APAP acting like a CPAP?

Hello to the board! I haven't been on the board for a while as CPAP life has (fortunately) gone quite well. However a rash of little issues have arisen recently and I know this board has been ever so helpful.

This screenshot happened last night. Am I seeing this correctly? I changed my upper pressure from 10.6 to 12. The machine remained set on APAP mode as evidenced by the machine settings on the left. But the graph looks as if it remained on straight CPAP mode at my set minimum of 8.6?

What's up with that?

http://imgur.com/iEZUby7

(I've posted actual screenshots in the past, but now I'm getting an Error 15 message so can only post the link)

I have no idea Wait for Pugsy.

Looks like the algorithm did not determine that a pressure increase would have helped you at any point. Your min pressure was adequate 100% of the time! If you think that you'd be a more comfortable at a lower pressure, see if you can lower the min.

DanceDiva26 wrote:Hello to the board! I haven't been on the board for a while as CPAP life has (fortunately) gone quite well. However a rash of little issues have arisen recently and I know this board has been ever so helpful.

This screenshot happened last night. Am I seeing this correctly? I changed my upper pressure from 10.6 to 12. The machine remained set on APAP mode as evidenced by the machine settings on the left. But the graph looks as if it remained on straight CPAP mode at my set minimum of 8.6?

What's up with that?

http://imgur.com/iEZUby7

(I've posted actual screenshots in the past, but now I'm getting an Error 15 message so can only post the link)

The data shows no flow limitations and my understanding is that pressure varies with FL so that might explain why pressure did not alter. Give it a little time to see what happens. The AHI is very good so wait and see.

I am sitting here scratching my head over this one.
ResMed machines don't normally just sit there and twiddle their thumbs like that.
There are some Flow limitations because the max value shows 0.49 but there probably wasn't much. The machine also is supposed to respond to OAs, hyponeas and snores...so not just FLs.

The only times I have seen auto adjusting machines act like fixed pressure machines has been in the face of massive large leak but that's obviously not the case here.

I think I might be tempted to restore the factory defaults and then go set things again.
I have never seen a ResMed machine sit there and do absolutely nothing like that.

There were OAs and that surely would have pushed the IPAP pressure above the 8 that you've got set as your minimum. It's a bizarre set of data.

Hmmmm.....if Pugsy is flummoxed....I'm in deeeep trouble! It is a bizarre set of data....The next night, I re-checked all my settings...A-OK...so went to bed happily assuming that all would be right in my CPAP world in the morning. Just a fluke. Alas...not so. I plugged in my card, imported data....and NOTHING!. Although I had pushed the Info button upon waking and saw that I had a good AHI and green smiley face (which confirmed that I had in fact breathed and lived through the night (laughing).....NO data had been recorded.

It's either those aliens-that-steal-into-CPAPS-at-night that Pugsy speaks of....or else that solar eclipse turned my machine into a lunar-tic CPAP!

Sooo---the next night, I unplugged everything...the AC cord from the wall and from the machine to "de-flood" it for several hours, checked the outlet with other appliances, unplugged/washed the hose, changed and re-seated the filter compartment, cleaned out the humidifier, washed all masks. And I spanked my pink machine and demanded that she behave. Yes I know....not all of it necessary...but my maintenance routine had been sorely lacking anyway.

Soooo...for the next 3 days....My AHI went back to "my" normal levels < 1.0>!! Yay! I'm happy, but don't truly trust those numbers yet. I'll keep an eye on it for a while still.

From D.H:
"Looks like the algorithm did not determine that a pressure increase would have helped you at any point."

D.H - My titrated study pressure 9 months ago was determined to be 8.0...but since I have an APAP, I played with the settings and found that 8.6 min and 10.6 max worked quite well for me for 6 months. I was hitting 10 a lot and always had AHIs <1, and 0.0 many times.

But in the last 3 months my AHI fluctuated wildly. I hit 6's an 5's an 4's. Still had quite a few <1 but gee....there were wild swings from day to day over the span of those 3 month, which is why I made the recent move to increasing the max to 12. However, I think I know the reason for those swings. (Which I may elaborate on in another post when I have more time)..So I didn't trust those past high numbers as correct, and I still don't trust the low numbers yet.

Oh...and last night I had 0.0, but I also had my first Central ever...(but there was in fact an OA right after it...so not to worry...right?)

DanceDiva26 wrote: I also had my first Central ever...(but there was in fact an OA right after it...so not to worry...right?)

A random Central and a random OA.....I never worry about anything random.
I also never worry about ugly numbers if they are rare and aren't consistent.

Not long ago I decided to build a wall to make sure I stayed on my back. Not so much because supine sleeping makes any difference in my OSA or pressure needs but because I was trying to stay off my back because when I end up on my back my back hurts like hell and wakes me up and it's the wake ups I didn't want to have.

So then I wake up to this report. I am still scratching my head over it. The night before the AHI was less than 1.0 and the night right after this night the AHI was less than 1.0.
But I had this ugly monster below. I went to bed on my right side and woke up on my right side and I don't think I ever turned over at all.
This machine doesn't separate centrals or OAs. They both go into the "apnea" basket and SH just flags as UA since the machine doesn't tell them apart. I am reasonably certain they were all OA though. I rarely ever have centrals and these didn't look central to me anyway. Since this was a random fluke night and hasn't been repeated and I had been using this machine since Feb and never had anything like this show up I just shrugged my shoulders. About a week later I again changed machines and I am now using the AirSense 10 for Her machine. Still haven't seen anything anywhere near this ugly and I am using even less pressure. Go figure.

Pugsy, that's the same effect that DD26 had. Surely those Hs at 4:30 should have affected your pressure graph.

Holden4th wrote:Pugsy, that's the same effect that DD26 had. Surely those Hs at 4:30 should have affected your pressure graph.

That report is from a fixed pressure bilevel machine....it has no option for allow for pressures to auto adjust in any manner at all.
It's behaving just as expected. Yeah...if I had been using an auto adjusting pressure mode...the pressures would have changed.
My point with the report was to just share that sometimes crap happens and we don't know why.
The night before and the night after the AHI of 10 night I saw AHI of less than 1.0....and I changed nothing at all during any of those nights in terms of any settings on the machine...and I didn't take more or less of any meds...nothing at all that I could figure out to explain the ugly night...except crap happens or the aliens abducted me again.


Now to see straight lines in terms of pressure like mine above...when in auto adjusting mode of anything...something is not right. In my case...nothing was wrong because there is no auto mode at all on the machine I was using for that report.