Pat,
A similar question was raised on a different forum during the total ban on hand luggage. The passenger (they were travelling long haul and required the CPAP on-board) called the airline (BA) and received a letter authorising the carriage of medical equipment required for the flight.
I do not know the details of your journey (whether you require it during the flight or do not wish to risk damage in the hold) but suspect that a similar approach would be beneficial (unless you are flying RyanAir
).
Cheers,
Jet.