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CD 443 Exam 2 – Questions & Solutions (Verified)
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CD 443 Exam 2 – Questions & Solutions (Verified)
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CD 443 Exam 2 – Questions & Solutions (Verified)Screening Right Ans - -technique for identifying people who might have
particular disorder
-disorder has significant negative effects and can be treated once identified
-tests are quick, reliable, tolerable
Who can screen for Hearing Loss Right Ans - -SLP's can test age 3-adult
-AuD's can test any age group
-support personnel birth- 6 months and 3- adult (supervised by a certified
audiologist)
-procedures vary
Why use Personnel to test hearing? Right Ans - -more cost-effective
-costs are major concern in large-scale programs
Procedures of Hearing screening Right Ans - -newborn to 6 months
(ABR/OAE)
-7 months- 5 years (behavioral testing, frequently special techniques)
-adults (behavioral testing)
ABR Right Ans - -auditory brainstem response
-look at brainstem and how neural fibers respond to sound
OAE Right Ans - -otoacoustic emission
-look at outer hair cells
Pure-tone hearing screening Right Ans - -infants 7 months and older
-present tones at a fixed level, see if they hear them
-kids: usually 20 dB HL, adults: 25 dB HL
-frequencies 1000,2000,4000 Hz
-if they hear ALL of them, they pass
-if they miss ANY of them, they fail
When to screen Right Ans - -infants w/in 3 months, any time parents are
concerned
-preschool and school children when they start school, K, 1, 2, 3, 7, 11 and
anytime anyone is concerned
-adults every 10 years to age 50, then every 3 years
,What screening tells you Right Ans - -pass; hearing is likely to be w/in
normal limits
-no need for further evaluation (unless there are significant concerns)
-fail; hearing is likely to be impaired
-a full hearing evaluation is needed
**our methods are not perfect**
Hearing screening steps Right Ans - 1. brief case history (if any)
2. otoscopy (sometimes)
3. tympanometry (sometimes)
4. pure-tone screening
1000,2000,4000 Hz
presented at a single level only
-very different from full evaluation
The Audiologic Evaluation Right Ans - 1. case history
2. otoscopy
3. tympanometry and acoustic reflexes
4. pure-tone audiometry
5. speech threshold tests
6. suprathreshold speech tests
7. sometimes tests of loudness growth or special audiometric/audiologic tests
Case History Purpose Right Ans - -may provide information regarding
expected test results and cause of hearing loss
-the interview process builds report, reduces patient stress
-relationship between audiologist and patient is key to later success w
rehabilitation
Case history Questions Right Ans - -why are you here today?
-hearing loss history
duration
onset
severity
difficult situations
hearing aid experience
-family history of hearing loss?
-otological history
, middle ear disease or surgery?
noise exposure?
-general medical history?
Otoscopy Right Ans - -done after case history, before anything else
-good info; general health of the ear
-helps you to know whether or not to do tympanometry
-helps you determine whether and/or how to use insert earphones
-two broad classes of otoscopes
hand held and video
Otoscopy instructions Right Ans - -all patient instructions should include
1. what the audiologist will do and why
2. what the patient should do
Otoscopy technique Right Ans - -gently pull pinna to straighten the external
auditory canal
(for adults pull up and back, children down and back)
-gently insert speculum THEN look
-examine shape and condition of ear canal
-examine the ear drum, rotating otoscope to view all edges
Audiometer key parts Right Ans - -pure tone generator
-attenuator
-interrupter switch
-output transducer (s)
-other features;
noise generator for masking, external inputs, VU meter, response button
Pure tone generator Right Ans - -oscillator
-located internally
-discrete "audiometric frequencies"
standard octaves:125-8000 Hz
inter-octaves: 750, 1500, 3000, 6000 Hz
-ultra high frequency audiometers
up to 16 kHz
-controlled by the frequency selector switch
Attenuator Right Ans - -controls the intensity of signal
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