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Waveform questions - yankees123 - 11-10-2017
https://i.imgur.com/IcY3aci.png
https://i.imgur.com/KcfKqqE.png
Can someone explain exactly what is going on with these 2 waveform graphs.
The second graph appears as apneas but not flagged.
Thanks
RE: Waveform questions - pholynyk - 11-10-2017
I notice that those graphs are from the night the time changed... If you look at the graph an hour later (as I recall) I think you will find your events. Or open the Events tab in the left column, and scroll down, you should find them.
It's a difficult problem to solve - the flow graph has all the hours, but the local time starts repeating at 2:00 AM (in the fall) and the Events time line doesn't reflect that. I don't know if there is a graphing package that would show the local time jumps correctly. UTC for the win.
RE: Waveform questions - Fixit50 - 11-10-2017
In the first graph if you are referring to the jagged appearing waveform there are two threads I know of that have dealt with this matter or something very similar:
http://www.apneaboard.com/forums/Thread-Airsense-10-not-flagging-apneas
http://www.apneaboard.com/forums/Thread-Is-my-breathing-shallow?pid=212868#pid212868
The best I've found is that the bumpy, messy waveforms seem to be loosely connected with Flow Limitation that raises above about 0.33 on the Flow Limit graph. You can see this on your flow limit chart on the first waveform. Their are exceptions to this observation though so it may not be a sure-fire assessment of the problem. I have also found that if i can open my airway (decreases flow limits and corresponding decrease in therapy pressures) by using a chin strap to keep my mouth closed while using a FFM that the problem disappears or greatly subsides. Of course i don't like chin straps but it does work. I'm trying to discover what other ways (cervical collar maybe?? or ergonomical pillow, mouth piece...) there may be that would manually keep my chin up, mouth closed and also be more comfortable. I'm getting a new pillow today and will try it.
RE: Waveform questions - Fixit50 - 11-10-2017
Also, I remember reading somewhere that there are full face masks that go under the chin maybe to keep it the mouth closed. They look bigger. Don't remember where i saw that however.
RE: Waveform questions - yankees123 - 11-10-2017
I'm using the f20 large which actually fits pretty low. Also using a collar.
RE: Waveform questions - Fixit50 - 11-10-2017
(11-10-2017, 03:43 PM)yankees123 Wrote: I'm using the f20 large which actually fits pretty low. Also using a collar.
I have an F20 Large and an F10 Large. Neither do much to keep the mouth closed at least for me. The F20 seals better at high pressures than the F10 but it also makes quite a bit more air exhaust noise than the F10 which at times i find annoying.
What does the collar do for you? Never tried one but its on my mind. Do you notice that it decreases the pressure or the flow limits or anything good?? is it comfortable? Does it require any kind of special pillow?
RE: Waveform questions - yankees123 - 11-10-2017
I was recommended to try a soft collar to reduce obstructive apneas. I think it might have helped, not really sure.
RE: Waveform questions - Fixit50 - 11-10-2017
I wonder if one of those mouth guards would help maybe like this one:
Commercial Link Removed, Instead search Amazon for Serenity Sleep Mouth Guard.
For me, it would have to keep the mouth closed however and I don't understand how it would do that. If it does, I'll run and buy one!
As for your collar, you could try not wearing it and see if your AHI goes up or your pressures go up. If its, helping i would expect one of those things would happen.
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RE: Waveform questions - yankees123 - 11-10-2017
Good idea fixit 50.I wear a night guard for years but that's because I grind my teeth.
Will experiment with and without the soft collar.
RE: Waveform questions - HalfAsleep - 11-10-2017
Pad a Cheek makes a fuzzy band that attaches to the lower straps of an FFM and goes under the chin. It’s designed to keep the mask from floating upwards. I took this to mean it would in effect keep the mouth inside the mask, since it will keep the silicon/foam from riding up over the lower lip.
This does not address the posture problem, but it may help with floppy mouth.
Just a thought....