Term
Normal values for Peak Pressure, Gradient, Static Admittance, and ECV:
-TPP: Borderline: ___-___ daPa. Abnormally negative is more than ___ daPa
-Tympanometric width/gradient: children are in the 90% range=___ to ___ daPa. Adults ares in the 90% range=___ to ____daPa
-Static admittance/Compliance (Peak Y): Children are in the 90% range which=___ to ___ mmho/cc^3/Ml. Adults are in the 90% range=.___ to ___ mmho/cc^3/ML
-Ear canal volume: Children are in the 90% range=___ to ___ cc^3/mL. Adults are in the 90% range=___ to ___ cc^3/mL |
|
Definition
| 100-200; -200; -60 to -150; 50 to 110 ; .2. to .9; 3 to 1.4; .4 to 1.0; .6 to 1.5 |
|
|
Term
Interpreting Tympanometric Peak Pressure (TPP):
-ASHA: abnormally negative peak pressure which is > ___ daPa
-Dr. Hall: normal peak pressure is ___ to ___ da Pa
-Others use ___ daPa as the cutoff |
|
Definition
|
|
Term
Purposes of Acoustic Reflex Threshold (ART) Testing:
-Tests ____ function
-site-of-lesion testing: can differentiate ___ from ____ disorder
-may help predict hearing sensitivity in ___ cases |
|
Definition
| ME; cochlear; retrocochlear; some |
|
|
Term
| How sensitive is the acoustic reflex in identifying 8th nerve disorder and cochlear disorder? |
|
Definition
|
|
Term
| Is the ABR or acoustic reflexes more sensitive in identifying 8th nerve disorder? |
|
Definition
|
|
Term
| What test is the lowest intensity level of a stimulus that results in the smallest measured change in acoustic immittance |
|
Definition
| Acoustic Reflex Threshold (ART) |
|
|
Term
ART:
-stimulus must be sufficiently ___ to elicit response
-acoustic reflexes become larger as intensity ___ |
|
Definition
|
|
Term
What are the different pathways depicted in this picture?
[image] |
|
Definition
| Top left is right ipsi, top right is left ipsi, bottom left is right contra, and bottom right is left contra |
|
|
Term
Considerations for Measuring ARTs:
-Can cause permanent ___ ___ and ___
-Presentation levels should not exceed ___ dB HL
-Use ___
-Patients with lower _________ may not tolerate test levels
-May be absent at ___ Hz, even in young normal-hearing ears |
|
Definition
| hearing loss & tinnitus; 105; caution; louder discomfort levels LDLs; 4000 |
|
|
Term
| What frequencies should I measure? |
|
Definition
|
|
Term
| The sound & measurement probe is in the same ear |
|
Definition
|
|
Term
-Sound L, probe R=_______
-Sound R, probe L=_______ |
|
Definition
| left contra; right contra |
|
|
Term
-ARTs are absent depending on the ___ of a cochlear hearing loss. Ex: Someone with an 80 dB cochlear hearing loss will have ___ reflexes
-Ears with loss up to about __ dB HL produce ART the same as
normal-hearing ears |
|
Definition
|
|
Term
What does this show?
[image] |
|
Definition
|
|
Term
What does this show?
[image] |
|
Definition
Sound effect for retrocochlear disorder-right 8th nerve disorder
[image]
-Watch for absent/elevated reflexes that do not agree with amount of hearing loss |
|
|
Term
What does this show?
[image] |
|
Definition
Mild ME Dysfunction in the right ear
[image] |
|
|
Term
What does this show?
[image] |
|
Definition
Right 7th nerve disorder
[image]
-patient may have facial nerve involvement, including a facial droop or history of Bell's palsy |
|
|
Term
What does this show?
[image] |
|
Definition
Small-intraxial brainstem lesion
[image]
-ARTs vary depending on size and location of pathology
-Can cause pressure on various structures, affecting ARTs on both sides |
|
|
Term
What pattern is this?
[image] |
|
Definition
|
|
Term
What does this show?
[image] |
|
Definition
Large-intraaxial brainstem lesion
[image]
-Significan non-auditory neural symptoms likely |
|
|
Term
Test limitations of ART:
-CNT if unable to obtain or maintain a ___ seal
-CNT if listener is ___ to loud sounds (i.e. hyperacusis)
-CNT on some patients like someone with ______ or ______ |
|
Definition
| hermetic; sensitive; aural atresia or draining ear |
|
|
Term
Rationale for the Sensorineural Acuity Level (SAL) Test:
-provides crosscheck of ____ ___ thresholds
-can sometimes allow accurate measure of BC sensitivity in cases of moderate/severe __HL
-May be ___ for young children than conventional masked BC testing |
|
Definition
|
|
Term
| What is the test method for the SAL test? |
|
Definition
| test thresholds via insert earphones or headphones; introduce masking via BC oscillator |
|
|
Term
SAL Test – Special Considerations:
-Need audiometer that can produce ________
-Need ___ insert earphones
-Need a ___ ___ dedicated for SAL procedure (high-level noise will affect calibration of the oscillator)
-Need an adjustable ___ to place BC oscillator on the forehead |
|
Definition
| NBN; calibrated; BC oscillator; headband |
|
|
Term
Administration of the SAL Test:
-Obtain AC threshold in each ear while presenting masking via ___ ___ on ___
-Test frequencies are ___, ___, ___, and ___Hz
-Consider masker levels: SAL form often lists ___ ___ for each test freq. Masker level presented via BC oscillator; typically at ___ levels
-But max levels for BC oscillator are ___ than for inserts/headphones |
|
Definition
| BC oscillator; forehead; 500, 1000, 2000, & 4000; masker levels; maximum; lower |
|
|
Term
|
Definition
|
|
