Hi there,
I was hospitalized with a DVT and PE back in December ('07). At the point that I was hospitalized, I had been scheduled to leave for WDW 2 weeks later. Needless to say, I had to cancel that trip.
My doctor released me to fly again about 2-3 months later, and I rescheduled my trip, and went in June. Had a blast. I'm actually preparing for another short weekend trip for Labor Day.
I'm in the DC area, so the flight times from here to MCO is about 2 hours and a few minutes. I made sure I got up and walked to the rest room and did a little flexing each hour of the flight.
I DO have post-thrombotic syndrome, and therefore require a
scooter to get around the parks because all that walking causes my leg to really swell and get painful. I also keep a collapsible cane with me for extra support when my leg is really giving me some pain/swelling.
I'm considerably younger than your mom (I turned 30 years old a few days after I got out of the hospital back in Dec.), but, I still find that I need the extra support of having an
ECV. (I also have Lupus, which was diagnosed as a result of the DVT, so I can tire out very easily too, if not careful, and end up very sick. They also found out I have a clotting disorder... but I digress).
Anyway, I just wanted to say that, I was able to fly just fine, and I hope that it is the case for your mom as well. I leave again in one month!
Here's hoping for a great trip for ALL of you!