When 95/90% leak numbers don't tell all the story

[Pugsy]

So last night I got lazy and didn't prep my face like I should have and about halfway through the night the adhesive on the Eclipse started coming loose. Little or big...those leaks did wake me up OFTEN.

I knew the leak graph would be ugly but I didn't expect it to be this ugly.
Now I have the red line set for 30 L/min because that's where I might start raising an eyebrow.
Still as ugly as it is...not quite 25% of the night and I still had Mr Smiley showing for leak management this morning.
Remember Mr Frowny doesn't show up until we hit 30% or more of the night above 24 L/min.

I won't be so lazy tonight with the skin prep.

[gingerkitty]

Thank you for making this post - I'm glad it got bumped up. One thing I'd also add is that people adapt. I've had family members who were mouth breathers that adapted to nasal pillows over time. If I had used the data from just the first night, it would have looked bad, but as the weeks and months went by, it got down to maybe just a 1/2 hour that was without a pressure seal. These small portions were due to mouth breathing, and considering the discomfort/hassle from a full face mask, and the sleep specialist they talk to agreed, it was better to get 100% nights of compliance with a 1/2 hour of less effective treatment than try for masks that are uncomfortable and will get a lower compliance rate.

I second what you put in the OP to give a closer look at the data and not just jump on a band wagon of going to a full face mask.

[Pugsy]

it was better to get 100% nights of compliance with a 1/2 hour of less effective treatment than try for masks that are uncomfortable and will get a lower compliance rate.

I second what you put in the OP to give a closer look at the data and not just jump on a band wagon of going to a full face mask.

I gotta get the sleep first and I learned a long time ago that without sleep it didn't matter one bit what my reports looked like or what my numbers were.

I won't use a full face mask...just not going to happen so I don't even own one.
I have tried 2 or 3 over the past years and I just can't sleep with them for various reasons. No sense in wasting my money.

If I am sleeping decent (for me anyway) and feeling decent....I rarely even look at the software reports.
Only reason I looked at last night's data was because I knew the adhesive failed and I wanted to see just how badly it failed.

[ElusiveSleep]

Having the visible red line really helps put the leak rate in perspective (it just appeared in v.1.5.0 - not sure if it was an option in previous OSCAR versions). The gray vertical bars for large leak periods make things worse than they appear since you can be only 1 unit above default leak rate red line, and they will display. Thus large leaks are not the demons that used to haunt me in the past.

[Pugsy]

Having the visible red line really helps put the leak rate in perspective (it just appeared in v.1.5.0 - not sure if it was an option in previous OSCAR versions).

The red line was available in prior OSCAR versions but it had to be manually turned on to show up.
With version 1.5 the red line showing up is ON by default install and we no longer have to manually turn it on.
By default the red line is for 24 L/min (ResMed data point but the default happens with all brands) and it's not always what should be used especially when using a different brand.

Example...Respironics machine have a different "red line" and the Resmed data point really gets screwed up sometimes when Respironics users try to use OSCAR. Due to the way Respironics machines report the leak rate it (OSCAR) can make it look like leaks are HORRIBLE when they aren't. Scares the hell out of some people for no reason.

At this point in time it's not possible to have OSCAR know what default number it should be using based on brand.
So don't you all go asking.

[Pugsy]

Changing the red line placement visually doesn't affect % of time above the 24 L/min threshold.
The % of time above the red line comes from the machine itself and not from an OSCAR calculation.

I changed the red line placement to 50 L/min yet the time in large leak (per ResMed 24 L/min line in the sand) remains 24.86 percent....just like it was with placement at 24 or 30 L/min.

See example below ...same ugly leak night as above. Red line at 50 L/min...percentage didn't change.

[Tec5]

Changing the red line placement visually doesn't affect % of time above the 24 L/min threshold.

Here's what I'm seeing (for example):
With the preferences (for leak flag) set for 24 l/min the "Large Leak on the daily page" is 9.66 % and the "% time over leak rate threshold on the statics page" is 9.66%
However, if you change the preferences to 40 l/min the "Large Leak on the daily page" remains at 9.66 % BUT the "% time over leak rate threshold on the statics page" is now 5.4%

In fact All of the former averages "% time over leak rate threshold on the statics page" change.

[Pugsy]

Changing the red line placement visually doesn't affect % of time above the 24 L/min threshold.

Here's what I'm seeing (for example):
With the preferences (for leak flag) set for 24 l/min the "Large Leak on the daily page" is 9.66 % and the "% time over leak rate threshold on the statics page" is 9.66%
However, if you change the preferences to 40 l/min the "Large Leak on the daily page" remains at 9.66 % BUT the "% time over leak rate threshold on the statics page" is now 5.4%

In fact All of the former averages "% time over leak rate threshold on the statics page" change.

Don't know what to tell you but mine doesn't change. You can see for yourself.

[Tec5]

Don't know what to tell you but mine doesn't change. You can see for yourself.

Did you look at the Stats page, that’s where I’m seeing a change?
I tried this with a couple of different profiles using Oscar 1.5.1 with the same result, the value on the Daily page does not change when the Oscar preferences are changed from 24, but the values on the Statistics page do.

[Pugsy]

Don't know what to tell you but mine doesn't change. You can see for yourself.

Did you look at the Stats page, that’s where I’m seeing a change?
I tried this with a couple of different profiles using Oscar 1.5.1 with the same result, the value on the Daily page does not change when the Oscar preferences are changed from 24, but the values on the Statistics page do.

No. I only looked at the detailed report. For me...that's the important thing. I don't have time for this BS.
The statistics page is based on OSCAR calculations ...I think....the detailed report is based on what the machine calculates and reports.
I am sick of playing 20 questions with you. You are never satisfied. I will NOT be responding to you anymore.
Figure it out or don't...I don't care.
Good night and good bye.
Have a nice day.

[Tec5]

The Statistics page is very useful to see what your average values over time are. So if you want to know how your leaks or events have increased, decreased, or stayed the same over time, the Stats page is where to go.
If you want to fiddle with the leak threshold, that is the page that displays those modified values.

My sleep doctor always asks for the Stats page, is less interested in what I did one one particular night.

BTW, I’m not asking 20 questions, just helping you to see where the values change when you modify the leak flag value - and maybe someone else would like to know.

[dataq1]

The data rate for leaks is once every two seconds. (see the EDF data files)
While OSCAR software calculates an Average leak rate, apparently Resmed does not. (See the Statistics tab for average leak per session, however an "average" value for data that is markedly skewed is probably not useful)