I would certainly bring in several days of Sleepyhead charts that show the Centrals as a concern. I only get 2-3 a night and that is on a BAD night, so 25-30 seems like a lot to me.
One clue on CA vs OA is the flow around the event. When breathing ends on an inhale, it is almost always a SWJ change in position or CA. Most CA events terminate with normal breathing restarting, not a strong recovery breath(s). Events beginning in a flow limitation (down-sloped peak inspiration) and especially when followed by recovery breathing are clearly OA. It's not possible to accurately know what a CPAP flagged event 'really' is, but you can second-guess them pretty well.
When you removed your EPR entirely (I assume you've already tried that) did you leave it off for a week to see if made any difference? It took a couple of days but for me removing EPR entirely quite reduced my CA events. If you haven't left it off for an extended period of time I would try that. Especially now that you are more used to the treatment. You may end up being pleasantly surprised. Or not. Either way, worth a try.
Out of curiosity, what sre the average CA duration times?
3 hours ago
(This post was last modified: 3 hours ago by quiescence at last. Edited 1 time in total.
Edit Reason: typos
the wiggle wobbles in your pressure chart are places where the machine senses pre-cursors of obstructive apnea, like flow limitations. I know this was at the beginning of the month, but if this were MY chart today I would ditch the ramp (or start at 7) and set my minimum at 8 (even if adding back EPR=1). This follows the basic rule of having your min at the higher of (1) median pressure compared to (2) 95% pressure minus 2 cm. [7.78 vs. 7.58]= 8
all in all, though, it is nice to be under AHI of 1.0 (pressure correctable apnea).
nice job and charts all around.
Dedicated to QALity sleep.
You'll note I am listed as an Advisory Member. I am honored to be listed as such. See the fine print - Advisory Members as a group provide advice and suggestions to Apnea Board administrators and staff concerning Apnea Board operation and administrative policies. Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.
3 hours ago
(This post was last modified: 3 hours ago by ajack. Edited 1 time in total.)
you have a longer inspiration and a shorter expiration than normal I:E ratio. I would only be guessing to give any reason or appropriate action. I would bring it to the attention of your doctor.
If it was my chart, I'd try to lift minimum pressure to get the air in quicker. less of an auto and more of a fixed cpap type thing. I'd also increase the EPR if it does not increase centrals too much.