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IHS Practical Exam questions with verified answers.
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IHS Practical Exam questions withverified answers
SECTION I: Tympanometry
What does tympanometry measure? - .......🔷ANSWERS🔶......✔✔ middle ear function/mobility as
reflected by TM mobility/compliance, ossicular chain movement and the integrity of the middle ear
space.
Tympanometry is aka? - .......🔷ANSWERS🔶......✔✔ Immitance audiometry
How does tympanometry work? - .......🔷ANSWERS🔶......✔✔ probe is inserted* pressure pump
continouosly changes the EEC pressure from + to -
When is the ME system it's most compliant and functioning optimally?
- .......🔷ANSWERS🔶......✔✔ When the EEC pressure is at or near atmospheric pressure
What does the height of a tympanogram represent? - .......🔷ANSWERS🔶......✔✔ The efficiency
with which the ME structures transmits sound to the cochlea.
Compliance - .......🔷ANSWERS🔶......✔✔ mobility
The ease with which acoustic energy flows through the ME
Point of maximum compliance (PMC) - .......🔷ANSWERS🔶......✔✔ the highest point of
compliance on a tymp
How does a tympanogram display compliance? - .......🔷ANSWERS🔶......✔✔ As a function of
PRESSURE
,What is the same physiologic response as the stapedial reflex? - .......🔷ANSWERS🔶......✔✔ Middle
ear muscle reflex (MEMR) OR acoustic reflex
Even though tympanometry/Imittance audiometry doesn't provide information for determing
hearing loss, what can it do? - .......🔷ANSWERS🔶......✔✔ 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) - .......🔷ANSWERS🔶......✔✔ Impedence
What type of energy flow can an infected middle ear have? - .......🔷ANSWERS🔶......✔✔ high
impedence
Negative pressure pulls the TM... - .......🔷ANSWERS🔶......✔✔ laterally
Positive pressure pulls the TM.... - .......🔷ANSWERS🔶......✔✔ medially
What does the vertical axic on the tympanogram represent? - .......🔷ANSWERS🔶......✔✔
compliance/mobility
What are the 5 types of tympanometric shapes? - .......🔷ANSWERS🔶......✔✔ 1. 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? - .......🔷ANSWERS🔶......✔✔ Low peak height with normal peak
pressure
consistent with the stiffness of the middle ear mechanism
, ex. otosclerosis
What's associated with Ad? - .......🔷ANSWERS🔶......✔✔ Abnormally high peak
Often shown with ossicular chain discontinuity
What's associated with B? - .......🔷ANSWERS🔶......✔✔ Fluid in the middle ear or cerumen
impaction
What's associated with C? - .......🔷ANSWERS🔶......✔✔ negative peak pressure
typically associated with eustachian tube disfunction
*Ear drum is wrapped around the ossicular chain
SECTION IV: Fitting Verification & ANSI specs - .......🔷ANSWERS🔶......✔✔
What are 2 types of tymps that are mistaken for Type B (flat tymps) - .......🔷ANSWERS🔶......✔✔ 1.
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 - .......🔷ANSWERS🔶......✔✔ real 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? - .......🔷ANSWERS🔶......✔✔ 1. Speech based (speech mapping)
2. Gain based (REIG) - the amount of amplification provided by the HA
How do you get REIG? - .......🔷ANSWERS🔶......✔✔ REAR - REUR (ear canal resonance)
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