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CD 443 Exam 3: Questions & Complete Solutions (A+)
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CD 443 Exam 3: Questions & Complete Solutions (A+)
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CD 443 Exam 3: Questions & Complete Solutions (A+)Audiologic Evaluation outside the booth Right Ans - 1. Case history
2. Otoscopy
3. Tympanometry
Audiologic Evaluation inside the booth Right Ans - 1. SDT/SRT
2. Word recognition
3. Pure tone air conduction & bone conduction
Middle ear Right Ans - o Ossicles
o Ear drum
o Eustachian tube
o Tympanic cavity
Tympanometry tells us Right Ans - how these things are working or not
working
What happens during tympanometry Right Ans - o The probe puts a sound
in our ear (pressure)
o It sees if ear drum moves back and forth
Two kinds of audiology test Right Ans - Behavioral and objective test
Behavioral test and example Right Ans - Require the patient's active
cooperation and a behavioral response
• e.g., pure tone threshold (air conduction & bone conduction), SRT/SDT,
word recognition
Objective test and example Right Ans - • Require some cooperation but no
behavioral response •
e.g., tympanometry, acoustic reflexes, otoacoustic emissions (OAEs), auditory
brainstem responses (ABR)
tympanometry is.... Right Ans - ...a test of middle ear function
• By measuring how sound is transmitted through middle ear (indirectly) we
can evaluate the functional properties of the middle ear
, What can tympanometry be affected by? Right Ans - the findings of
otoscopy
- ear drum perforation
-occluding wax
- foreign bodies
-malformed ear canal
Tympanometry is not.... but it can... Right Ans - A hearing test
But it can..
• ...help identify middle ear conditions that can cause hearing loss
• ...help distinguish between sensorineural and conductive causes
• ...be a very reliable test for detecting otitis media (middle ear fluid)
Types of tympanograms Right Ans - Type A
Type B
Type C
Type A Right Ans - -Normal outer ear and middle ear function
- Expected audiogram = normal hearing or sensorineural hearing loss
Type B Right Ans - • Also known as "flat"
• Typically suggests an obstructive condition (ex. wax, fluid, TM perforation,
tubes)
-No tympanic membrane movement
- Expected audiogram = conductive or mixed hearing loss
Type C Right Ans - Negative middle ear pressure
• Ear feels "stopped up"
• Typically suggests Eustachian tube dysfunction
-Significant middle ear pressure
-Expected audiogram = anything is possible!
- Looks like A but shifted way over to left (-100 or less)
Tymapnometry is excellent for testing Right Ans - otitis media with
effusion
Does tympanometry have to be completed in quiet room? Right Ans - No
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