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+--- Thread: Spiky flow chart? (/Thread-Spiky-flow-chart)
Spiky flow chart? - CurledTwig - 09-01-2022
Hey folks,
Been lurking here a while.
I'm attaching last night's charts. This is sort of a typical night for me. AHI is pretty good (usually under 2), but my flow rate chart always looks messy compared to other people's, and I'm a bit worried about the flow limitations.
Oh, and in case the side bar wasn't clear: currently on 7cm with EPR on 2.
Any advice would be greatly appreciated, thanks
RE: Spiky flow chart? - clownbell - 09-01-2022
Until a bona-fide expert comes along, I will venture to suggest EPR should be 3 to treat flow limitations and hypopnea. That said, your flow limitations and hypopnea are not bad. I have read advice that flow limitations should ideally be under .10 and you are well below that threshold. How do you feel?
Also I wonder how long you have been on PAP therapy. The centrals may be treatment-emergent, in which case the wouldlikely decrease over time.
RE: Spiky flow chart? - CurledTwig - 03-30-2023
I've since switched to somewhat higher pressure (10cm) and a full face mask (dreamwear), which greatly improves my leak rate and snoring. The machine suggests the AHI is now very low (<1), but the waveform remains spiky. I don't feel super rested when I wake up (but I also don't feel bad).
I've tried increasing the pressure a bit more, but then I basically fart myself awake all night, which is not much better than regular suffocation
Would be grateful if someone could shed some more light on this situation, thanks!
RE: Spiky flow chart? - EddyDee - 03-31-2023
Last year you were using an Elite model, which is a fixed CPAP-only machine. This year you have an Autoset, which is a full APAP, but you're using it in CPAP mode. Is there a reason why? Did you have a titration study in a sleep lab which recommended 10cm H2O?
Can you post a zoom in to some 3 minute samples of spikiness? Note also that the y-axis scale is a factor. Do you have OSCAR set to default scale on the flow rate graph?
This should help while an expert shows up
RE: Spiky flow chart? - CurledTwig - 03-31-2023
I'm attaching a couple of 3 minute (or thereabouts) samples.
I have two devices, an airsense 10 elite and an airsense 10 autoset. I use one at home, and the other at my girlfriend's place. It was easier to buy a second one than to keep lugging it around. And for some reason, buying the autoset was cheaper than the elite.
The pressure is an ongoing experiment. I increased it because I'm often congested, and it seems to help getting the AHI down to <1 on most nights.
I'm not sure what the oscar default scaling on the y-axis is or how I can change it. When I have a look around on the forum it seems like the y-axis scale differs widely across screenshots :O
Thanks!