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generator flushes the exhaled air out
through the attached mask exhaust
vent. However, when the flow
generator is not operating, enough fresh
air will not be provided through the
mask, and exhaled air may be
rebreathed. Rebreathing of exhaled air
for longer than several minutes can in
some circumstances lead to suffocation.
This warning applies to most models of
flow generators.
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—
Figure A). To avoid rebreathing it is
recommended that a mask pressure of
4 cm H
O or more be used.
2
The M
K
IRAGE
IDSTA
•
that can be easily removed while the
mask is fitted. The mask should not be
used with the elbow attached unless the
flow generator is turned on and
operating properly.
If oxygen is used with the flow
•
generator, the oxygen flow must be
turned off when the flow generator is
not operating.
Explanation of the Warning: When the
flow generator 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
flow generator will create a risk of fire.
This warning applies to most types of
flow generators.
features an elbow
Please refrain from smoking while
•
oxygen is in use.
Using a mask may cause tooth, gum or
•
jaw soreness or aggravate an existing
dental condition. If symptoms occur,
consult your physician or dentist.
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.
P
M
ARTS OF THE
See Figure B.
F
M
ITTING THE
See Figure C.
Note:
Before fitting the mask, refer to the
section "Cleaning the Mask in the Home".
1 Place the headgear on the head. Adjust
the side vertical straps so that the lower
strap sits just below the ear (not
touching it) and at the base of the head
(Fig. C-1).
2 The headgear clip should be parallel
with the nose and not in the line of
vision. Check that the crossover is as far
forward as possible (Fig. C-2).
To adjust the crossover to a forward
position, slide the crossover buckle
along one strap (Fig. C-2a) and then
along the other strap (Fig. C-2b).
Alternate the movement on each side
until the crossover is as far forward as
possible.
3 Ensure that the crossover and the rear
straps lie flat against the head.
4 Place the mask on the nose (Fig. C-3).
Clip the mask to the headgear.
ASK
ASK
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