Below is my encore viewer chart from last night. I’ve finally raised my max APAP pressure (w A-Flex) high enough to have some headroom above the reported 90% (P=16). So my range is now 12 low and 17 high. But there was still a 3/4 hour where the pressure maxed out (see the yellow box starting at 5 hours). Whole bunch of OA’s in there, the bulk for the evening and the major contributor to my AHI of 6.7
My question is this: There was some mask leakage during that period… not a huge amount… at P=15=current max, my mask is rated 43 L/min and this leak during this period looks like about ave 55 total, so about 12 L/min excess. From what I read here that is not enough to blow the max pressure off the top, but there are some larger spikes in there, can those do it? And are those OA readings caused by that? Or is this likely just a normal APAP algorithm doing its job; i.e. I hit some authentic OAs, pressure keeps going up to adjust… can’t go up enough, OAs continue for a while and settle down finally, pressure comes down. And the little extra leakage is just result of the higher pressure (and not enough leakage to be the cause of all that behavior). If latter, if this is just the result of not having the max set high enough, well then I’ll raise my max some more… but I am getting up there in pressure so want to make sure I am not raising max too high against an incorrect interpretation of the chart. By the way, no central apnea reported in my sleep study.
Thanks for your master minds on this! I owe you.
Michael
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