I do see a few places where the flow rate is near 0 in the presence of LL (32) for greater than 10 sec and small modulation is visible. Compared to a true apnea the modulation is higher in amplitude so this appears to confirm your view. My AHI are always below 5 and usually in the presence of about 10% LL, but always below 33. Quite a challenge to eliminate LL without tightening the mask too much. Next step to try another mask with DME.
Are you sure that your leaks are not through your mouth?
Yes, I believe my mouth must be open or at least air leaking between my lips. Usually wake up with very dry mouth and lips sealed shut. Typical LL is under 33.
FFMs do not necessarily solve the mouth breathing/dry mouth problem - I still have it. I believe while sleeping I open my mouth sufficiently to have the lower edge of the mask slip into my mouth and result in leaks through my mouth and out.
Chin straps for me had the added complication of encouraging/causing? me to swallow air, which resulted in a very uncomfortable experience for the next day or two.
There is a LOT of money to be made by someone that can solve the mask issue with CPAP therapy. Researching this it has for years been the number one problem and often the main reason many people just give up on the therapy.
I am not a Medical professional and I don't play one on the internet.
Started CPAP Therapy April 5, 2016
I'd Rather Be Sleeping
If the leak graph goes up then kinda flat tops like a rocky plateau for a while vs looking like the US Rockies, then it is mouth breathing.
If it is spiky like the Rockies and jumps up and down a lot, then it is probably a mask leak.
I think it is because the mouth opens and stays open while the mask will flutter sort of. Different than the lips fluttering.
Apnea Board Moderator
Breathe deeply and count to zen.
INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
Thought I had mastered the tongue seal ... but once asleep facial muscles relax and mouth must open. Leakage is mainly flat topped so must be open mouth leakage. Bought a basic chin strap but not comfortable adapting to it. Early in first two months of therapy tried numerous nasal and ffm. Terrible time trying to stop leaks on the ffm due mainly to larger perimeter to make a seal. Avoiding pillow masks as don't like anything near my nose.
Back to the DME next week although undecided on which mask to try next, Read good reviews on the F&P Forma.