Mask parts
Each mask usually consists of a moulded silicone cushion that seals over the nose, or the nose and mouth. This sits in a plastic frame. Attached to the plastic frame is headgear made of soft cloth that goes over the back of the head to hold the mask in place.
Popular styles of mask
Full face masks cover the nose and the mouth area. They are generally used if you are unable to sleep with your mouth closed.
Nasal masks sit over the nose, so your mouth has to be closed during use.
Nasal pillows are two silicone prongs that fit directly into the nostrils and require your mouth to be closed. They can be used when bulky masks are not tolerated due to claustrophobia.
Selecting and fitting a mask
- Choose your style of mask. If you have a nasal blockage (such as polyps) choose a full face mask, otherwise choose a nasal mask. If you suffer from claustrophobia you may require nasal pillows.
- Choose the correct size of mask. Most styles come in a range of sizes. Mask suppliers often provide measuring scales that can be used to help decide which size is best.
- Place the mask on your face. To do this you will need to unhook, unclip or unclasp the headgear from the plastic frame and then place the headgear over your head. Refasten the headgear to the frame.
- Stand in front of a mirror and tighten the Velcro straps (if your mask has them). Firstly, release the two top Velcro straps and then pull them backwards to tighten them until the mask is comfortable. Then do the same with the two bottom Velcro straps. Make sure the mask is in the centre of your face.
- Attach the tubing to the mask and the air pump.
- Turn the pump on to check there is no air leak from the sides of the mask.
- Lie down in your usual sleeping position and make slight alterations to the straps to ensure there is no air leak while lying down. This is because gravity may alter the shape of your face.
- Get used to the feel of the mask and air pressure while watching television or reading a book. The more you practise wearing the mask, the more natural it will feel.
- Use CPAP whenever you sleep – even if you go for a nap in the daytime!
Do not cover the vent holes
All CPAP masks have exhalation vents that prevent the build-up of carbon dioxide within them. They also allow some air to enter the mask should there be a power cut and the CPAP pump fails. Full face masks also have a separate safety valve that opens in the event of a power cut.
It is very important that these vent holes are not covered, even if the air makes a noise as it whooshes through them.
