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Can such periods of variable breathing and corresponding SpO2 swings be avoided? - 2SleepBetta - 05-21-2020
Please advise what might be done to correct this variable breathing and the apparently consequent swings (up to 8% variation) in SpO2.
Thank you for looking at this and any help suggested.
2SB
[attachment=23117] [attachment=23118] [attachment=23119]
RE: Can such periods of variable breathing and corresponding SpO2 swings be avoided? - OpalRose - 05-22-2020
You will get some responses if you can revise your graphs according to the directions in the link in my signature line on Chart Organization.
We only need to see:
Events
Flow rate (Include a 2 minute segment of variable breathing)
Flow Limits (ResMed only)
Pressure
Leaks
RE: Can such periods of variable breathing and corresponding SpO2 swings be avoided? - Hydrangea - 05-22-2020
I'm also curious as to which mask you are using.
RE: Can such periods of variable breathing and corresponding SpO2 swings be avoided? - 2SleepBetta - 05-23-2020
(05-22-2020, 09:38 PM)Hydrangea Wrote: I'm also curious as to which mask you are using.
The P-10 is my favorite mask I have used for at least the past year, Brevida is a close second. Am pleased to use both as a mouth breathing side sleeper.
Re OP:
I include here a not very revealing 2 min 38 sec snip that shows 3 nodes, but not much else, absent those other (confusing?) parameters in the OP graphics. The variable breathing is prominent but intermittent most nights. A lot of the time, as is true below, the FL and Snore and Leak are all minimal, giving rise to my inquiry.
In the OP the 20 minute and full night graphics present two problems, my breathing and my graphics in that OP. (However, I inadvertently duplicated the 20 minute graphic instead of posting in the OP my earlier 2+ minute one, which would have been just as confusing and unacceptable with similar graphics.) But I still think the SpO2 graphics are relevant to the core question, if not the other graphs I've routinely prepared, found helpful and included in OP. For example It's been great getting position and acceleration directly into OSCAR (thanks to pholynyk, sawinglogz and Somnopose), instead of pasting OSCAR screen shots into Excel and having to match scales to get a synched-motion picture. Those graphs keep hammering home the point that I have to prevent anything near supine sleep, can't get rid of my stopper.
[attachment=23164]
Other:
I think the inhale and exhale times and ratio may prove relevant, but I only recently began looking at them as I blunder forward on this next challenge, variable breathing.
Checking it out before sending it to a xPaPer friend, I happened to use my Autoset rather than Vauto last night and, wow, lots of FL showed up and is reflected in FR and SpO2 curves. I wonder if the Vauto algorithm or other device efficiency differences account for that (both operating at close to the same 95% pressures except EPR is 3 and PS 4). I notice that the Autoset varies pressure a lot more often than the Vauto.
No time now to find and post today's findings of papers dealing with a connection--surprising to me--between higher fitness and highly variable PR (HRV) as an indicator of that. All puzzling to me (probably a rabbit trail) but with a rate adjusting pacemaker holding me at a minimum setting of 60 BPM (instead of 38 to 40 as my bradycardia is without PM in sleep), I wonder if--aside from benefits of having that device--it may be suppressing or interfering with what would be natural higher HRV and it shows up in nodes that are often-synchronized but 180 degrees out of phase with dips in SpO2. One paper deals with gains in the HR FR control loop and points out how instability can arise; interesting stuff.
In upcoming visits to cardiologists I'll bring representative graphics and go over the SpO2 variability and amplitude as well as questions about the CO2 and pressure signal control loop from the heart's sensors, the sympathetic system's role.
Thanks for responding, Hydrangea,
2SB
RE: Can such periods of variable breathing and corresponding SpO2 swings be avoided? - OpalRose - 05-23-2020
2SleepBetta,
For the most part, just looking at your graphs and numbers, the low AHI would suggest you are well treated, but we all know that a low AHI doesn't tell everything, and certainly doesn't reflect how we feel.
There are definitely dips in your oxygen level during the night. Are you on supplemental oxygen? Possibly something to talk to your cardiologist about. I would print out a couple graphs for him to look. Try to line up where your oxygen level dips with the flow rate graph. You breathing does seem labored.
I wish I could help more, but hang in there. Someone with more knowledge will be able to advise.