BG50 wrote: ↑Tue Dec 14, 2021 5:39 am
Events per hour: 5.3
MASK seal:

Humidifier:

Pressure: 13 (my range is between 4 and 20)
Leak: 37L/min
AHI: 5.3
Total AI: 3.6
Central AI: 2.0
BG50 wrote: ↑Tue Dec 14, 2021 5:39 am
Can someone help me with the numbers.....is the AHI high for a machine and what about the leakage?
BG50 wrote: ↑Tue Dec 14, 2021 5:39 am
Makes me very optimistic I can do this.
I will explain those numbers seen on the machine in a bit.
First of all...lets get you prepared to see even more details that the machine can provide.
Get this software
OSCAR
https://www.sleepfiles.com/OSCAR/
http://www.apneaboard.com/wiki/index.ph ... stallation
http://www.apneaboard.com/wiki/index.ph ... rpretation
and for optimal advice post the detailed report that shows more useful stuff
see this thread for formatting of the graphs. The machine gives you a lot more data than we need to see and OSCAR shows that data. It's a bit overwhelming. Let's start with the basics.
viewtopic/t158560/How-to-post-images-for-review.html
Pressure: 13 (my range is between 4 and 20)
Leak: 37L/min
The machine reports leaks and pressure in what we call 95% numbers and all that means is you were at OR BELOW that number of 95% of the night. It is NOT where you spent 95% of the night and it is NOT an overall average.
I have a good thread that explains why the 95% numbers don't always tell the whole story here. I had a 48 L/min 95% number but while the leak numbers themselves looked bad...the actual time in large leak wasn't really all that much compared to the rest of the night.
https://www.cpaptalk.com/viewtopic.php? ... t#p1036669
For your point of reference 24 L/min is ResMed's line in the sand where they start large leak territory flagging.
When you go into large leak territory they tell you that the machine's ability to sense, record and respond can be negatively impacted but up to 24 L/min they tell you they can easily compensate for leaks.
In real life the machine does a decent job up to around 35 L/min and then things start getting iffy...the deeper you go into large leak territory the iffier it gets.
Your machine reports only excess leaks. There are other brands that report different leaks including the mask's vent rate but ResMed machines remove the vent rate leak from what they report.
When it comes to leak evaluations I look at how deep did I go into large leak territory...how long was I there...and did the leaks wake me up or not. Large leak territory....your therapy isn't in the toilet at 30 L/min.....the machine will still do a fairly decent job. Now if you are deep into large leak territory with 50 or 60 L/min and stay there for 2 or 3 hours...we got a problem.
Actually for a first night.....I think you did quite well.
As for the AHI numbers
AHI: 5.3
Total AI: 3.6
Central AI: 2.0
Since I know what these mean I can see what the OSCAR report will show.
Central apnea (CA/clear airway on Oscar)...is 2.0 or 2 per hour average. Not going to worry about that number for a couple of reasons...one being there very likely is going to be some awake breathing false positives in there and two being we really can't do much about centrals...and three is the fact that there aren't enough of them to worry about anyway.
A few centrals are NORMAL to have and no cause for alarm.
Total AI...3.6 and since we know that AI is a total of central apneas and obstructive apneas that means 1.6 per hour of the AI (apnea index and index is hourly average) were obstructive apneas. 1.6 isn't a bad number at all especially for the first night but maybe a little higher than we would want to see every night. More on that later.
AHI is the apnea hyponea index and you don't see hyponea index on the LCD screen but it will be available on the OSCAR detailed report. It's going to be around 1.7 hyponea index because if we take the overall AHI of 5.6 and subtract the AI index the remaining is going to be hyponea index...or 5.3 minus the 3.6 AI index...leaves 1.7.
Once you post the detailed report I can explain further but really need to see that detailed report first.
I suspect that you need an upward adjustment in that minimum pressure but we need to first see the detailed report AND importantly you need to tell us if there is a period of time that you know you were awake. It's very likely there are some awake breathing false positive flagging that is going to muddy up the evaluations a bit.
Please don't assume that because your 95% pressure number is 13 that you need a minimum close to 13 because it simply doesn't work that way at all.
You did great for a first night. Better than I did on my first night...and you can for sure do this.
We like to see the AHI well below 5 in terms of the obstructive stuff (OAs and hyponeas) but we don't expect it the very first night or even the first week.
I may have to RISE but I refuse to SHINE.