Weinmann JOYCE Full Face vented Description Of The Equipment And Instructions For Use page 18

4.Adjust the upper and lower headgear straps
so that the mask sits firmly, but not too
tightly, on your face.
The HEADstrap headgear provides the
following options for you to do this (see
also "Overview" on the attached leaflet):
– coarse adjustments: slot "a" or "b" of the
headgear.
– fine adjustments: four hook-and-loop straps."
5. If necessary, re-adjust the forehead
support.
3.3 Exhaled air system (Fig. H)
vented variants
vented variants (all mask components are
transparent) have an integrated exhaled air
system: the retaining ring and mask frame are
shaped in such a way that a gap is formed
between these parts. Through this gap the
exhaled air can escape. The special geometry
of the parts guarantees that when putting on the
retaining ring the gap cannot be closed. Do not
connect an external exhaled air system,
otherwise the therapy pressure will not be
reached.
non vented variants
Warning!
The non vented variants (retaining ring, elbow
and rotating sleeve in blue) do not have their
own exhalation system! They may only be
used in combination with therapy devices which
have an active exhalation valve! If the therapy
device fails, there is otherwise the risk of re-
inhalation of CO
2
The non vented variants may never be used in
combination with an external exhalation
system (such as Silentflow2, for example),
otherwise the safety function is not guaranteed
in the event of device failure. See also the
instructions for use for your therapy device.
16
and suffocation.
3.4 Anti-asphyxia valve (Fig. G)
Warning!
Only the vented variants are equipped with an
anti-asphyxia valve. Ensure that this valve is
working correctly before every use (see
"5. Functional check" on page 20), otherwise
there is a risk of suffocation!
Safety function of the anti-asphyxia valve
The anti-asphyxia valve has an opening to the
atmosphere through which the patient can
inhale ambient air if the therapy device fails.
This significantly reduces the risk of re-inhaling
CO and thus also the risk of suffocation.
2
Inside the valve is a membrane which can
adopt either of two positions:
•As long as the therapy device is in
operation, the membrane is pressed against
the opening to the atmosphere by the flow,
sealing this opening completely. The patient
breathes through the therapy device.
•If the therapy device fails or if the device is
not connected, the membrane is in the
resting position, in other words, the opening
to the atmosphere is free. The patient
breathes ambient air through this opening.
Caution!
The anti-asphyxia valve is a highly sensitive
component. Always handle it with care.
3.5 Gel-filled mask components
On JOYCE Full Face GEL vented and
JOYCE Full Face GEL non vented, the forehead
cushion and the mask cushion are gel-filled as
standard. Gel forehead cushions and gel mask
cushions are also available as replacement
parts for other JOYCE Full Face variants.
Caution!
Gel-filled mask components are highly sensi-
tive components. Always handle them with
care to prevent deformation and damage.
3.6 Mask cushions with chin strap
plus
JOYCE Full Face vented has a chin strap
which supports the chin during therapy to stop the
lower jaw slipping out of the mask cushion and
interrupting therapy.