency loss with normal hearing up to 1500 Hz

33
Q

When should a closed or tulip dome be used?

A

Mid freq amplification
Requires hearing thresholds better than 40 dB HL below 1 kHz

34
Q

When should a power dome be used?

A

Some amplification in mid to lows
Requires thresholds to be better than 40 dB HL below 1 kHz

AUDE 5450 - Amplification 1 (14 decks)

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