I've been meaning to ask, but kept forgetting, what is the little plug on my Comfort Full II mask for? The little plug is located right next to the hose tube.
Eric is right. Most masks are fitted with a little opening with a plug so that supplemental oxygen can be fed into the mask if needed. Majority of patients probably will not need this "extra" feature, but is there if needed.
Oh, ok. So I should leave it plugged, not remove the cap. When I watch the instruction CD it mentions the little plug, but I think it says it's to allow CO2 to be expelled when you breathe.