I wouldn't risk it. We rode this a few weeks ago for the first time. My husband is on blood thinners due to heart disease and is a slim guy, 44 years old. He can't ride anything that will "bump, jostle or crush" him according to his cardiologist.
We went to the ride vehicle out front, explained this to the CM and he emphatically stated that this was only slightly more movement than Soarin. He assured us that my husband would be just fine, and allowed him to sit in the seat.
When we loaded, the CM -- Missy -- walked by and literally slammed the back restraint into me. I immediately turned and started to say, "You can't hit my husband that hard" when I heard a SCREAM as I watched (as if in slow motion) her literally SLAM the back restraint into my husband. As I mentioned, he's very slim, and his spinal column doesn't have as much fat protecting it as I do (lol, new mom here). When he screamed in pain, the CM did nothing, just moved on. Afterward, my now miserable and in pain husband went up to the CM and said, "Hey, you can't slam people like that, you hurt me." She literally just turned and walked away - said nothing.
We went to guest relations, and they were so nice. They insisted on calling a medic (for their own protection). My husband ended up with a huge bruise and was sore the rest of the trip. We didn't want anything, just someone to speak to that CM about her unnecessary force so that no one else would be hurt (my brother in law had sat next to my husband during the right and afterward said, "Wow, it seemed like she had an axe to grind against him" - that's how hard it was). They ended up adding FPs to our tickets for our entire party for the rest of the trip, which was very nice and unnecessary.
But the reason I'm sharing this story is because while in theory, that shouldn't happen to ANYONE. Reality is that it did happen to us. And if my mom had stage 4 cancer and I was worried about her, I wouldn't take the risk.