I don't know how everyone else feels but, just the act of doing things for my Sir that i know he likes, (even when he didn't tell me too) make me feel wonderful and when i am praised for it, makes me feel all wet.
So perhaps simply the act of taking care of him while he is recovering, and seeing his approval, could give you some of the satisfaction that you need on a mental and emotional level. Dominance isn't all about the physical stuff.
Hope this helps.