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IHS Practical Exam Questions and Answers
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Exam of 15 pages for the course IHS at IHS (IHS Practical Exam)
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IHS Practical ExamSECTION I: Tympanometry - answer
What does tympanometry measure? - answer middle ear function/mobility as reflected
by TM mobility/compliance, ossicular chain movement and the integrity of the middle
ear space.
Tympanometry is aka? – answer Immittance audiometry
How does tympanometry work? - answer probe is inserted* pressure pump continuously
changes the EEC pressure from + to -
When is the ME system it's most compliant and functioning optimally? - answer When
the EEC pressure is at or near atmospheric pressure
What does the height of a tympanogram represent? - answer The efficiency with which
the ME structures transmits sound to the cochlea.
Compliance - answer mobility
The ease with which acoustic energy flows through the ME
Point of maximum compliance (PMC) - answer the highest point of compliance on a
tymp
How does a tympanogram display compliance? - answer As a function of PRESSURE
What is the same physiologic response as the stapedial reflex? - answer Middle ear
muscle reflex (MEMR) OR acoustic reflex
Even though tympanometry/Immittance audiometry doesn't provide information for
determine hearing loss, what can it do? - answer Supplemental to pure tone and speech
audiometry elevates the level of practice and professionalism to create a
COMPREHENSIVE exam
opposition to the flow of energy (definition) – answer Impedance
What type of energy flow can an infected middle ear have? - answer high impedance
Negative pressure pulls the TM... - answer laterally
Positive pressure pulls the TM.... - answer medially
, What does the vertical axic on the tympanogram represent? -
answercompliance/mobility
What are the 5 types of tympanometric shapes? - answer1. A - normal
2. As - shallow/low compliance
3. Ad - deep/high compliance
4. B - flat
5. C - normal compliance but with - ear pressure
What is associated with As? - answerLow peak height with normal peak pressure
consistent with the stiffness of the middle ear mechanism
ex. otosclerosis
What's associated with Ad? - answerAbnormally high peak
Often shown with ossicular chain discontinuity
What's associated with B? - answerFluid in the middle ear or cerumen impaction
What's associated with C? - answernegative peak pressure
typically associated with eustachian tube disfunction
*Ear drum is wrapped around the ossicular chain
SECTION IV: Fitting Verification & ANSI specs - answer
What are 2 types of tymps that are mistaken for Type B (flat tymps) - answer1. a tymp
that shows an abnormally large ECV (ear canal volume)* should be labelled as
"atypically large ECV"
2. a tymp that shows an abnormally small ECV*should be suspected when the ECV is
0.1 or 0.2 ml
What do the following acronyms stand for?
REAR/REUR/REIG/RESR - answerreal ear aided response/real ear un-aided
response/real ear insertion gain/real ear saturated response (operating at MPO)
What are 2 types of REM? - answer1. Speech based (speech mapping)
2. Gain based (REIG) - the amount of amplification provided by the HA
How do you get REIG? - answerREAR - REUR (ear canal resonance)
What is Speech mapping? - answerA fitting verification that uses a recorded speech or
speech-like signal to map the current HA settings to the prescriptive goals.
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