Welch Allyn REF 29400, Directions For Use Manual

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Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev E
25
Chapter 8: Distortion Product Otoacoustic Emissions
Performing a DPOAE Test
This flow chart begins at the point where the Power ON flow chart ended. The steps shown here
are specific for performing the pre-programmed DPOAE test procedure. Note: Selection of the
RESTART button from any point in the program flow chart returns to the PERFORM DPOAE
message so that function is not represented in the flow chart.
Re: CONTINUE option. When the DX SELECT button is chosen when the CONTINUE message is
displayed, the program will try to proceed to the next step in the test process, but possibly with poor
calibration results or test conditions, so it is not recommended on a routine basis.
Each test is assigned a unique test number that is displayed in the Test R/L EAR box. Since the
Welch Allyn OAE Hearing Screener holds 10 tests in memory, this unique number can assist you
in associating a test with a particular patient. To keep track of the patient test numbers, the
patient’s name, test numbers and details of the test (if desired) should be recorded in a logbook or
patient file.
TESTING X KHZ
ART LVL ## / ##%
Test R EAR
#### -R
DX SELECT
DX SELECT
PROBE DETECT
IN PROGRESS . . .
Test L EAR
#### -L
V
DX SELECT
Calibrate
Channel B…
PROBE IN EAR? or
OCCLUDED PROBE?
REFIT AND RETRY
DX
SELECT
Calibration B
OK
Calibration A
Unacceptable
^
####-R/L
PASS/REFER SEE
DETAIL
HIGH # ARTIFACT
REFIT AND RETRY
DX
SELECT
PERFORM DPOAE
Log # in logbook
Calibrate
Channel A…
Calibration B
Unacceptable
High
Artifact
Calibration A
OK
CONTINUE
PLEASE RELEASE
BUTTON!
DX
SELECT
HELD
DOWN
Probe detected
No probe
detected
NO PROBE FOUND
ATTACH PROBE
DX SELECT
V
V
Test continues through
the frequencies.
See note below about
CONTINUE option.
DX SELECT
Artifact threshold
increased by 20