Inventis TRUMPET User Manual page 26

2.3.1 Measurements in the ear
When preparing the patient for an REM test, observe the following
procedure:
1. Position the patient at around 1 metre from and facing the speaker
of the instrument, and in such a way that the ears are placed
approximately at the same height as the instrument.
2. Position the black ring of the tube so that the placement
corresponds to the required insertion distance (refer to the
markings of the ruler on the headset as indicated in the image
below). The recommended distances are:
a.
b. Women: 27 mm
c.
NOTE: the distances can vary depending on the patient. To avoid
problems, in any event, start with an ear inspection: this will give
some idea as to the dimensions of the auditory canal.
3. Position the probe headset on the patient, adjusting the loops (O-
rings) so that the probe is positioned just under the ear lobe.
4. Insert the probe tube into the patient's auditory canal, to the point
at which the black ring reaches the intertragic notch. If resistance is
encountered, do not force the tube further.
To favour the correct insertion of the probe tube and ensure it does
not snag on a wall of the auditory canal, there are insertion guides
for this same purpose supplied with the instrument. Insert the guide
20
Men: 27 mm
Children: 20-25 mm