OthEAR
What is the difference between a conductive hearing loss and a mixed hearing loss?
Conductive: BONE IS NORMAL
Mixed: Bone is impaired ANd there is an ABG
Name 3 disorders that cause conductive hearing loss
Otitis media
Atresia
otosclerosis
ossicular chain disarticulation
tympanosclerosis
What is the best test for verification of a hearing aid fitting?
Real ear measures/speech mapping
What are the 2 possible pathologies associated with a type B tympanogram and how can you tell the difference?
Flat, type B
-ECV
Otoacoustic emission testing is an evaluation of what part of the auditory system?
Outer hair cells in cochlea
How would you calculate the presentation level for WRS?
PTA+40
What inheritance pattern is the most common for hearing loss?
(dominant, recessive, Xlinked, mitochondrial)
Recessive
How is cochlear implant candidacy determined?
-hearing test: severe-profound
-poor discrimination
-with MTSB speech tests
-medically
What type of tympanogram would a patient with otosclerosis likely have?
Type As (stiffening of the system)
Which wave in ABR is able to be tracked to find an individual's hearing threshold?
Wave V
What hearing test would be used for an 8 month old infant?
Visual reinforcement audiometry
Name two ototoxic substances
-aminoglycoside antibiotics
-chemotherapy (Cisplatin/Carboplatin)
-loop diuretics
-high dose aspirin
-quinine
Describe a patient who may be a candidate for a cochlear implant
-age
-type of hearing loss
-degree of hearing loss
-word recognition ability
-any age
-sensorineural
-typically severe to profound, may be less for adults
-poor word recognition WITH hearing aids
What does "positive" reflex decay indicate?
possible retrocochlear pathology
Which test is considered the "gold standard" for newborn hearing screenings?
ABR
some places use OAEs, but this would not catch all pathologies
What is the masking rule for AC?
BC?
WRS?
•ACTE –IA ≥ BCNTE
•ACTE – BC ≥ 15dB
PLTE-IA ≥ BBCNTE
What does "retrocochlear" mean, and name a retrocochlear pathology.
beyond the cochlea
-acoustic neuroma
-auditory neuropathy
-central auditory processing disorder
Give an example of a patient who may be a candidate for a BAHA
permanent conductive hearing loss
-draining ear
-atresia
What is immitance? Admittance? Impedance?
The amount of energy being passed through a system
Admittance+impedance=immitance
Describe DPOAE testing
(stimulus, response, interpretation)
input of 2 different sounds
hair cells move and create small sound that is picked up by probe
Present/absent/reduced
Describe the function of the Eustachian tube and describe Eustachian tube dysfunction
Tube that connects middle ear space to nasopharynx. Responsible for maintaining pressure in the middle ear and allowing any fluid to drain. Dysfunction means the tube is not opening properly, pressure becomes negative in middle ear. This can lead to accumulation of fluid in the middle ear (otitis media)
Sort the following into conductive vs sensorineural hearing loss:
-Meniere's Disease
-Atresia
-Otitis Media
-Neurofibromatosis type 2
-Sensorineural
-Conductive
-Conductive
-Sensorineural
Describe how you would determine if someone were a candidate for hearing aids
-audiogram, especially 250-2000Hz
-count the dots audiogram
-audiogram of familiar sounds
-lifestyle
-self assessment measures
What do "ipsilateral and "contralateral" pathways mean, and what test are they referring to?
Acoustic reflex
Reflex is elicted in both ears, no matter what side the stimulus goes in.
Crosses over to the opposite side of the brain. Different conditions RI, LI, RC, LC, give us the patterns for different disorders.
How is an ABR interpreted?
Presence of waves
Presence of wave V as we reach threshold
Interpeak latencies
Absolute latencies