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Flashcards in Week5.1 Deck (13)
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1
Q

What’s the difference between traditional and non-traditional fittings?

A

TRADITIONAL: similar HL in both ears, can accommodate “traditional” hearing aid options (e.g. ITE, BTE, etc.)

NON TRADITIONAL: something other than traditional hearing aid required in one or both ears

2
Q

What are three options for non-traditional amplification?

A

1) Cochlear implant (bilateral)
2) Cochlear implant (unilateral), traditional in other ear
3) Hybrid device
4) CROS/BiCROS
5) Bone Anchored Device
6) Middle Ear Implant

3
Q

Who is a candidate for non-traditional amplification?

A

1) severe/profound loss in 1 ear, no loss or addable in the other
2) severe-profound HL bilaterally
3) Outer ear/middle ear deformities
4) Conductive hearing loss
5) Significant asymmetrical HL
6) Sudden SN HL

4
Q

Talk to me about cochlear implants.

A
  • Most recognizible NTA option
  • surgically implanted one ear at a time
  • do not have ear mold
  • provide direct electrical stimulation to auditory nerve (bypassing damaged hair cells)
5
Q

Who is a candidate for cochlear implants?

A

CHILD: Bilateral severe/profound SNHL, must have tried traditional with minimal benefit, short-term auditory deprivation (1-4 years), functional auditory nerve

ADULT: good post-lingual skills, participate in post-surgery rehab, functioning auditory nerve

6
Q

Talk to me about hybrid cochlear implants

A
  • Combination of traditional HI & C.I.
  • for those with residual hearing at cochlea
  • severe HF HL but good LF hearing
  • stimulates bone & cochlear fluids, & electrical signals directly stimulate auditory nerve
  • no problems with feedback, HF info sent directly through electrodes
7
Q

Talk to me about bimodal fitting

A
  • Hearing instrument in 1 ear, cochlear implant in the other
  • asymmetrical HL, each ear benefits from different thing
8
Q

Talk to me about CROS

A
  • Contralateral Routing of Signal
  • apptopriate w/normal hearing on one side and none on the other
  • mic with transmitter sits on poor side
  • receiver sits on better side, no mic
  • signal transmitted wirelessly from poor to good
  • eliminates head shadow effect
  • improves SNR
9
Q

Talk to me about BiCROS

A
  • Bilateral contralateral routing of signal
  • hearing loss in one ear, unaidable loss in other
  • signal mixed b/n HI and CROS
  • microphone in both hearing instruments
  • transmitter in unaidable ear sends info to receiver in aidable ear
10
Q

How is a bone anchored device different from normal hearing?

A

In normal hearing, sound goes through ear canal, into middle ear and vibrates fluid & hair cells of cochlea. In BAHA, apply force to the skull to vibrate the cochlea

11
Q

What are the various parts of a BAHA

A

1) Sound processor: capture sounds via mic, turn into vibrations
2) Abutment: transfers sound into mechanical vibrations from sound processor to implant
3) Titanium implant: placed in bone behind ear, transfers vibrations through bone directly to the cochlea

12
Q

Who is a candidate for a BAHA?

A
  • External ear abnormalities
  • Constant discharge
  • Malformation of ossicles
  • Single-sided deafness
  • Large air-bone gap
  • Unilateral HL
  • One functional cochlea
13
Q

Talk to me about middle ear implants.

A
  • A processor, receiver, & implant replace ME
    - processor: mic + amplifier + battery
    - receiver: produce electrical signal
    - implant: set against cochlea, replace ossicles