I increased the pressure, eventually reaching 11cm without any improvement and with much drier sinuses. Finally, a few days ago, I bought a respironics series one auto cpap (model 560p) hoping this would solve my problems. Of course it ain't that simple....
There have been some strange things, such as a long cheyne-stokes event and another case where the pressure ramped up to 15 centimeters while I was awake and trying to get to sleep, but I have been able to work thru these by using CFLEX instead of AFLEX and adjusting the relief setting.
But here's one, see the attached plot, that still puzzles me. As far as I can tell I was breathing normally. Blood oxygen levels were good and there were no events. If you look closely at the flow waveform, you can see a suggestion of periodic breathing, but nothing major.
yet my machine, for some reason or other, took it upon itself to ramp up the pressure. It ramped up a total of 5 times, then stopped for a while before it ramped up another 4 times. (I only included a couple of ramps in the attachment).
Does anyone have any idea why it would do this?
I realize that the algorithm used by respironics is very complicated (I read the paper on the Philips website, can't say I understood it all), but what the heck could the machine be sensing that would cause it to ramp?
Only wise people learn from them