After 2 weeks on my prescribed fixed pressure of 8, last night I tried APAP mode for the first time.
I would appreciate your comments on my Sleepyhead results, as they are a little different to what I had expected.
I had expected the pressure to remain on the lower setting (6) most of the night except when an event occurred, at which time it would rise to 8 or a bit over. Max set at 9. 'Response' set to 'Standard'
My sleep test showed an AHI of 43.1 - obstructives & hypops (no centrals) - longest obstructive was 81 seconds.
Fixed pressure of 8 has been very successful, with obstructives being a rare event over the past fortnight. More nights with no obstructives than with, & on the nights when I had some it was only 1 or 2, no longer than 10 to 15 seconds.
Moving on to last night on APAP, the number of obstructives jumped to 5, 3 of which were around the 25 second mark.
Certainly the pressure ramped up on these events, but what I am puzzled about is that it also ramped up on occasions when there were no events.
Earlier in the night it ramped up for the centrals (which I believe to be 'false centrals' - which my 'DME' agreed with) but appeared to 'learn' during the night as it did not ramp up to centrals later in the night. These do not concern me, but I am puzzled by the ramping up of pressure when no events of any kind were reported. Is this normal machine behavior?
I feel like I had a good sleep, & the AHI is low enough to not be of concern, but I have woken with the slight tightness in my chest that I experienced over the first few nights of machine use, but which had dissipated as my body became accustomed to working with the pressure.
I tried APAP mode in the hope of reducing the amount the machine worked, to minimise power usage & maximise comfort, but the opposite seems the case with an increase in obstructives & a higher 95% statistical pressure. Yes only one night I know, but given the minimal changes to pressures I'm tempted just to go back to the fixed pressure of 8.
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