BiPAP rise time vs CPAP EPR question

[entropyess]

Hi,

Quick question:
I am seeing that BiPAP machines have a "rise time" setting, allowing for flexibility in how quickly the pressure rises at the beginning of the inhale. Does anyone know how quickly the pressure increases when using EPR with a CPAP?

More info/background:
I started on the resmed airsense 11 about 3 months ago and have struggled with aerophagia. I found tons of great advice on this forum and have managed to minimize the discomfort but it's still not great. I am currently using a steady pressure of 6 with EPR set at 1. I am getting good low AHI numbers but I feel a little "air starved" at this low pressure. I have tried increasing the pressure and EPR but the problem I have then is that, I feel like the pressure doesn't kick back up quickly enough at the start of my inhale, like I have to really put effort into the inhale for a split second. I am looking into switching to a BiPAP to see if it is any better but I am wondering if there would be any difference in my perception of how quickly the inhale pressure increases.

Thanks!

[palerider]

Hi,

Quick question:
I am seeing that BiPAP machines have a "rise time" setting, allowing for flexibility in how quickly the pressure rises at the beginning of the inhale. Does anyone know how quickly the pressure increases when using EPR with a CPAP?

More info/background:
I started on the resmed airsense 11 about 3 months ago and have struggled with aerophagia. I found tons of great advice on this forum and have managed to minimize the discomfort but it's still not great. I am currently using a steady pressure of 6 with EPR set at 1. I am getting good low AHI numbers but I feel a little "air starved" at this low pressure. I have tried increasing the pressure and EPR but the problem I have then is that, I feel like the pressure doesn't kick back up quickly enough at the start of my inhale, like I have to really put effort into the inhale for a split second. I am looking into switching to a BiPAP to see if it is any better but I am wondering if there would be any difference in my perception of how quickly the inhale pressure increases.

Thanks!

EPR has a rise time that's roughly equivalent to the amount of time it take you to inhale.

If you're feeling "air starved" then just *increase your pressure".

EPR of 1 is insignificant as far as the pressure change. try a pressure of 9 with EPR3.

[Rubicon]

I am seeing that BiPAP machines have a "rise time" setting, allowing for flexibility in how quickly the pressure rises at the beginning of the inhale. Does anyone know how quickly the pressure increases when using EPR with a CPAP?

Seems to me the answer would be "not very":

[Rubicon]

Although I think EPR has changed from when it was first introduced:





Does anybody have an Oscar download from an S8 with EPR 3? When it first came out, I thought EPR actually terminated just prior to initiation of inhalation.

[palerider]

Here's an example of EPR 3, and PS3, with and without EasyBreathe™

[Rubicon]

Can you pair those pressure waveforms with their respective flow waveforms?

[Rubicon]

I posted some waveforms when EPR first came out, before it was released to the public, and of course they're lost. While it was close, it seemed like at the time the trigger was end exhalation, not the initiation of inspiration. Can only look at the cartoons now:



I suppose that's academic, compensation for adding EPR is pretty much mandatory now, and if it technically wasn't bipap then, it is now.

Bipap Bipap Bipap Bipap Bipap Bipap Bipap Bipap Bipap Bipap Bipap.

[chunkyfrog]

Such language!
My daddy woulda whipped out the Lifebuoy for your nasty mouth!
Mom would not let him use the Lava--it will scratch your teeth.

[entropyess]

Interesting, thanks! I hadn't thought to zoom in on those graphs. When I had the EPR set to 3, the mask pressure doesn't even start to increase until about halfway through my inhale. It looks like BiPAPs can be set for a rise time of 100 ms to 600 ms, does anybody have a flow rate and mask pressure chart of what that looks like?

To clarify, I can't increase my pressure without worsening the aerophagia, and I can't increase the EPR setting without worsening the feeling of over-efforting at the start of my inhale. So my supposition is that, IF BiPAP can increase the inspiratory pressure more immediately than EPR (minimizing over-efforting), then I can increase my pressure (minimizing feeling air-starved) while keeping the expiratory pressure low (minimizing aerophagia) and win at PAP therapy!

[palerider]

Can you pair those pressure waveforms with their respective flow waveforms?

Not without going back and re-creating them. But the pressure rise started at the initiation of inhalation and the pressure peaked at the end if inhalation.

[palerider]

Can you pair those pressure waveforms with their respective flow waveforms?

I've got this, if it helps:


Here's an easybreathe vs non, (with fast rise time).