Thank you for the info. The EPR dropping by 1, 2 or 3 cm's sounds like I have a bi-level option! Good. The central AI's are only around .3 or .7. I have only used this machine a few nights. Yes, I do sleep during the day past noon (I work nights at a hospital) so that explains the interruption. Have...

In the clinicians menu I see the AHI and I understand what that means, but below that it shows the Central AI. Does this stand for central apneas, because centrals mean that I either have a heart or neurological problem. Also, what does EPR stand for? One last thing. Last night I slept 7 hours but I...