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8 Lie down in your sleeping position. Twist the forehead support dial
(Fig. B-7) until you feel that the mask is evenly positioned on your face. It
should be comfortable, with a satisfactory seal. Gently tighten the lower
headgear straps if necessary.
9 The fitted mask is shown in Fig. B-8.
Optimising Mask Seal and Comfort
To receive effective therapy it is important to have the best seal possible
between your mask and your face. If you are experiencing leaks, please ensure
that you have followed the fitting instructions carefully. Carry out a quick check
after fitting your mask:
• Is the mask cushion creased? Creases can allow air to leak out of the mask.
• Have you cleaned your mask cushion recently? Oils on the cushion can
affect the seal.
• Are your headgear straps overtightened? Try not to alter the upper headgear
straps once they have been tightened by your clinician.
• You may need to slightly adjust the dial. Note the dial setting when
comfortable.
• Does the mask seem too close to your eyes? You may need a smaller mask.
If you cannot resolve any problems, look at the Troubleshooting section, or talk
to your clinician. You may require another mask size.
Removing the Mask
To remove the Mirage Quattro, disconnect one of the lower headgear clips and
pull the mask and headgear up over your head.
Disassembling the Mask
See section C on the illustrations sheet.
1 Detach the air tubing.
2 Unclip the lower headgear clips (Fig. C-1) and unhook the upper headgear
straps (Fig. C-2). It is not necessary to remove the headgear clips from the
headgear.
3 Remove the elbow assembly from the mask frame (Fig. C-3). It’s easier to
pivot the bottom of the elbow away from the mask frame than to pull the
elbow straight off.
4 Remove the valve clip from the elbow (Fig. C-4).
5 Peel the valve away from the valve clip (Fig. C-5). Do not pull on the
membrane to remove the valve.
6 Detach the swivel from the elbow (Fig. C-6).
7 Note the position on the dial for the next time you use the mask.
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