D-6 624074/07
D NIV (Noninvasive ventilation)
In general, a mask used with the noninvasive modes can meet
these requirements:
• It must be of the non-vented/non-ported design
• Gas leakage should be controllable at low mask application
pressures
• The material in contact with the face should be soft, bio-
compatible, and nonallergenic
• It should be easy to install and remove
• It should remain properly positioned when the patient
moves their head
If you try using a nasal mask, but there is significant gas leak-
age through the open mouth, switch to a face mask.
Table D-1. Patient interfaces
Type Advantage Disadvantage
Face mask • Little patient coopera-
tion required
• Little leakage
• Ability to sleep
• Verbal communication
not possible
• Gastric distension
• Greater dead space
Nasal mask • Comfort
• Verbal communication
possible
• Little dead space
• Patient cooperation
required
• Oral leakage
Mouthpiece • Simple to use
•Inexpensive
• Nasal air leakage
• Greater dead space
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