Written COMP

Question 1

If you are looking at an ABR for retrocochlear and conductive, how do you tell the difference?

Answer 1

You can not tell from just the graph, you must do bone conduction or reflexes. If they add bone to the graph and it falls into the gray range, then it would be a conductive hearing loss because of the air-bone gap.

Question 2

Tell me how latency and amplitude change with intensity (ABR) ?

Answer 2

Louder Intensity = higher amplitude & shorter latency
Smaller Intensity = shorter amplitude & longer latency

Question 3

The latency of wave 5 between ears should differ by no more than?

Answer 3

0.2 to 0.4 msec

Question 4

Why is latency important?

Answer 4

it is the most robust parameter in the clinical interpretation of the ABR

Question 5

The ABR is not sensitive …

Answer 5

to all central nervous system disorders, it is only sensitive from the ear to the brainstem