Post Reply 
Operating Altitude Question
Author Message
aehjr Offline

Preferred Members-2

Posts: 92
Joined: Dec 2012

Machine: ResMed S9 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Mirage FX
Humidifier: ResMed S9 H5i
CPAP Pressure: 6 - 12
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Colorado

Post: #1
Operating Altitude Question
While looking at the specs for different CPAP machines, I noted that some have an Operating Altitude of Seal Level to 8500'. I ski and routinely stay at resorts at 9000' or higher; what happens past 8500'? Is there anything that can be done to improve the performance at the higher altitudes?
12-10-2012 10:00 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
pssnn Offline
Wiki Editor
Preferred Members-2

Posts: 136
Joined: Mar 2012

Machine: ResMed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Swift FX
Humidifier: H5i
CPAP Pressure: 14 - 18
CPAP Software: ResScan SleepyHead

Other Comments: Quattro FX + Swift FX

Sex: Male
Location: Missouri

Post: #2
RE: Operating Altitude Question
(12-10-2012 10:00 PM)aehjr Wrote:  While looking at the specs for different CPAP machines, I noted that some have an Operating Altitude of Seal Level to 8500'. I ski and routinely stay at resorts at 9000' or higher; what happens past 8500'? Is there anything that can be done to improve the performance at the higher altitudes?

HI aehjr,

Below is a forum link where a similar situation was discussed. Maybe it will be helpful Smile

http://www.apneaboard.com/forums/Thread-...t=altitude

"Goodnight Chesty wherever you are!"
12-10-2012 11:00 PM
Find all posts by this user Post Reply Quote this message in a reply
zonk Offline

Advisory Members

Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #3
RE: Operating Altitude Question
I don,t think makes much difference at 9000 ft but maybe at 12000 or higher might need to bump up pressure a bit to compensate
start with your normal set pressure and if AHI shows any significant jump, you can increase pressure by small increment
use SleepyHead to see whats going
12-10-2012 11:17 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
aehjr Offline

Preferred Members-2

Posts: 92
Joined: Dec 2012

Machine: ResMed S9 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Mirage FX
Humidifier: ResMed S9 H5i
CPAP Pressure: 6 - 12
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Colorado

Post: #4
RE: Operating Altitude Question
(12-10-2012 11:00 PM)pssnn Wrote:  HI aehjr,

Below is a forum link where a similar situation was discussed. Maybe it will be helpful Smile

http://www.apneaboard.com/forums/Thread-...t=altitude

Thanks, pssnn.

And Semper fi.
12-11-2012 09:45 AM
Find all posts by this user Post Reply Quote this message in a reply
TheDuke Offline

Preferred Members

Posts: 44
Joined: Mar 2012

Machine: DeVilbiss Intellipap BiLevel DV-55D
Mask Type: Nasal mask
Mask Make & Model: ResMed Activa
Humidifier: DeVilbiss IntelliPap
CPAP Pressure: CPAP Mode 9.0 cm.
CPAP Software: Other Software

Other Comments:

Sex: Male
Location: Western Kentucky USA

Post: #5
RE: Operating Altitude Question
My machine also gives an 8500 ft. statement. But I have had occasions to use my machine for a total of 7 or 8 weeks at altitudes of as much as 10,500 ft. and everything seemed to be OK- I slept well, awoke rested, and the machine ran smoothly each of the times that I spent a week at high elevation. I don't believe that there is any cause for concern.

I was much more aware of the elevation during the daytime hours when I was out and about in the mountains and got short of breath when I walked uphill.

TheDuke
12-23-2012 09:46 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
Shastzi Offline

Advisory Members

Posts: 1,174
Joined: Dec 2012

Machine: ResMed S9 Autoset
Mask Type: Full face mask
Mask Make & Model: FitLife Total face mask
Humidifier: F&P HC150 with Hybernite heated hose.
CPAP Pressure: 15cm-20cm H2O (auto)
CPAP Software: SleepyHead Other Software

Other Comments: CMS50-F wearable Oximeter; Software: SPO2 Assistant

Sex: Undisclosed
Location: Florida, USA.

Post: #6
RE: Operating Altitude Question
That would be a good place for a pulse oximeter with SO2 Assistant software and data collected for Sleepyhead. You might be running into desaturation events though your BiPAP is running its heart out but not quite able to produce enough pressure at those altitudes. Some O2 to bleed into the system might be a good idea too.
Not medical oxygen though, aviation oxygen (it has a lower dewpoint and wont freeze in the regulator)
I am just guessing at this point though.
Are there any engineers in the house?
12-23-2012 10:02 PM
Find all posts by this user Post Reply Quote this message in a reply
JJJ Offline

Advisory Members

Posts: 751
Joined: Apr 2012

Machine: ResMed S9 Autoset
Mask Type: Nasal mask
Mask Make & Model: Most recent: Wisp, Pilairo, Mirage Vista
Humidifier: ResMed S9 Autoset
CPAP Pressure: 17-20
CPAP Software: SleepyHead

Other Comments:

Sex: Male
Location: USA 97217

Post: #7
RE: Operating Altitude Question
I wonder what the pressure is in airliner cabins when they zoom around at 20,000 meters.
12-23-2012 10:44 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
Sleepster Offline
Wiki Editor
Moderators

Posts: 4,995
Joined: Feb 2012

Machine: ResMed AirCurve10 VAuto
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: HumidAir and SlimLine Hose
CPAP Pressure: MaxI 13.6 | MinE 5.2 | PS 4.4
CPAP Software: ResScan SleepyHead

Other Comments: Diagnosed Nov 2011. Conquered aerophagia.

Sex: Male
Location: Houston, Texas

Post: #8
RE: Operating Altitude Question
(12-23-2012 10:44 PM)JJJ Wrote:  I wonder what the pressure is in airliner cabins when they zoom around at 20,000 meters.

From the World Health Organization:

Although aircraft cabins are pressurized, cabin air pressure at cruising altitude is lower than air pressure at sea level. At typical cruising altitudes in the range 11 000–12 200 m (36 000–40 000 feet), air pressure in the cabin is equivalent to the outside air pressure at 1800–2400 m (6000–8000 feet) above sea level.

This is just under the 8500 ft altitude recommendation from the manufacturer!

Sleepster
Apnea Board Moderator
www.ApneaBoard.com


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.
(This post was last modified: 12-23-2012 10:58 PM by Sleepster.)
12-23-2012 10:53 PM
Find all posts by this user Post Reply Quote this message in a reply
PaulaO2 Offline
Wiki Editor
Moderators

Posts: 8,067
Joined: Feb 2012

Machine: S9 Autoset
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: H5i
CPAP Pressure: 14-20
CPAP Software: SleepyHead

Other Comments: Ehlers-Danlos Syndrome, Hypermobility Type; chronic sarcasm

Sex: Undisclosed
Location: western NC, USA

Post: #9
RE: Operating Altitude Question
Maybe I am reading it wrong but it seems to contradict itself.

First: cabin air pressure at cruising altitude is lower than sea level
Second: at typical cruising altitudes, the pressure is equivalent to x ft above sea level

So which is it?

PaulaO2
Apnea Board Moderator
www.ApneaBoard.com


Breathe deeply and count to zen.

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.
12-23-2012 11:14 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
JJJ Offline

Advisory Members

Posts: 751
Joined: Apr 2012

Machine: ResMed S9 Autoset
Mask Type: Nasal mask
Mask Make & Model: Most recent: Wisp, Pilairo, Mirage Vista
Humidifier: ResMed S9 Autoset
CPAP Pressure: 17-20
CPAP Software: SleepyHead

Other Comments:

Sex: Male
Location: USA 97217

Post: #10
RE: Operating Altitude Question
(12-23-2012 11:14 PM)PaulaO2 Wrote:  Maybe I am reading it wrong but it seems to contradict itself.
First: cabin air pressure at cruising altitude is lower than sea level
Second: at typical cruising altitudes, the pressure is equivalent to x ft above sea level.
So which is it?

What Sleepster meant was that the higher you go above sea level, i.e., in a balloon without pressurization or in a car up a mountain, the lower the air pressure. So the air pressure in an airliner cabin at 40,000 feet is pressurized, but only to the equivalent of being at 8,000 feet without pressurization.
12-23-2012 11:28 PM
Find all posts by this user Post Reply Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  High Altitude experience with Dreamstation APAP. NorthernGuy 6 517 08-31-2016 08:52 PM
Last Post: NorthernGuy
  1) AHI by altitude? 2) Elevated AHI but decent SpO2 glaxelson 5 599 03-09-2016 12:06 PM
Last Post: PaytonA
  Altitude dzwiss 8 674 02-28-2016 05:03 PM
Last Post: dzwiss
  Anecdotal experience regarding CPAP and altitude wolson 5 737 02-27-2016 03:42 PM
Last Post: SideSleeper
  [CPAP] Altitude Lyndaloofa 5 772 09-28-2015 02:35 PM
Last Post: surferdude2
  Change in altitude - AHI went up Rastur 5 1,238 09-20-2015 04:46 PM
Last Post: vsheline
  New to CPAP/BiPAP - living at High Altitude forJO 5 1,593 08-15-2015 03:25 PM
Last Post: vsheline

Forum Jump:

Who's Online (Complete List)