I used a Devilbiss Autocube AutoPlus for a number years. The last time for a new machine I was pressure sold a Fisher Paykel Sleepstyle as a design with bluetooth on promotion. I wasnt too happy with it and so I bought myself a new DeVilbiss Autocube AutoPlus. Because it had a heated tube on the Fisher and Paykel I used it during the first winter.
What surprised me were the fantastic AHI readings I got on the F&P - between 1.7 and 2.5. In all the years of using both the earlier and more recently bought DeVilbiss my AHIs were always between 7 and 10.
I have now been testing both machines over the past weeks using the same min and max pressures and the same and the same nasal pillow mask. F&P gives a 1 -2.5 AHI and the Devilbiss 9 -10AHI. Often after using the F&P I don't wake up with full energy. Using the De Vilbiss I do wake up with full energy.
My first thought was F&P set their algorithms differently to give a positive sales pitch on its efficiency.
Could someone explain what is going on to explain this large difference?
Different machines Different AHIs
Re: Different machines Different AHIs
Unless you were using both machines at exactly the same time there is not a valid comparison.
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Machine: ResMed AirSense™ 10 AutoSet™ CPAP Machine with HumidAir™ Heated Humidifier |
Mask: Fisher & Paykel Vitera Full Face Mask with Headgear (S, M, or L Cushion) |
Additional Comments: Back up is S9 Autoset...... |
Re: Different machines Different AHIs
No. I used each machine separately on different nights within same week.
Re: Different machines Different AHIs
You seem to be comparing trends - which I do consider a basically valid comparison.
You'd have to find out the descriptions of both algorithm to find out how they differ.
I don't think the makers intend to "miscount" the events in order to raise sale. Note that you yourself report sleeping better / feeling better with the machine that reports higher AHI for you.
Some of us benefit more from some algorithms than from others.
You'd have to find out the descriptions of both algorithm to find out how they differ.
I don't think the makers intend to "miscount" the events in order to raise sale. Note that you yourself report sleeping better / feeling better with the machine that reports higher AHI for you.
Some of us benefit more from some algorithms than from others.
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Mask: AirFit™ P10 Nasal Pillow CPAP Mask with Headgear |
Additional Comments: Machine: Resmed AirSense10 for Her with Climateline heated hose ; alternating masks. |
And now here is my secret, a very simple secret; it is only with the heart that one can see rightly, what is essential is invisible to the eye.
Antoine de Saint-Exupery
Good advice is compromised by missing data
Forum member Dog Slobber Nov. 2023
Antoine de Saint-Exupery
Good advice is compromised by missing data
Forum member Dog Slobber Nov. 2023
Re: Different machines Different AHIs
Not surprised about you're seeing different AHI numbers, after all they are different machines. Sorry I cannot offer an analysis just my own experience.
I've used a Philips DS1 and a ResMed AS10 this past year and found the Philips to consistently show 50-100% higher AHI, with machine settings as comparable as possible (e.g. 2 for ResMed vs 3-4 for Philips). I've also seen the same difference when using my recently received DS2. Most important is that I generally feel the same after using either machine.
I've used a Philips DS1 and a ResMed AS10 this past year and found the Philips to consistently show 50-100% higher AHI, with machine settings as comparable as possible (e.g. 2 for ResMed vs 3-4 for Philips). I've also seen the same difference when using my recently received DS2. Most important is that I generally feel the same after using either machine.
- ChicagoGranny
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Re: Different machines Different AHIs
Goodness gracious! These are considered unacceptably high numbers. In hindsight, you should have joined here and found out what was going on ----> Could the settings have been changed to get lower AHIs? Or were the events primarily SWJ caused by other factors than sleep apnea? Etc.
If you want to optimize your therapy now, read some of the educational posts (The first three announcements at the top of the index page for sure.) and then ask again for help in this same thread.