GM INSTRUMENTS Naris, Руководство пользователя

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Naris
Naris User’s Manual V14 14/02/20 Page 19 of 52
PERFORMING A TEST
The patient should be connected to the instrument
only when the screen shows the flow and
pressure axes , and after checking that the dot lies on the origin of the graph. If the system is
not correctly zeroed, while no subject is connected, press Z on the keyboard, or click on the
Zero button.
a)
ANTERIOR METHOD
The anterior test requires no patient co-operation and can therefore be performed on any
subject. The technique requires that one side of the nose be used as an extension to the
pressure tube (to monitor the pressure component relative to the mask pressure) and this
connection is achieved using either:
1) Microfoam tape, a tip connector, anterior tubing, and an anterior connector, or
2) A foam insert, anterior tubing, and an anterior connector
The black mask-mounted connector should be sealed during the anterior method, as it is not
required.
In this method flow is measured on the open nostril. The mouth should be closed during the
test and once the resistance figure for one side has been obtained, the role of the nostrils is
reversed by moving the tape assembly or foam insert to the other nostril.
It is a fundamental requirement of this technique that an airtight connection of the instrument
pressure tube onto one side of the nose be made with as little distortion as possible. Satisfying
this criterion results in the best possible accuracy.
N.B If foam inserts are to be used, substitute the foam insert for the tip connector and tape as
shown below.
ANTERIOR TEST PREPARATION
a) make a hole in the tape using
TIP CONNECTOR
the smallest die on the punch
supplied
b)
fit a tip connector and 15 cm
of anterior tubing to the tape
TAPE
as shown (or 15 cm of anterior tubing
onto a foam insert).
De-grease the nose with an
appropriate agent such as
SILICONE
surgical spirit
ANTERIOR TUBING
c)
fix the tape onto the nose (or foam into
FOAM INSERT
the nose), position the tube against
(alternative to tape/Tip)
the cheek where it will be during the test,
and check for leakage by blocking the