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wildly jagged flow rate curves -- do you see this in your data?
#41
RE: wildly jagged flow rate curves -- do you see this in your data?
The only way you may learn more about this is by video recording or some other form of data. This was probably just a bad night with period of neck kinked due to position on pillow or something along those lines.
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#42
RE: wildly jagged flow rate curves -- do you see this in your data?
I'm thinking about designing some sort of gear to try to measure flow rate without having a cpap machine in the mix. What I'm toying with is to use an F30 mask because it has a large opening in front because the hose connects there. If I put airflow sensors on the mask then I can sleep with it and record data without a cpap machine involved in the loop, and just take straight breathing data.

One thing that I did think of with respect to the "stuttering" breath patterns -- I wonder if there is any possibility that the mask is shifting around and messing up the data collection from the CPAP? Specifically I'm looking at the F30 cushion and seeing that the nose opening is divided into two holes. If the mask were to get pushed over so that the little divider was going across one nostril, then I wonder if air bouncing off the divider -- from both the machine side and from inside the nostril -- is a big enough signal to get detected by the sensors in the machine? That little divider isn't on the other masks I've been wearing over the years when I've seen this signal, so that's not a complete explanation. (My other 3 FFMs are the F10, Amara View, and Dreamwear. I don't trust this data for this purpose when wearing anything other than an FFM, because there is no way to know if air is coming out of my mouth.)
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#43
RE: wildly jagged flow rate curves -- do you see this in your data?
Have you recorded it on camera? That would be much easier and more likely to figure this out.
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#44
RE: wildly jagged flow rate curves -- do you see this in your data?
Yeah, I know... too many projects going on here. Hubs is going to bring home the camera that they were using for some experiments a couple of years ago...
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#45
RE: wildly jagged flow rate curves -- do you see this in your data?
Last night I had 10 minutes of "WTF was that?!?"

   https://www.dropbox.com/s/mgz6cp1001671v...F.png?dl=0

What is striking is that there is quite a bit of leak during this period. Awhile later, some jaggy, but not so totally insane, and no leaks.

   https://www.dropbox.com/s/ehxn27gti10e2s...s.pdf?dl=0

Maybe the leaks are confusing the data collection?

I'm pretty confused by it all...
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