Refer retest, Refer, Retest – Welch Allyn MicroTymp 3 portable tympanometric instrument - User Manual User Manual
Page 39
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Directions for use
Interpreting test results
39
Refer
Condition which causes a REFER message:
•
Peak Ya is less than 0.6 mmho
Infants with middle ear effusion have lower Peak Ya at 1000 Hz, just as older children have
reduced Peak Ya at 226 Hz. When the Peak Ya is less than 0.6 mmho, the test is indicative
of abnormal middle ear function, most commonly middle ear effusion.
Retest
Note
You may choose to retest the patient to confirm a REFER result.
-400
-200
0
200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
Note
Certain testing or patient conditions may cause inconclusive results, yielding a
RETEST message on the display. You may interpret a series of RETEST results as
a REFER result.
-400
-200
0
200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
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