Help selecting pressure when changing APAP to CPAP . . .

hobbs · Post by **hobbs** » Sun Apr 06, 2008 2:59 pm

Five weeks of APAP gave me the following average;

Pressure= 11.7
AHI=4.4
AI=0.1
HI=4.3

The first week I had the machine it was set to CPAP (12cmsH20) with this average for the week;

Pressure=12.2
AHI=4.8
AI=0.0
HI=4.8

My original sleep study five years ago had me at 12cmsH20.

Set it back to 12, or a little higher to try to drop the HI?

I await the collective wisdom of the group.

Bearded_One · Post by **Bearded_One** » Sun Apr 06, 2008 3:34 pm

I'd try 12.5.

Guest · Post by **Guest** » Sun Apr 06, 2008 6:50 pm

Hi hobbs,
I don't think anything can be determined until we know your leak rate. If your leak rate is high, then the other numbers aren't reliable.
Why did you change to CPAP? Do you feel differently on either of them?

hobbs · Post by **hobbs** » Sun Apr 06, 2008 7:07 pm

Anonymous wrote:Hi hobbs,
I don't think anything can be determined until we know your leak rate. If your leak rate is high, then the other numbers aren't reliable.
Why did you change to CPAP? Do you feel differently on either of them?

Average leak rate is .06 L/s using a Resmed Activa mask. Going to try CPAP to see if I am one of the ones who do better on straight CPAP. I do not use EPR as I never had a problem exhaling against the machines pressure, once I got used to CPAP.

ozij · Post by **ozij** » Sun Apr 06, 2008 9:43 pm

What was your APAP range?

And how do you feel on cpap compared to APAP?

O.

hobbs · Post by **hobbs** » Sun Apr 06, 2008 11:15 pm

ozij wrote:What was your APAP range?

And how do you feel on cpap compared to APAP?

O.

APAP was 9-15 and tried 12-15 also. 9-15 gave a better AHI, 4.6 vs 5.2.

APAP averaged 0.1 AI, while the 1st week as CPAP set to 12 gave me a AI of 0.0.

Cannot say I noticed any difference in the way I felt with either one.

ozij · Post by **ozij** » Mon Apr 07, 2008 12:51 am

If you don't feel any difference, I don't think it matters.

I do wonder though at the better results you had when the APAP range had a lower bottom.

Based on that, I would probably take my cpap to a bit lower than 12, not to a bit higher. But thats very iffy, because the result could just be random variability. The most important thing is how you sleep, and how you feel.

O.