D-11049-2, Ver 11
Page 13 of 26
AUDITORY STEADY-STATE RESPONSE (ASSR)
C
LINICAL
U
SE
ASSR testing produces frequency-specific information, and provides an objective and accurate estimate of the behavioral pure-tone
audiogram. It is well-suited for testing infants, young children, and other individuals unable to provide reliable behavioral responses.
See Chapter 7 of the User's Manual on Computer Desktop for details. For optimal results, patients should be quiet and relaxed
during testing. For 80 Hz ASSR, patients may be sleeping; but, for 40 Hz ASSR, patients should not be sleeping.
S
ETUP
1.
You will need:
"Snap" electrodes
A81 Amplitrode®, A82 Amplitrode®, or A90 VivoAmp™
ER-3A-800/ER-3C-800 Insert Earphones or H-800/H-801 EP Headphones
PDI electrode Prep Pads
Cotton pads or gauze
2.
Connect your Insert Earphones or EP Headphones and your Amplitrode® or
VivoAmp™ to your VivoLink™.
3.
Attach the tubes on the Insert Earphones if they are not already attached.
4.
Select the appropriate size of ear tips for your patient.
5.
Attach the ear tips securely to the ends of the earphone tubes.
E
NVIRONMENT FOR AN
ASSR
T
EST
Adult Patient or an Older Child
The patient may be placed in a chair or on a couch, whichever is more comfortable for the patient and the operator.
Tests are conducted with the patient relaxed, lying down or in a chair with the neck supported. Patients are encouraged to
sleep during the test.
Infant Patient
Tests are conducted with the infant sleeping or lying down and very relaxed.
Place the VivoLink™ next to the infant close enough for the Amplitrode® or
VivoAmp™ and Insert Earphones or EP Headphones cables to reach.
P
REPARE THE
P
ATIENT
Refer to the "Patient Preparation" section for:
Ear preparation and ear tip insertion
Skin preparation
Electrode application
E
LECTRODE
S
ITES FOR
ASSR
High forehead
–
black
clip (+)
Low forehead
–
green
clip (ground)
For 1-channel Operation (A81)
Nape
– white clip (–)
For 2-channel Operation (A82/A90)
Earlobe left
–
blue
clip (1)
Earlobe right
–
red
clip (2)
R
UN THE
T
EST
1.
Perform an impedance check (see previous section).
Good impedance is crucial for ASSR testing.
2.
Select the appropriate protocol and montage.
Please refer to the "Integrity™ User's Manual PDF" on the computer desktop for more detailed instructions.
3.
Press the
Start
button to initiate the test.
4.
After the test is complete, choose "Save" to save the record or "Clear All" to delete the record.
High Forehead (+)
Nape (
–
)
Low Forehead (Ground)
1-channel Montage
2-channel Montage
High Forehead (+)
Earlobe (
1
)
Low Forehead (Ground)
Earlobe (
2
)
