otometrics Madsen ZODIAC 901, Руководство пользователя

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·
The transducer may be held in the hand and used to guide the probe
into the patient’s ear canal. This is most practical for fast screening of
patients, as the transducer must be supported all the time. If the probe
is not fixed to the transducer, slide the small slotted cover in the end of
the transducer upwards, position the probe so that the flexible-tube at-
tachments lie snugly in the recess in the bottom of the transducer, and
gently push the probe backwards into the transducer until resistance is
felt. Slide the slotted cover back to lock the probe in position.
·
The transducer may be held in the hand while the probe, connected to
the transducer only by the flexible tubes, is inserted (with an eartip)
into the patient’s ear.
CAUTION! CAUTION!
On no account should the integrity of the three plastic tubes be
violated.
Inspection Of The
Patient’s Ear Before inserting the probe into the patient’s ear, make a careful inspec-
tion of the ear to identify any possible problems. If necessary, brush the
patient’s hair away from the ear to gain a clear view. Gently pull the ear-
lobe (
pinna ) back and press the tragus forwards towards the face to in-
spect the part of the ear canal which will be in contact with the eartip.
Excessive ear wax will interfere with the measurement and block the
probe channels
. Other foreign objects and dirt could have similar unde-
sirable consequences. Remove them. Sores, cuts or warts could lead to
patient distress during measurement. Signs of blood or pus could indi-
cate infection.
Excessive growth of hair around the ear canal may make an airtight seal
impossible. The
Leak lamp on the probe will light if this problem occurs
during an automatic measurement. It may be possible to cure a leak with
a smear of petroleum jelly, but too much of this is likely to block the
probe channels.
Choose an eartip of a suitable size and insert the probe into the narrower end
of the eartip first. When inserting the probe and eartip into the ear canal, pull
the earlobe back to straighten the ear canal, and at the same time ask the pa-
tient to open the jaw, as this will have the effect of widening the ear canal.
Rotate the probe and eartip during insertion, as this will facilitate entry and
reduce patient discomfort.
Although tymp. and reflex measurements made using the ZODIAC 901
are less vulnerable to errors resulting from unwanted noise than pure-
tone audiometry measurements, it is nevertheless important that the pa-
tient keep quiet during a measurement. This is especially important dur-
ing reflex measurements, where small changes in compliance are
measured in real time. If the transducer is being held in the hand, keep it
still and avoid adjusting the eartip while a measurement is in progress,
to prevent microphony. Noisy office machinery in the room should be
switched off, and conversations terminated. A patient with a cold may
usefully be invited to clear his throat and blow his nose before the meas-
urement begins (whereafter the patient must equalize pressure prior to
Operation Manual 27
GN Otometrics GENERAL DESCRIPTION Chap. 3
ZODIAC 901 Middle-Ear Analyzer
HEADSET AND PROBE
3.5