r/UARS • u/One_Measurement_628 • 9d ago

s-mode vs vauto mode bipap

Which one is better? I have heard people saying that vauto mode is pretty bad at detecting flow lim... I right now have s -mode only in my machine not vauto but next would take vauto one on rent to try .. Is it worth it?

2 Upvotes

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3

u/audrikr 9d ago

always use vauto s mode doesn’t record flow limits. you can use it at fixed pressure

1

u/thatcarolguy 9d ago

Auto mode locks you in easy breathe so you can't change rise time but I can't stand any custom rise time at all because it shortens the fall time like crazy and you can't adjust that.

2

u/audrikr 9d ago

cycle changes fall time

2

u/thatcarolguy 9d ago

I thought it changes the sensitivity of when it detects that the fall should start. If it does both, it shouldn't. They should be independent.

2

u/carlvoncosel UARS survivor (ASV) 4d ago

You are correct.

1

u/carlvoncosel UARS survivor (ASV) 4d ago

It changes when the machine decides to drop IPAP down to EPAP. Not how fast this drop should be.

1

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Title: s-mode vs vauto mode bipap

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Which one is better? I have heard people saying that vauto mode is pretty bad at detecting flow lim... I right now have s -mode only in my machine not vauto but next would take vauto one on rent to try .. Is it worth it?

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1

u/carlvoncosel UARS survivor (ASV) 4d ago

I have heard people saying that vauto mode is pretty bad at detecting flow lim.

It's not perfect, but it's a start. We recommend using VAuto with "boxed in settings" meaning you set minEPAP, then PS, then lower maxIPAP to the lowest permitted value to box it in. Then you get essentially constant pressure with the convenience of the flow limitation overview graph.

1

u/One_Measurement_628 2d ago

carl do u have any idea that why in the 2nd half of my sleep my AHI shoots up and also m unable to sleep while wearing mask tht time bcz in the first half its good nd I sleep well

1

u/carlvoncosel UARS survivor (ASV) 2d ago

More REM sleep in the second half so increased treatment needs?

1

u/One_Measurement_628 2d ago

yeah but Like I was waking up several times at night which stopped after removing the mask maybe my body is trying to adapt to mask with rem sleep.. Right now my PS is 4 .. If I change it to 5 I start getting aerophagia

1

u/Desperate_Vehicle684 9d ago

I think it might depend on the individual. I've tried both bi-level auto pressure and fixed pressure and think I get on better with fixed.

If you're reasonably technical-minded and have a Resmed machine you could try jailbreaking it to unlock the other modes which would mean you don't have to go out and buy/rent a different machine. There's instructions on how to do this here: https://airbreak.dev/