Pressure pulses are sent to determine if the airway is open or closed. I think that how the flow rate changes in response to these pulses is used to make the determination of open versus closed. It could be that for some of the pulses the airway appeared open, and that for the others it appeared closed. Thus a determination couldn't be made.
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09-06-2013, 08:57 PM
(This post was last modified: 09-06-2013, 09:05 PM by awakeiam.)
Another thought about OA vs CA is something I just found out: I'm pretty sure I was getting false readings from my software, so now I take my readings with a grain of salt and I'm using how I actually feel as my 'gold standard'.
For instance, I just discovered I have a problem with air leaking out my mouth and the first night I used a chin strap all my 'CA' events disappeared. I think it's most likely that keeping my mouth closed made the software reporting more accurate, rather than the alternative theory that keeping my mouth closed 'cured' my CA.
So anyway, I'm tending to ignore weird little 'glitches' that turn up on the graphs, as long as I feel okay.
Further idea: With the chin strap my OA events have reduced quite a bit according to my software. I believe the results because it makes sense that when all the positive pressure leaks out though your mouth then there's nothing left to open the sagging airway.
What you say makes sense. In my case, I use a full face mask so I don't have a problem with leaking from my mouth, but as I tend to turn a lot, small leaks may be confusing the computer.
I seem to have given myself a serious case of tinnitus and have been backing down on the pressure. If it hasn't mostly cleared by Monday, I'll go see my ENT.
BTW, I noticed something interesting. The pressure varies up and down during the course of the night, but if I draw a trend line, it is moving upward. I'm not sure what that means.