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New/old CPAP user question about elevation change
#1
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.
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#2
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".
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#3
(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.
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#4
Hi hozholla,
WELCOME! to the forum.!
Better luck to you with your CPAP therapy this time around.
Much success to you.
trish6hundred
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#5
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.


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