High leakage rate, but great O2 scores

After over two years of unsuccessful struggle to sleep with my ResMed 10 V-Auto BiPap machine and trying at least 8 different masks, I am finally able to sleep all night with the Dreamwear mask and a chinstrap, but my ResMed report each morning shows extremely high rates of leakage (from 48 to 88), and very erratic events per hour ranging from 0.9 to 18.6. The real puzzle is that most nights my wrist pulse/oximeter shows great O2 levels, often with no drops below 4% all night. And to add to the confusion, those nights with fewer apnea events often show the higher leakage scores. I know air is escaping in occasional puffs through my lips, even with the chinstrap, but I have even worse leakage problems with full face masks, which keep me awake. But I'm wondering if the O2 score is a better indication of how successful my therapy is, or the events and leakage numbers? Any ideas? CommunicativeGoldFox

What is the nature of the leak issue that keeps you awake? Also, you can change your forum-given screen name by clicking on the down arrow at the upper/right corner of the screen. You have settings and dashboard options and one of them will allow you to choose your own screen name.

When you change mask types, do you go to the top level screen on your ResMed machine and make sure the mask type coincides with the mask type your are actually using?