VRA Flashcards
1
Q
Initial VRA should include
A
- Ear-specific AC @ 2k, 500 & 4kHz plus 1kHz if required (same rules apply as ABR)
- Ear specific MLV thresholds (SDT)
- BC if required
- DPOAE & noise thresholds @ nominal F2 of 1.5,2,3,4
- Tymp & ipsi ART
2
Q
Target population
A
6-30months with PCHL, or any referral babies
3
Q
Transducer
A
Inserts unless anatomically contraindicated (in which case use TDH headphone)
4
Q
SF normal. What’s next?
A
Verify normal hearing by running DPOAE in each ear and immittance testing (to rule out ANSD)
5
Q
SF elevated. What’s next?
A
Book appt to get separate ear info.
If HL is confirmed, ensure separate ear info is obtained prior to HA fitting which may require GA ABR.
6
Q
Stimulus tone & freq.
A
NBN pulsed
2-500-4kHz
7
Q
Threshold procedure
A
Appendix 8
8
Q
Auditory dys-synchrony inference from VRA
A
Normal DPOAE + reliable VRA =>55dB —> probable ANSD due to days-synchrony.
Should do click ABR with GA
9
Q
Minimum testing level for normal hearing for VRA
A
20dB HL
