The CT scan showed that dad has emphysema really bad, and has scar tissue in/on his lungs. All this is probably from him smoking all those years. But that doesn't explain the blood he has been coughing up -- which is getting worse. So they are going to do another test -- probably Wednesday but could be Thursday -- where they run a light down into his lungs and maybe even take a biopsy to see if there is any cancer.
Whatever comes up there is a high likely-hood that dad will be on oxygen when he comes home. The doctor says he needs to have dad up on his feet and around some before he makes that decision.
That's all I know right now. Please keep us in your prayers,