ResMed MyAir shows low on adjust mask but good apnea numbers

[mmona]

I don't know if i should worry about my "adjust mask" number, which ranges from 0-14, when my apneas are consistently under 2. Thoughts? I use TapPap, Resmed N20 and an adjustable Ruby Chinstrap. pressure 17-11 BiLevel.

Thoughts?

[TASmart]

Are you talking about the new Myair way of getting the mask fit number? Its the 95% number they use so the number reported (not the score) is the number that 95% of your time is below that leak amount. If you are referring to your score, then yes that is too low, and the machine is not able to accurately determine your apnea/hypopneas, especially if you are mouth breathing with a nasal pillow or nasal mask.

[mmona]

I'm not sure if it's new. I just got this resmed machine a few months ago. But here's last night's data:

Overall score is 86/100
Usage hours 70/70
Adjust mask seal is 6/20
Events per hour 0.5
Total MyAirscore 86/100

Most other nights over the past 30 days look similar. only the adjust mask seal is anywhere from 0-14, events per hour range from 0.5-1.5 and of course the total MyAirScore ranges from 60-94.

are the events per hour and total myAirScore completely fictitious?

[mmona]

Last night i received a 2 out of 20 on adjust mask seal and had 1 event per hour. total score82

night before 10/20 mask seal with .6 events per hour for a total of 90

night before that mask seal 17/20, .5 events per hour total score of 97

Is this all good, or should i be doing something differently?

[Pugsy]

It depends on how bad the large leaks and mask fit is because if it's really, really bad then the machine can be totally clueless as to what is going on and it might be totally missing a large number of apnea events and that nice low AHI isn't because nothing happened but because the machine was clueless.

You need to use available software and see just how bad the large leaks are (that's what is driving the leak fit numbers down on your MyAir report).
If you barely crossed the line into large leak territory it isn't nearly as big of a deal in terms of accuracy of that AHI as it might be if you went deep into large leak territory for prolonged periods of time.

[mmona]

Thanks. I'll have to figure out how to use some software and then check it out. I've been on bipap for five years, but just got a new machine. My old machine didn't give me as much feedback as this one. I mean I feel way better than before I started bipap, so i figured i was doing really well. But maybe i could be doing better.

Thanks!
K.

[Pugsy]

I mean I feel way better than before I started bipap, so i figured i was doing really well. But maybe i could be doing better.

Feeling better is the main thing.

I don't know that your machine is missing flagging events because I don't know just how deep into large leak territory you are going.

I do know that ResMed will flag a large leak at anything over 24 L/min but that doesn't mean the machine stops being effective at 25 or 26 L/min.
How effective it gets depends on just how big the large leaks are and how long you are there deep into large leak territory.
If your leaks never go past 30 L/min....those nice low AHI numbers are accurate.

Below is an example of mine where I had a lot of large leaks but the time spent over 40 L/min was minimal. The AHI is nice and low...and you can see the large leaks but they weren't massively deep into large leak territory. The AHI is probably accurate in this report. The time spent above 35 L/min was minimal and if I had experienced many apnea events they would likely have been flagged as maybe an unknown if using apap/cpap machine. This particular model machine only offers UAs so that doesn't mean much with this machine.

So you might be just fine in terms of accuracy even with some large leak.

My rules for leak that are a bit large...as long as they don't wake me up and I don't spend a really prolonged amount of time deep into large leak territory then I don't care.
This ugly night above...that was with a new mask and I didn't have the tension adjusted just yet. It moved around a lot.

[mmona]

Thanks. I'm not sure how to see your examples though.

[Pugsy]

Crap...forgot to post the image. Sorry...brain and fingers not working well together this morning.

[SFJ]

I am new to using a CPAP (7 days - or more accurately, 7 nights). I found this forum, and it has already been helpful. It helped me figure out why my nasal pillow was fluttering. Turns out I inverted part of the nasal pillow by using too much water pressure when cleaning it.

In any event, I had the same question about leakage and AHIs. My leakage to date has generally been below 24, with one spike at 60. My AHI has been between 2.4 and 5.5, averaging around 4. I assume this is decent, since my scores have been around 90.

I've seen references to graphs giving more detail than myAir, and I've seen references to software that can provide additional, more detailed information. So my question is, what is available and how do I get it?

Thanks in advance.

[Pugsy]

I've seen references to graphs giving more detail than myAir, and I've seen references to software that can provide additional, more detailed information. So my question is, what is available and how do I get it?

See here
https://sleep.tnet.com/equipment

and for some examples of part of what you can see
viewtopic/t103468/Need-help-with-screen-shots.html

and for installing and using SleepyHead
http://www.apneaboard.com/wiki/index.ph ... d#pid73182

[SFJ]

Thanks. I'll take a look and see if I can get these set up.