To answer your queries, I am using a full-face Dreamweaver mask that covers just the nostrils, not the whole nose; and a Resvent CPAP Auto 5-20 Machine with a heated humidifier. The machine has auto-titration (spelling?). I talked to my therapist yesterday and he thought that all my problems stemmed...

Thank you everyone for your thoughtful and careful replies. This forum is going to be a big help. I will look up the information you asked for and make another post.
— Hildegarde

I used the machine for the first time last night and could only stick with it for about 90 minutes. It kept waking me up. As soon as I felt myself drifting off to sleep, a big rush of air would come in and wake me up. The machine was also very loud, but I could have tuned that out and fallen asleep ...