Upgrade to remove ads
Overview of AP 1
Terms in this set (33)
What can you evaluate with an otoscope?
What does Pure Tone Audiometry determine?
What is hearing within normal limits?
Normal AC and normal BC thresholds
What does AU, AS, and AD stand for?
AU = Bilateral
AS = Left
AD = Right
What is sensorineural hearing loss (SNHL)?
Abnormal air conduction and bone conduction thresholds with an air bone gap of less than 10 dB
What is conductive hearing loss?
Abnormal air conduction thresholds but normal bone conduction thresholds.
Maximum conductive loss is 65dB HL
What is mixed hearing loss?
Abnormal air conduction and bone conduction thresholds but the air-bone gap is greater than or equal to 15dB
What are the commonly used ranges in adults?
Normal Hearing: 0-25 dBHL
Mild HL: 26-40 dBHL
Moderate HL: 41-55 dBHL
Moderate to severe HL: 56-70 dBHL
Severe HL: 71-90 dBHL
Profound HL: >91 dBHL
What are the classification system for pediatric?
Normal Hearing: 0-15 dBHL
Slight: 16-25 dBHL
Mild: 26-30 dBHL
Moderate: 31-50 dBHL
Severe: 51-70 dBHL
Profound: >71 dBHL
What are the configuration of hearing loss?
Trough (cookie bite)
Inverted Trough (reverse cookie bite)
4000-6000 Hz Notch
What is flat?
little or no change in thresholds ( + or - 20dB) across frequencies
As frequency increases, degree of loss increases
As frequency increases, degree of loss decreases
Very sharp increase in the hearing loss between octaves
Trough (cookie bite)
The greatest hearing loss is present in the mid-frequencies and hearing sensitivity is better in the low and high frequencies
Inverted trough (reverse cookie bite)
the greatest hearing loss is in the low and high frequencies and hearing sensitivity is better in the mid frequencies
High frequency (configuration)
The hearing loss is limited to the frequencies above the speech range (2000-3000 Hz)
(Corner) Thresholds are recorded only for low frequencies and they are in the severe to profound range
40000-6000 Hz notch
Normal hearing through 3000 hz, sharp drop at 4000-6000 Hz improving at 8000 Hz
Why do we test Speech Recognition thresholds?
Used to compare and validate pure tone thresholds
Compare recognition ability between both ears
Monitor changes over time
What word list do we use for Speech Recognition threshold?
Results from supra threshold speech audiometry provides
Information regarding the patient's ability to process speech
MLV vs Recorded Speech
Can assist in determining diagnosis
Potential to estimate everyday speech understanding
Reasons for Masking
Helps us determine TYPE of hearing loss (conductive, mixed, SNHL)
Allows you to evaluate hearing in the TEST EAR (ear specific information because our ear are not independent of one another)
What does Tympanometry evaluate?
It evaluates the integrity of the middle ear system
Estimates middle ear pressure
Estimates ear canal or middle ear volume
Evaluates Eustachian Tube Function
Tympanogram Types are
Type A: normal ECV, peak pressure, and compliance
Type As: normal shallow
Type Ad: normal deep
Type C: negative pressure, ECV, and compliance WNL
Type B: flat (no peak pressure, no compliance) ECV-WNL, large or small
Acoustic Reflex suggest the
Site of lesion or retrocochlear disorder.
Must perform ipsi and contra AU to get site of lesion information
Other tests are necessary for confirmation
Acoustic Reflexes can be affected by
Middle Ear disorders
Hearing Loss in the stimulus ear
Interruption of neural innervation of the stapedius muscle
What does the otoacoustic emissions assess?
It assess auditory function up to the level of OHC
Spontaneous (don't do anything, just record what is coming out)
Distortion Product OAE
Transient Evoked OAE (clicks)
What are the four types of Tuning Fork Tests?
Weber Tuning Fork Test
Used when one ear is worse than the other.
Lateralizes to poorer ear - loss is conductive
Lateralizes to better ear - loss is SNHL or mixed
Rinne Tuning Fork Test
Compare air conduction to bone conduction
Positive - louder at opening of EAC= SNHL or normal
Negative - louder on mastoid process = conductive
Bing Tuning Fork Test
Assesses presence of conductive loss
Positive - louder with EAC closed = SNHL
Negative - No difference with EAC open or closed = Conductive
Schwaback Tuning Fork Test
Test degree of loss
patient indicates when no longer can hear tone, tester places fork on own mastoid and counts seconds tone is heard
THIS SET IS OFTEN IN FOLDERS WITH...
Overview of Sites of Lesion
Otoscopy Normal vs Pathology
Masking Pure Tones And Speech
YOU MIGHT ALSO LIKE...
Exam 2 SPA 4031 Klingenberg
Measure Meant of Hearing
Hearing management test 1
Audiology Exam 2
OTHER SETS BY THIS CREATOR
Principles and Applications of Pharmacology