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New/old CPAP user question about elevation change
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hozholla Offline

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Machine: Apex XT Fit Sense
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Mask Make & Model: Wizard 210
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Post: #1
New/old CPAP user question about elevation change
I have recently started using CPAP after 10+ years of non compliance and have a question concerning elevation changes.

I have a brand new APEX XT Fit Sense machine which is supposed to "sense" elevation changes and make adjustment automatically, to 8000' above sea level.

What does the machine actually do to adjust to higher elevation?

I am going to Cusco Peru in May and plan on spending several nights at 11,000'. What can I do to the machine (if anything) when I sleep above 8000'?

Thanks in advance for any recommendations.
(This post was last modified: 03-17-2016 07:51 AM by hozholla.)
03-17-2016 07:49 AM
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JudgeMental Offline

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Posts: 324
Joined: Feb 2012

Machine: Respironics DreamStation Auto-CPAP
Mask Type: Full face mask
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CPAP Pressure: 11-14
CPAP Software: SleepyHead

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Sex: Male
Location: Florida USA

Post: #2
RE: New/old CPAP user question about elevation change
Do nothing but sleep well and enjoy Peru. VERY Beautiful country.

Yesterday is history; Tomorrow is a mystery; Today is a gift; Thats why its called "The Present".
03-17-2016 08:39 AM
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palerider Offline

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Posts: 440
Joined: Nov 2014

Machine: s9 vpap auto
Mask Type: Nasal pillows
Mask Make & Model: p10
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CPAP Pressure: 18/13+
CPAP Software: SleepyHead

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Sex: Male
Location: Dallas(ish)

Post: #3
RE: New/old CPAP user question about elevation change
(03-17-2016 07:49 AM)hozholla Wrote:  What does the machine actually do to adjust to higher elevation?

nothing. modern machines use pressure transducers at the airflow outlet to measure the relative output pressure of the machine and speed up or slow down the fan.

the only side effect is that the thinner the air, the faster the fan has to spin to generate the desired pressure, and at some point, you'll run out of spin.
03-17-2016 01:56 PM
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trish6hundred Offline

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Posts: 6,452
Joined: May 2012

Machine: Resmed S9 AutoSet for Her
Mask Type: Full face mask
Mask Make & Model: Fisher & Paykel Simplus
Humidifier: H5i Heated Humidifier
CPAP Pressure: 10 - 7-20 Cm H2O
CPAP Software: Not using software

Other Comments: I started CPAP in 2008. Totally blind since birth.

Sex: Female
Location: Missouri, USA

Post: #4
RE: New/old CPAP user question about elevation change
Hi hozholla,
WELCOME! to the forum.!
Better luck to you with your CPAP therapy this time around.
Much success to you.

trish6hundred
03-17-2016 05:59 PM
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PaulaO2 Offline
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Posts: 8,068
Joined: Feb 2012

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

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

Sex: Undisclosed
Location: western NC, USA

Post: #5
RE: New/old CPAP user question about elevation change
You'll be fine for just a few nights. You *may* have a few more central events than usual, or have them for the first time, but it will settle once you come back down.

At higher altitudes, the CPAP has to "work harder" to generate the set pressure. Your CPAP will automatically do this up to, as you said, 8000ft. Over that, it will be generating slightly lower than the set pressure. If you were going to be at that height for more than just a few days, you would want to perhaps adjust the pressure upward. But for that time period you will be there, it isn't worth it. And if you have an existing heart condition, don't do it without discussing it with your doctor first.


http://journal.publications.chestnet.org...id=1069275

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.
03-18-2016 07:12 PM
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