(05-22-2015, 01:28 PM)Sleeprider Wrote: Just want to add, you can basically subtract the CA from the total AHI. It won't respond to pressure and many times is inconsequential, and may just reflect a normal arousal.
I'm confused about the CA a little by Sleeprider's comment. I'm still new so I am probably combining separate ideas into a wrong conclusion, or maybe even made erroneous notes from previous threads.
Need some feedback on the following...
My prior understanding was that you crank up the pressure as needed to breakthrough the OAs. But if the pressure gets too high beyond what is needed to nail the OAs, then it might actually create new CAs and hypopneas because the pressure works against a natural exhale.
Based on that understanding I was doing a little study on opening up my S10 in auto mode to see what might happen to improve on my AHI which hadn't yet settled down under 5 in my first two weeks of therapy at a constant setting.
My CPAP Rx was 10. I turned it on auto 4-20 for a week or so and what I saw was pressures up around 14 would eliminate almost all the OAs. Most of the hypops and nearly all of the CAs were occuring at pressures above 14 (except for ones very early and very late which I think were transitional into and out of sleep).
With the drop from 10 to 4 initial pressure, I was uncomfortable breathing, so I reset the auto range to 8-14 and ran for another week. I started to notice that OAs were not all going away during that week, and so a couple of days ago I bumped the auto range to 9-14.6 and I'm watching now for a week to see what happens.
I am trying to goose the pressure up a little at a time if needed for OAs but also trying to not get above where the CAs crept in. That might be a flawed strategy based on Sleeprider's comment on OAs. There was also another comment on a different thread where someone said CAs are normal until your body gets used to the therapy. So I have a couple of question marks against my understanding of CAs caused by pressure.
My original plan was to get this as good as I can get based on what I have learned here, and then show you guys a typical report to ask for advice on next steps.
Sleeprider's comment about CAs generally not responding gave me a pause to stop and make sure I am not running down some wrong path with my own made-up strategy.
It might be that naturally occurring CAs don't respond to CPAP therapy but it's possible to cause some artificially by too much pressure. That would fit in with what I understand up to now, but I might also be all wet on CAs altogether.
Any feedback or thoughts?