Welcome to the forum Alex.
Can you do me a favor please and in the future post images but with not so many graphs on the right side? So many graphs means they have to be so small and harder to evaluate. We only need 4 from a Respironics machine....Events, Flow Rate, Pressure and Leak.
In the format shown here.
viewtopic/t158560/How-to-post-images-for-review.html
Your pressure settings work well part of the night and not so great other parts of the night. This happens often (I had it happen to me at first myself) and when this happens it's usually either we are on our backs (supine sleeping) or in REM stage sleep...or sometimes a combination of both.
Question for you....were you on your back when you went to sleep and when you finally got up...when the bulk of your clustering of events was going on?
Another question for you....how much time awake at the beginning of the night was spent with mask and machine on?
It's very common to need more pressure when on our backs or in REM stage sleep. The timing of the clusters don't really go along with REM stage sleep all that much (especially the beginning of the night and the end of the night clusters) so supine sleeping would be my first suspect.
Now you could try to stay off your back to see how much difference that would make but that's often easier said than done and your pressure settings are low in the grand scheme of things so if it were me I would just give the machine a better head start with more minimum pressure so it can get to where it needs to be to better hold the airway open in the first place. These machines work better by preventing the events instead of trying to fix them after the fact and despite the auto function for auto adjusting pressures they sometimes can't respond quickly enough. They don't go from 4 to 10 cm in the blink of an eye. It takes a period of several minutes for the machine to evaluate and respond and while the machine is doing its thing the airway closes and opens back up again.
Best thing to do is increase the minimum so the machine has a better head start to get where it needs to be. Quite common really...I had to do it myself because for me it was REM stage sleep issues. I sometimes would need a lot more pressure during REM than other parts of the night.
So I would increase that minimum pressure to maybe 7 cm IF...you were asleep that first hour and ending hour.
If you were awake that first hour and ending hour then those flagged events aren't real and instead the machine flagging awake breathing irregularities by mistake. It has no way to know if you are asleep or not and our awake breathing is irregular and it will often get flagged. If we are awake when those flags happen it doesn't count because they only matter when we are asleep.
Awake stuff doesn't count and has to be omitted from the evaluation process.
So more minimum pressure if you were asleep.
If you weren't asleep then we need to try to figure out why you are having trouble sleeping.
I may have to RISE but I refuse to SHINE.
