I think Rolf nailed it. Also, if you don't have the proper venting the efficiency of dust removal will decrease. As was mentioned earlier, with just a tiny bit of dust you won't have to empty the bag very often.
I have no limitations in the shop but I can only imagine what you're going through. I've seen videos of folks scrolling and turning with their feet so I told my wife if I loose the use of my arms it just means I have to learn to use my feet.
Good luck with the healing process and don't push it too much.