I thought I'd update my experience using cpap on a long flight. I used the same airline/plane type for another trip to Asia.
I'm not sure if the plane (Dreamliner) was 'older', but the power outlets in the seat were 'worn'. My plug wouldn't stay in. Shift in seat a bit while sleeping, and it disconnected. I tried spreading the prongs a bit, multiple times. This happened on two separate planes. Very annoying.
The outlet in the plane seat was a multi-connector type. I had NO problems on a flight earlier this year, but this time, both long hauls on the same trip had 'sloppy' outlets.
On the return flight I think the passenger in the adjacent seat complained to the flight attendant about me constantly fussing with the outlet.
The outlet was so hard to find and reach in the plane seat, (in a cubby under the console, next to my butt) I had to bring the seat erect, stand up, fumble for my penlight in the darkened plane, then hunt for the outlet, and fumble bit.
(repeatedly)
I was looking forward to the decent amount of sleep I got on the 12-13 hour flights before, but this time only managed 3-4 hours on the long legs at the most.
On the return, long flight, the alerted attendant tried to help me, but didn't really undertsand what the cpap machine was for.
'Are you scared of airplane?" (NO)
'Oxygen?' (NO)
I tried to explain the outlet, (which had worked well on other planes) was 'loose', or worn.
Eventually he lent me a electrical plug converter that worked a little better, but still didn't stay in long.
He then told me something I interpreted as 'we will check on you every ten minutes to see if you are still breathing'.
I tried to explain that wasn't necessary.
The next time I'll take a couple of different adapters with me, in case I run into the same situation.
Security has never paid much attention to my cpap machine, which somewhat surprises me.