Thanks, jay, and yeah, that would be great and he has done D&D before (the live version).
Here’s what my experience has been with people with COPD, especially end-stage: The first thing we usually tried was BiPAP via mask and force air down the airways to expand the lungs.
Sometimes that will turn them around, but that mask has to be very tight with no leakage, so they may not tolerate it, depending on how far along they are. If that happens, they “buy a tube”, meaning they get intubated and put on a ventilator. This may or may not happen with our friend. He’s still young and hopefully we can turn him around, but I doubt it: He was sent home with a patch a few days ago, and you can guess what he did, right? Smoked on top of the patch.
So here’s what I’m thinking: He goes on a vent, he gets weaned off the O2 gradually and if he maintains his O2 saturation level and his aterial blood values stabilize, he’ll come off and eventually go home.
Knowing him as we do, however, D and I agree that although they will have fixed the body, nothing will have been done about the mind, and his is a very addictive personality (as it is with all heavy smokers, right?).
“Scared straight?” We hope so, but he’s had a lot of tragedy in his young life, and we believe the cigarettes are his way of dealing with that - they assuage the pain.
He’s a “shirt of the back” kinda guy and never misses a chance to tell D and me that he loves us.
So we’re sitting by the phone, waiting to hear back. D is still not 100% with walking and I of course can’t drive, so here we are. 
Thanks for being there for him and for us, guys!
Bill