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How to set correct cpap setting using apap data
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Lanco Online

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Machine: Resmed S9 Autoset, Apex XT Fit
Mask Type: Nasal mask
Mask Make & Model: Apex Wizard 210 & Profile Lite, Wizard 220 FFM, Nuance
Humidifier: Resmed H5i
CPAP Pressure: 8.5-17
CPAP Software: ResScan SleepyHead Other Software

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Sex: Male
Location: Pensacola, Florida

Post: #1
How to set correct cpap setting using apap data
Average AHI : 2.3
Average Pressure : 8.8 cmH2O
Average 90th Percentile Pressure : 9.5 cmH2O
Average Leak : 55.4 lpm
Average Time with Large Leak : 3.1 min

This is my latest data covering 65 days. Using this I am wondering what I should set my constant pressure Cpap if I need to use it.

I had a sleep study 16 years ago. 13cmH20 was prescribed but I couldn't take it. It was then changed to 11 and checked with a thingy on my finger at home to make sure I was getting enough oxygen . And it was ok.

It turns out my old cpap was really putting out 11.7 or 11.8 at that setting. I also always until my new equipment used to let my mask leak a little because it was way too stuffy to breathe in and out otherwise.

I wonder if I should stick with say 11 or 11.5 or alter it after seeing my apap data.

I can say 12 or below is usually where I'm at but on a couple occasions I did bump up to 14 and 15ish. I am not counting a night or two when things went beserk and jumped to 20.

So, what do you think would be a good setting for the constant pressure cpap now?

Do i need to test on my apap in cpap mode and check that data and/or can you get enough of an idea with the info I've given here?
(This post was last modified: 09-14-2016 10:20 PM by Lanco.)
09-14-2016 10:18 PM
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Nusi Offline

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Posts: 2
Joined: Sep 2016

Machine: none
Mask Type: Full face mask
Mask Make & Model: resmed airlift f10
Humidifier: none
CPAP Pressure: 11
CPAP Software: SleepyHead

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Sex: Male
Location: australia

Post: #2
RE: How to set correct cpap setting using apap data
Hi. I am just at the stage of starting therapy and trialling some different CPAP devices. So I am new and keen, and doing a lot of research. I had a sleep study done and my pressure was determined by the technicians and doctor. I didn't think that you could "just change the pressure" you thought was correct. I also discovered that by trialling different machines and mask I am getting much more comfortable.
If you can try renting for a short time. I am not giving suggestions on what brands to use as I have found what suits me does not necessarily suit you.
I can see that the cost of getting the mask right, will be expensive.
Would like your thoughts.Sleep-well
09-15-2016 08:27 AM
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Sleeprider Online
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Machine: Resmed Aircurve 10 Vauto
Mask Type: Nasal pillows
Mask Make & Model: Resmed Airfit P10
Humidifier: Resmed Climateline
CPAP Pressure: Auto Bilevel 18/9, PS 3
CPAP Software: ResScan SleepyHead EncoreBasic

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Sex: Male
Location: Where they make Respironics

Post: #3
RE: How to set correct cpap setting using apap data
Lanco, fixed CPAP is normally set at the 90th percentile of pressure (amount equaled or exceeded 10% of the time). You might try a fixed pressure of 9.5-10.0 and see how it goes. If AHI remains controlled and you feel pretty good, that setting would be "by the book". If you have problems at what your machine has recorded long-term as the 90% pressure, small incremental increases to your comfort point would be in order.

______________________________________________
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09-15-2016 08:40 AM
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Lanco Online

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Posts: 153
Joined: Jun 2016

Machine: Resmed S9 Autoset, Apex XT Fit
Mask Type: Nasal mask
Mask Make & Model: Apex Wizard 210 & Profile Lite, Wizard 220 FFM, Nuance
Humidifier: Resmed H5i
CPAP Pressure: 8.5-17
CPAP Software: ResScan SleepyHead Other Software

Other Comments: Easy Compliance Software 3.2.1 and Easy Compliance Lite Software 3.4

Sex: Male
Location: Pensacola, Florida

Post: #4
RE: How to set correct cpap setting using apap data
Nusi

I see you live in Australia and that prices there are very high. I am aware of a number of people from Australia that have purchased their equipment from dealers on the US suppliers list on this site at huge savings. I would check that out.
(This post was last modified: 09-15-2016 02:58 PM by Lanco.)
09-15-2016 02:38 PM
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Lanco Online

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Posts: 153
Joined: Jun 2016

Machine: Resmed S9 Autoset, Apex XT Fit
Mask Type: Nasal mask
Mask Make & Model: Apex Wizard 210 & Profile Lite, Wizard 220 FFM, Nuance
Humidifier: Resmed H5i
CPAP Pressure: 8.5-17
CPAP Software: ResScan SleepyHead Other Software

Other Comments: Easy Compliance Software 3.2.1 and Easy Compliance Lite Software 3.4

Sex: Male
Location: Pensacola, Florida

Post: #5
RE: How to set correct cpap setting using apap data
(09-15-2016 08:40 AM)Sleeprider Wrote:  (amount equaled or exceeded 10% of the time)

not sure if i know what that means.

I thought I'd heard as you said to go by the 90% to come up with a fixed pressure setting but it actually doesn't make any sense to me as I commonly slip up to 12, 13 etc so is the idea just to get it as good as you can and let it go at that?

I also know that the higher you go it can about blow you away and that the fixed pressure for exhaling can become uncomfortable.

From what I have gathered it sounds like I could get either better or worse results at fixed pressure depending on the person. Is that right?
09-15-2016 02:56 PM
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Sleeprider Online
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Advisory Members

Posts: 3,369
Joined: Dec 2014

Machine: Resmed Aircurve 10 Vauto
Mask Type: Nasal pillows
Mask Make & Model: Resmed Airfit P10
Humidifier: Resmed Climateline
CPAP Pressure: Auto Bilevel 18/9, PS 3
CPAP Software: ResScan SleepyHead EncoreBasic

Other Comments:

Sex: Male
Location: Where they make Respironics

Post: #6
RE: How to set correct cpap setting using apap data
The 90th percentile pressure is the pressure that is equaled or exceeded 90% of the time; it is also the pressure that the CPAP stays at or below 90% of the time. Percentile is a common statistical term and it has more to do with frequency (time at pressure), than as a comparison to the maximum (0.9*Pmax).

When titrating for CPAP using an auto machine, the general recommendation is to use the 90th percentile pressure for constant CPAP pressure. What this means is that a pressure less than the maximum pressure is usually therapeutically sufficient and more comfortable for the user. I would expect the 90th percentile pressure to deliver comparable therapy to what the APAP delivered. Some people find fluctuating pressure to be disruptive, and those people tend to benefit from CPAP pressure. Others are sensitive to higher pressure and prefer to spend more time at a lower pressure and let the machine increase pressure only when needed. By setting a machine at the 90 percentile pressure, you will spend much more time at a higher pressure than using APAP; 90% more time. However you will not see the highest pressure the APAP would deliver 10% of the time. The trade-off is, the pressure is constant through the night and should become unnoticeable.

______________________________________________
Organize your SleepyHead Data
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09-15-2016 03:37 PM
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Lanco Online

Advisory Members

Posts: 153
Joined: Jun 2016

Machine: Resmed S9 Autoset, Apex XT Fit
Mask Type: Nasal mask
Mask Make & Model: Apex Wizard 210 & Profile Lite, Wizard 220 FFM, Nuance
Humidifier: Resmed H5i
CPAP Pressure: 8.5-17
CPAP Software: ResScan SleepyHead Other Software

Other Comments: Easy Compliance Software 3.2.1 and Easy Compliance Lite Software 3.4

Sex: Male
Location: Pensacola, Florida

Post: #7
RE: How to set correct cpap setting using apap data
Thank you Sleeprider. Very good answer that I can understand.
09-15-2016 03:48 PM
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FrankNichols Offline

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Machine: AirSense 10 Autoset
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Other Comments: I've figured out how to get my AHI down to 5, I quit sleeping!

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Post: #8
RE: How to set correct cpap setting using apap data
Also, I might add that unless the pressure changes are bothering you there is no compelling reason to switch to CPAP. And if the pressure changes are bothering you, you might want to try a smaller range first to see it that is tolerable before switching to CPAP.


EDIT: Well, that wasn't completely true, according to my sleep doctor there are some medical conditions that could indicate that CPAP would be preferable to APAP.

I am not a Medical professional and I don't play one on the internet.
Started CPAP Therapy April 5, 2016
I'd Rather Be Sleeping
(This post was last modified: 09-15-2016 04:08 PM by FrankNichols.)
09-15-2016 04:07 PM
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Lanco Online

Advisory Members

Posts: 153
Joined: Jun 2016

Machine: Resmed S9 Autoset, Apex XT Fit
Mask Type: Nasal mask
Mask Make & Model: Apex Wizard 210 & Profile Lite, Wizard 220 FFM, Nuance
Humidifier: Resmed H5i
CPAP Pressure: 8.5-17
CPAP Software: ResScan SleepyHead Other Software

Other Comments: Easy Compliance Software 3.2.1 and Easy Compliance Lite Software 3.4

Sex: Male
Location: Pensacola, Florida

Post: #9
RE: How to set correct cpap setting using apap data
Thanks Frank

Actually my main objective right now is to see how I should set my other cpap should I need to use it. But at the same time see if I like it better or have better results.

I admit I have some nights that I seem to wake up half the night but don't know if that has got to do with the changing pressures or if it's something none related but either way I need to try to narrow it down I'm thinking.
09-15-2016 04:32 PM
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Lanco Online

Advisory Members

Posts: 153
Joined: Jun 2016

Machine: Resmed S9 Autoset, Apex XT Fit
Mask Type: Nasal mask
Mask Make & Model: Apex Wizard 210 & Profile Lite, Wizard 220 FFM, Nuance
Humidifier: Resmed H5i
CPAP Pressure: 8.5-17
CPAP Software: ResScan SleepyHead Other Software

Other Comments: Easy Compliance Software 3.2.1 and Easy Compliance Lite Software 3.4

Sex: Male
Location: Pensacola, Florida

Post: #10
RE: How to set correct cpap setting using apap data
Also I though the changing pressure of the apap was suppossed to be good and give optimal therapy. If I change the pressures on the apap as suggested, Frank, or if I use the constant pressure cpap I'm thinking I may not get optimal therapy, but then again maybe it would help. Guess we don't know until I experiment with it some more.
09-15-2016 04:37 PM
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