GumbyCT -- I have been so fortunate in my therapy. I don't take naps, but I do sleep a long time -- with mask. I average between eight and nine hours. The shortest was 5.04 when we had to arise early to take my sister-in-law to the hospital for surgery. The night before the card quit I slept 9.10 hours. Is that a factor? The last five nights on the card my AHI was 2.4, 1.3, 1.3, 2.3 and 1.4. I am using a Respironics Nasal Fusion mask with PapCap for headgear.
Anyway -- thanks for your interest and help. Hopefully I will find something out today. My DME will see that I bumped my pressure up a little from 10 to 10.5. I suspect he will have some comment about that.