Thanks, I'm changing it to 10 cm when I get home

I have an old Invacare I've been using for 8 yrs, Had a Resperonics for 12 before that. For some odd reason they wanted me to have a new sleep study. I had been adjusting my own pressures over the last 20 years and have been doing a "fair" (I thought) job of it. Doctor would not write a prescription...