I have been on APAP now 4 months - about a month ago I increased my minimum pressures with a lot of improvement in how I feel.
I was expecting 95% and max pressures to stay roughly the same (though obviously average pressure would rise), but this was not the case. Rather than most of the night flatlining along at the new higher minimum, much of the night was still north of that. In fact I have eventually pushed my minimum to higher than my old 95%
Initial range 7-12, 95% - 9.5, max never above 11
Now range 10-13, 95% - 11.0, max touches 13 once or twice a night.
I am feeling improved, but I was wondering whether the rise means.....
a) auto-titration by my machine was undergoing things, or
b) I am sleeping better and more deeply, hence necessary pressures are rising
Raising the minimum pressure lets the machine acheive therapeutic levels faster, and that may be at higher average and 95% pressures. Your experience is not unlike a lot of other new users that have started at 4-20, then gradually increased minimum pressures until they stay within a range of just 3-5 cm. The higher minimum pressure seems to prevent events resulting in better sleep, and fewer pressure changes through the night is less disruptive. Looks like a very normal progression to me. Well done!
Thanks for the reply Sleeprider.
I was wondering though why the max pressures had risen after appearing pretty stable at 95-100% values of 9.5-11 when I had already narrowed it from the 4-20 to a 7-12 range on the initial auto titration. I pushed pressures to 10-13 to try to deal with ongoing fatigue.
I should add my formal titration was happy with 5 cm pressure on my side, 6 cm for on my back in REM.
If my current pressures are 95-100% values of 11-13 now, why did the machine only take me to 95-100% values of 9.5-11 before? Makes me wonder if perhaps the machine algorithm can underdo things, let alone the formal titration study that suggested 1/2 my current pressure would be fine?