(08-17-2020, 11:44 AM)Sleepster Wrote: (08-16-2020, 05:24 PM)JJJ Wrote: Oh, and my settings are 15-25 with no ramp or other comfort and convenience features, so I also don't know if the above settings are what I should be using. Thanks in advance!
On that machine you have two levels of pressure, IPAP is pressure when you inhale, and EPAP is the pressure when you exhale. The difference between the two is the PS, which in your case is 4.
The machine lets you set the minimum EPAP, which in your case I'm guessing is 15. So that means you start the night with a EPAP of 15 and a IPAP of 19.
The machine also lets you set the maximum IPAP, which I'm guessing is 25. This means that as the sleep session progresses your IPAP may rise to as high as 25, and you EPAP would then be 21.
I don't think you need to mess with the other settings until you get these settings tweaked to meet your needs.
From OSCAR I see the PS is different between the Dreamstation and the S9 - i.e., the S9 is apparently fixed (currently at 4.0) and on the Dreamstation it seems to be set at a range of 2.0 to 8.0.
- Dreamstation: "Min EPAP 15.0 Max IPAP 25.0 PS 2.0-8.0 (cmH2O)," and EPAP min 15, IPAP min 17
- S9: "PS 4.0 over 15.0-25.0 (cmH2O)," and EPAP min 15, IPAP min 19
Now that I see those figures it explains why I've felt that the pressure on the S9 is higher. It looks like the PS can only be a fixed number on the S9, but can be variable on the Dreamstation. The higher IPAP pressure on the S9 doesn't really bother me, but I have a constant struggle with leaks, and the higher the pressure the worse it makes the leaks.
On both machines the PS is what the machine was set to when I got it. All I ever did was set the 15-25 pressures and turn off the comfort and convenience things. Here is some data from OSCAR for the last night on the Dreamstation (August 13) and the S9 (August 17):
Dreamstation (AHI 1.71)
EPAP 15.00 15.00 15.00 16.00
IPAP 17.00 17.00 18.00 19.10
PS 2.00 2.00 2.50 4.10
Minute Vent. 0.13 6.00 16.88 70.38
Resp. Rate 8.70 13.80 17.20 20.82
Leak Rate 0.00 16.00 56.00 60.00
Total Leaks 14.00 61.00 100.00 104.00
Snore 0.00 0.00 0.00 1.00
Insp. Time 0.20 2.44 3.70 8.74
Exp. Time 0.24 1.80 2.70 5.64
Tidal Volume 13.33 440.00 1160.00 5783.33
S9 (AHI 1.68)
EPAP 15.00 15.12 16.04 16.36
IPAP 19.00 19.12 20.04 20.36
Minute Vent. 2.00 8.13 12.95 30.00
Resp. Rate 2.00 15.00 17.80 31.40
Resp. Event 0.00 0.00 0.00 7.00
Flow Limit. 0.00 0.00 0.00 0.42
Leak Rate 0.00 0.00 31.20 45.60
Snore 0.00 0.00 0.06 0.22
Insp. Time 0.44 1.36 1.60 1.98
Exp. Time 1.00 2.58 3.36 10.00
Tidal Volume 200.00 540.00 880.00 2440.00
I have no idea what PS I should set these machines to, but I note that the with the Dreamstation set to a PS range of 2.0 to 8.0, on the 13th it started at 2.0 and never went over 4.1, with a 95% of 2.50. Looking at the past couple of weeks Dreamstation data the maximum PS never went over 5.50. I consider that data as kind of a titration, so maybe I should raise the PS on the S9. But if I do that the minimum IPAP will go up, but that will increase the leaks.
It's really hard to figure out how to tweak these things!