The difficulty here is determining whether the information recovered from a home xPAP machine is valid.
Sleep Labs of course have the ability to cross-refer any graphical disturbance using sophisticated equipment ..EEG , ECG , Oximetry and a host of body sensors etc to resolve most if not all uncertainties.
This is why I favour listening to your specialist and making the assumption that he/she is on the case and acting in your best interests.
Not to say there are not exceptions...and I have experienced two bottom-feeders -one a specialist the other a provider - but no point boring you with the details except to say they got dumped and I moved on.
I read all the forums - not just this one. I use Sleepyhead every morning - looking for clues. I am a mouth-breather but I just purchased a nasal pillow mask (Philips Nuance) and was surprised by the result and it may become my mask of choice (but too early to say) as I used a few tips gained here and it seems I can adapt.
Surprised how few on these forums seem to be trying oximeters which would certainly resolve - or help to resolve - some of the possible misinterpretations of the software and decrease the anxiety level. After watching a product video I wrote direct to Nonin about their x-Pod product. They do not "supply the public" the writer replied apologetically. I found a distributor subsequently - the price was $985 !
OK - not so surprised any more. But I ordered a CMS50F a week ago - should arrive shortly and hope to junk a number of suspect OA and CA if the SPo2 levels do not confirm. My guess on many of these occasions is poor mask fit - which is supported by high leak rate presentation. FFM masks have an endemic mask fit problem here which is why I am experimenting with the Nuance Pillow mask. I navigate the bed boundaries and hate sleeping on my back and favour mouth - breathing so it was assumed by all that I required a FFM. No more assumptions. All this indicates I am a slow learner. Not really. I was diagnosed moderate to severe in Jan 2013. Went through all the hoops but after they hoovered my wallet I was not getting any of the promised results and compliance fell to zero. Found Sleepyhead and a considerable dose of introspection only a few weeks ago but the results are very encouraging. Might have to change my screen name to Under New Management.
What kind of desats do you think that should get with real CAs?