OldNSalty, I am truly elated your wife recovered enough to make the trip! I know it was extra work for you, but am so glad you all were able to make it. I would think that you should have been able to have carried on your oxygen equipment, but that is truly my opinion. It would be like a diabetic needing their insulin, to me. However, I can also understand needing to go through security. I really don't know what the TSA rules are, but they very well may vary from port to port as the port authority can implement the rules the way they see fit. It's much like the FAA, the rules are interpreted differently by different gateways.
I'm glad you're back and hope that you had an enjoyable and memorable cruise!