I have always had a high number of central events and very low obstructive. Looking at my ResScan:
Jan to April 2014 I was:
From May to August 2014 I was:
I use a ResMed S9 VPAP Auto with heated humidifier tray
I use a ResMed slimline hose and ResMed Quattro FX Full Face Mask
My settings on the ResMed are still the same as they set them after my sleep study back in 2011. They are
Min EPAP: 5.0
Max IPAP: 14.0
Pressure Support: 8.0
I am 5' 9" and 157 pounds
The place I did the sleep study had me in there for 3 different nights. 1 night to determine I had apnea and 2 nights testing with a CPAP machine.They had me using a standard CPAP machine which I could not stay asleep with and was blowing me up like a balloon.
When they tested me the first night with no machine my RDI was 28.1 with non REM RDI at 33.4 and REM RDI at 4.2 but I spent only 18% of my time in REM and 73% in N2 sleep. But my sleep efficiency was 86.4%
When they tested me the 2nd time they could not find a setting that worked and suggested I be treated with AUTO CPAP 7-15cmH2O, my sleep efficiency was 77.9%
When they tested me the 3rd time my sleep efficiency was 69.7% and I spent ZERO time in REM even though I was sleeping for 275 minutes. They claim the best controlled events were at BPAP S/T at a setting of 15/10cmH2O with back up rate 10BPM.
From all 3 tests I never got a better night sleep than with no machine or mask. I left 2 of those nights with back pain from over bloating.
My machine was ordered and somehow during a conversation with the doctor he mentioned a VPAP Auto machine that would avoid having to breathe out against pressure and was able to auto adjust pressure, so they swapped my machine and I have been with this ResMed S9 VPAP Auto ever since.
The reason for my post is I am only finding my central events staying high 40s to low 50s and my obstructive around 3 to 4 events.
I am not sure I am even in the right machine. I am hoping there might be others out there with similar issues who may have found that lowering the pressure support is worth trying or if my numbers look about right for someone with severe centrals and mild obstructive events.