Distinguishing Between "True" Centrals and SWJ

I've searched on the stickies and can't seem to find definitely info on this question. I'm trying to determine whether the events my machine is reporting as CA/central apneas are actually centrals, or whether they're post-arousal events that are being recorded as centrals.

I have two questions/requests:

• Can anyone who definitely knows they have/had central apnea post a SH chart that shows what a central looks like on the relevant data points? I'd love to see flow rate, flow limit, and any other relevant screenshots.
• Can someone take a look at these zoomed in screenshots from me to see if these look like true centrals or artifacts of being awake/rolling over/etc? And can you tell me what you're looking at that pointed you in that direction? In other words, regardless of whether they look like true centrals or sleep/wake junk, can you walk me through your thinking so I understand for myself what you saw in my charts? Thanks!

This is a random set of screenshots from the last few nights. All the recorded CAs look the same on the flow rate chart-- the small squiggly line before the flagged event. What does that tell us about the flow? If this were a true central, would it look like this? If not, what would a true central look like?

Here are a few more screenshots.

They all look like post arousal to me.

Have you seen Jason's videos on what to look for to help you decide what they are?
http://freecpapadvice.com/sleepyhead-free-software
Especially the bottom video.

Pugsy wrote: ↑

Tue Sep 25, 2018 4:07 pm

They all look like post arousal to me.

Have you seen Jason's videos on what to look for to help you decide what they are?
http://freecpapadvice.com/sleepyhead-free-software
Especially the bottom video.

I just watched all of them and it's actually quite hard to understand what's going on. Some look like they're definitely post-arousal but in other cases my breathing looks like it just stops after being semi-normal without weird ragged breathing.

Here's when it looks like I'm sleeping normally.


And here's what looks like a true central to my eye.



But if I zoom out, it's harder to tell what's happening. What does all this look like to you?

When you zoom in too close you can't see the irregularities of the flow rate as much.
The last image looks like arousal breathing to me but when you zoom in too close you lose the irregularities.
So you have to zoom in but not too much zoomed in.

It's also possible that you have some real centrals that end up causing arousals and then more centrals but instead post arousal centrals.
I think you need to be having a chat with your doctor.
Even if the bulk of those flagged centrals are SWJ post arousal centrals that still means that your sleep is crappy for some reason and there's a chance that there are enough real centrals to be messing with your sleep.
It's really hard for us when all we can see is a snippet here and there to know for sure what is going on.

Thanks, that's very helpful.

Two threads from same person trying to sort through same issues. Kind of makes things a bit confusing.
Let's use the other thread as it has more stuff already in it.
viewtopic.php?f=1&t=173081&p=1270069#p1270069

So this thread here will be locked and if you want to respond go to the other thread.