I was diagnosed with OSA twelve years ago and in a sleep study last August, I was diagnosed with Complex SA and CSA. Initially, I was prescribed with a Resprionics Bipap ST, which brought my AHIs down to the 20’s and after another sleep study in April, my pulmonologist prescribed the PR System One Bipap Auto SV Advanced which I’ve been using since early May. After increasing my EPAP to 8 mid-June (my Rise Time is 3), I have had relatively low AHIs (below 4) but over the past two weeks, I have had 9 days of AHIs above 6 and as high as 13! I haven’t done anything differently except getting a new mask cushion, which helped for a day or two. Does anyone have a suggestion in helping me get my AHI’s back down to 3 or below?