RE: Does this look normal? [flow data]
maybe leak lags flow on a breath by breath basis but if there's a leak it'll show and if it's a related leak it should show up in close proximity to the flow in question, particularly as the flows in question are a few seconds long.(?) may not be definitive but a potential indicator. guess we'll have to see the leak graph to know. don't mean to distract from the initial question at all. I think we're still on topic, trying to weigh competing explanations.
RE: Does this look normal?
(09-03-2018, 08:10 PM)vsheline Wrote: It may be instructive to see the waveforms for Flow and Leak shown next to each other for easy comparison.
Here's a shot of my flow rate and leak rate:
[attachment=8079]
(09-03-2018, 08:10 PM)vsheline Wrote: In my view, the Flow waveform shown in allenri’s posted data indicates an obstructive condition during exhalation (while EPR would be reducing pressure), because it looks to me like airway restriction is interfering with his exhalations.
A few things:
- I don't use EPR (except for ramp)
- I feel like my leak situation is pretty good. (i.e. not too many leaks)
- I don't think I'm leaking from my mouth outside of my full face mask. I'm not sure how I'd do that ...
- I DO feel like my throat closes off a fair amount when I exhale through my nose into my mask. It can happen more than once when exhaling a single breath. I'll be exhaling through my nose, and then something in the back of my throat closes off, and then the air stops, and my F20 mask makes a sort of clicking sound. My sense is that this happens mostly during ramp, but maybe it happens all the time. I'll try turning ramp off tonight to see.
09-04-2018, 09:03 AM
(This post was last modified: 09-04-2018, 10:22 AM by allanri.
Edit Reason: Spelling error
)
RE: Does this look normal? [flow data]
I spent a minute to two after putting my mask on last night trying to recreate the feeling of my throat closing off the airway through my nose while exhaling. Here's what it looks like:
[attachment=8085]
I think this happens quite a lot throughout the night.
P.S. Ignore the AHI. Sleepyhead is not noting events from part of my night, because of that importing bug I reported in a separate thread.
RE: Does this look normal? [flow data]
ok, well, I'm in way over my head; I'll leave it to others to decipher. looks like leak was between about 13-20, not quite redline at peak but leakage nonetheless. still, you'd think a leak big enough to produce a flat line in the absence of an obstruction would be over the redline. wondering if it can't be both an obstruction and a leak. waveform (and allen's description) looks (sounds) a bit like yrnkrn's palatal collapse. see last page of this thread:
http://www.apneaboard.com/forums/Thread-...ht=palatal
