This shows a period of about 30 minutes during which my machine up'd the pressure several times in response to minor flow limitations, eventually maxing out at 20 and waking me up. I have several episodes similar to this every night - last night, there were 4 - two that woke me up and two that did not.
I'm trying to assess what might be causing these periods, whether they're anything to be concerned about, and what, if anything, I might want to do about them.
Working theory: these are periods when I roll over onto my back.
If you look at about 2:16 AM, there's a CA and a mini-hypopnea - this pattern looks very much like what's seen at 2:43 AM (just after re-starting). At 2:43 I know I was awake - was I awake (albeit briefly) at 2:16 as well?
Between 2:16 and 2:27, it looks like I'm sleeping peacefully, then a series of pressure bumps starts, with each bump followed by a period of adjustment in my breathing, culminating in a series of OA/H that drive the pressure up to max until I awake at 2:41.
So, what do you think? I'm planning on trying out some of the pillow-devices that prevent rolling over onto my back. I'd also like to get a logging oximeter to see what sort of desaturation I'm seeing associated with these periods (if any). Any other ideas for pinning down what's really going on during these periods?