Thanks for your reply.

>> "IS your minute vent in a reasonable range?"
I don't understand how I can see this from the Resmed 10 data? Please explain.

>> Can your fitness tracker upload minute-by-minute, or hour-by-hour data to an app or to a desktop?
Not that I have discovered, but will do more checking.

>> Does it take an ECG?
No, but I sure wish it did.

Having done a bit more research, it appears to be sporadic, but has also been occurring off/on only in the last few weeks. During that time, my PCP and I have tried to lower one of my BP meds (Spironolactone) due to my BP getting a bit low, but I since backed out the change. Also about the time, I fell backwards on concrete, smacked my head, but had no symptoms other than a mild headache.

The big problem with my sleep is that I have zero deep sleep and have significant brain fog. I have a lot of body pain hips, back, shoulders, ribs due to arthritis and due to low platelets post-chemo. I take NSAIDs sparingly.

The more I do stuff - even light duty things - the pain ratchets up and the AHIs go up as does movement, I do use a soft cervical collar at night. My PCP also gave me some gabapentin to try, but I've not made a serious attempt at using it yet with so many moving parts it's impossible to figure out what works and what doesn't.

I've stopped my evening Mg supplement to see it that's beneficial or detrimental - that could be why the AHIs have bumped up the last 5 days. Previous 5 days were under 2.5 and two were under 2, so I'm restarting the Mg.

I need discipline myself to change only one thing at a time and keep better change records so I can isolate the effect of changes better.