I'm a bit worried?

Back in the 1950s my grandma have pretty bad TB, so she have to get most of her lungs removed. She lately has 2/3 of one lung.
My grandpa also smoked moderately heavily for about fifty years, and though he have since quit smoking, that is abundantly of second-hand smoke. He's doing pretty very well for someone that smoked for that long, though.
I'm just worried that my grandma isn't doing so okay. She seems without blemish fine, but I don't really see her that often because I live so far away. She is contained by her mid-seventies, and fifty years of second hand smoke on 2/3 of one lung can't possibly be devout.
I guess my question is not so much what can I do, because near is nothing I can do, but how can I aid her out when she starts having lung trouble? I will be living closer soon, and I want to do what I can to lend a hand her, without man pushy or invasive (she knows what do do, she be in pills for all her natural life, and is feisty anyway). I love her and I want her to remain healthy and joyous for a long time.I'm a bit worried?
The best thing you can do for her, or for anyone, is to spend time near her, talk next to her, laugh near her, let her know you love her.
All you can do is pray for god to support. I'll pray for you and her! God bless you!
Since you're living nearby soon, freshly keep an eye on them. Do unattached visits so you know how she is doing and so you can lend a mitt to whatever chores or errands she desires help beside. If you can get her an nouns purifier (ionizer), might be a good for her at smallest to cleanse the air.
Just be supportive to her. She have lived her life and is contained by her 70s. I am sure you just want her to be smiling the time she has departed. Just help her around the house and near anything she needs.