Technical Specifications - ResMed AirFit N20 User Manual

Problem/possible cause
Mask may have been fitted incorrectly.
Cushion may be dirty.
Cushion membrane is creased or folded.
Mask is not tightened correctly.
Mask may be the wrong size.
Mask does not fit properly.
Mask is incorrectly assembled.
Mask may be the wrong size.

Technical specifications

Pressure-flow
curve
The mask contains passive venting to protect against rebreathing.
As a result of manufacturing variations, the vent flow rate may vary.
Solution
Pull the mask away from your face and
reposition, ensuring that the lower corners of
the mask fully enclose your nose. If
necessary, readjust the headgear straps to
keep the mask in the right place.
Clean the cushion according to the
instructions.
Remove and refit your mask according to the
fitting instructions. Ensure that you position
the cushion correctly over your nose before
pulling the headgear over your head. Do not
slide the mask down your face during fitting
as this may lead to folding or curling of the
cushion.
Ensure that the headgear straps are not
overtightened or too loose. You may find that
this mask does not need to be tightened as
much as other nasal masks.
Check that the headgear is not twisted.
Talk to your clinician.
Disassemble the mask, then reassemble
according to the instructions.
Talk to your clinician.
Pressure Flow
(cm H O) (L/min)
2
4 20
7 27
11 35
14 40
17 44
20 49
24 54
27 58
30 61
English 7