My pressure is all over my range of 12-16 but it has nothing to do with compensating for leaks, which have been running about 6 L/min. In my case I think it has to do with sinus issues, which have always been a problem for me. I use a neti pot to help control my sinus problems, but it is not 100% effective.
If the congestion is bad, I'll use a Mirage Quattro for part of the night, maybe about once a month. Then, my pressure sits at 12 (if I keep my machine in auto mode) and my leaks are sky high. Except, if the headgear is adjusted wrong, the leaks turn noisy, and then the pressure shoots up to 16. I think the machine interprets the noisy leaks as snores. I can't stand the Quattro, but sometimes it's a necessary evil.
There are other reasons for needing auto mode, such as positional apnea.
Machine increase pressure in respond to snoring and flow limitation which are precursor to full blown apnea event so if one have a problem with flow limitation, machine can increase pressure until maximum is reached or the person wake up
What i find as things calmed down and no further events detected, the pressure head towards the minimum and if the minimum set too low, it would take that much longer for the machine to do its job effectively
In my experience, the minimum pressure has to be right for the person, not too low otherwise would feel suffocating and not getting enough air to breathe and that in turn cause drop in oxygen levels and more apenic events as pressure too low to maintain open airways
As for Ramp, I use it but just 1 cm below the minimum pressure for 15 minutes, for me it feel just right, each one should make own choices and see whats feel comfortable and works best for them regardless what works for others ... everyone is different.
Thank you all for your help explaining the ramp and pressure range features. it was very helpful.
I don't understand the leaks. I look at the machine and see the green face and then lay down. How do I know any leak is happening? Will I wake up? Is this something that will be shown on any software that is used to download the information, and will it show as leaks or as some have said as an apnea?
Which S9 do you have? If you have an AutoSet, then you can download data to ResScan or Sleepy Head and look at a graph showing leak level through the entire night. If you have an Escape Auto you won't be able to see anything except usage data.