Leaks worse, AHI better???

[JimZZZ]

Having just switched from a Simplus to an AirFit F10, Sleepyhead says my leaks are much higher but my events, AHI, etc. are quite a bit lower. Could it be that the F10 has a higher intentional leak rate? How do you discover the intentional leak rate for a given mask?

Although higher, my leaks remain well below the 24 level.

BTW, I find the F10 more comfortable than the Simplus because there is no forehead bar and the cushion material seems more thin and flexible on the face.

[zonk]

Could it be that the F10 has a higher intentional leak rate? How do you discover the intentional leak rate for a given mask?

Slightly higher but not significant enough. I don,t think matter as the S9 does its calculation assuming you,re using ResMed mask

F&P masks Exhaust-flow information
https://www.fphcare.co.nz/files/document...low-sheet/

F10 (page 7) http://www.resmed.com/us/dam/documents/p...er_eng.pdf

[JimZZZ]

Thanks zonk. You are the greatest at researching questions.

So at my average pressure, the exhaust flow is only 2 l/min higher for the F10 than the Simplus (39 vs. 37) so, as you say, that shouldn't make an appreciable difference. Your second note (S9 calculation assumes a ResMed mask) must be the explanation. At any rate, the therapy is going fine and my question was more from curiosity than anything else. Thanks again!