9/6/2013

9/6/2013

Answers:

On an audiogram the symbol X refers to...?

A) L ear masked air conduction 
B) R ear masked bone conduction 
C) L ear masked bone conduction 
D) R ear unmasked air conduction 
E) L ear unmasked air conduction

Describe the Schwabach's tuning fork test.

The tuning fork is placed on a patient's mastoid and when the tone decreases such that the patient cannot hear the tone, the physician quickly places it on his own mastoid. Assuming that the doctor has normal hearing if they can hear the tone then it indicates that the patient has SNHL.

MC Question:

Moderate hearing loss is diagnosed at what hearing threshold?
A) 10-30 db 
B) 20-40db 
C) 30-50db 
D) 40-60db

Free Response Question:
What is the classic appearance of conductive hearing loss on an audiogram?

Quick Facts:
Types of Tympanograms:  
-Type A = normal peak
-Type As=TM stiffer w/ normal middle ear pressure (otosclerosis) 
-Type Ad= TM more flaccid w/ normal pressure (ossicular discontinuity) 
-Type B=flat tympanogram, nonmobility indicated (perf or effusion) 
-Type C= peak in negative pressure range (eustachian tube dysfunction)