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• At low CPAP pressures, the flow
through the exhaust vent may be
inadequate to clear all exhaled gas from
the tubing. Some rebreathing may occur.
Explanation of the Warning: The
exhaust vent flow is lower at lower mask
pressures (see Pressure–Flow Curve in
section A on the illustrations sheet). To
avoid rebreathing it is recommended
that a mask pressure of 4 cm H
2
O or
more be used.
• The mask must be cleaned and
disinfected/sterilized if it is used
between patients. Refer to the section
“Cleaning the Mask between Patients”
for details.
• If oxygen is used with the CPAP or
bilevel device, the oxygen flow must be
turned off when the flow generator is
not operating.
Explanation of the Warning: When the
CPAP or bilevel device is not in
operation, and the oxygen flow is left
on, oxygen delivered into the ventilator
tubing may accumulate within the flow
generator enclosure. Oxygen
accumulated in the CPAP or bilevel
device enclosure will create a risk of fire.
This warning applies to most types of
CPAP or bilevel flow generators.
• Please refrain from smoking while
oxygen is in use.
Note: At a fixed rate of supplemental
oxygen flow, the inhaled oxygen
concentration will vary, depending on the
pressure settings, patient breathing pattern,
mask selection and leak rate.
PARTS OF THE MASK
See section B on the illustrations sheet.
FITTING THE MASK
See section C on the illustrations sheet.
Note: Before fitting the mask, refer to the
section “Cleaning the Mask in the Home”.
1 Push the air tubing all the way onto the
swivel. The end of the air tubing and the
ridge of the swivel must completely
meet (Fig. C-1). Connect the other end
of the air tubing to your flow generator.
2 Place the cushion over your nose, pull
the headgear over your head and make
the straps pass below your ears.
Connect the other headgear clip to the
mask frame.
Use the Velcro
®
straps to adjust the fit
of the headgear. Do not overtighten the
straps (Fig. C-2).
3 The pads of the forehead support
should lightly touch your forehead when
the mask is in place.
Adjust the forehead support if required,
by moving it to one of the other tab
positions (Fig. C-2a). There are four tab
positions (1–4). To change a tab
position, first, loosen the headgear
straps. Then, press the forehead support
tab and move it upwards to the next
position (eg from position 1 move it to
position 2). Once again, gently tighten
the headgear straps.
4 Grasp the edges of the vent cover on
both sides of the “Click” sticker at the
same time. Firmly push the vent cover
onto the mask elbow to make sure it is
clicked securely in place.
5 Turn the flow generator on. Lie down
and check that the mask is comfortable
and there are no air leaks. If there are air
leaks, you may need to readjust the
Velcro straps (see Step 2) or forehead
support (see Step 3).
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