I haven't discussed it with my doctor yet. My GP really doesn't know a whole lot about this stuff and of course anyone related to the sleep study is pretty much on to the next patient as soon as you walk out the door.
My AHIs do vary, although I don't know what the factors are. I know I've had off and on problems with leaks (mask and mouth), which so far the small cushion on the Simplus seems to have taken care of both. I am considering one other possibility, which may in fact improve at lower pressures: Could it be possible that some of the air being forced into my nose (and mouth with a FFM) is going into my stomach? I know I have read about some people experiencing bloating and gas while on CPAP, and I do feel that I have been more gassy than usual (talking "southern" winds here
), which my wife would argue was pretty often even before CPAP.
Since my events are all obstructive (very rarely do I see an OA) I would have expected my AHI to drop considerably at a pressure of 20, which was more or less an experiment to see if I could obtain a "0" or close to it. Either my throat is severely
blocked off when I sleep or the pressurized air is finding another path and of less resistance. Since my machine reported essentially no leaks during my last sleep session and I still had quite a few events at 20 cm H2O, I'm running out of ideas and feel like it must be going somewhere else that cannot be detected as a leak.
I'm working again tonight but I think before my next bed time I will try APAP again, maybe 10-16 and see how it goes for a while.