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CFlex + and EPR - what is the difference
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stephennic Offline

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Post: #1
CFlex + and EPR - what is the difference
Hi,
I noticed the philips has c flex+ settings and the resmeds has EPR settings what's the difference and how do they work?
Thanks
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Steve.
07-28-2016 10:14 AM
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Crimson Nape Offline

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Post: #2
RE: CFlex + and EPR - what is the difference
I can speak for Resmed only.

Resmed's EPR will reduce the inhale pressure setting (IPAP) by the value indicated for exhaling (EPAP). The value setting can range from 0 to 3. Each value represents the amount of reduction in cmH2O pressure (Set Pressure-EPR). The lowest possible pressure is 4cmH2O. This means that regardless of the EPR value, no exhale pressure can be below 4cmH2O.

Examples:
  1. A pressure range of 7-9cmH2O and an EPR of 3, the exhale pressure range would be 4-6cmH2O.
  2. Using the same EPR (3) and a pressure range 4-7cmH2O would provide an exhale pressure of 4cmH2O.


I hope this what you are looking for.

Statistics prove that people who have more birthdays live longer.
07-28-2016 10:53 AM
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RedSkip Offline

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Post: #3
RE: CFlex + and EPR - what is the difference
(07-28-2016 10:53 AM)Crimson Nape Wrote:  I can speak for Resmed only.

Resmed's EPR will reduce the inhale pressure setting (IPAP) by the value indicated for exhaling (EPAP). The value setting can range from 0 to 3. Each value represents the amount of reduction in cmH2O pressure (Set Pressure-EPR). The lowest possible pressure is 4cmH2O. This means that regardless of the EPR value, no exhale pressure can be below 4cmH2O.

Examples:
  1. A pressure range of 7-9cmH2O and an EPR of 3, the exhale pressure range would be 4-6cmH2O.
  2. Using the same EPR (3) and a pressure range 4-7cmH2O would provide an exhale pressure of 4cmH2O.


I hope this what you are looking for.

Crimson Nape et al,

Do you know how long it takes for the EPR to "kick in" on the ResMed units? I find when I first put the unit on, it's difficult to exhale, however as time progresses it gets easier. I'm curious if the computer needs to determine the exhale patterns, and so there is a delay in when the EPR starts...

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07-28-2016 12:53 PM
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Crimson Nape Offline

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Post: #4
RE: CFlex + and EPR - what is the difference
The EPR is instantaneous. You are describing your body adapting to the pressure increase. Others,as well as myself, have reported waking up and thinking the CPAP isn't working because we're no longer able to detect the pressure.

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07-28-2016 01:07 PM
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PaulaO2 Offline
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Post: #5
RE: CFlex + and EPR - what is the difference
One works by detecting the start or end of the inhale. The other works by detecting the start or end of the exhale. I can't remember which does which.

Some people feel that the xFlex is breathing for them, predicting their next breath and they don't like it. It feels forced. On the other hand, not many people notice the change of EPR other than it is easier to breathe out.

Both drop/increase from 1 to 3 cmH2O.

It all comes down to algorithm and rhythm.

And aliens.

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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
07-28-2016 04:16 PM
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RedSkip Offline

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Post: #6
RE: CFlex + and EPR - what is the difference
(07-28-2016 01:07 PM)Crimson Nape Wrote:  The EPR is instantaneous. You are describing your body adapting to the pressure increase. Others,as well as myself, have reported waking up and thinking the CPAP isn't working because we're no longer able to detect the pressure.

Crimson,

Interesting you mention waking up and thinking it's not working/on. I've had that same experience...makes sense my body is being conditioned within the first few minutes.

Appreciate the feedback.

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07-28-2016 04:20 PM
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OpalRose Offline

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Post: #7
RE: CFlex + and EPR - what is the difference
Interesting thread comparing AFlex to EPR. Even though you are asking about CFlex...I'm not exactly sure how that works compared to AFlex.

http://www.apneaboard.com/forums/Thread-...#pid145923

OpalRose
07-28-2016 04:55 PM
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cands Offline

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Post: #8
RE: CFlex + and EPR - what is the difference
(07-28-2016 01:07 PM)Crimson Nape Wrote:  The EPR is instantaneous. You are describing your body adapting to the pressure increase. Others,as well as myself, have reported waking up and thinking the CPAP isn't working because we're no longer able to detect the pressure.

Thanks for sharing this. I am 7 weeks in with pressure range from 11 to 17. I have just started experiencing this. It is rather nice!Smile
07-28-2016 06:11 PM
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PaulaO2 Offline
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Post: #9
RE: CFlex + and EPR - what is the difference
All the xFlex are essentially the same, just different because of the machine they are on. C-Flex is on the CPAP machines, A-Flex is on the APAP machines and B-Flex is on the BiPAP machines.

Oh, and the wiki 'splains the differences.
http://www.apneaboard.com/wiki/index.php?title=Exhalation_Relief

PaulaO2
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
07-29-2016 04:18 AM
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OpalRose Offline

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Post: #10
RE: CFlex + and EPR - what is the difference
EPR (ResMed machines) drops exhale pressure by corresponding number:
EPR 3 = 3cm drop in pressure
EPR 2 = 2cm drop
EPR 1 = 1cm drop.

AFlex/CFlex (Respironics machines) works a little differently.
A-Flex of 1, 2 and 3 all have a max of 2cm of straight pressure drop but have different amounts of additional Flow-based pressure drop.

There is a difference on when it gives the pressure relief when using the different settings.

This thread which vsheline gives a fairly good explanation of how it works.
http://www.apneaboard.com/forums/Thread-...#pid145923

I personally have never received more than 1.5cm pressure relief regardless of the setting I use, and SleepyHead confirms this. It is based on flow and how hard a person exhales. I believe I'm a shallow breather.

OpalRose
(This post was last modified: 07-29-2016 07:56 AM by OpalRose.)
07-29-2016 07:53 AM
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