Immittance and Middle Ear Assessment
What is immittance?
an assessment of Middle Ear function
What are the 3 major profiles of CAPD?
Decoding deficits, Integration deficits, and Prosodic deficits
what is atresia?
absence of the External Auditory Canal
What month is in embryology is the first auditory experience?
7th month / July
What bypasses the natural hearing?
cochlear implant
What does admittance measure?
the mobility of the tympanic membrane
What is Otoacoustic emissions?
measurement of outer hair cells
what is stenosis?
narrowing of the EAM
When does the ossicles form and begin to ossify?
4th and 5th month
What is verification?
ensure that hearing aids are functioning properly, and meeting expected prescriptive targets
What causes an unusally large Vea?
perforation, PE tube, Surgical alteration of EAM
What are the types of Evoked Physiological responses?
Immittance, OAEs, and ABR testing
what is exostosis?
also known as Surfer’s Ear
Benign growth in External Auditory Canal from prolonged exposure to cold water
what is Waardenburg Syndrome?
disorder of pigmentation of various parts of the body including eyes, hair , skin, stria vascularis in the cochlea
What are the components of a hearing aid?
case, microphone, receiver, processor, amplifier, volume control, program button, battery component, optional FM receiver
What is the process of Tympanometry?
probe is placed, airtight seal, probe tone is played, ear canal is pressurized, depressurized, measure the amount of sound that travels through the ear drum.
Compare TEOAEs and DPOAEs
TEOAE- uses a noise stimulus where many sounds can be measured all at once
DPOAE- uses a tonal stimulus where one frequency is assessed at a time
what is otosclerosis?
Overgrowth of bone in Middle Ear Space that can cause ossicular fixation
What are the types of Ushers Syndrome?
affects retinas in both eyes and causes night blindness
USH 1:
Hearing: Congenital severe to profound SNHL and vestibular dysfunction
Vision: Early night blindness with progressive narrowing of the visual field to severe blindness
USH 2:
Hearing: Congenital moderate to severe SNHL with no vestibular dysfunction
Vision: Retinitis pigmentosa diagnoses between 10 and 40 years of age
USH 3 (most rare):
Hearing: Late onset, progressive HL until profound (3rd decade of life), vestibular problems vary
Vision: Variable progression of RP
What are 3 features of a digital hearing aid?
multiple channels, multiple programs, compression, directional microphones, feedback reduction, linked hearing aids, data logging
What are the types of Tympanograms?
Type A- Normal pressure, normal admittance, normal tymp width
Type As - Normal pressure, reduced admittance, normal width
Type Ad - normal pressure, high admittance, normal width
Type B (Flat) - Cannot assess pressure, low to no admittance, no tymp width
Type C - negative pressure, normal admittance, normal width
What are the stimulus driven (bottom-up) CAPD treatments?
auditory training, skills remediation, and environmental modifications like assistive tech
Types of otitis media with effusion
Serous Otitis media-Fluid present with no infection
Acute Otitis media- fluid present with infection
Chronic Otitis media- effusion remains for extended time
Mucoid Otitis media- Middle ear filled with mucus or puss
Glue ear- effusion becomes highly viscous and can bind to structures
What is USH-3? (hearing and vision)
Hearing: Late onset, progressive HL until profound (3rd decade of life), vestibular problems vary
Vision: Variable progression of RP
what is the workflow of a hearing aid fitting?
assessment, treatment planning, selection, development, verification, orientation, validation