Well I see you are as feisty as you were 5 years ago, Well did some digging on the subject and you are as vague as Respironics are.palerider wrote: ↑Sun Aug 16, 2020 3:07 pmI suggest you do some reading on the forum, it's been explained hundreds of times.
Don't offer comments on things you don't know the answer to, it wastes everyone's time, yours in posting drek, someone else's time correcting you, and most of all, it wastes the time of the OP who's sent off on stupid wild goose chases.
Here, I'll start you out:
https://www.google.com/search?channel=f ... espironics
Philips-Respironics System One: There is no official "line in the sand" for flagging a Large Leak.
(Source: Encore Report Guide) Lots of System One user data posted on the forum indicates the Large Leak line for Total Leak Rate depends on whether the machine is a Series 50 (older) System One or a Series 60 (newer) System One. Lots of user data posted on the forum also indicates that the Large Leak line depends on the pressure used: People using less than 10 cm of pressure see Large Leaks being flagged much earlier than people using pressures greater than 10 cm. Here are some general estimated guidelines for where the undefined Philips Respironics Large Leak line is located:
Series 60 System One users may start to see Large Leaks being flagged when the Total Leak Rate reaches 60-70 L/min; if the prescribed pressure setting is below about 8cm, then Large Leaks may be flagged when the Total Leak Rate reaches 50-60 L/min in some circumstances.
Series 50 System One users may start to see Large Leaks being flagged when the Total Leak Rate reaches 80-90 L/min; if the prescribed pressure setting is below about 8cm, then Large Leaks may be flagged when the Total Leak Rate reaches 60 L/min in some circumstances.
Official Large Leaks for Philips Respironics System One machines are very difficult to determine with great accuracy in versions of SleepyHead prior to 0.9.6. In version 0.9.6, the Encore-defined Large Leaks are flagged by gray bars in the Events table and as a gray background in the Flow Rate curve. The Official Large Leaks for a System One will NOT be flagged directly on the SleepyHead Leak/Total Leak graph.
If you want to add a Redline to your Leak/Total Leak graphs in OSCAR, our advice is to look at your own Large Leak flags and figure out where they seem to start. If you don't seem to have very many Official Large Leak, then use the above guidelines as a decent enough starting guess for where your particular Redline should be drawn.
In order to adversely affect the efficacy of your CPAP therapy and the accuracy of the data recorded by your machine, leaks have to be both large enough and long enough. As we've just seen, "Large enough" is easily quantified by the manufacturers. But what is "long enough"?
ResMed is apparently the only major manufacturer that has a user-friendly tool for determining whether the official Large Leaks last long enough to compromise the CPAP therapy: The dreaded Mr. Red Frowny Face shows up on the short version of the Sleep Quality Report when Official (ResMed) Large Leaks make up at least 30% of the night.
Since the other manufacturers are "vague" when it comes to describing how long Large Leaks must last to adversely affect the CPAP therapy, we'll take that ResMed definition as a "working" definition: