AHI performance comparison: Simplus vs. Resmed F30

I am reposting this image - error uploading.

Holding pressure and machine setting constant, this is my data using Simplus:

It posted. Now I've forgotten what your question was? Is the leak rate graph auto scaling and the green trace showing is the total leak from the mask including the vent loss? If so, you are getting essentially zero leaks, which is pretty impressive.

the enigma is that I am getting much better AHI using the F30 mask, even though I struggle with leaks using it. I'd like to get the same AHI results using the Simplus, since it is much more comfortable and doesn't wake me up.

here is my data using the Resmed F30, holding all settings on my machine constant between using Simplus and F30: (F30 in the 3 AHI range, Simplus in the 6 AHI range)

I will follow up with an image of the leak rate on F30

About the only thing I can think of is that the actual pressure in the mask which the machine has to estimate is potentially lower in the Simplus mask. You are mixing brands in your setup with a Phillips Respironics machine, the ResMed F30 mask, and a Fisher & Paykal Simplus mask. The machine will be trying to estimate machine to mask pressure loss based on their typical full face mask. The F30 and Simplus pressure losses may be a bit different. Your graphs suggest that the Simplus mask needs more pressure. That is making me think the actual pressure in the mask is lower than the F30 even though the machine is assuming it is the same. The easiest way to check is to run the Simplus at a higher pressure and see what happens. I have seen that before when switching between masks. On mask seems to need more indicated pressure than another to get the same results.

That makes sense. I thought maybe the respironics could deal with a diversity of masks and diffusers. Though clearly the F30 mask envelopes a much smaller volume, and the Simplus diffuser seems to pump out a lot more volume. Now, if only the Simplus doesn't blow off my face at a higher pressure - just when I got the fit just right ! Thank you for your insights.

I went back to the Simplus last night, bumped the pressure up 17 - 18cm. Made a fabric liner, taped my mouth. Had a comfortable night sleeping, but my AHI from last night was 4.18 Whereas with the F30 I can get down to 2.3 with 15 - 16 cm. So I'm going to try the F30 tonight, but use a fabric liner to see if I can manage all the small leak flapping under control.

lowest AHI on record for me- 2.10 (pressure set at 17 -18) paid a price - very swollen eye bags this morning. Maybe I need to try to find a better liner for the F30 ? Not sure they even have them. Still a lot of leaks. Tightening straps down to manage leaks is not comfortable. Tight straps plus mouth taped is pretty claustrophobic. I tore the tape off halfway through the night.

The P10 venting in my opinion is perfect. In almost any position you cannot feel or hear the venting. About the only way is to put your hand right up next to the vent, and even then it is very light. Have a look at this photo and you can see the vent. It is kind of a plastic mesh that is fairly large and there is a section of it on each side of the nasal piece on each side of the hose. This photo only shows one side. It is quite possible to buy a Swift FX replacement headgear, and the P10 mask frame and nasal piece, and put it together as I described in the my solution link above. You do have to modify the P10 frame as I described to do it though.