GBoogie wrote:I've been on CPAP since 2001. I've used a Devilbiss AutoAdjust LT. My previous machine was a Respironics REMstar Auto M-Series.
My new machine, as of last week, is a ResMed S9 AutoSet, with SlimLine tubing. My mask, which is the same mask I used before the change to the new machine, is a ResMed Mirage Active LT. (Nasal)
I've never needed or used a humidifier. I've never had a problem with mouth breathing or dry mouth in 11 years. Until I switched over to the S9. Changed lower pressure from 12 to 13, but that's it.
Anybody have a similar experience?
Why the change in pressure?
I think that your new machine feeds pressure to you somehow differant than your previous machine and so your breathing reflexes do not know what to do with it yet. As a result your breathing becomes unstable and the greater air hunger causes your mouth to dry out (greater air use) and to open your mouth in an attempt to get even more air that you do not need.
Some careful time breathing quietly with the machine laying on your bed during the day may help. I find that breathing in for two counts, breathing out for two counts, and pausing for two counts while going for quiet gentle breathing works well. You know you are breathing gently enough when your feet get warm and your heart rate drops.
Then some time with the machine during the day watching reading a book or listening to music - something to distract. You are building and then setting new breathing reflexes to help with your new machine.
High pressure is a ringer to cause unstable breathing. You might try a lower pressure. You might do very well to try a lower pressure - and - raise the head of your bed a couple of inches (I use concrete bricks from a building suppy store - <$5).
I also find that aerobic exercise with some interval training is very good for the breathing reflexes.
Have a great week!