Potpourri
All immittance
Challenges with Assessment
Disorders
More Disorders
100
An impairment by air conduction (pure tone thresholds), but normal responses by bone conduction.
What is conductive hearing loss?
100
A dynamic objective test of middle ear system function.
What is tympanometry?
100
This represents an increase of sound when the external auditory meatus is covered, and the skull is vibrated with an oscillator.
What is the occlusion effect?
100
A progressive, high frequency sensorineural hearing loss that is associated with advancing age.
What is presbycusis?
100
Patients with this problem may have episodic vertigo, as well as fluctuating sensorineural hearing loss and tinnitus.
What is Meniere's disease?
200
This pattern of unmasked responses on an audiogram is almost a mirror image of the better ear, and represents cross-hearing.
What is a shadow curve?
200
This quantity is the reciprocal of admittance.
What is impedance?
200
This is presumed to be 0 dB regardless of placement on the head.
What is interaural attenuation for bone conduction?
200
This disorder presents as a narrowing of the external auditory canal, with a conductive hearing loss of varying degree.
What is stenosis?
200
An inflammation or infection of the middle ear, showing positive pressure on a tympanogram.
What is acute otitis media?
300
This muscle is responsible for the acoustic reflex, and is innervated by cranial nerve VII (facial nerve).
What is the stapedius muscle?
300
This parameter is measured by the height of the peak in tympanometry and is stable for most people.
What is static admittance?
300
What transducers are least likely to cause a problem with cross-hearing?
What are insert earphones?
300
It may cause conductive hearing loss, even a perforation of the tympanic membrane, caused by air pressure changes descending in a plane.
What is barotrauma?
300
Demonstrated by immittance findings that show a type "B" tympanogram, large physical volume and absent acoustic reflexes.
What is a tympanic membrane perforation? Or what are patent (open) pressure equalization tubes?
400
This occurs at high levels of stimulation through the bone oscillator, mostly at high test frequencies (2000, 4000).
What is radiation?
400
This is demonstrated with a type C tympanogram, and may ormay not be associated with middle ear fluid.
What is Eustachian tube dysfunction?
400
This aspect of a tympanogram is measured at 50% of the static admittance peak, and refers to how wide the peak is (in pressure terms).
What is gradient?
400
A pocket or cyst filled with keratin and cholesterol in the middle ear cavity, most often causing conductive hearing loss.
What is a cholesteatoma?
400
A progressive disorder, characterized by an overgrowth of bone within the middle ear near the stapes footplate.
What is otosclerosis?
500
Native American descent, day care settings, second-hand smoke exposure
What are risk factors for otitis media?
500
An electrophysiological response to sound that is sensitive to the effects of cochlear AND conductive hearing loss.
What is the acoustic reflex?
500
Damage to the auditory system, usually acquired over a period of time, due to excessively high sound levels.
What is noise induced hearing loss?
500
The layman's term for this is "glue ear".
What is mucoid otitis media?
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