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Upper pressure setting on a CPAP Autoset machine
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vsheline Offline

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Posts: 1,907
Joined: Jul 2012

Machine: S9 VPAP Adapt (USA Model# 36007, not better 36037 or 36067)
Mask Type: Full face mask
Mask Make & Model: F10 or SimPlus w/ 2Liners. MirageQuatro & Gecko gel pad
Humidifier: H5i
CPAP Pressure: 15 EPAP, PS 5-10
CPAP Software: ResScan

Other Comments: Marfan Syndrome, chronic bradycardia, occasional Cheyne-Stokes Respiration

Sex: Male
Location: California, USA

Post: #11
RE: Upper pressure setting on a CPAP Autoset machine
(05-17-2015 05:57 AM)player Wrote:  Can higher pressures cause air to be pumped into the stomach?

Definitely.

It is called aerophagia and is a very common reason people find they need to lower the Max Pressure setting.

Lowering the Max Pressure may not treat obstructive apneas/hypopneas as well but sometimes the settings must be lowered to avoid causing worse conditions.

Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.
(This post was last modified: 05-17-2015 02:21 PM by vsheline.)
05-17-2015 02:16 PM
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Programmer Offline

New Members

Posts: 2
Joined: May 2015

Machine: Resmed S8 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Resmed Mirage Swift LT
Humidifier: Resmed H4i
CPAP Pressure: 5.5 - 15
CPAP Software: Not using software

Other Comments: CPAP since 2009

Sex: Male
Location: Texas

Post: #12
RE: Upper pressure setting on a CPAP Autoset machine
(05-17-2015 05:57 AM)player Wrote:  Can higher pressures cause air to be pumped into the stomach?

If my minimum pressure is set above 6, I get air pushed into my stomach. Maximum pressure (now 15) does not seem to be a problem.

It was the air in stomach problem that prompted my change from a fixed pressure to autoset pressure. 7.5 of constant CPAP caused severe discomfort from stomach air.
05-19-2015 03:23 PM
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vsheline Offline

Advisory Members

Posts: 1,907
Joined: Jul 2012

Machine: S9 VPAP Adapt (USA Model# 36007, not better 36037 or 36067)
Mask Type: Full face mask
Mask Make & Model: F10 or SimPlus w/ 2Liners. MirageQuatro & Gecko gel pad
Humidifier: H5i
CPAP Pressure: 15 EPAP, PS 5-10
CPAP Software: ResScan

Other Comments: Marfan Syndrome, chronic bradycardia, occasional Cheyne-Stokes Respiration

Sex: Male
Location: California, USA

Post: #13
RE: Upper pressure setting on a CPAP Autoset machine
(05-19-2015 03:23 PM)Programmer Wrote:  If my minimum pressure is set above 6, I get air pushed into my stomach. Maximum pressure (now 15) does not seem to be a problem.

It was the air in stomach problem that prompted my change from a fixed pressure to autoset pressure. 7.5 of constant CPAP caused severe discomfort from stomach air.

Hi Programmer, welcome to Apnea Board.

Thanks for sharing your experience. Yours is an interesting case. Can't guess what the dynamics are. I think most people are more bothered by too high of a Max Pressure causing air swallowing, rather than too high of a Min Pressure.

As they say, everybody is different.

Take care,
--- Vaughn

Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.
(This post was last modified: 05-20-2015 02:40 AM by vsheline.)
05-20-2015 02:39 AM
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GeoffD Offline

Preferred Members-2

Posts: 194
Joined: Sep 2014

Machine: ResMed Airsense 10 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: ResMed AirFit P10
Humidifier: Integral + ClimateLine
CPAP Pressure: 14-17
CPAP Software: ResScan

Other Comments:

Sex: Male
Location: New England

Post: #14
RE: Upper pressure setting on a CPAP Autoset machine
(05-16-2015 06:04 PM)retired_guy Wrote:  The theory is it could always stay at 20. But in practice I have experienced occasions where the machine decided to crank the pressure way up when it was not necessary. I have holes in my socks to prove it.

I too like a nice, tight range. Enough to let the machine think it's in charge, but still with a short leash.

I never had the issue with my ResMed S9 AutoSet but the AirSense 10 I have now went nuts on me a few times with runaway pressure and other strange failure symptoms. I started rebooting it by unplugging/re-plugging the power connector and the problems went away. The power supply overheated in Korea a month ago. I have almost 30 days on the replacement power supply without rebooting the machine and it's been rock-solid. My DME wanted to swap out the A10 when I emailed them from Korea. I wanted to collect data on the machine with the new power supply and have a spare S9 if the A10 went out to lunch. So far, so good.

I started this last September with a constant 17 AHI and backed it off to 15-17 and then 14-17. I've always had great results and wanted a bit less aggressive pressure. My 30-day AHI is 0.3. I've lost interest in messing with the pressures. Even a bad night after too much alcohol comes in at AHI < 2.0.
05-20-2015 08:08 AM
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Farther Offline

Members

Posts: 9
Joined: Feb 2015

Machine: ResMed AirSense 10 Autoset & Z1 Auto
Mask Type: Nasal pillows
Mask Make & Model: ResMed AirFit P10
Humidifier: part of the AirSense 10 Autoset & none with the Z1 Auto
CPAP Pressure: 4-20
CPAP Software: ResScan Other Software

Other Comments:

Sex: Male
Location: CA/OR Frontier

Post: #15
RE: Upper pressure setting on a CPAP Autoset machine
The comment about the lower setting of 4 causing a feeling of smothering is interesting. That's what is happening to me on occasion. I have my APAP machine set for 4 and twenty and have not had a problem yet with the higher number. I will keep an eye out.
05-20-2015 10:32 PM
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krelvin Offline

Advisory Members

Posts: 155
Joined: Jul 2014

Machine: Resmed S9 VPAP Auto BiLevel
Mask Type: Full face mask
Mask Make & Model: Quattro Air
Humidifier: S9 Series H5i Heated Humidifier with Climate Control
CPAP Pressure: 10.6cm - 18cm - PS 4cm
CPAP Software: ResScan SleepyHead

Other Comments: FlashAir WiFi SDcard with SleepMaster/FlashPAP - Weather Nut

Sex: Male
Location: Mesa AZ

Post: #16
RE: Upper pressure setting on a CPAP Autoset machine
(05-20-2015 10:32 PM)Farther Wrote:  The comment about the lower setting of 4 causing a feeling of smothering is interesting. That's what is happening to me on occasion. I have my APAP machine set for 4 and twenty and have not had a problem yet with the higher number. I will keep an eye out.
4 to 20 is basically the default wide open settings. Many will have problems at the lower end as it is too low. You should look at your data and see what a higher lower number should be or ask how to figure it out.

Current Settings PS 4.0 over 10.6-18.0 (cmH2O) BiLevel Auto
TNET Sleep Resource Pages
CPAP Machine Database
05-21-2015 06:01 AM
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Coach_L Offline

Members

Posts: 11
Joined: Jan 2015

Machine: Airsense10 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Airfit P10
Humidifier: Integrated
CPAP Pressure: 10-13
CPAP Software: ResScan SleepyHead Other Software

Other Comments:

Sex: Male
Location: Canada

Post: #17
RE: Upper pressure setting on a CPAP Autoset machine
What I did is set my lower pressure to the pressure I use 95% of the time which was 10 and set my max at 13 as I never went above needing 12.6 over a two week period. This has worked well for me for the last several months. Mouth leak is my only issue these days.
05-24-2015 10:39 AM
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