qjosea,
Here is my wild guess:
Your earlier post in another thread as a guest stated:
qjosea157, guest wrote: "I called and saw the tech for apria and explained what was happening with the bipap. He rand a check on the machine and said it was working correctly based on the prescription the doctor requested."
You also said:
"I've seen my doctor twice. The first time in Nov 07, that's when I was diagnosed w/mild to moderate sleep apnea. The tech said I had stopped breathing about 57 times in one hour. My doctor prescribed a cpap then. I tried to get used to it for about a year and gave up. Then in august of this year I thought I was going to die."
If the person from Apria you spoke to spoke truth with knowledge, that may mean the doc considers you to have "failed CPAP" and has given you bilevel at a low pressure to get you compliant first in order to then go from there. In other words, they may think they are going easy on you by having you start out with your machine set up that way and are now trying to test whether or not you are willing to continue using a machine at night, since you stopped before.
IF that is what has happened, I might call my doc, tell him AHI is at 15.5, and ask about the possibility of higher pressures in order to actually treat the obstructions, if that's what they are. I would also ask my doc straight out if I might have central apnea, if I was worried about that. But I would go by what the doc said, not the "tech." And I might hesitate to make the change myself, in this case, in view of my history of what the doc might consider "uncooperative" from before, since cooperation might earn you the privilege of keeping that machine. But I would make the call today and not wait around with my AHI that high.
But, hey, that's just me.
jeff