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Great AHI #s. Feeling tired.
#11
RE: Great AHI #s. Feeling tired.
I don't know that much about PR flex but the idea behind it is that it creates a pressure differential between inhalation and exhalation which increase flow rate.

You have no obvious apnea or hypopnea so the only way you currently have sleep disordered breathing is if it is due to flow restrictions and RERA's. Increasing flow rate can help overcome flow restrictions and avoid RERA's if they are an issue (in which case should see fewer of the spikes in flow rate).

One of the reasons many users prefer Resmed machines is because they more aggressively attempt to treat flow limitations. Your PR machine is slower to react to these types of restrictions. It isn't clear what exactly is causing your pressure spikes but I am guessing mostly snore (graph cut off) and some flow limitations and RERA's. Would need some zoomed in screen shot of breathing just prior to pressure increases to understand what is triggering them.
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#12
RE: Great AHI #s. Feeling tired.
Does Variable Breathing explain the spikes in my pressure charts?

I founds this in the Oscar Wiki: Variable Breathing

According to Oscar I had 22 variable breathing episodes last night.  Over the last month my numbers show at least 9 a night and up to 22 a night.  The wiki goes on to say: "variable breathing caused by flow limitation over-rides the auto-pressure algorithm resulting is an unresponsive Auto CPAP".

I'm still confused.
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#13
RE: Great AHI #s. Feeling tired.
I've attached my latest Oscar numbers from last night.  I added an event flag for Variable Breathing, and expanded the resolution so you can see more data panes.  I can zoom in on any of the events if that will help with assessments.  The only thing I can discern is that when the Dreamstation is flagging Variable Breathing events, the auto pressure algorithm appears to flat line as per the Wiki: variable breathing caused by flow limitation over-rides the auto-pressure algorithm resulting is an unresponsive Auto CPAP .

It's 4pm local time and I feel exhausted and eyes heavy.


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#14
RE: Great AHI #s. Feeling tired.
The attachment in this post is zoomed in to just before a variable breathing event is flagged.  The period shown here is about 2 minutes long:

   
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#15
RE: Great AHI #s. Feeling tired.
I guess my mention on the spikey pressure trace was it looks like it's uncomfortable. Maybe it's not. Flex can be used at 1 or 2 if you'd like to try it. It's supposed to be similar to ResMed's EPR but Respironics buried details on Flex in corporate murky secrecy. However we know ResMed's EPR is definitely dropping 1, 2, 3 cmH2O when set respective to these numbers.
Dave

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#16
RE: Great AHI #s. Feeling tired.
I don't know the particulars about variable breathing but you can see that it is being flagged around periods where you have spikes in flow rates. My guess is it is being triggered by both the flow limitations that are obviously present (in that zoomed in view) and perhaps also the arousal breathing that now seeing the flow limitations could very well be RERA's.

Your best bet right now is to try flex to see if that makes any improvement. Try combing through your data before and after doing so to try and understand if flex appears to be improving your flow limitations.

See here for a bit more info on flow limitations.

http://www.apneaboard.com/wiki/index.php...ep%20apnea.

And RERA's

http://www.apneaboard.com/wiki/index.php...erapy#RERA
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