Trying to get my head around the leak data from MyEncore. There are 3 plots...average leak, 90% leak and max leak. What exactly do these mean? I'm mostly interested in the max leak plot.
Thanks
Leak data MyEncore
8 posts
• Page 1 of 1
Leak data MyEncore
"To sleep, perchance to dream"
Biggy,
The average leak rate is what it says - the average leak-rate in liters/min over the whole night.
The 90% rate means that you spent 90% of the night below the given level (ie you exceeded this value for 10% of the time).
The maximum is the peak value recorded for the night.
BTW - are you my long-lost evil twin brother? Here's a picture that was my earlier avatar:
There seems to be a definite family likeness!
The average leak rate is what it says - the average leak-rate in liters/min over the whole night.
The 90% rate means that you spent 90% of the night below the given level (ie you exceeded this value for 10% of the time).
The maximum is the peak value recorded for the night.
BTW - are you my long-lost evil twin brother? Here's a picture that was my earlier avatar:
There seems to be a definite family likeness!
twins
Aren't you two twins celebrating your 100th anniversary this year?
Bern (in Switzerland) seemed to think so.
O.
Bern (in Switzerland) seemed to think so.
O.
_________________
| Mask: AirFit™ P10 Nasal Pillow CPAP Mask with Headgear |
| Additional Comments: Machine: Resmed AirSense10 for Her with Climateline heated hose ; alternating masks. |
Sure feels like it sometimes "Relatively" speaking, that is...
BTW - I'm working on a new theory relating how energetic you feel when using cpap. So far my formula is
E = mc
where E is how energetic you feel, m is your body mass, and c is your cpap usage. Somehow it doesn't quite fit the data - does anybody have a suggestion on how we might modify the formula? We could be famous...
BTW - I'm working on a new theory relating how energetic you feel when using cpap. So far my formula is
E = mc
where E is how energetic you feel, m is your body mass, and c is your cpap usage. Somehow it doesn't quite fit the data - does anybody have a suggestion on how we might modify the formula? We could be famous...
Let me see if I get this. My latest data showed the following:derek wrote:The average leak rate is what it says - the average leak-rate in liters/min over the whole night.
The 90% rate means that you spent 90% of the night below the given level (ie you exceeded this value for 10% of the time).
The maximum is the peak value recorded for the night.
average 30.0 lpm
ave max 83.4 lpm
90% 36.1 lpm
So, my average for the 17 days of data was 30.0 (seems high) I had some high leaks averaging about 83.4, and 90% of the time I was at or below 36.1????
Derek in encore pro daily reports it shows a greyed in area with a 90% figure under it, what does that mean???
Play Golf - Enjoy Life
Drink a Lttle Wine
Don't Worry about Tomorrow
Drink a Lttle Wine
Don't Worry about Tomorrow
I think we should add H squared (for heated hose, and heated humidity).....E = mc
where E is how energetic you feel, m is your body mass, and c is your cpap usage. Somehow it doesn't quite fit the data - does anybody have a suggestion on how we might modify the formula? We could be famous...
O.
_________________
| Mask: AirFit™ P10 Nasal Pillow CPAP Mask with Headgear |
| Additional Comments: Machine: Resmed AirSense10 for Her with Climateline heated hose ; alternating masks. |
I didn’t know there were twins on this forum, but the resemblance does look strong.
Leak Data:
I’ve been looking at all my leak data for the last month in an attempt to understand how it affects the results that Encore Pro provides and how it is displayed in MyEncore.
During the periods where the Max leaks show Black Block bars on the Leak section of Encore Pro’s display, Encore Pro isn’t collecting or recording any event data during those periods (no snores, hypopneas or apnea events). In addition, if the machine is an APAP, the machine’s pressure drops to its lowest output during each max leak occurrence.
Without any events being recorded, and because the pressure produced by the machine is probably inadequate for xPAP, the time spent in a max leak is time spent without titration and should be reduced from the XPAP compliance time value for that night.
In some simple chart reading, which may be inaccurate, I found that if I remove the time spent in a max leak condition and then use the remaining time in calculating the results, my results haven’t matched the software’s results. From this observation I’m thinking if the time spent in max leak is much more than 5 to 10 percent, the reports numbers shouldn’t be considered as being meaningful for that night.
As for the average leak rate, this is dependant upon mask design and upon mask fitting. In some simple test of my Comfort Curve mask, it appears the mask has a built-in leak rate of about 28-to-30 LPM. My Mirage Activa appears to have a similarly designed leak rate, but the fit of the Activa seems more capable and has produced a lower overall average leak rate for me. For example, the Mirage Activa shows an overall average leak rate of 38.2 LPM, and the Comfort Curve shows and average leak rate of 46.2 LPM. If we consider that the designed leak rate is about the same, then the fit of the Comfort Curve has twice the leak rate based upon how it fits me. This isn’t to be taken as a problem with the Comfort Curve; instead it should be looked at from how it is working for me and where I might need to consider changes.
I also suspect leaks have an affect on how the machine determines which kind of event is happening if the leak rate is large. Noise does affect the snore count, so if the white noise is loud during a large leak, I’ve seen indications that the machine thinks it is a Hypopnea event. During large leaks, my REMStar tries to compensate with more volume by increasing fan speed, but if the leak is large enough it might be that during a large leak the signal that the machine uses to understand what is happening might be confused into thinking it is an obstructive event when in fact it is noise from a large leak problem. All this is telling me we should do our best to keep our average leak rate down and to do whatever we can to avoid large and max leaks. A rule of thumb I’m using here is to not let the mask fit leak exceed the mask designed leak rate by more than 50%, but that might be too generous so maybe even a smaller value would be more realistic.
Leak Data:
I’ve been looking at all my leak data for the last month in an attempt to understand how it affects the results that Encore Pro provides and how it is displayed in MyEncore.
During the periods where the Max leaks show Black Block bars on the Leak section of Encore Pro’s display, Encore Pro isn’t collecting or recording any event data during those periods (no snores, hypopneas or apnea events). In addition, if the machine is an APAP, the machine’s pressure drops to its lowest output during each max leak occurrence.
Without any events being recorded, and because the pressure produced by the machine is probably inadequate for xPAP, the time spent in a max leak is time spent without titration and should be reduced from the XPAP compliance time value for that night.
In some simple chart reading, which may be inaccurate, I found that if I remove the time spent in a max leak condition and then use the remaining time in calculating the results, my results haven’t matched the software’s results. From this observation I’m thinking if the time spent in max leak is much more than 5 to 10 percent, the reports numbers shouldn’t be considered as being meaningful for that night.
As for the average leak rate, this is dependant upon mask design and upon mask fitting. In some simple test of my Comfort Curve mask, it appears the mask has a built-in leak rate of about 28-to-30 LPM. My Mirage Activa appears to have a similarly designed leak rate, but the fit of the Activa seems more capable and has produced a lower overall average leak rate for me. For example, the Mirage Activa shows an overall average leak rate of 38.2 LPM, and the Comfort Curve shows and average leak rate of 46.2 LPM. If we consider that the designed leak rate is about the same, then the fit of the Comfort Curve has twice the leak rate based upon how it fits me. This isn’t to be taken as a problem with the Comfort Curve; instead it should be looked at from how it is working for me and where I might need to consider changes.
I also suspect leaks have an affect on how the machine determines which kind of event is happening if the leak rate is large. Noise does affect the snore count, so if the white noise is loud during a large leak, I’ve seen indications that the machine thinks it is a Hypopnea event. During large leaks, my REMStar tries to compensate with more volume by increasing fan speed, but if the leak is large enough it might be that during a large leak the signal that the machine uses to understand what is happening might be confused into thinking it is an obstructive event when in fact it is noise from a large leak problem. All this is telling me we should do our best to keep our average leak rate down and to do whatever we can to avoid large and max leaks. A rule of thumb I’m using here is to not let the mask fit leak exceed the mask designed leak rate by more than 50%, but that might be too generous so maybe even a smaller value would be more realistic.
Roger...
8 posts
• Page 1 of 1