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90 day update
Good job on the graph.  The timeline begins in a hypopnea, that then has some normal looking breaths and trails off into what appears to be CA where we can see the FOT oscillation. What we can see from this snap shot is that your respiration is normal with longer expiration than inspiration. The inhales are everythin from where the line rises above zero, until it drops back to zero. Exhale is from the moment it drops below zero, and includes the zero flow along the horizontal zero flow line until a distinct inhale occurs again.  We can see some irregularities in the flow line, and this is throwing off the machine.

Notice at 03:37:55 how the mask pressure becomes jagged?  In fact, for every breath here, the mask pressure does not really settle in at EPAP bit wavers.   What ever is going on with that ragged exhale, it really confuses the machine.   With all the CA evens I see, and the rather poor tracking of the machine for IPAP/EPAP, I would just turn off EPR, but if you find it comfortable it's not hurting anything.  The point is, you don't really have an unusual I:E ratio, the machine just takes the first increase after exhale and labels that as start of inspiration.

[Image: ukyqCTR.png]
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Since we got into this discussion, let me add, there is nothing you can do about it. The machine gets confused because you have such a long zero-flow at the end of expiration. That may not be typical for you since it looks like hypopnea.  Here is my chart and as you can see, it is much easier for the machine to 'know' when inhale begins and ends.

[Image: XU12agGh.png]
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Ok. Thx sleeprider for all your help! I guess I'll just ditch the epr then as it can't help.
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I can't say if it helps or not, but it is not able to work as designed with the irregular breathing pattern in that brief screenshot. It might be different at other times of the night. I think it's fine to experiment with different EPR settings including off, but if you try something, stick with it a couple days so you can establish a baseline
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