ABA Cochlear Implants & Implantable Hearing Devices

Question 1

Which structure in the cochlea is the target for cochlear implant electrode array insertion?

Accepted Answer

Scala tympani

Answer

Scala vestibuli

Answer

Scala media

Answer

Organ of Corti

Question 2

What is the minimum unaided pure-tone average (PTA) criterion typically used for adult cochlear implant candidacy in the better-hearing ear?

Accepted Answer

70 dB HL

Answer

25 dB HL

Answer

40 dB HL

Answer

90 dB HL

Question 3

Which speech recognition score threshold is commonly used as part of adult CI candidacy evaluation?

Accepted Answer

Less than 60% on aided CNC word recognition

Answer

Less than 20% on aided CNC word recognition

Answer

Less than 40% on aided CNC word recognition

Answer

Less than 80% on aided CNC word recognition

Question 4

What does the term 'neural response telemetry' (NRT) or 'neural response imaging' (NRI) measure during cochlear implant programming?

Accepted Answer

The electrically evoked compound action potential of the auditory nerve

Answer

The impedance of each electrode contact

Answer

The acoustic stapedial reflex threshold

Answer

The cortical auditory evoked potential

Question 5

In cochlear implant programming, what does 'T-level' (threshold level) refer to?

Accepted Answer

The minimum level of electrical stimulation that produces a just-audible percept

Answer

The loudest comfortable level of electrical stimulation

Answer

The level at which acoustic tinnitus is masked

Answer

The impedance threshold for an electrode channel

Question 6

Which condition is considered a contraindication to cochlear implantation?

Accepted Answer

Absent or severely deficient auditory nerve (cochlear nerve aplasia)

Answer

Bilateral severe-to-profound SNHL

Answer

Age over 70 years

Answer

History of otitis media

Question 7

What is the primary advantage of a 'bimodal' fitting for a cochlear implant recipient?

Accepted Answer

Combines a CI in one ear with a hearing aid in the opposite ear to improve speech perception, especially in noise

Answer

Reduces the need for auditory rehabilitation

Answer

Uses two cochlear implants simultaneously for better localization

Answer

Provides bilateral electrical stimulation using a single internal device