Audio Traveler AA222, Инструкции по эксплуатации

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AA222 Operation Manual Page 62
Figure 26:
Follow this instruction. To increase the middle ear pressure (create a
neutral middle ear pressure) make the patient blow softly with the
mouth closed while also closing his/hers nose with two fingers.
Press the blinking “Pause” (9) key once again as told in the
information window and the test will make its final and third sweep.
Now three tympanometric curves can be viewed in the screen where
a change in peak pressure graphically will indicate the function of the
Eustachian tube.
To the right of the tympanogram under Pressure 1, Pressure 2 and
Pressure 3 the peak pressures of the three tympanometric curves
are also expressed numerically in daPa.
If the three peak pressures are the same, it has not been possible for
the patient to operate his Eustachian tube to change the middle ear
pressure. This means that the Eustachian tube is temporarily or
permanently out of function.
Note: From the Common Setup Menu it is possible to set up the
“Pause” key (9) to be controlled from the Remote Switch of the
probe.
”Child” Function
AA222 has been equipped with a special Child Function. The
intention of this function is to help the operator keeping the child
concentrated for the short while it takes to perform the test.
The Child Function is available from the 1) Tympanometry Test, 2)
Reflex Test and 3) Reflex and Tympanometry Test.
To activate the Child Function press F3.