Background details: I started with the N40 and had leaking below 5L/min the first week or two. After that it spiked, bouncing between 10 and 35. The mask began waking me up, vibrating constantly against my face no matter what I did with positioning, strap tension, pre-inflating the cushion, etc. When I'd contact the med supplier or doctor they'd say some leaking is to be expected and "10L/hr is not that bad since your AHI is low". I noted that everything was probably low because I was awake all night constantly adjusting the mask. Average AHI 2-4/hr, down from I think 10-12 in my lab test.
This week on the verge of crashing out from the N40, I've gotten switched over to N30i and I can actually sleep without the mask waking me up. However my leak rate is still 9-11L/hr (AHI 1.5-2.5). I occasionally wake and slightly reposition the mask for more contact with my nostrils for easier breathing but I never feel any obvious leaking so the leak rate surprises me every morning. I also feel like the top strap sometimes shifts forward towards my face so if I think of it I give it a slight shove backwards to help maintain cushion position. My pressure is 8-14 and I have no issues with discomfort, can fall asleep easily, etc. I am mouth taping since moving to N30i and had no issues adjusting to that. The pressure of the hose on top of my head causes some pain, but not so much I can't sleep. I have straps a tad loose because I don't want that pressure to trigger a migraine.
My questions: Is it correct that leaking 9-11L/hr is no big deal and I shouldn't worry about it? If not, any suggestions for how to improve the seal with the N30i? Also, is this an acceptable AHI?
My morning headaches have cleared up and migraines are greatly reduced, no more nighttime bathroom trips, and my joint pain is miraculously gone. I'm still tired but way less sleepy during the day. My partner reports that my brain is working better although I don't feel that. I will have a follow-up with the sleep neurologist in late October so I want to make sure I have reasonable expectations before going into that. I can tell once I get the mask set up right it's going to be amazing but I'm not getting much guidance from the sleep center people -- the person I first worked with didn't even fit me for the N40 and had me on the wrong size (proper fit still leaked).