Able to use CPAP Auto but not BiPAP

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
Artim Sequoia
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Able to use CPAP Auto but not BiPAP

Post by Artim Sequoia » Mon May 22, 2017 5:53 am

My wife is having trouble using her BiPAP machine. It doesn't adjust to her breathing pattern the way my CPAP Auto does. With my machine it is a very smooth transition and she is able to use it (when set to her pressure levels) with no problems but her doctor said that it "won't treat her condition". With her BiPAP even if set on spontaneous mode it doesn't seem to "learn" like my CPAP. Could it possible be a defective machine? Any ideas?

Wife's Machine:

Phillips Respironics BiPAP S/T, C-Series
Mode: S
Flex Control: On
Bi-Flex: 3
IPAP: 7.0
EPAP: 4.0
Ramp: Off

My Machine:

PR RemStar Auto

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Pugsy
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Re: Able to use CPAP Auto but not BiPAP

Post by Pugsy » Mon May 22, 2017 6:58 am

What is your wife's diagnosis?

Spontaneous doesn't mean the machine learns anything. I just means the breaths are from the patient as opposed from the Timed mode where the machine kicks in and breathes for you if you don't do so many breaths within a certain amount of time.

The PR System One C Series models were specialty models...usually for when people had more than plain jane obstructive sleep apnea.
Usually for when the problems were mainly central sleep apnea.

Has she actually used your machine all night? If so, what settings did you use and did you use available software to see the results.

I don't know if SleepyHead works 100% but worth giving C Series machines but worth trying.
https://sleep.tnet.com/equipment

None of these machines learn or remember anything like you might be thinking. It's our bodies and brains that do the "learning" and the adjusting.

If your wife's main complaint about the BiPap ST is the rhythm thing where it won't get in sync with her breathing...try playing with the other BiFlex settings...
or try turning it off so that you have more control over the timing with Rise Time....play with the rise time settings to see which feels more natural. They can make a huge difference in comfort.

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Artim Sequoia
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Re: Able to use CPAP Auto but not BiPAP

Post by Artim Sequoia » Mon May 22, 2017 7:08 am

Congenital Myopathy Fiber type disproportion syndrome as a result of a RYR1 abnormality
Nocturnal hypoventilation
Obstructive Sleep Apnoea
Scoliosis causing diminished lung capacity.
Mild Asthma

So far she has only used my machine during the day for a couple hours at a time to get used to it. We're going to try an overnight with it though and I'll have Sleepyhead primed to check it out. I'll also look into the Flex and Rise time settings on her BiPAP and see what we can figure out. Thank you!

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Pugsy
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Re: Able to use CPAP Auto but not BiPAP

Post by Pugsy » Mon May 22, 2017 7:26 am

Do give the other Flex settings a try as well as Rise Time.
You only get Rise Time options once Flex is turned off.
I am using a similar machine and I found that playing with rise time helped greatly in smoothing out the transition between inhale and exhale so that if felt much more in tune to my respiration.

Since your wife hasn't really slept with your apap we don't know that it really would have worked well all night for your obstructive sleep apnea issues. It can't treat the other stuff for sure.

Does her doctor want her to have so many breaths per minute and originally set the machine in Timed mode to get those breaths for sure?
And you made the change to S mode to try to help with the comfort issues?
If the doctor wants a for sure set number of breaths...you need to use the Timed mode. If he is okay with her breathing entirely on her own and the number of times she takes a breath then S mode is probably okay.
You can do the Flex experiments and play with Rise Time in Timed mode also.

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Re: Able to use CPAP Auto but not BiPAP

Post by ajack » Mon May 22, 2017 7:35 am

You aren't going to do a proper sleep study titration?
this is a resmed titration guide, but it may help
https://www.resmed.com/us/dam/documents ... lo_eng.pdf

image of page for bipap titration.
http://imgur.com/a/uPFuW

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Last edited by ajack on Mon May 22, 2017 7:38 am, edited 1 time in total.

Artim Sequoia
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Re: Able to use CPAP Auto but not BiPAP

Post by Artim Sequoia » Mon May 22, 2017 7:38 am

Luckily the doctor specifically said to use the S mode so we'll go from there.

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ajack
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Re: Able to use CPAP Auto but not BiPAP

Post by ajack » Mon May 22, 2017 7:44 am

If you are going to do this at home, I would also get an overnight o2 recorder. cms-50f on ebay from china for $50

the titration guide also covers the pressure support and lung volumes and flow. you are really going to need help setting this up, it's nothing like a cpap auto
I also found the respironics one
http://incenter.medical.philips.com/doc ... %3d9792335

I'm not knowledgeable enough, but people here and elsewhere are

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Re: Able to use CPAP Auto but not BiPAP

Post by palerider » Mon May 22, 2017 11:04 am

Artim Sequoia wrote:With her BiPAP even if set on spontaneous mode it doesn't seem to "learn" like my CPAP.
neither of the machines "learn" anything, they simply respond, so put that idea out of your head and work with what you've got.

try turning off biflex, it causes the pressure to vary in ways that often confuse people.

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