I voted straight cpap but I probably shouldn't have. I only have a cpap machine. I don't have the ability to set high and low pressures. Apologies for this. I didn't read the title of the post carefully.
I voted for 3 difference but its between 2 and 3
I could use constant pressure but seem to induce few centrals, I feel better with a narrow range
S9 AutoSet does not treat central apnea as such but by increasing pressure in response to snoring and flow limitation which are pre-cursors to obstructive apnea (not central apnea) the pressure does not run away willy-nilly to induce central apnea
In my experience its futile to set the minimum pressure so low and expect the machine to do its magic, the magic does not happen in this way. the minimum pressure ought to be close to your therapeutic pressure and maximum pressure just couple cmH2O above. The maximum pressure might not matter much but if you,re like me sensitive to wide pressure fluctuation than narrower is better and leak rate is better too
I started off with a difference of 4 (11-15 inhale pressure on the bipap) but found it to be over aggressive and eventually ended up at 11 constant. I could probably get even lower average pressure with auto, but I can't be bothered so far as I'm finally getting along with the machine. I do agree that narrower is probably better in general.
I'm still in my home titration phase; 8-20 right now. I have an appt with my sleep Dr at the end of January and I hope he bumps up the starting pressure; judging by data from sleepyhead. If he doesn't; I'm sure someone else will.