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IHS Questions- For License Prep Verified 100% Correct.

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IHS Questions- For License Prep Verified 100% Correct. The adult ear canal: Rises upward and forward then descends to the drum The isthmus is: Where the canal narrows to enter the temporal bone The pinna and the external canal together: -Gather and reinforce accoustical signals -With the irregular shape of the auricle, cause increases and decreases at different frequencies as the sound arrives at the ear. -Forms a resonating tube. The average resonant frequency of the ear canal plus concha is: 2700 Hz. The dividing line between the external ear and the middle ear is the: Tympanic membrane. The ear canal contains: Cilia, ceruminous glands. sebaceous glands. The vagus nerve (Xth cranial) is found: Along the bottom of the ear canal. These are parts of the tympanic membrane: Pars tensa, Pars flaccida, Umbo. An otoscopic inspection should reveal: A clear view of the white tympanic membrane. These are parts of the pinna: Tragus, intertragal notch, triangular fossa. Atresia refers to: A closure of the external auditory canal. Perforation of the eardrum can be caused by: -An infection -A fracture of the temporal bone -A nearby explosion.

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IHS Questions- For License Prep Verified
100% Correct.
The adult ear canal:
Rises upward and forward then descends to the drum


The isthmus is:
Where the canal narrows to enter the temporal bone


The pinna and the external canal together:
-Gather and reinforce accoustical signals
-With the irregular shape of the auricle, cause increases and decreases at different frequencies as the
sound arrives at the ear.
-Forms a resonating tube.


The average resonant frequency of the ear canal plus concha is:
2700 Hz.


The dividing line between the external ear and the middle ear is the:
Tympanic membrane.


The ear canal contains:
Cilia, ceruminous glands. sebaceous glands.


The vagus nerve (Xth cranial) is found:
Along the bottom of the ear canal.


These are parts of the tympanic membrane:
Pars tensa, Pars flaccida, Umbo.


An otoscopic inspection should reveal:
A clear view of the white tympanic membrane.


These are parts of the pinna:
Tragus, intertragal notch, triangular fossa.


Atresia refers to:
A closure of the external auditory canal.


Perforation of the eardrum can be caused by:
-An infection
-A fracture of the temporal bone
-A nearby explosion.


These are types of hearing loss:

,-Conductive
-Central
-Sensorineural


Conductive losses may be caused by:
A prolapsed canal
Impacted cerumen


Which surgical technique repairs the tympanic membrane?
Myringoplasty


A cholesteatoma can be described as:
A pouch of skin filled with epithelial debris.


When an excess of cerumen or a blockage of cerumen is detected, the hearing aid specialist should:
Refer the patient to a physician.


A swollen ear may be caused by:
-Eczema
-Otitis externa
-Dermatitis


Tympanosclerosis may be described as:
Calcium deposits.


A tympanic membrane perforation may cause a:
Conductive loss.


Theoretically, the increase in sound pressure provided by the middle ear structure is about:
27 dB.


The footplate of the stapes fits into the:
Oval window.


A type "A" tympanogram would indicate:
Normal pressure and compliance.


The difference in area size between the tympanic membrane an the footplate of the stapes increasing
the sound pressure at the footplate is :
The transfer function or aerial ratio.


The middle ear cavity contains:
Annular ligaments, malleus, stapes and tensor tympani.

, The middle ear system is often referred to as:
An impedance matching transformer.


The middle ear cavity, as a transducer changes energy from one form to another. The energy changes
from:
Acoustic energy to mechanical energy to hydraulic energy.


The middle ear muscles contract, resulting in:
An acoustic reflex.


The Eustachian tube begins in the lower portion of the tympanic cavity and ends at the:
Nasopharynx.


The Eustachian tube of a child is:
Straight, short, horizontal.


A cholesteatoma:
-Occurs in the middle ear
-May perforate the eardrum
-Is usually accompanied by a constant odorous discharge.


Change in either stiffness or mass occur when the normal middle ear function is altered by disease or
trauma causing:
A feeling of stuffiness or a complaint of hearing in a barrel.


Otosclerosis:
Occurs more often in women than men
Occurs more often in Caucasians than other races
Appears to be inherited


Most dysfunctions of the outer or middle ear cause a:
Conductive loss.


Otitis media may occur with:
Fluid in the middle ear.


A plastic or steel strut replaces the stapes during a:
Stapedectomy.


Treatment for chronic otitis media may include:
-Antibiotics
-Inflation of the Eustachian Tube
-Myringotomy


A radical mastiodectomy incudes removal of:

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