What must I know about a non-invasive mask ventilation system?

The interface. This is typically used for COPD or sleep apnea. Can also be used in emergency with heart failure.. The mask is the most important thing since this is the part that connects to the pt. If the mask is not comfortable no one will use it. Also this must form a tight seal to keep the "pressure" in and do its work. Again depends what the non-invasive will be used for.