I just bought a ResMed Mirage FX nasal mask after using a FFM for 2 weeks without good results ! After 3 nights with the nasal masks, my AHI averages about 2.5 ( compared to about 20 with the FFM) .
However, with the nasal mask, air comes out of my mouth each time my lips open . It is definitely expulsed from inside my mouth ( not leaking from the mask at all ) . Is this normal for nasal mask users ?
How can you explain this air flow from the mouth when I am breathing through the nose ?
Please comment . Thanks.