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Unread post  Post subject: new user - New CPAP user - question to this AHI value?  |  Posted: Wed Jun 23, 2021 6:52 am

Joined: Wed Jun 23, 2021 6:12 am
Posts: 1
Location: Frankfurt, Germany
PAP Mask: ResMed AirFit N20
PAP Machine: ResMed AirSense 10 AutoSet
Pressure Setting: 5 - 10

G'day everybody, new here, brought over from Justins YouTube channel (Great btw)

I have been in treatment about 6 months, trying to read and catch up on this whole thing with Apnea (New to me)

There is one thing I simply cannot get to compute for me: It's this AHI value!, in short;
In Wikipedia there is a definition, this value is calculated and given in whole numbers, and its grouped so that e.g. a value over 30=Severe apnea.

Been using the Resmed machine that connects to "myair" web, works great actually, but the value provided for "events per hour" does not correlate AT ALL to this AHI value? I assume this value is not actually related to the AHI?
If its not, then what is it, and how could it be used for anything? E.g. Today this value is 0.46, most days its like that, but... what does that tell me?
When I look at the data in "resScan", same thing as "Myair", the AHI value is always with 2 decimals, and always below 1.00?
Today I installed this OSCAR software, it gives a lot more data than the ResScan, but again the same understanding "problem" for me, none-correlatable value for events or AHI(Or what I suppose is events per hour or night or sleep session)

Why are none of these applications simply calculating and providing the AHI, i.e. the events divided by hours of sleep, and provide that figure? (Or is this calculation for AHI useless?)

Could somebody enlighten me a bit please?


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Unread post  Post subject: Re: new user - New CPAP user - question to this AHI value?  |  Posted: Wed Jun 23, 2021 1:20 pm

Joined: Tue Sep 05, 2017 9:40 am
Posts: 684
Location: WI
PAP Mask: F & P Simplus
PAP Machine: Airsense 10 Autoset
Pressure Setting: 12-20

AHI = Number of events per hours wearing the mask....You slept 8.9 hours and had about 4 events. 8.9 . 4/8,9 = .46

Unread post  Post subject: Re: new user - New CPAP user - question to this AHI value?  |  Posted: Thu Jun 24, 2021 3:44 am
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Joined: Mon Apr 27, 2020 1:06 am
Posts: 251
Location: Australia
PAP Mask: Resmed Airtouch F20
PAP Machine: Resmed AirCurve 10 CS Pacewave ASV
Pressure Setting: Min EPAP: 8.0 Max EPAP: 11.0 PS Min: 3.0 PS Max: 8.0

G'day Boomie

Yes, AHI is the total number of events (apneas + hypopneas) divided by the time the machine was on. If you're always seeing an AHI under 1, then you're doing very well.

Don't be confused by the untreated results that are used to define how "severe" your apnea is (eg severe apnea = AHI > 30). Once you put that mask on, your AHI should drop right down below 5. Consistently below 1.00 is a very good result.

Regards from Australia

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